Hilti KWIK HUS-EZ I (KH-EZ I)
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Hilti KWIK HUS-EZ I (KH-EZ I) Internally Threaded Carbon Steel Screw Anchor Supplement to Hilti North American Product Technical Guide Volume 2: Anchor Fastening Technical Guide 2011 Edition
Mechanical Anchoring Systems
3.3.5 KWIK HUS-EZ I (KH-EZ I) Carbon Steel Screw Anchor
3.3.5.1 Product Description 3.3.5.1 Product Description
3.3.5.2 Material Specifications Hilti KWIK HUS-EZ I (KH-EZ I) anchors • Thread design enables quality
3.3.5.3 Technical Data are comprised of a body with an setting and exceptional load
internally threaded hex washer head. values in wide variety of base
3.3.5.4 Installation Instructions
material strengths.
The anchor is manufactured from
3.3.5.5 Ordering Information • Anchor is fully removable
carbon steel and is heat treated.
It has a minimum 0.0003 inch (8 μm) • Anchor size is same as drill
bit size and uses standard
zinc coating in accordance with
ANSI B212.15 – 1994 drill bits.
DIN EN ISO 4042. The internally
• Suitable for reduced edge
threaded head is larger than the distances and spacing.
diameter of the anchor and is formed
with serrations on the underside. The 3.3.5.2 Material
anchor body is formed with threads Specifications
running most of the length of the Hilti KWIK HUS-EZ I anchors are
anchor body. The anchor is installed in manufactured from carbon steel.
a predrilled hole with a powered impact The anchors are bright zinc plated to
wrench or torque wrench. The anchor a minimum thickness of 8µm.
threads cut into the concrete on the
sides of the hole and interlock with
3.3.5.3 Technical
the base material during installation.
Data
Applicable base materials include The data contained in Tables 1-4 of
normal-weight concrete, structural this section have been evaluated in
lightweight concrete and lightweight accordance with AC 193. For more
concrete over metal deck. detail, see ICC-ES ESR 3027.
Guide Specifications Figure 1 — KWIK HUS-EZ I anchor
installation details
Screw anchors shall be
KWIK HUS-EZ I as supplied by
Hilti, Inc. Anchors shall be
Listings/Approvals manufactured from heat treated
ICC-ES (International Code Council) carbon steel material, zinc plated to a
ESR-3027 minimum thickness of 8µm. Anchors
(Cracked & Uncracked Concrete)
FM Approved shall be installed using a drill bit of
same nominal diameter as anchor.
Product Features
• Suitable for cracked and
Independent Code Evaluation uncracked normal weight
IBC® / IRC® 2009 (AC 193 / ACI 355.2) and lightweight concrete, and
IBC® / IRC® 2006 (AC 193 / ACI 355.2) lightweight concrete over
IBC® / IRC® 2003 (AC 193 / ACI 355.2) metal deck.
• Suitable for seismic and
nonseismic loads.
• Quick and easy to install.
2 Hilti, Inc. (US) 1-800-879-8000 | www.us.hilti.com I en español 1-800-879-5000 I Hilti (Canada) Corp. 1-800-363-4458 I www.hilti.ca I Anchor Fastening Technical Guide 2011Mechanical Anchoring Systems
KWIK HUS-EZ I (KH-EZ I) Carbon Steel Screw Anchor 3.3.5
Table 1 – KWIK HUS-EZ I (KH-EZ I)
Design Guidelines For KWIK HUS-EZ I1
Values for Normal Weight and Lightweight Concrete
Characteristic Symbol Units Value
Internal Thread Diameter of Head dit in. 1/4 or 3/8
Wrench Socket Size ws in. 3/8 or 1/2
Nominal Diameter da in. 1/4
Drill Bit Diameter dbit in. 1/4
Maximum Installation Torque4 Tinst,max ft-lbf 18
Maximum Impact Wrench Torque Rating3 Timpact,max ft-lbf 114 137
Minimum Nominal Embedment Depth hnom in. 1 5/8 2 1/2
Minimum Hole Depth hhole in. 2 2 7/8
Critical Edge Distance2 cac5 in. 2.00 2.78
Minimum Spacing at Critical Edge Distance smin,cac5 in. 1.50
Minimum Edge Distance cmin5 in. 1.50
Minimum Spacing at Minimum Edge Distance smin5 in. 3.0
Minimum Concrete Thickness hmin in. 3.25 4.125
Anchor Category 3 1
Steel Strength in Tension (ACI 318 D.5.2)
