DESIGN NARRATIVE 100% DESIGN SUBMISSION FY21 - MCNAIR GROUP 01 QUARTERS 10 15 - USACE - NATIONAL CAPITAL PLANNING ...

Page created by John Mann
 
CONTINUE READING
DESIGN NARRATIVE 100% DESIGN SUBMISSION FY21 - MCNAIR GROUP 01 QUARTERS 10 15 - USACE - NATIONAL CAPITAL PLANNING ...
Design Narrative
100% Design Submission
FY21 - McNair Group 01 Quarters 10 - 15

USACE

Project reference: JBMHH Army Family Housing
Project number: 60615576

June 09, 2021
DESIGN NARRATIVE 100% DESIGN SUBMISSION FY21 - MCNAIR GROUP 01 QUARTERS 10 15 - USACE - NATIONAL CAPITAL PLANNING ...
Design Narrative
                      Project reference: JBMHH Family Housing
                       Solicitation Number – W912DR21BXXXX

Prepared for: USACE                                  AECOM
DESIGN NARRATIVE 100% DESIGN SUBMISSION FY21 - MCNAIR GROUP 01 QUARTERS 10 15 - USACE - NATIONAL CAPITAL PLANNING ...
Design Narrative
                                                                                       Project reference: JBMHH Family Housing
                                                                                        Solicitation Number – W912DR21BXXXX

                 Quality information
                     Prepared                      Checked                   Verified by                      Approved
                     by                            by                                                         by
                     Blank                         Blank                     Blank                            Blank

                     Krista                        Joshua                    Ryan                             Krista
                     Kehrer                        Levy                      Horner/Troy                      Kehrer
                     Project                                                 Metz
                     Manager

                 Revision History
Revision                        Revision               Details            Authorized                Name                    Position
                                  date
           0                    Blank                  Blank              Blank                     Blank                   Blank
        Blank                   Blank                  Blank              Blank                     Blank                   Blank
        Blank                   Blank                  Blank              Blank                     Blank                   Blank
        Blank                   Blank                  Blank              Blank                     Blank                   Blank

                 Distribution List
                 # Hard                    PDF                   Association / Company Name
                 Copies                    Required
                 Blank                     Blank                 Blank
                 Blank                     Blank                 Blank
                 Blank                     Blank                 Blank
                 Blank                     Blank                 blank

  Prepared for: USACE                                                                                                 AECOM
DESIGN NARRATIVE 100% DESIGN SUBMISSION FY21 - MCNAIR GROUP 01 QUARTERS 10 15 - USACE - NATIONAL CAPITAL PLANNING ...
Design Narrative
                                                                              Project reference: JBMHH Family Housing
                                                                               Solicitation Number – W912DR21BXXXX

               Prepared for:
USACE W912DR21BXXXX -W912DR19F0647
Vivian Wong
2 Hopkins Plaza
Baltimore, MD 21201

               Prepared by:
Krista Kehrer
Project Manager
T: 703-682-4973
M: 703-867-7948
E: krista.kehrer@aecom.com

AECOM
3101 Wilson Boulevard
Arlington, VA 22201
aecom.com

               Copyright © 2019 by AECOM

               All rights reserved. No part of this copyrighted work may be reproduced, distributed, or
               transmitted in any form or by any means without the prior written permission of AECOM.

Prepared for: USACE                                                                                          AECOM
DESIGN NARRATIVE 100% DESIGN SUBMISSION FY21 - MCNAIR GROUP 01 QUARTERS 10 15 - USACE - NATIONAL CAPITAL PLANNING ...
Design Narrative
                                                                                                               Project reference: JBMHH Family Housing
                                                                                                                Solicitation Number – W912DR21BXXXX

Table of Contents
1.         General Description ......................................................................................7
2.         Design Requirements and Provisions Building Group 01 Quarters 10 -
15         13
2.1.1      Civil .......................................................................................................................................... 13
2.1.2      Landscape Architecture ............................................................................................................. 19
2.1.3      Structural .................................................................................................................................. 23
2.1.4      Architecture............................................................................................................................... 25
2.1.5      Fire Protection / Life Safety ....................................................................................................... 51

Prepared for: USACE                                                                                                                                AECOM
DESIGN NARRATIVE 100% DESIGN SUBMISSION FY21 - MCNAIR GROUP 01 QUARTERS 10 15 - USACE - NATIONAL CAPITAL PLANNING ...
Design Narrative
                                                           Project reference: JBMHH Family Housing
                                                            Solicitation Number – W912DR21BXXXX

                      This Page Intentionally Left Blank

Prepared for: USACE                                                                       AECOM
DESIGN NARRATIVE 100% DESIGN SUBMISSION FY21 - MCNAIR GROUP 01 QUARTERS 10 15 - USACE - NATIONAL CAPITAL PLANNING ...
Design Narrative
                                                                               Project reference: JBMHH Family Housing
                                                                                               Project number: 60615576

1. General Description
1.1 Introduction
               The Design Narrative summarizes AECOM’s Design Documents in accordance with the 28
               January 2021 Scope of Work (SOW) for the Joint Base Myer Henderson Hall (JBMHH) project
               in addition to the Final Design Charrette Reports for FY21 dated 10 February 2021. The
               programming effort assessed the conditions of 12 historical family housing units at Fort Myer
               and Fort McNair and provide Architecture and Engineering documents to bring these housing
               units back into good repair. The housing units cover FY21 anticipated designs.

               FY21 – McNair Group 01 Quarters 10-15 (Single Family)
               FY21 – Myer Group 11 Quarters 08 (Single Family)

               This report will cover the existing conditions and requirements for McNair Group 01 Quarters
               10-15.

1.2 Project Drawings
               This project’s drawings for the Design Charrette Report have been prepared using Autodesk
               Revit 2019 and Enterprise CADD Standard Version 6.0. Select civil and sitework drawings
               have been prepared using a three-dimensional AutoCAD platform. As per the SOW, AECOM
               has prepared the project documents using Imperial units of measure only.

1.3 Specifications
               The project’s specifications sections indicate the proposed editing in SpecsIntact – the
               automated system for preparing standardized facility construction specifications that is used
               worldwide by the U.S. Army Corps of Engineers (USACE), National Aeronautics and Space
               Administration (NASA) and the U.S. Naval Facilities Engineering Command (NAVFAC).

1.4 Construction Cost Estimates
               Estimates for each respective phase of construction have been prepared in accordance with
               Unified Facilities Criteria (UFC) 3-700-02A – Construction Cost Estimates using the military‘s
               Micro Computer Aided Cost Engineering System (MCASES) II software platform.

               The estimates were prepared as a result of close collaboration between the project design
               team and the cost estimating team.

               Estimates are broken down into Base Bid and Bid Options per the funding amounts outlined in
               the scope of work.

1.5 Report Criteria
               This Report is based on the USACE, Baltimore District, Instructions and Guidance to Architect-
               Engineers Military Construction and the Department of the Army, USACE, Engineering and
               Design Analysis, Drawings and Specifications.

               All documentation has been prepared in accordance with AECOM‘s contract specific Design
               Quality control Plan (DQCP). AECOM is an International Standards Organization (ISO) 9001
               certified organization.

