Cycle Sports Facilities - Design Guide - Facilities Guidance Note
←
→
Page content transcription
If your browser does not render page correctly, please read the page content below
Cycling 06:10:03 17:58 Page ii Cycling Sports Facilities Contents Introduction 1 Cycle racing tracks and velodromes 2 Closed road racing circuits 18 BMX race tracks 22 Cycle speedway tracks 31 Mountain bike courses and trails 36 Cyclo-cross circuits 39 Grass tracks 45 Road racing and time trials 47 School facilities 48 Multi-use facilities 51 Cycle sport for disabled people 56 Appendix A – Health and safety 57 Authors 62 Useful addresses 63 References 64 This guidance is supported by: Acknowledgements Sport England and British Cycling would like to thank the following contributors to this design guide: Ron Webb of R V Webb Consultants for the section Cycle Racing Tracks and Velodromes Bob Howden and Don Wiseman for their contributions to Closed Road Racing Circuits Peter Elmy and Keith Brookes of Colchester Stars Cycle Speedway Nick Day of Colchester Borough Council and David Hemsley for their contributions to Cycle Speedway Tracks Andy Ballentyne and Mark Burchett for their contributions to Grass Tracks Ron Akass for his contribution to Health and Safety
Cycling 06:10:03 17:58 Page 1 Cycling Sports Facilities Introduction The purpose of this guidance is to provide an introduction to the design and planning This design guide covers the design and requirements for each type of facility, however it planning of facilities for all the cycling is not a comprehensive manual of construction disciplines embraced by British Cycling. The specifications. Any individual or organisation facilities cater for all levels of participation and seeking to develop any of the facilities included include the following: in this guidance will need to employ specialists with experience in the design and construction ● cycle racing tracks and velodromes of cycling facilities. ● closed road racing circuits If you are considering the provision of a new ● BMX race tracks cycling facility, you are advised to consult the ● cycle speedway tracks facility officer at British Cycling at the earliest stage for advice on the type of facility required. ● mountain bike courses and trails You should also hold early consultations with ● cyclo-cross circuits the appropriate regional office of Sport England (see Useful Addresses). ● grass tracks This design guide complements the earlier ● road racing and time trials Facilities Strategy for Cycle Sport in England ● school facilities produced in 1999 by the then British Cycling ● multi-use facilities Federation (BCF) and Sport England. The strategy aims to provide a comprehensive ● cycle sport for disabled people. framework for the development of facilities for While there will always be a need for access cycling in England at national, regional and to roads and rights of way, purpose-built local levels. The strategy is concerned with facilities will be of increasing importance in ensuring that the right facilities are provided in the development of cycling. the right place at the right time. 1
Cycling 06:10:03 17:59 Page 2 Cycling Sports Facilities Cycle racing tracks and velodromes Cycling on the best specification for their particular area. The project in your area could The provision of a new track, or the refurbishment be an important part of the overall facilities of an existing one, will normally be motivated by scheme being developed by Sport England. local cycle racing clubs intent on furthering This document is intended as a guide for the standards of the sport and the development local authorities when initially considering the of youth talent towards na tional and construction or refurbishment of a cycle track. international competition. The types of track and the variation of sizes are A purpose-built track can also benefit user addressed on the following pages. groups not currently involved in organised cycling. A project to enable schools to adopt track New tracks cycling as an optional sport would involve county ● Cycle tracks can be built indoors or outdoors or borough education departments, which could in a variety of materials and in different be of value to the community and augur well for sizes. the future of the venue. ● New tracks are now constructed based on Youth and adult leisure schemes are possible the metric distance of cycling events: added activities. Persuading leisure cyclists to 250m track is 4 laps = 1km exchange public roads for a dedicated cycling venue is a forward step. Riding a bicycle on a 333.333m track is 3 laps = 1km public byway is an intimidating experience and 500m track is 2 laps = 1km the hardy few that persist are only a small ● Smaller tracks are used for indoor training percentage of the number of people in the UK facilities and in multi-purpose stadiums to who own a bicycle. stage annual spectacular professional Six- Therefore, when deciding on a track building Day Race promotions. project, it may be necessary to consider not ● The popular sizes for small tracks are only the specification of the cycle racing track, 166.666m (6 laps = 1km) and 200m (5 laps = but other community leisure pursuits that could 1km). For world championships and be incorporated in the scheme. Cycle tracks Olympic Games, the smallest acceptable come in several sizes and there is flexibility to track is 250m. At national cycling centres include local needs within the central arena where elite representative teams are area. Local authorities should consult British trained, tracks should ideally be 250m. Young track cyclists – Herne Hill, London 2