Tension Resistance of Steel Nsa lb. 6,070
Reduction Factor for Steel Strength Φsa - 0.65
Concrete Breakout Strength in Tension (ACI 318 D.5.2)
Effective Embedment Depth hef in. 1.18 1.92
Effectiveness Factor - Uncracked Concrete Kuncr - 24
Effectiveness Factor - Cracked Concrete Kcr - 17
Modification Factor for cracked and uncracked concrete Ψc,N - 1
Reduction Factor for Concrete Breakout Strength Φcb - 0.45 0.65
Pullout Strength in Tension (ACI 318 D.5.3)
Characteristic pullout strength, uncracked concrete (2500 psi) Np,uncr lb. 13056 23587
Characteristic pullout strength, cracked concrete Np,cr lb. 6676 11667
Reduction Factor for pullout strength Φp - 0.45 0.65
Characteristic Pullout Strength, Seismic (2500 psi) Np,eq lb. 5346 11667
Reduction Factor for pullout strength Φeq - 0.45 0.65
Values for Installation in the underside of Concrete-Filled Profile Steel Deck Assemblies2
Pullout Resistance, (uncracked concrete) - Lower Flute Np,deck,uncr lb. 12108 18759
Pullout Resistance, (uncracked concrete) - Upper Flute Np,deck,uncr lb. 14908 19609
Pullout Resistance, (cracked concrete and seismic loads) - Lower Flute Np,deck,cr lb. 6208 9309
Pullout Resistance, (cracked concrete and seismic loads) - Upper Flute Np,deck,cr lb. 7608 9759
1 The data presented in this table is to be used in conjunction with the design criteria of ACI 318 Appendix D.
2 For installations through the soffit of steel deck into concrete, anchors installed in the lower flute may be installed with a maximum one inch offset in either direction
from the center of the flute.
3 Because of variability in measurement procedures, the published torque of an impact tool may not correlate properly with the above setting torques. Over-torquing
can damage the anchor and/or reduce its holding capacity.
4 Tinst,max applies to installations using a calibrated torque wrench.
5 Additional combinations for minimum edge distance, cmin and minimum spacing distance, smin or smin,cac may be derived by linear interpolation between the given
boundary values.
6 The characteristic pullout resistance for concrete compressive strengths greater than 2,500 psi may be increased by multiplying the value in the table by (f'c/2,500)0.3
7 The characteristic pullout for concrete compressive strengths greater than 2,500 psi may be increased by multiplying the value in the table by (f'c/2,500)0.5
8 The characteristic pullout resistance for concrete compressive strengths greater than 3,000 psi may be increased by multiplying the value in the table by (f'c/3,000)0.3
9 The characteristic pullout for concrete compressive strengths greater than 2,500 psi may be increased by multiplying the value in the table by (f'c/2,500)0.5
Hilti, Inc. (US) 1-800-879-8000 | www.us.hilti.com I en español 1-800-879-5000 I Hilti (Canada) Corp. 1-800-363-4458 I www.hilti.ca I Anchor Fastening Technical Guide 2011 3Mechanical Anchoring Systems
3.3.5 KWIK HUS-EZ I (KH-EZ I) Carbon Steel Screw Anchor
Table 2 - Calculated ACI 318-08 Appendix D Strength Design Capacity for Single anchor in Tension3,4,5,6,7
Normal Weight Concrete LWCOMD
2500 PSI1 4000 PSI 3000 PSI2
Internally Nominal
Anchor Uncracked Cracked
Threaded Embedment
Size Concrete Concrete
Head Depth Uncracked Cracked Uncracked Cracked
Seismic Seismic
Concrete Concrete Concrete Concrete Lower Upper Lower Upper
Flute Flute Flute Flute
1/4" 1-5/8" 587 300 240 675 346 277 545 670 280 342
1/4" x 1-5/8"
3/8" 1-5/8" 587 300 240 675 346 277 545 670 280 342
1/4" 2-1/2" 1533 758 758 1940 958 958 1218 1275 605 634
1/4" x 2-1/2"
3/8" 2-1/2" 1533 758 758 1940 958 958 1218 1275 605 634
1 Values for other strengths can be calculated per (f'c/2500)0.3 for 1-5/8" embedment and (f'c/2500)0.5 for 2-1/2" embedment
2 Values for other strength can be calculated per (f'c/3000)0.3 for 1-5/8" embedment and (f'c/3000)0.5 for 2-1/2" embedment