Prepared for: USACE W912DR19D0013-W912DR19F0647                                                                AECOM
DESIGN NARRATIVE 100% DESIGN SUBMISSION FY21 - MCNAIR GROUP 01 QUARTERS 10 15 - USACE - NATIONAL CAPITAL PLANNING ...
Design Narrative
                                                                             Project reference: JBMHH Family Housing
                                                                                             Project number: 60615576

1.6 Codes, Standards and Guidelines
1.6.1 International Code Council (ICC) Model Codes
               •   International Residential Code (IRC) 2018
               •   International Building Code (IBC) 2018
               •   International Existing Building Code (IEBC) 2015
               •   International Plumbing Code (IPC) 2018 - Classification Residential, Occupancy R-3, One-
                   and two-family dwellings

1.6.2 National Fire Protection Association (NFPA)
               •   NFPA-70A, National Electrical Code Requirements for One- and Two- Family Dwellings,
                   latest edition including all subsequent addendums 2005 Edition
               •   NFPA-75, Standard for the Protection of Information Technology Equipment 2003 Edition
                   Intra-Building Pathway Systems
               •   NFPA-72, National Fire Alarm and Signaling Code 2019 Edition
               •   NFPA-13D, Standard for Installation of Sprinkler Systems in One- and Two-Family
                   Dwellings and Manufactured Homes 2019 Edition
               •   NFPA-101, Life Safety Code 2018 Edition
               •   NFPA-110, Standard for Emergency and Standby Power Systems 2019 Edition
               •   NFPA-780, Lightning Protection Systems 2020 Edition

1.6.3 Industry Standards and Guidelines
1.6.3.1 American Society of Civil Engineers (ASCE)
               •   ASCE/SEI 7-16, Minimum Design Loads and Associated Criteria for Buildings and Other
                   Structures

1.6.3.2 American Society of Heating, Refrigeration and Air Conditioning Engineers
        (ASHRAE)
               •   ASHRAE Fundamentals 2013
               •   ASHRAE 90.2, 2010, Energy-Efficient Design of Low-Rise Residential Buildings
               •   ASHRAE 62.2, 2010, Ventilation and Acceptable Indoor Air Quality in Low-Rise
                   Residential Buildings
               •   ASHRAE Standard 140, 2017, Standard Method of Test for the Evaluation of Building
                   Energy Analysis Computer Programs

1.6.3.3 Building Industry Consulting Service International (BICSI)
               •   BICSI Telecommunications Distribution Methods Manual, latest edition

1.6.3.4 American Society of Testing and Materials (ASTM)
               •   ASTM D 5778, Seismic Piezocone Penetration Tests (SCPTu)
               •   ASTM D 6635, Flat Plate Dilatometer Testing (DMT)

Prepared for: USACE W912DR19D0013-W912DR19F0647                                                              AECOM
DESIGN NARRATIVE 100% DESIGN SUBMISSION FY21 - MCNAIR GROUP 01 QUARTERS 10 15 - USACE - NATIONAL CAPITAL PLANNING ...
Design Narrative
                                                                              Project reference: JBMHH Family Housing
                                                                                              Project number: 60615576

               •   ASTM D 4719, Prebored Pressumeter Tests (PMT)
               •   ASTM E119, Standard Test Methods for Fire Tests of Building Construction and Materials

1.6.3.5 American National Standards Institute (ANSI)
               •   ANSI/TIA-569-E, Telecommunications Pathways and Spaces

               •   ANSI/TIA-570-D, Residential Telecommunications Infrastructure

               •   ANSI/TIA-606-C, Administration Standard for Telecommunications Infrastructure

               •   ANSI/TIA-607-D, Generic Telecommunications Bonding and Grounding (Earthing) for
                   Customer Premises

1.6.3.6 Underwriter's Laboratory (UL)
               •   UL 263, Standards for Fire Tests of Building Construction and Materials

1.6.3.7 American Society for Photogrammetry and Remote Sensing (ASPRS)
               •   Accuracy Standards for Photogrammetry and Remote Sensing Accuracy Standards for
                   Large Scale Maps

               •   Manual of Photogrammetry

1.6.4 Federal Government Legislation, Regulations, Standards and
      Guidelines
1.6.4.1 Unified Facilities Criteria (UFC)
               •   UFC 1-200-01, General Building Requirements (08 October 2019)

               •   UFC 1-200-02, High Performance Sustainable Building (HPSB) Requirements, Change 4
                   (1 October 2019)

               •   UFC 1-300-02, Unified Facilities Guide Specifications

               •   UFC 1-300-08, Criteria for Transfer and Acceptance of DoD Real Property

               •   UFC 3-101-01, Architecture with Change 5, 25 September 2019

               •   UFC 3-110-03, Roofing with Change 4, 01 May 2012

               •   UFC 3-120-10, Interior Design, 15 May 2018

               •   UFC 3-190-06, Protective Coatings and Paints, 16 January 2004

               •   UFC 3-201-01 Civil Engineering

               •   UFC 3-230-01 Water Storage and Distribution

               •   UFC 3-230-17FA Drainage in Areas Other than Airfields

               •   UFC 3-240-07FA Sanitary and Industrial Wastewater Collection: Gravity Sewers and
                   Appurtenances

               •   UFC 3-301-01, Structural Engineering (01 October 2019)

               •   UFC 3-410-01, Heating Ventilation and Air Conditioning Systems, 01 July 2013 Change
                   05, 01 Nov 2019

Prepared for: USACE W912DR19D0013-W912DR19F0647                                                               AECOM
DESIGN NARRATIVE 100% DESIGN SUBMISSION FY21 - MCNAIR GROUP 01 QUARTERS 10 15 - USACE - NATIONAL CAPITAL PLANNING ...
Design Narrative
                                                                             Project reference: JBMHH Family Housing
                                                                                             Project number: 60615576

               •   UFC 3-420-01, Plumbing Systems, Plumbing Systems, 25 October 2016 Change 04, 01
                   OCT 2019

               •   UFC 3-520-01, Interior Electrical Systems, 06 October 2015 Change 01, 20 March 2019

               •   UFC3-530-01, Interior and Exterior Lighting Systems and Controls, 01 April 2015 Change
                   04, 01 November 2019

               •   UFC 3-600-01, Fire Protection Engineering for Facilities (08 August 2016, Change 4, 07
                   February 2020)

               •   UFC 3-700-02A, Construction Cost Estimates Using the Military's Micro Computer Aided
                   Cost Engineering System (MCASES) II Software Platform

               •   UFC 3-701-01, DoD Facilities Pricing Guide

               •   UFC 3-730-01, Programming Cost Estimates for Military Construction

               •   UFC 3-740-05, Handbook: Construction Cost Estimating

               •   UFC 4-010-01, DoD Minimum Antiterrorism Standards for Buildings (12 December 2018)

               •   UFC 4-010-06, Cybersecurity of Facility-Related Control Systems, Change 1

               •   UFC 4-711-01, Family Housing

               •   UFC 4-711-02A, U.S. Army Service Schools

1.6.4.2 United States Army Corps. Of Engineers (USACE)
               Engineering and Construction Bulletin (ECB)

               •   ECB 2018-11, Control System Cybersecurity Coordination Requirement, dated 09 August
                   2018

               Engineering Manual (EM)