Cycling 06:10:03 17:59 Page 3 Cycling Sports Facilities Existing tracks A local authority may need to make a decision on the refurbishment of an existing track. The There are many 400m tracks in existence track may be situated in an area that is no around the world and quarter-mile tracks, which longer ideal for its intended use, or the land may were once an accepted standard, can be found have more important considerations for town in the UK. Such tracks originate from times and country planning. In other cases, the when sport was less concerned with world refurbishment of the existing track may require standards and town councils tended to build a complex and expensive engineering solutions. cycle track around a football pitch. In such situations it may be a preferred option Changing attitudes have seen sports develop a to consult with cycle clubs and British Cycling more elitist approach to their needs. We also with a view to building a new track of modern now accept that certain sports are not suitable design on another site. to share venues. However, British Cycling A local authority may consider that an existing appreciates that some quarter-mile – and larger cycling facility has not been well used in recent tracks – can still play an important role in the times due to the condition of the venue and the development of the sport’s grassroots and amenities. Ongoing dialogue between the can cater for the increase in leisure cycling. authority and user groups is essential. It is in Where certain older tracks are marked for the interests of the authority that the venue is redevelopment some changes to the geometry used more often and it is in the cycling clubs’ in order to conform to metric distances might interests to attract more leisure activities to the suit the identified user groups. track. Leisure cyclists may, in time, become active club cyclists. The National Cycling Centre, Manchester 3
Cycling 06:10:03 17:59 Page 4 Cycling Sports Facilities Indoor tracks To gain a perspective of the cost of building a velodrome such as the National Cycling Centre Velodromes, such as the Manchester National or the Sydney Olympic Velodrome, it is sobering Cycling Centre, house a track built with a timber to note that the cost of the 250m timber cycle surface decking, usually Siberian pine, supported track – the visual centrepiece of the stadium – can by a timber understructure. Indoor tracks built to be less than 2% of the total cost of the facility. host a world championship will be either 250m or 333.333m. It is now considered the norm to A 333.333m track requires a much larger build 250m tracks. building footprint and span. To achieve this, the The popularity of the 250m track stems from overall volume of the building increases out of the fact that racing on it is more spectacular all proportion to the increase in the size of the than on the larger 333.333m track. The design track. Funding a velodrome with a 333.333m offers better racing lines for cyclists, and track is prohibitive. spectators feel they are closer to the action on The National Cycling Centre is a showcase for the smaller size track. international cycling events in Britain. It is The 250m track is the better of the two options unlikely that another velodrome of this size and to build indoors. The overriding advantage of cost will be built again in the UK unless a British the smaller track is the lower cost of the building city is in a position to bid for an Olympic Games. to house it and the spectator accommodation. There is, however, a need for several indoor The velodrome building to house a 250m track cycle tracks to be built as training facilities. The will require a free span structure of 120m. The price of these venues can be kept to a minimum height of the building will preclude most with a cost-effective building shell providing a urban sites. small volume of spectator/educational trackside The Superdome, Adelaide 4
Cycling 06:10:03 17:59 Page 5 Cycling Sports Facilities Calshot Activities Centre, Hampshire seating for up to 500 persons. Simple, proven timber track is 142.857m or 7 laps = 1km. The building designs are available. For the national track is part of Hampshire County Council’s elite training plan, a 250m track is desirable. educational and leisure facility, providing sports facilities for up to 200 school children per week Where space is limited or a high-profile building plus evening and weekend adult cycling. is unacceptable to local planning authorities, thereby jeopardising a project in an area of A disused airfield hangar or similar shell may be stated importance to British Cycling, then a suitable for a training/competition track of 166.666m. 200m track is a good compromise for general Lighting training and racing. The geometry of the design An ideal solution for both lighting and PA can be developed to accommodate the desired systems is a rectangular catwalk suspended training programme without any great adjustment to the cyclist’s orientation. from the roof structure. Of simple box design with handrails at 1200mm and mesh sides, the In the UK climate, indoor tracks are needed for catwalk should follow the length of the track the training of elite national cyclists, but they straights, directly over the inner arena edge of are also essential to provide all-year-round the safety zone, this being about 3.5m from the activity. Schools will be encouraged to place track edge. The short sides of the rectangular track cycling on the list of recognised school catwalk will then be well inside the semi-circular sports, but year-round availability of the venue ends of the arena. Though these sides are must be guaranteed. distanced from the track edge of the curves, the Tracks can be smaller and fill an important role lighting value on the track surface will be similar in activity centres. At the Calshot Activities to that above the straights due to the banking of Centre in Hampshire, a track is situated in the the curves reflecting light and by directional restricted area of half an aircraft hangar. The adjustment of the lamps. 5