3 Based on single anchor with edge or spacing values greater than those given as critical values in Table 1.
4 Based on lower value of concrete breakout or pullout strength
5 These loads are factored resistance loads in accordance with Chapter 9 of ACI 318-08 (ΦNn).
6 Interpolation of values for other embedments is not permitted
7 Geometric parameters of Table 1 must be followed.
Table 3 – KWIK KWIK HUS-EZ I (KH-EZ I) Allowable Stress Design Values for Illustrative Purposes
Effective Embedment
Internal Thread Diameter Nominal Anchor Diameter Embedment Depth, hnom Allowable Tension Load
Depth, hef
of Head inches inches (mm) lbs (kN)
inches (mm)
1-5/8 (41) 1.18 (30) 470 (2.1)
1/4" or 3/8" 1/4
2-1/2 (64) 1.92 (49) 1340 (6.0)
For SI: 1 inch = 25.4 mm, 1 lbf = 4.45 N.
1 Single anchor with static tension load only.
2 Concrete determined to remain uncracked for the life of the anchorage.
3 Load combinations are taken from ACI 318 Section 9.2 (no seismic loading).
4 40% dead load and 60% live load, controlling load combination 1.2D + 1.6L.
5 Calculation of weighted average for conversion factor α = 1.2(0.4) + 1.6(0.6) = 1.44.
6 f′c = 4,000 psi (27.6 MPa) (normal weight concrete).
7 ca1 = ca2 ≥ cac, see Table 1.
8 h ≥ hmin, see Table 1.
9 Values are for Condition B where supplementary reinforcement in accordance with ACI 318 D.4.4 is not provided.
10 Allowable Tension Load = factored Load (Lessor of Np or Concrete Breakout from Table 1) ÷ 1.44
11 Values are for single anchors installed without influence of base material edge distance or adjacent anchors.
Figure 2 – Installation of KWIK HUS-EZ I (KH-EZ I) in Soffit of Concrete Over Steel Deck Floor and Roof Assemblies
1 A
nchors may be placed in the upper or lower flute of the steel deck profile provided the minimum concrete cover above the drilled hole is
satisfied. Anchors in the lower flute may be installed with a maximum 1-inch offset in either direction from the center of the flute. The offset
distance may be increased proportionally for profiles with lower flute widths greater than those shown provided the minimum lower flute edge
distance is also satisfied.
4 Hilti, Inc. (US) 1-800-879-8000 | www.us.hilti.com I en español 1-800-879-5000 I Hilti (Canada) Corp. 1-800-363-4458 I www.hilti.ca I Anchor Fastening Technical Guide 2011Mechanical Anchoring Systems
KWIK HUS-EZ I (KH-EZ I) Carbon Steel Screw Anchor 3.3.5
Table 4 - KWIK HUS EZ I (KH-EZ I) Allowable Tension Stress Design Values For Installations in Soffit of Concrete Over
Steel Deck Floor and Roof Assemblies
Allowable Tension Load
Internal Thread Diameter Nominal Anchor Diameter Embedment Depth Effective Embedment Depth lbs (kN)
of Head inches (mm) inches (mm) inches (mm)
Upper Flute Lower Flute
1-5/8 (41) 1.18 (30) 466 (2.1) 378 (1.7)
1/4" or 3/8" 1/4
2-1/2 (64) 1.92 (49) 885 (3.9) 846 (3.7)
For SI: 1 inch = 25.4 mm, 1 lbf = 4.45 N.
1 Single anchor with static tension load only.
2 Concrete determined to remain uncracked for the life of the anchorage.
3 Load combinations are taken from ACI 318 Section 9.2 (no seismic loading).
4 40% dead load and 60% live load, controlling load combination 1.2D + 1.6L.
5 Calculation of weighted average for conversion factor α = 1.2(0.4) + 1.6(0.6) = 1.44.
6 f′c = 3,000 psi (27.6 MPa) (light weight concrete).