               •   EM 385-1-1, Safety and Health Regulations

               •   EM 1110-1-1000, Photogrammetric Mapping

               •   EM 1110-1-1002, Survey Markers and Monumentation

               •   EM 1110-1-1003, NAVSTAR Global Positioning System Surveying

               •   EM 1110-1-1005, Topographic Surveying

               •   EM 1110-2-1003, Hydrographic Surveying

               Engineering Regulation

               •   ER-1110-1-261, Quality Assurance of Laboratory Testing Procedures

               •   ER 1110-345-700, Design Analysis

               •   ER-1110-345-723, Total Building Commissioning Procedures, dated 31 March 2017

Prepared for: USACE W912DR19D0013-W912DR19F0647                                                              AECOM
Design Narrative
                                                                              Project reference: JBMHH Family Housing
                                                                                              Project number: 60615576

1.6.5 Other Guidelines, Codes, Regulations and Local Utility
      Requirements
1.6.5.1 Installation Guidelines
               •   Joint Base Real Property Master Plan Fort Myer Fort McNair Henderson Hall Installation
                   Design Guide, January 2013 (IDG)

1.6.5.2 Local Municipalities
               •   2013 District of Columbia Plumbing Code

               •   District of Columbia Stormwater Management Guidebook

               •   District of Columbia Erosion and Sediment Control Handbook

               •   District of Columbia DC Water Project Design Manual

1.6.5.3 Other
               •   Load Calculation Program – Trane Trace 700 in accordance with ASHRAE Standard 140

               •   https://geopub.epa.gov/Radon/

1.7 Bid Options
               The requirements for these quarters will include construction bid options. The options are
               outlined in this report and on the matrix found in Appendix A. The base requirements are
               intended to improve the life, health, safety of the buildings. The bid option expands the
               renovations to improve the function of each quarters.

Prepared for: USACE W912DR19D0013-W912DR19F0647                                                               AECOM
Design Narrative
                                                                           Project reference: JBMHH Family Housing
                                                                                           Project number: 60615576

                                      This Page Intentionally Left Blank

Prepared for: USACE W912DR19D0013-W912DR19F0647                                                            AECOM
Design Narrative
                                                                                     Project reference: JBMHH Family Housing
                                                                                      Solicitation Number – W912DR21BXXXX

2. Design Requirements and Provisions
   Building Group 01 Quarters 10 - 15
2.1 Building Group 01 Quarters 10 - 15
2.1.1 Civil
2.1.1.1 Existing Conditions
               The Group 01 quarters at Fort McNair are single family dwellings aligned in a row fronting the
               west side of 2nd Avenue which runs north south. The buildings are spaced approximately 40
               feet apart, set back approximately 50 feet from 2nd Avenue, with a rear yard also approximately
               50 feet from 1st Avenue which parallels 2nd Avenue. It is noted that the avenue numbering
               system within Fort McNair is not coordinated with the street numbering system outside Fort
               McNair in the District of Columbia, Southwest (DC SW). Each quarters have a fenced-in
               concrete patio on its south side (left as you face the house from 2nd Avenue) with the exception
               of Quarters 15 which has its patio on the north side. There is a total of 15 units in the row,
               numbered from north to south. The scope of the current effort encompasses Quarters 10 – 15
               only.

               In preparing this report a comprehensive integrated review of GIS documents, historic design
               documents, topographic survey data, geophysical subsurface utility survey data, and field
               observations was conducted to resolve any discrepancies among the data sources. Where
               available information was insufficient to resolve a particular issue, the contractor is directed to
               conduct further investigation (e.g., test pits) during construction to avoid conflicts.

2.1.1.1.1 Grading
               Topographic grades along 1st and 2nd Avenues are extremely flat – less than 0.3% based on a
               topographic survey conducted by AECOM in October 2020. There is also very little slope from
               the building fronts to the curb on 2nd Avenue, and between quarters. There is a comparatively
               shallow gradient from the back yards down to 1st Avenue, but over time settling, landscaping
               activities, utility work, etc. have resulted in localized low spots where water ponds in the yards
               and around the building foundations. Some of the quarters were observed with sandbags
               stacked around exterior basement stairwells to prevent surface runoff into the basements, and
               post staff have stated that all of these buildings have basement/foundation water problems.

                                Photo 1 – Sandbags Stacked by Basement Stairs Quarters 12

Prepared for: USACE                                                                                                 AECOM
Design Narrative
                                                                                        Project reference: JBMHH Family Housing
                                                                                         Solicitation Number – W912DR21BXXXX

2.1.1.1.2 Stormwater
               Utility record drawings prepared by STV/Lyon Associates dated July 1996 were compared
               against GIS utility maps provided by the installation and found to be consistent with one
               another, and generally with field observations.

               Surface drainage from the front yards of Quarters 12 through 15 flows overland east to 2nd
               Avenue where it would be captured by a pair of storm drain inlets (catch basins) in the west
               curb line of the street – one between Quarters 11 and 12, and one just southeast of Quarters
               13. That water would then be conveyed by a small (12-inch) stormwater main running between
               Quarters 11 and 12 to discharge into the tidal Washington Channel west of 1st Avenue. Runoff
               in the rear yard flows west to 1st Avenue where there is a pair of inlets similarly located in the
               east curb line of that street to collect the drainage. These inlets also carry stormwater to the
               point of discharge into the Channel. Drainage from Quarters 10 and 11 flows in these two
               streets a few hundred feet further to the north and is then similarly collected from the front
               yards in inlets in 2nd Avenue, and from the rear yards in inlets in 1st Avenue, then conveyed
               westward in pipes to an outlet into the Channel.

               The Washington Channel is far enough removed both horizontally (almost 100 feet), and
               vertically (at least 10 feet) from the structures that it has not been identified as a significant
               source of the water problems for these buildings and is not considered further in this
               discussion. Current FEMA flood mapping indicates that none of these quarters is within a
               regulatory 100-year floodplain, though portions of the rear yards nearest 1st Avenue are.

               Each of the houses has multiple roof drain downspouts, almost all of which discharge directly
               into an underground pipe or leader. Some of these leaders may possibly be connected to
               small (4-inch) diameter plastic drainpipes that have been cut through the curb line in 1st
               Avenue, though no mapping was found that would indicate the route or location of these
               connections. No visible signs of clogged or backed up roof drains were observed.

                                Photo 2 – Possible Roof Drain through Cut in Curb Quarters 10

Prepared for: USACE                                                                                                    AECOM
Design Narrative
                                                                                        Project reference: JBMHH Family Housing
                                                                                         Solicitation Number – W912DR21BXXXX

               Basement sump pumps also contribute to stormwater flow by discharging either into the
               underground roof drain system, or directly to the ground surface.

               Quarters-specific issues or deficiencies are noted below:

               •      Quarters 11, 12, 13, 15: sandbags stored near the exterior basement stairwell (northwest
                      corner) indicate periodic surface water flooding
               •      Quarters 14: this Quarters was visited during a rainstorm and ponded water was
                      observed directly adjacent to the southwest corner of the building foundation.