Cycling 06:10:03 17:59 Page 6 Cycling Sports Facilities Indoor track construction, Sydney Olympic track Construction detail, National Cycling Centre, Manchester 6
Cycling 06:10:03 17:59 Page 7 Cycling Sports Facilities The lights are directed at the blue track line, at midway on the width of the track surface. The lights should be positioned about 8–10m apart to ensure an even spread of the light value on the track. The direction of light fittings and speakers can be fine tuned and repositioned for various arena spor ts and functions by one person, even during track use. This structure is a far better solution than an oval ring of lights above the track, which will require the use of a cherry-picker vehicle to change a light fitting. Surface light values for an indoor track are 300 lux for training or general activity and 600 lux for racing events. A cut-in emergency lighting pattern, battery powered, of 150 lux is a Semi-covered track, Cottbus, Germany necessity. Should television lighting be required, extra lighting can be added to the catwalk to bring the surface light value to 1200 lux. The cost of the engineering solution. Structures are goal is to illuminate the track for the cyclists cantilevered or have building trusses supported without throwing shadows, a dangerous by masts in the central arena. Experience has distraction when riders are in bunched races. shown that in most cases it would have been better to go the whole way and roof the entire The catwalk should be about 12–14m above the stadium. If a decision to roof the central arena floor. opening is made at a later date the engineers Semi-roofed tracks may be compromised by the original design. Tracks can be built with a roof that extends over Despite the extra funding required, a complete the spectator accommodation and at least 5m roof cover offers the valuable bonus of a usable past the inner perimeter of the track safety central arena area and the venue becomes a zone. These velodromes afford protection from multi-purpose stadium. normal rainy weather and could possibly be Lighting used for all-year training and a schools activity Light fittings and PA speakers would be programme. positioned under the cantilevered roof above In some countries existing concrete tracks have the track safety zone. Lighting in the curves been semi-covered to ensure regular cycling would not be as intense as the value over the use. If a semi-covered stadium were built with straights, thereby avoiding pools of light. the track made of timber, the track surface Outdoor tracks would need to be hardwood. In order to maintain TV coverage in all weather The stadium is cer tainly still open to the conditions the Union Cycliste Internationale elements. Wind-driven rain may reach parts of (UCI), the controlling body of world cycling, the inner track surface and, in winter, extreme prefers world championships to be allocated to cold may deter cyclists from serious training. bidders with covered velodromes. If a track If you have limited funding, a semi-covered world championship is awarded to an outdoor velodrome is a compromise solution. The track in the future, it will surely be in sunny argument against semi-covered tracks is the climes. 7
Cycling 06:10:03 17:59 Page 8 Cycling Sports Facilities Outdoor tracks may be used for other important events, such as World Cup, Grand Prix and junior world championships. The minimum size of 250m still applies though there is no maximum size for an outdoor track. The maximum in practical terms is 500m. An advantage of an outdoor cycling stadium is that after the track, terracing and basic amenities are in place, further infrastructure may progress as funding becomes available. Should an important event be planned in the early days of the stadium, temporary seating and equipment storage can be hired for the promotion. Landscaping can also be developed in the long-term plan. There are not the A completed timber track Wanganui, New Zealand demands on an outdoor cycling facility to be an instant reality. On the other hand, an indoor Timber tracks facility must be funded and complete when the doors open. These tracks are very appealing to racing cyclists as the timber surface produces very Building materials fast racing speeds. The timber profiles of the Three types of cycle track are built outdoors: prefabricated understructure ensure that the shape of the finished track is true. If the original ● timber computer-aided design is precise, then the ● concrete finished track will be perfect. ● asphalt. However, an outdoor timber track does have distinct disadvantages: ● A timber track using proven suitable wood will have surface timber of either afzelia from West Africa or merbau from Borneo or the Malaysian peninsula. Afzelia has been used on many tracks and is a very dense timber resistant to moisture absorption. Afzelia has the disadvantage of varying grain lines, which can result in a length of lath containing both long and short grain. In such cases the wood is prone to splitting, with the lath breaking at the short grain. Merbau is of similar weight and density to afzelia. The laths are far more likely to have continuous long grain. Merbau is easier to work with, easier to obtain and less expensive than afzelia. ● Building a hardwood track is hard work. The wood must be drilled before nailing and the timber laths are difficult to bend and twist to Constructing timber track Taichung, Taiwan follow the form of the track transitions. 8