7 ca1 = ca2 ≥ cac, see Table 1.
8 h ≥ hmin, see Table 1.
9 Values are for Condition B where supplementary reinforcement in accordance with ACI 318 D.4.4 is not provided.
10 Allowable Tension Load = factored Load (Lessor of Np or Concrete Breakout from Table 1) ÷ 1.44
11 Values are for single anchors installed without influence of base material edge distance or adjacent anchors.
3.3.5.4 Installation Instructions
Drill holes in base material using carbide-tipped masonry drill impact wrench or installed with a torque wrench until the
bits complying with ANSI B212.15-1994. The nominal drill bit proper nominal embedment depth is obtained. The impact
diameter must be equal to that of the anchor. The minimum wrench torque, Timpact and installation torque, Tinst for the
drilled hole depth is given in Table 1. Prior to installation, manual torque wrench must be in accordance with Table
dust and debris must be removed from the drilled hole using 1. For member thickness and edge distance restrictions
a hand pump, compressed air or a vacuum. The anchor for installations into the soffit of concrete on steel deck
must be installed into the predrilled hole using a powered assemblies, see Figure 2.
1 2
d0
3x
Drill hole in base material using proper diameter drill bit. Clean drilled hole to remove debris.
3 4
!
Fasten anchor tightly against fastened part. Attach threaded insert.
Hilti, Inc. (US) 1-800-879-8000 | www.us.hilti.com I en español 1-800-879-5000 I Hilti (Canada) Corp. 1-800-363-4458 I www.hilti.ca I Anchor Fastening Technical Guide 2011 5Mechanical Anchoring Systems
3.3.5 KWIK HUS-EZ I (KH-EZ I) Carbon Steel Screw Anchor
The data below is developed from testing performed in accordance with ACI 355.2. It is intended for applications designed
according to CSA A23.3-04 Update No. 3 (August 2009) Design Of Concrete Structures Annex D and is generally suitable for
the conditions described in the introduction of Annex D.
Table 5 – KWIK HUS-EZ I (KH-EZ I) c
Design Guidelines For KWIK HUS-EZ I 1
Values for Normal Weight and Lightweight Concrete
Characteristic Symbol Units Value
Internal Thread Diameter of Head in. 1/4 or 3/8
Wrench Socket Size in. 3/8 or 1/2
Nominal Diameter da in. 1/4
Drill Bit Diameter dbit in. 1/4
Maximum Installation Torque4 Tinst,max ft-lbf (Nm) 18 (24)
Maximum Impact Wrench Torque Rating3 Timpact,max ft-lbf (Nm) 114 (154) 137 (186)
Minimum Nominal Embedment Depth hnom mm 41 64
Concrete material resistance factor Φc - 0.65
Steel material resistance factor Φs - 0.85
Ultimate Strength of anchor steel fut MPa 924
Effective cross-sectional area of anchor Ase mm2 29.0
Minimum Hole Depth hhole mm 51 73
Minimum Spacing at Critical Edge Distance smin,cac5 mm 38
Minimum Edge Distance cmin5 mm 38
Minimum Spacing at Minimum Edge Distance smin5 mm 76
Minimum Concrete Thickness hmin mm 83 105
Anchor Category 3 1
Steel Strength in Tension (CSA A23.3 D.6.1)
Factored Steel Resistance in Tension Nsr kN 15.9
Reduction Factor for Steel Strength R - 0.70
Concrete Breakout Strength in Tension (CSA A23.3 D.6.2)
Effective Embedment Depth hef mm 30 49
Critical Edge Distance2 cac5 mm 51 71
Effectiveness Factor - Uncracked Concrete Kuncr - 10
Effectiveness Factor - Cracked Concrete Kcr - 7
Modification Factor for cracked and uncracked concrete Ψc,N - 1.4
Reduction Factor for Concrete Breakout Strength R - 0.70 1.00
Pullout Strength in Tension - Non Seismic Applications (CSA A23.3 D.6.3}
Factored Pullout Resistance, uncracked concrete (17.23 MPa) Npr,uncr kN 2.66 6.87
Factored Pullout Resistance, cracked concrete (17.23 MPa) Npr,cr kN 1.36 3.47
Concrete Resistance Factor for pullout strength Φc,pull - 0.65
Factored Pullout Strength, Seismic (17.23 MPa) Npr,eq kN 1.16 3.47
Concrete Resistance Factor for pullout strength Φc,seis - 0.65
Values for Installation in the underside of Concrete-Filled Profile Steel Deck Assemblies2
Factored Pullout Resistance, (uncracked concrete 20.68 MPa) - Lower Flute Npr,deck,uncr kN 2.48 5.49
Factored Pullout Resistance, (uncracked concrete 20.68 MPa) - Upper Flute Npr,deck,uncr kN 3.08 5.79
Factored Pullout Resistance, (cracked concrete and seismic loads 20.68 MPa) - Lower Flute Npr,deck,cr kN 1.38 2.79
Factored Pullout Resistance, (cracked concrete and seismic loads 20.68 MPa) - Upper Flute Npr,deck,cr kN 1.58 2.89