                                  Photo 3 – Ponding at Roof Drain by Foundation Quarters 14

2.1.1.1.3 Water
               Utility record drawings prepared by STV/Lyon Associates dated July 1996, and Maryland
               Surveying and Engineering Co. (undated) were compared against GIS utility maps provided by
               the installation and found to be generally, but not completely, consistent with one another.

               The GIS maps and record drawings indicate that water is provided to Fort McNair via a 12-
               inch feeder main connection in 4th Street SW. This connection is metered, but there are no
               meters for these homes individually. The quarters in Group 01 are served by an 8-inch
               distribution branch main running in the front yards of the quarters parallel to 2nd Avenue.
               House water services are depicted with a single service line between adjacent buildings,
               branching to serve both buildings, e.g., one line between Quarters 10 and 11, branching to
               serve both; one line between Quarters 12 and 13, branching to serve both, etc. There is
               supposed to be a valve on the primary service line at the main, and a valve on each of the
               branches near the building, but no water meters. The Maryland Surveying Co. drawings
               indicate that these house service lines are 3-inch diameter; however, the GIS maps show the
               service lines as 2-inch diameter.

               Fire hydrants serving these quarters were found on 2nd Avenue just north of the subject area
               at the front of Quarters 9, between Quarters 12 and 13, and just south of the group near the
               southeast corner of Building 60 (the old Officers Club). Fire flow pressure test results were

Prepared for: USACE                                                                                                    AECOM
Design Narrative
                                                                                    Project reference: JBMHH Family Housing
                                                                                     Solicitation Number – W912DR21BXXXX

               provided by the government for tests conducted at these hydrants in May 2020. These tests
               indicated satisfactory flow capacity (approximately 2200 gpm at a desired flow rate of 20 psi).
               Quarters-specific issues or deficiencies are noted below:

               •      Quarters 10 and 11: drawings and GIS indicate that a single water service line serving
                      both Quarters 10 and 11 should be located near the south side of Quarters 10. Records
                      also show a water service valve near the main in the front yard of Quarters 10, and a
                      valve near the outside wall of each house. The record drawings show an additional valve
                      on the main line in front of Quarters 11. A water valve box was found in the field in the
                      front yard of Quarters 10 positioned consistent with a valve on the main (not on a
                      service). A possible inference is that this was installed instead of the main line valve
                      shown on the drawings in front of Quarters 11. A valve box for the shared service line was
                      field located near the main between the building fronts. A third valve box was found where
                      the service enters the north side of Quarters 11, but no equivalent valve box was found
                      for Quarters 10. A fourth metal subsurface feature with a broken top/cap was found in the
                      front yard between the two Quarters. It’s size, material, and position could be consistent
                      with that of a valve box, but its function could not be identified.
               •      Quarters 12 and 13: the valves for the primary service line between Quarters 12 and 13,
                      and for the individual service branch at the south face of Quarters 12 were found in the
                      field (in addition to the operating valve for the fire hydrant between the buildings), but the
                      corresponding service valve for Quarters 13 was not.
               •      Quarters 14 and 15: GIS and record drawings indicate that a single water service line
                      serving both Quarters 14 and 15 should be located roughly between the two buildings,
                      with a primary service valve near the main in the front yard and a valve near the outside
                      wall of each house. A valve box for the shared service line was field located near the main
                      between the building fronts, and a valve box was found where the service enters the
                      north side of Quarters 15, but no corresponding valve box was found for Quarters 14. A
                      third valve box found in the yard southeast of Quarters 15 might be on the main, though
                      its position would be more consistent with a valve on a service line.

2.1.1.1.4 Sewer
               Utility record drawings prepared by STV/Lyon Associates dated August 1994, and GIS utility
               maps provided by the installation were consulted and found to be generally, but not
               completely, consistent with field observations.

               The records indicate that the quarters in Group 01 are served by an 8-inch clay sanitary sewer
               collector main running in the front yards of the buildings parallel to 2nd Avenue. This collector
               drains northward, turning east at a manhole in front of Quarters 11, running across the parade
               ground, eventually discharging into the city wastewater system in 2nd Street SW near T Street.
               House sewer services are configured with a single service line between adjacent buildings,
               branching to serve both buildings, e.g., one line between Quarters 11 and 12, branching to
               serve both; one line between Quarters 13 and 14, branching to serve both. The records show
               a single cleanout on the shared service line at the branching point. The exceptions are that
               Quarters 15 is paired on a service line with Building 60, and Quarters 10 is on a shared
               service line with Quarters 9 (which is drained by a different main running toward P Street SW).
               Records indicate that the shared part of the service line is a 6-inch diameter pipe, while the
               individual branches are each 4 inches.

               Quarters-specific issues or deficiencies are noted below:

               •      Quarters 10 through 14: None of the sanitary cleanouts shown on the record drawings
                      between these Quarters could be located during field investigations.
               •      No cleanout was found for Quarters 15, but a direct sanitary service connection from the
                      house to a manhole between the quarters and Building 60 was located.

Prepared for: USACE                                                                                                AECOM
Design Narrative
                                                                                Project reference: JBMHH Family Housing
                                                                                 Solicitation Number – W912DR21BXXXX

2.1.1.1.5 Gas
               Utility record drawings prepared by STV/Lyon Associates dated August 1994, and GIS utility
               maps provided by the installation were consulted and found to be generally, but not
               completely, consistent with field observations.

               The records indicate that the quarters in Group 01 are served by a 10-inch ductile iron (DI)
               main running in the rear yards of the buildings parallel to 1st Avenue. Each quarters is fed by a
               2-inch coated wrapped steel (CWS) service line running from the main to the north side of the
               house, Both sets of records show an exterior shutoff valve on each service line, but none of
               these were located in the field investigations. A gas valve was found in the rear yard of
               Quarters 15, but its position is consistent with a main line valve shown on the drawings, not a
               service line valve. Gas meter assemblies were found in the interior basements of Quarters 10
               and 15, but not in any of the others.

               According to the STV drawings gas service is supplied to Fort McNair by Washington Gas
               (formerly Washington Gas Light Company), but the gas distribution equipment on-post is
               owned and operated by the U.S. Government.

2.1.1.2 Functional and Technical Requirements

2.1.1.2.1 Grading
               Foundation leakage and infiltration were observed in Group 01 Quarters during the interior
               surveys and documented in the Facility Condition Assessment (FCA). Failed grading that
               results in water ponding around and adjacent to the buildings will contribute to this issue.
               Multiple buildings in this group were found with sandbags stacked around the exterior
               basement stairwell indicating a history of surface water flooding. Government direction
               provided during the Programming and Charrette meetings in November and December 2020
               and documented in the Programming Findings agreed with AECOM’s recommendation for
               minor regrading of the lots to direct runoff away from the buildings as part of the foundation
               repair and waterproofing process. This perimeter excavation will require the reconstruction of
               sidewalks and patios within the limits of disturbance.