Cycling 06:10:03 17:59 Page 9 Cycling Sports Facilities Athens Olympic track – will be roofed for the 2004 Games ● The managers of venues with hardwood A concrete track will be relatively maintenance- timber tracks will find them expensive to free and should have a lifespan of many years. maintain and in constant need of repairs to Many concrete tracks around the world have surface defects. Local authorities been in constant use for 50 years or more. considering requests to construct outdoor In the past, many building companies have been timber tracks would be wise to inspect an reluctant to undertake laying concrete angles existing venue that has been in use for five up to 45º in the curves of a 250m track or 38º years or more and to obtain annual for a 333.333m track. It is, after all, an unusual maintenance costs. contract to be offered. ● Outdoor timber tracks have an outstanding appearance when in good condition and The concrete surface is constructed by laying produce record times, but are not cost- slabs in a ‘hit and miss’ pattern around the effective in the long term. shape of the track. A practical slab size is 8x8m. The screed cannot be finished from top Concrete tracks to bottom of the bay. The curved shape of the In Britain, concrete is a common locally sourced bays demands screeding horizontally. All joints building material, and its qualities and uses are are vertically cut and there are no longitudinal stock-in-trade to British civil engineers. It is production joins. The angle of the track in the logical that, given specialist track design advice, banked curves restricts the concrete mix local construction companies employing specification to 40mm slump. This mix cannot experienced workers can build a cycle track. be easily pumped. Dumping, vibrating, levelling 9
Cycling 06:10:03 17:59 Page 10 Cycling Sports Facilities 1 Compacted and levelled 2 Low slump concrete 3 Slab poured, tamped, vibrated and finished in 4 Horizontal screed and finish one continuous operation 5 Alternative bay construction 6 Surface finished and fence posts positioned Concrete track: Stages of construction 10
Cycling 06:10:03 18:00 Page 11 Cycling Sports Facilities and finishing of the 8m-wide bay must be The task is to illuminate with an even spread completed in one pour. To facilitate the trowel over the 7m-wide surface of the track without finishing of the slab, the workers are supported definite pools of light. on a movable cradle across the track width. The materials for the lighting system are readily Tolerance on the finished slab is +/- 3mm. available. Masts, lamps and cables can be A concrete surface is suitable for cycling but standard street lighting fittings. The height of does absorb rainwater, thus preventing use until the masts should be about 6m. Cables for the some time after the rain has stopped. If funding lights can be run under the concrete path is available, a 7mm topping of an epoxy-resin around the outer perimeter fence. mix containing ver y small a g g rega te is recommended. The material is trowelled onto Asphalt tracks the finished concrete. This surface is impervious Asphalt surfaces are not recommended for to water, allowing racing or training to commence banked tracks of 250m or 333.333m and immediately after rain has stopped. The surface authorities building a new, larger track should is also super-fast. Several record-breaking consider other options. tracks in Europe have this surface and the Britain has many asphalt tracks built around a Herne Hill track in London is an example. football pitch or athletics track. These very The quality and success of the finished track large, flat tracks of 450 or 500 yards have will depend on the standard of the concrete provided British cyclists with great service for works and, in par ticular, the skill of the generations. It is important that the more valued tradespeople doing the final finishing work. The of these are refurbished and maintained in required tolerances are essential for a good serviceable condition. It is appreciated that not track. The building work will require constant all areas need or wish to build a modern track quality control at all stages. for national-level competition. Where construction budgets are restricted, Renewing asphalt on a very large, flat track project engineers may consider the advantages does not present difficulties. Continuous rolling offered by fibre-reinforced concrete. The savings of new asphalt with a heavy road roller will – in steel reinforcing mesh, transportation and the labour content of the preparation present a strong argument for this material. The strength of the fibre concrete lends itself to the twisting shape of the slab in the transitions of a banked track. Care must be taken, however, that the finished surface is ‘hairless’. Lighting An oval pattern of masts around the outer perimeter is a proven and cost-effective way to illuminate the surface of a cycle track. The masts should be about 10m apart and, for safety reasons, positioned approximately 1m away from the track fence. An arm of about 1.5m in length reaches to just past the track fence. Two lamps can be fixed to the end of the arm at angles to enhance the spread of light. The even spread on the surface is achieved by the illumination from one lamp overlapping the Club cyclists in action on the asphalt Harvey light from the lamp on the neighbouring mast. Hadden Track at Nottingham 11