1 The data presented in this table is to be used in conjunction with the design criteria of CSA A23.3-04.
2 For installations through the soffit of steel deck into concrete, anchors installed in the lower flute may be installed with a maximum one inch offset in either direction
from the center of the flute.
3 Because of variability in measurement procedures, the published torque of an impact tool may not correlate properly with the above setting torques. Over-torquing
can damage the anchor and/or reduce its holding capacity.
4 Tinst,max applies to installations using a calibrated torque wrench.
5 Additional combinations for minimum edge distance, cmin and minimum spacing distance, smin or smin,cac may be derived by linear interpolation between the given
boundary values.
6 The characteristic pullout resistance for concrete compressive strengths greater than 17.23 MPa may be increased by multiplying the value in the table by (f'c/17.23)0.3
7 The characteristic pullout for concrete compressive strengths greater than 17.23MPa may be increased by multiplying the value in the table by (f'c/17.23)0.5
8 The characteristic pullout resistance for concrete compressive strengths greater than 20.68 MPa may be increased by multiplying the value in the table by (f'c/20.68)0.3
9 The characteristic pullout for concrete compressive strengths greater than 20.68 MPa may be increased by multiplying the value in the table by (f'c/20.68)0.5
6 Hilti, Inc. (US) 1-800-879-8000 | www.us.hilti.com I en español 1-800-879-5000 I Hilti (Canada) Corp. 1-800-363-4458 I www.hilti.ca I Anchor Fastening Technical Guide 2011Mechanical Anchoring Systems
KWIK HUS-EZ I (KH-EZ I) Carbon Steel Screw Anchor 3.3.5
3.3.5.6 Ordering Information
Order Information
Internal Thread Internal Thread Hole Minimum Qty
Description Diameter Length Diameter Embedment (pcs) / Box
KH-EZ 1/4"x1-5/8" | 1/4" 1/4" 3/8" 1/4" 1-5/8" 100
KH-EZ 1/4"x2-1/2" | 1/4" 1/4" 3/8" 1/4" 2-1/2" 100
KH-EZ 1/4"x1-5/8" | 3/8" 3/8" 7/16" 1/4" 1-5/8" 100
KH-EZ 1/4"x2-1/2" | 3/8" 3/8" 7/16" 1/4" 2-1/2" 100
Hilti, Inc. (US) 1-800-879-8000 | www.us.hilti.com I en español 1-800-879-5000 I Hilti (Canada) Corp. 1-800-363-4458 I www.hilti.ca I Anchor Fastening Technical Guide 2011 7Hilti. Outperform. Outlast. P.O. Box 21148, Tulsa, OK 74121 • Hilti, Inc. (US) 1-800-879-8000 www.us.hilti.com • Servicio al Cliente en español 1-800-879-5000 • Hilti (Canada) Corporation 1-800-363-4458 www.hilti.ca • Hilti is an equal opportunity employer Hilti is a registered trademark of Hilti, Corp. ©Copyright 2012 by Hilti, Inc. • 01/12 BB The data contained in this literature was current as of the date of publication. Updates and changes may be made based on later testing. If verification is needed that the data is still current, please contact the Hilti Technical Support Specialists at 1-800-879-8000. All published load values contained in this literature represent the results of testing by Hilti or test organizations. Local base materials were used. Because of variations in materials, on-site testing is necessary to determine performance at any *ISO 14001 US Only specific site. Laser beams represented by red lines in this publication. Printed in the United States
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