2.1.1.2.2 Stormwater
               As part of the response to the foundation leakage issues discussed above, Government
               direction provided during the Programming and Charrette meetings in November and
               December 2020 and documented in the Programming Findings agreed with AECOM’s
               recommendation to connect all downspouts and basement sump pumps to underground drain
               pipes to convey drainage away from the structures as part of the foundation repair and
               waterproofing process.
               The Group 01 quarters are not within the limits of a delineated 100-year floodplain; however,
               exterior excavation proposed to remedy foundation leaks could trigger requirements under
               DC’s Department of Energy & Environment (DOEE) erosion and sediment control (ESC) and
               stormwater management (SWM) regulations. The extent of the measures required is based on
               the combination of total land disturbance for all quarters and the ratio of cost of improvements
               vs. replacement. AECOM anticipates that the cost of improvements for the Base Bid will likely
               exceed 50% of the total value of the houses, which would place the project in a category of
               SWM requirements that is more stringent than the minimum under DC regulations. Design for
               SWM requirements is being evaluated and will provide bio-retention facilities behind each
               Quarter towards 1st Avenue. The bio-retention areas are designed to collect as much of the
               roof leaders, sidewalks, and patio runoff at each Quarters as feasible. An underdrain will be
               provided for each bioretention basin to outfall at 1st Avenue. The Design Team has had several
               discussions with DOEE about the stormwater retention volume requirements that cannot be
               met with the bioretention basins behind the Group 01 quarters. Additional offsite stormwater

Prepared for: USACE                                                                                            AECOM
Design Narrative
                                                                                   Project reference: JBMHH Family Housing
                                                                                    Solicitation Number – W912DR21BXXXX

               management areas will be investigated with DPW Environmental to plan for providing
               stormwater credit for these quarters and other upcoming quarters construction.

2.1.1.2.3 Water
               For the buildings in this group water services are configured with a single service line between
               adjacent buildings, branching to serve both buildings. Some water service shutoff valves
               depicted in record documentation could not be located by field efforts indicating a condition
               wherein water service to an individual quarters could not be turned off for repairs without
               potentially requiring the shutoff of one or more neighboring units. Government direction
               provided during the Programming and Charrette meetings in November and December 2020,
               and in the response to RFI 0034 agreed with AECOM’s recommendation to install new shutoff
               valves on those service lines where an existing valve in good working order cannot be found
               (Quarters 10, 13, and 14). This work is included as part of Bid Option 5, not under the Base
               Bid.

2.1.1.2.4 Sewer
               House sewer services for the quarters in this group are configured with a single service line
               between adjacent buildings, branching to serve both buildings. Sanitary cleanout stacks
               depicted in record documentation could not be located by field efforts indicating a condition
               wherein maintenance to an individual quarters requiring interruption of service could not be
               done without potentially disabling service for one or more neighboring units. Government
               direction provided during the Programming and Charrette meetings in November and
               December 2020 and documented in the Programming Findings agreed with AECOM’s
               recommendation that due to the preferred location of sanitary cleanouts within a few feet of a
               building’s exterior wall, it would be cost effective to install individual cleanouts on the separate
               service lines (one for each house) as part of the foundation repair and waterproofing process.
               This work will be done under the Base Bid.

2.1.1.2.5 Gas
               For the buildings in Group 01 gas service shutoff valves depicted in record documentation
               could not be located by field efforts which indicates a potential life/health/safety issue, because
               in the event of an emergency it may be necessary to enter the building to shut off the gas
               service. This condition was not addressed directly for the Group 01 quarters during the
               Programming and Charrette meetings in November and December 2020; however, for
               consistency with Government direction provided for the Group 15 and 16 quarters, and in the
               response to RFI 0035, AECOM includes installation of new shutoff valves on all six service
               lines (Quarters 10 – 15) under the Base Bid .

               See the Plumbing Section 2.1.6 for additional details.

2.1.1.3 Calculations
               Calculations will be provided on the design drawings and initial DOEE stormwater
               management spreadsheets will be provided in a calculation appendix.

Prepared for: USACE                                                                                               AECOM
Design Narrative
                                                                                  Project reference: JBMHH Family Housing
                                                                                   Solicitation Number – W912DR21BXXXX

2.1.2 Landscape Architecture
2.1.2.1 Existing Conditions
               The Group 01 buildings (10-15) or Generals’ Quarters are located between 2nd Avenue to the
               west and to 1st Avenue to the east and run parallel to the Washington Channel of the Potomac
               River. These buildings were built in the early 20th century as part of the 1903 Beaux Arts
               master plan by the architectural firm of McKim Mead and White. While the buildings were
               designed to frame the vista down the quadrangle to the War College Building (61), it is unclear
               whether the landscape design for the Group 01 Quarters was original to the design. Mature
               trees line both 1st Avenue, characterized by White Oaks and Willow Oaks, and much of 2nd
               Avenue, characterized by Red Maples. The exception is Quarters 15 where the 2nd Avenue
               frontage features Crape Myrtles instead of Red Maples, a significant difference in the scale,
               shape, and color of the street trees. The eastern 2/3 of the site slopes towards 1st Avenue and
               the seawall of the Washington Channel. The western 1/3 of the site slopes more gradually
               towards 2nd Avenue. The houses are sited on the ridge dividing the eastern and western
               portions of the site. While the grading is mostly consistent, depressions, swales, and divots
               occur in several locations throughout the site.

                      Photo 4 - Quarters 13 View from 2nd Avenue   Photo 5 - 2nd Avenue Featuring Tree Line of Red
                                                                                Maple (Acer rubrum)

               Each landscape in Group 01 is characterized by three zones: the open perimeter, the
               enclosed patio, and the rear yard.

               The open perimeter contains walkways, light posts, turf, specimen plants, and screening
               plants. Walkways in the perimeter appear to be well maintained with a few noticeable cracks
               and some incidental spalling. Concrete and stone surfaces under the house gutters are often
               stained by copper, most likely from the gutters, and occasionally by rust, most likely from the
               integrated railings. Entry to the basement from the exterior of the building is typically from the
               northwest of the building, east of the northwest walkway. Light posts and signage appear to be
               well maintained. Plantings are unique to each building. Screening plants do not consistently
               screen the foundations of the quarters but generally appear to be in good condition. Turf
               appears well maintained but the soil beneath appears to be severely compacted at places.
               Although the lawn surface does not appear to be eroding or holding water, observation during
               a rain event showed that soils do not allow water to infiltrate well.

Prepared for: USACE                                                                                              AECOM
Design Narrative
                                                                                                  Project reference: JBMHH Family Housing
                                                                                                   Solicitation Number – W912DR21BXXXX

                        Photo 6 - Quarters 12 North Walkway                  Photo 7 - Quarters 15 Exterior Stair to Basement

               The enclosed patio features fences, fence screening plants, foundation screening plants,
               specimen plants, and a cast-in-place terrace. The treatment and shape of the terrace is
               different for each building. However, the buildings’ planting layout and grading solution seem
               generally consistent.

                   Photo 8 – View of the Exterior of the Enclosed Patio to    Photo 9 - Enclosed Patio to the South of Quarters 12
                                          the East                             (typical) Featuring White Cedar (Thuja occidentalis)
                                                                                                     Screen

                        Photo 10 - Quarters 10 Enclosed Stone-Set-In-          Photo 11 - Enclosed Patio to the North of Quarters 15
                                    Concrete Patio Surface

Prepared for: USACE                                                                                                              AECOM
Design Narrative
                                                                                         Project reference: JBMHH Family Housing
                                                                                          Solicitation Number – W912DR21BXXXX

               Fence footings are often exposed and show signs of deterioration. The treatments of the edge
               differ for each building. Foundation screening plants are inconsistent; an analysis of the
               original desired planting plan would be of benefit to further evaluate their historic relevance.
               Otherwise, those specimen plants seem to be in good condition.

                   Photo 12 – Exposed Footing and Missing Expansion    Photo 13 – Liriope and Hydrangea Foundation
                             Joint at Quarters 11 East Gate            Plantings within Enclosed Patios of Quarter 12

               The front yard has a lawn area, street trees, lamp posts, and occasionally foundation planting
               at each building. The perimeter is intermittently planted with Liriope and Holly at the base of
               the buildings. Those landscape elements are in good condition.

                    Photo 14 – Front Yard Specimen Holly Tree (Ilex   Photo 15 – Front Yard Walkway Border Plantings
                                  opaca) Quarters 11                                  at Quarters 12

               The rear yard has a large turf area, street trees, lamp posts, and occasionally screening plants
               along the base of the perimeter of the building. Turf grass appears dry, especially near
               walkways. Lamp posts along 1st Avenue are of a different color and style than those along 2nd
               Avenue. Holly and intermittent Liriope screen the base of the building; it appears to be in good
               condition.

Prepared for: USACE                                                                                                     AECOM
Design Narrative
                                                                                           Project reference: JBMHH Family Housing
                                                                                            Solicitation Number – W912DR21BXXXX

               Photo 16 - Tree Line along First Avenue   Photo 17 -Screening Plants for Rear   Photo 18 -Screening Plants for Rear
                                                            Quarters 15 (Taxus baccata)            Quarters 10 (Ilex aquifolium)

2.1.2.2 Functional and Technical Requirements
               Demolition as part of the work includes removal of plants, turf, soil, and hardscape to facilitate
               foundation work. Soil is stored at a location that does not interfere building modifications, site
               modifications, or movement around the site, Trees are isolated from construction activity and
               protected from injury. For the base bid, pavement and hardscape removal are primarily
               around the perimeter of the quarters, though removal may occur in other locations in order to
               implement the proposed design. For Bid Option 1 additional turf and landscape elements are
               removed to the south of quarters 15 to provide a patio area comparable to those of the other
               Group 01 quarters. For Bid Option 2 undesirable plants and all exterior hardscape associated
               with the quarters are removed so that new concrete will match in quality and aesthetics.

               The design includes stormwater features, hardscape amendments, and required regrading of
               the site. The Base Bid scope incorporates provisions for tree preservation, the restoration of
               plantings and fencing in areas affected by construction activities, and the proposed stormwater
               and bioretention landscape. Bid Option 1 includes extended concrete surfaces, screening for
               mechanical units to the north of the quarters, and patio space to the south for Quarters 15.
               The Bid Option 2 scope replaces and repairs landscape and hardscape elements throughout
               the entirety of the sites. As they are removed, invasive and undesirable plant species are
               replaced with plants recommended in the Installation Design Guide (IDG). The landscape,
               hardscape, and other site elements proposed support and reinforce the building design
               concept, promote the pedestrian environment, enhance the occupant experience, conform to
               applicable physical security guidelines, and meet the requirements of the IDG. The design
               performs without permanent irrigation systems. Temporary irrigation may be used during the
               establishment period for plants.

Prepared for: USACE                                                                                                       AECOM
Design Narrative
                                                                                 Project reference: JBMHH Family Housing
                                                                                  Solicitation Number – W912DR21BXXXX

2.1.3 Structural
2.1.3.1 Existing Conditions
               The Group 01 Quarters including Quarters 10 through 15 are three level single family quarters
               with full basements. The Quarters were constructed between 1903 and 1905 with exterior load
               bearing brick masonry walls and wood bearing walls and joists in the interior. Each home has
               a two-level enclosed porch at the rear of the building which includes a concrete slab at the first
               level and wood framing for the remainder of the floor, wall, and roof construction. The exact
               configuration of the structural framing is not known due to the absence of original construction
               documents.

               A limited structural survey was conducted by AECOM in June, July, and August 2020 to
               observe the building conditions and deficiencies identified in the Facilities Condition
               Assessment (FCA). The FCA was based on findings from surveys conducted in early 2018.
               The FCA, DD Form 1391, and Course of Action (COA) documents outlined the deficiencies in
               each building and the remediation requirements.

               A geotechnical investigation of the soils and sub surface bearing conditions was
               recommended in the FCA for all Group 01 Quarters including Quarters 10 through 15. The
               FCA identified exterior masonry wall cracks, uneven floors, water infiltration though the
               foundation walls and slab, and basement slab cracks which may be an effect of building
               settlement. A previous structural engineering study and a geotechnical investigation were
               prepared for Quarter 6 in 2011 and 2012 respectively. The geotechnical recommendations for
               Quarter 6 included foundation remediation at that time.

               The condition of the structural framing was observed where visible during the site surveys and
               the deficiencies reported in the FCA were confirmed by AECOM. Cracks in the basement slab,
               masonry wall cracks, and water infiltration were observed to be typical for all Group 01
               Quarters.

               The rear enclosed porches have deficiencies including uneven floors and deterioration of the
               first level concrete framing. Where the concrete framing was exposed to view cracks, spalls,
               and corroded reinforcement were common throughout the Group 01 Quarters. Longitudinal
               cracks were observed on the underside of the perimeter concrete beams at Quarters 12.
               Cracks and out of plane movement were observed in the brick masonry foundation wall and
               piers supporting the porch framing. Observed conditions of the second-floor porch framing
               included unevenness and sloped framing but were not consistent among Group 01 Quarters.
               The rear porches were enclosed after the original construction and the variations between
               buildings may have resulted from different approaches to renovations over time.

2.1.3.2 Functional and Technical Requirements
               In accordance with UFC 4-711-01, the building code criteria applicable to detached one and
               two-family dwellings not more than three stories in height above grade will comply with all
               sections of the International Residential Code (IRC) 2018 and reference codes and standards.
               Design elements beyond the limits of applicably for IRC will comply with IBC, UFC, and the
               reference standards of each. The Design Criteria loads were developed for the controlling
               code loads. The IRC design wind velocity controlled over the UFC criteria and is used for the
               Design Criteria. The UFC seismic ground motion values were used for the Design Criteria.

               In accordance with UFC 4-010-01 (12 December 2018) DoD Minimum Antiterrorism Standards
               for Buildings, low occupancy family housing with 12 units or fewer are exempt from the
               requirements of the UFC 4-010-01 standard.

Prepared for: USACE                                                                                             AECOM
Design Narrative
                                                                                 Project reference: JBMHH Family Housing
                                                                                  Solicitation Number – W912DR21BXXXX

               In accordance with UFC 3-301-01 (1 October 2019) Structural Engineering, buildings in
               Seismic Design Category B are exempt from the requirements for the seismic evaluation and
               retrofit of existing buildings in the UFC 3-301-01 standard.

               Design Criteria:

                      Ground Snow Load: 25 psf

                      Wind Speed: 115 mph (ultimate) per the IRC 2018

                      Seismic Data:

                             Site Class: D

                             Ss: 0.133g

                             S1: 0.043g

                             Sds: 0.143g

                             Sd1: 0.069g

                             Seismic Design Category: B

               A geotechnical engineering study has been conducted by AECOM for the Group 01 Quarters.
               The findings and recommendations of the geotechnical investigation for the Group 01
               Quarters included remediation measures of the foundations. The 2012 Quarter 6 geotechnical
               investigation recommended the installation of helical piers approximately 25 feet long and
               spaced at 5 feet maximum along bearing walls to arrest building settlement and provide new
               foundation bearing. All new foundations in the Group 01 Quarters will be supported by helical
               piers including the rear porches. The size, layout, and depth of the helical piers will be
               determined by the helical pier delegated design engineer. Based on preliminary findings from
               the borings and consultation with helical pier vendors the typical pier length is anticipated to be
               40 feet. Helical piers up to 55 feet may be required based on the foundation loads and soil
               conditions.

               The structural scope includes repairs to the deficiencies identified in the FCA and the AECOM
               site survey along with new design elements related to the renovation of the Group 01
               Quarters. Remediation of the foundation will be coordinated with architecture to include
               masonry repairs and waterproofing of the exterior basement walls. Exterior foundation
               drainage and under slab drainage will be installed at each quarters. The basement slab-on-
               grade will be demolished and replaced at each Group 01 quarters. Enlargement of the door
               opening between the master bedroom and the adjacent room will be coordinated with
               architecture as part of Bid Option 1. Mechanical openings through the existing structural
               framing will be coordinated with mechanical where required as part of Bid Option 1.
               Supplemental framing will be provided where equipment weights exceed the capacity of the
               existing floor joists.

               Due to the existing conditions and the use requirements, the rear porches will be removed and
               replaced at each of the Group 01 Quarters. Replacement of the exterior porch will be designed
               to replicate the existing construction including a concrete slab and beam system at the first
               level and wood floor and wall framing for the level two and roof structure. Details of the new
               porch structure will be coordinated with the architectural requirements.

2.1.3.3 Calculations
               Calculations can be found in Appendix B.

Prepared for: USACE                                                                                             AECOM
Design Narrative
                                                                                          Project reference: JBMHH Family Housing
                                                                                           Solicitation Number – W912DR21BXXXX

2.1.4 Architecture
               Group 01 quarters in this scope of work includes Quarters 10, 11, 12, 13, 14 and 15. The
               quarters are located at the south end of Group 01, fronting Second Avenue, and overlooking
               First Avenue and the Washington Channel. The residences were constructed as single-family
               officer homes from plans dated 1902.

               The Fort McNair Historic District was listed on the National Register of Historic Places in 1975.
               All residences, including Group 01, contribute as cultural resources under Criterion C as they
               retain historic integrity of their planning and design by McKim, Mead and White. They are not,
               however, individually or as a group listed structures. Based on this location the Installation
               Design Guide places the quarters within the Historic District Theme.

               McKim, Mead and White chose Colonial Revival as the design style for the houses at the then
               newly planned Army War College, now known as Fort McNair. Common features and elements
               of this style include symmetry, double hung windows, pitched roofs with dormers, columned
               front porches, and shaped white trim on 3-bay or 5-bay plan configurations with either a brick
               or horizontal wood siding envelope. The quarters employ all these elements using a 3-bay
               configuration and brick envelope.

               Photo 19 Group 01 Quarters                         Photo 20 - Historic NARA Photograph circa WWII

               Photo 21 – Quarters 12 - Typical Front Elevation         Photo 22 – Quarters 10 - Typical Rear Elevation

2.1.4.1 Existing Conditions
               Fort McNair Quarters 10, 11, 12, 13, 14 and 15 were surveyed in April (Quarters 13), August,
               September, October, and November 2020. The exterior and interior of all the houses are in

Prepared for: USACE                                                                                                       AECOM
Design Narrative
                                                                                       Project reference: JBMHH Family Housing
                                                                                        Solicitation Number – W912DR21BXXXX

               acceptable to good condition with noted exceptions and exhibit a range of apparent or nearly
               original and new architectural elements and finishes.

               Information described below has been gathered through original drawings limited to a few floor
               plans and several structural plans and sections, dimensioned plans dated September 1997,
               direct observation, historical photographs, and the previous Facility Condition Assessments
               dated April 2019. Renovation, repair, or remodeling drawings delineating changes over time
               are not available for review. No intrusive exploration has been conducted at the time of this
               report for these specific quarters however an intrusive survey of Group 01 Quarters 4 was
               conducted in June 2020; as Quarters 4 is substantially similar to these quarters, it can be
               assumed that conditions uncovered during that investigation are similar to Quarters 10 -15.

2.1.4.1.1 Masonry
               Based on observations of the interior basement walls, the exterior envelope appears to be
               multiple wythes of masonry with an interior plaster finish. Although plaster with expanded
               metal on wood lath is visible on certain interior basement ceilings and walls, intrusive surveys
               of the first floor of Quarters 4 indicates plaster directly applied to the inside face of the exterior
               wall.

               The red brick masonry envelope is set in a Flemish bond with random darkened headers. The
               brick is of atypical size, 8 ¼” true length with three courses equaling 8 ¼”. Header brick is 4 ¼”
               in true width and this is assumed to equal the depth of one wythe. A unique two step water
               table comprised of one row of soldier brick projecting approximately one inch, then another
               offset of running bond below, both with a flat top, accents the ground plane. The corner of the
               soldier course is executed as three courses, alternating one stretcher and one header. Brick
               lintels are constructed as flat arches on the first and second levels and a shallow curve arch at
               the basement.

               Photo 23 – Quarters 14 Two–step Water Table        Photo 24 -Quarters 10 First Floor Lintel with Projecting Key

               The first-floor lintels are further delineated with a keystone of 5 splayed vertical bricks that
               extends approximately one course above and one inch below the adjacent brick while also
               projecting outward approximately one inch.

               The mortar joints are struck grapevine joints, with the edges proud of the adjoining brick.
               Mortar bed joints are dilapidated in some areas and corrective repointing will be required.

               The exterior masonry wall, although the outer brick wythe is crazed and fissured, appears to
               be weathertight with no visible leaking on the interior face.

Prepared for: USACE                                                                                                   AECOM
Design Narrative
                                                                                           Project reference: JBMHH Family Housing
                                                                                            Solicitation Number – W912DR21BXXXX

                                                        Photo 25 – Quarters 14 Flemish Bond
                                                        Brickwork with Darkened Headers

               Brick walls with stone treads are utilized at the front and north side stairs as well as the stair
               leading to the basement through the underside of the rear sunroom. The front grand stair has
               two runs leading to a top landing one step below the front porch and symmetrical to the front
               door. At the front and side stairs, the stone treads comprise both the tread and the riser, offset
               as needed for the tread width. The front and side stairs treads are worn but are serviceable
               and show the historic nature of the quarters. The brick walls are generally in good condition
               with minimal isolated cracking and deteriorating mortar. The basement stairs are in poor
               condition and must be replaced.

              Photo 26 - Quarters 10 Front Stair                                                      Photo 27 - Quarters 11 Rear
                                                                                                      Basement Stone and Brick
                                                                                                      Steps

             Photo 28 - Quarters 10 Front Step Detail               Photo 29 - Quarters 15 North (Office) Stair

2.1.4.1.2 Wood
               Historic exterior wood is employed for brickmoulds and eave fascias created from various
               moldings and banding trim. Wood is also employed as pilasters, ceiling finish, and cornice at
               the front porch. The rear porch envelope is primarily wood with various wood banding,
               beadboard siding, and its cornice.

Prepared for: USACE                                                                                                       AECOM
Design Narrative
                                                                                       Project reference: JBMHH Family Housing
                                                                                        Solicitation Number – W912DR21BXXXX

               Roof Fascia

               Roof eaves comprise a frieze board with a cove molding leading to a small soffit. The soffit is
               framed by a vertical fascia board and another cove molding ending at the roof edge. A distinct
               feature of the soffit is the bed-mould dentils. These shallow square blocks each have 9 circular
               holes. The soffit extension conceals the box gutter above. General eave condition is good and
               minimal repair and refinishing work is required.

               Front Porch

               The predominant feature of the front entry are six double story columns supporting an
               entablature and cornice. The columns are based on the Roman Doric order with an additional
               indented narrow oval pattern circling the necking. The columns have entasis and are equally
               spaced except the center opening framing the front entry door is slightly wider. Sounding and
               visible seams in the columns indicate a modern synthetic material such as fiberglass or glass
               fiber reinforced concrete. The base is of the same material. Flat Doric pilasters, of wood, are
               set on the brick aligned with the corner columns.

               The entablature spans the full width and depth of the porch. The frieze utilizes a large convex
               profile set between two bands of running coved trim. A distinct feature of the cornice is the
               bed-mould dentils which continues that of the eave soffit.

              Photo 30 - Quarters 15 Column Capital   Photo 31 – Quarters 15 – Eave Bed-mould Dentil
              and Bed-mould

               Photo 32 - Quarters 11 Balustrade

Prepared for: USACE                                                                                                   AECOM
Design Narrative
                                                                                         Project reference: JBMHH Family Housing
                                                                                          Solicitation Number – W912DR21BXXXX

               A balustrade sits atop the porch cornice and consists of a pair of vertical posts aligned with the
               columns below bracketing a custom staff. Between the paired posts is an inset rectangle within
               a diagonal motif design. This wood detail has been well maintained and will need only minimal
               work.

               The porch deck comprises brick pavers set in a herringbone pattern on a concrete slab. As
               visible below, the slab is supported on pilasters and corbelled brick. The porch ceiling is
               painted tongue and groove wood.

               Porch railings, including those on the entry steps, are vertical picket painted metal with a
               traditional profile molded top rail. Brass urn finials adorn the posts at the top and bottom of the
               entry stair, although at some Quarters these are missing.

               Rear Porches

               Typical in warm climates, a two-story porch sometimes referred to as a “sleeping porch” was
               erected at the rear of each house. Based on level change from the interior to the porch and as
               shown on 1906 plans, these now enclosed rooms were likely open and perhaps at one time
               screened. Today, windows have been inserted between rectangular columns with a knee wall
               below, the thin wall below does not seem to be insulated. The exterior finish is an assembly of
               the wood columns, wood cornice, wood window casing, wood skirting and vertical wood bead
               board paneling under the windows. The wood cornice, encasing a concealed gutter, continues
               and aligns with the cornice and gutter assembly on the primary brick volume. Quarters 10’s
               concrete beams and brick piers are severely deteriorating. Refer to structural narrative for
               further analysis of structural deficiencies.

               Photo 33 – Quarters 10 Rear Porch from Northwest

                   Photo 34 - Quarters 12 Rear Porch Photo 35 - Quarters 13 Rear Porch
                   Beadboard and Windows             South Elevation

Prepared for: USACE                                                                                                     AECOM
Design Narrative
                                                                                   Project reference: JBMHH Family Housing
                                                                                    Solicitation Number – W912DR21BXXXX

               Dormers

               Six dormers provide light to the attic level: three facing the front and three to the rear. The front
               dormers reflect the pattern of the duplexes located on the opposite side of the Parade Ground,
               with two triangular gable fronts bracketing a half round gable. All three rear dormers use the
               triangular gable design. While the front gable face comprises a wood, double hung window
               surrounded by wood casing and the wood gable panel, the sides and roof of the dormers are
               clad in slate roofing tiles.

               Photo 36 – Quarters 14 Front Dormers

                   Photo 37 – Quarters 14 Rear Dormers

2.1.4.1.3 Windows, Louvers and Exterior Doors
               Replacement windows have been installed through-out. Windows are wood residential
               simulated divided lite with insulated glazing set in double hung frames. Typical windows set in
               brick are currently six over six lites. Special tall windows above the front door are nine over six
               lites. Another tall window brings light to main stair landing, these windows are fixed, with a
               unit of twelve lites above a unit with nine lights connected by a fix mullion. At Quarters 14, this
               window is a true double hung with a twelve over nine lite configuration.

Prepared for: USACE                                                                                               AECOM
Design Narrative
                                                                                    Project reference: JBMHH Family Housing
                                                                                     Solicitation Number – W912DR21BXXXX

               Photo 38 - Quarters 14 First Floor Window with       Photo 39 – Quarters 11 First Floor Window
               Original Casing                                      with Aluminum Overcasing

               Photo 40 – Quarters 14 Front Door,               Photo 41 – Quarters 14 Front Door, Center Hall, and
               Center Hall, and Stair Landing Windows           Stair Landing Windows

Prepared for: USACE                                                                                                AECOM
Design Narrative
                                                                                   Project reference: JBMHH Family Housing
                                                                                    Solicitation Number – W912DR21BXXXX

                                                                        Photo 43 – Quarters 11 Pantry Clerestory
                                                                        Window

              Photo 42 – Quarters 10 First Floor Bath Original Window   Photo 44 – Quarters 14 Basement Window

              Photo 45 - Quarters 10 Rear Porch Windows

Prepared for: USACE                                                                                               AECOM
Design Narrative
                                                                                       Project reference: JBMHH Family Housing
                                                                                        Solicitation Number – W912DR21BXXXX

               The rear porch windows are set in wood framing. These are also simulated divided lites with a
               six over six muntin pattern. At the first floor, a fixed row of clerestory windows sits above the
               double hung windows, with mullions and framing that align.

               Generally, in masonry wall locations, an aluminum canted flat casing appears to have been
               placed over or substituted for a wood casing on the side elevations while the presumed
               original wood curved, echinus casing has been maintained on the front façade. The small, high
               window in the first-floor toilet room has not been replaced in the most recent window
               replacement work and may be original. The condition of the original wood casing, behind the
               aluminum trim is unknown.

               Photo 46 – Quarters 11 Assumed Original Casing                Photo 47 – Quarters 11 Aluminum Overcasing
               The front doors appear to be recent wood
               replacement doors, with a single glazed lite above a traditional raised panel. The doors are
               wide, with an overall size of 3’-6” by 7’-0” high. The wood echinus casing and tripartite divided
               lite transoms appear to be original or near original. The number of each Quarters is stenciled
               in the transom, gold with a shadow black outline. A full single lite modern aluminum storm door
               is attached to the frame. This assembly will be protected in place and refinished.

                                                           Photo 49 – Quarters 15 Front Door Transom

               Photo 48 – Quarters 12 Front Door

Prepared for: USACE                                                                                                   AECOM
You can also read