Cycling 06:10:03 18:00 Page 12 Cycling Sports Facilities providing there is no serious damage to the tracks. The effect can never be the same as base foundation – bring the track back to its heavy rolling. original condition. A lack of heavy rolling is probably a major Asphalt is an ideal material for road surfaces cause of surfaces bulging or splitting. Frost but demands continuous kneading to ensure damage is an added hazard with asphalt. flexibility and durability. On a roadway, daily Where a large track is well used and maintained traffic provides the kneading process. Cycle and of value to the community, refurbishment is racing tyres, as narrow as 20mm and pumped a sound idea. However, for those tracks where to 120psi, cannot simulate this effect the cur ves are banked and unsuccessful Banked cycle tracks are not the ideal attempts have already been made to resurface environment for slow, heavy road rollers. On a the track, it is probably advisable to consider a banking angle of just 15º they would hardly concrete surface. If the venue has been in wind up, even rocket assisted, to the centrifugal place for many years and the basic foundation force necessary to maintain friction and even is well settled and compact, there may be no distribution of weight. It is logical that the full need to demolish the old track. A bed of lean- weight of the machine will gravitate towards the mix concrete to a reasonable depth can be inside edge of the rollers. Heavy rolling to compacted onto the old track, before constructing compact the asphalt is not possible. On some the concrete slabs over the lean-mix. The existing tracks, it is probable that the job was redesign could also develop more suitable done using light rollers or even by teams of geometry and the opportunity to reshape the workers pulling rollers up and down the banked bankings in the curves. The asphalt track at Reading is a valuable asset for the grass roots of the sport 12
Cycling 06:10:03 18:00 Page 13 Cycling Sports Facilities Completing the track project Track fence A track used for the highest standard of competition must have a fully enclosed perimeter fence 750mm high. A continuous steel safety rail on brackets will be fixed 250mm above the fence. The total height of 1m is measured from the top of the track surface at the fence. This measurement will be constant around the full circumference of the track. This height is considered practical to help prevent a cyclist who crashes into the fence from toppling over it. Concrete safety fence, Cardiff On the public side of the fence the concourse will be slightly lower than the level of the top of the track surface to conform to height requirements for a standing person behind a barrier. This can be 1100mm but may be higher for some local authorities. A well-designed stadium would provide terracing to accommodate seated spectators. A recommended step for the terraces is 500mm and these steps rise as the transitions of the cycle track rise. The depth of the terrace ‘going’ would be 800–1000mm, according to the number of seats planned and the type of seating used. On a track for regional events, school groups and leisure activities, a cheaper alternative is a fence clad with tongue and groove timber Enclosed timber fence and track lines at Herne Hill, London boarding on the trackside only, with a capping and a supported steel rail. On a track with no greater ambition than to provide for cycle clubs and local community activities, the fence could be a tubular steel frame with plastic-covered fine mesh chainlink fencing. It is advisable to fabricate a second continuous rail at the top of the chainlink fence without any obstructions that might injure hands or arms. Along the bottom of the fence, trackside, there must be a well-designed and fitted kickboard to a height of at least 250mm. Safety run-off Where track surface and the slow run meet at the bottom of the track, a curved run-off must join the two different angles. The width of this strip on a concrete track should be 1m. This Mesh covered fence at Gosling Stadium, Welwyn Garden City 13
Cycling 06:10:03 18:00 Page 14 Cycling Sports Facilities strip must be poured and finished at the same or asphalt tracks, storage should be a detail time as the main slab with no horizontal within the planning. A cost-effective idea for construction joint. outdoor stadiums is the use of steel shipping containers bought from the trade disposal market Safety zone and painted to blend with the background. There should be a sealed zone, minimum 3.5m wide, around the inside of the track. This zone Car parking is a safe riding area for cyclists, and a path Local planning authorities have specific car parking where school pupils, or other first-time cyclists, standards and these vary between authorities. can learn the skills of riding a cycle with fixed A regional facility is likely to require spaces for wheel gearing. If the central arena is grass, this at least 50 cars while a stadium of national buffer safety zone will ensure that use of the importance will need in excess of 100. Parking track is not restricted in wet weather by muddy and turning space for coaches will also be conditions in the central area. required. Consideration should also be given to Perimeter concourse the occasional need for overflow car parking for A sealed path around the top of the track special events. More details can be found in the perimeter, outside the track fence, should be a Guidance Note Car Park and Landscape Design minimum of 1.5m wide and follow the contours (see References section). of the track profile. This path will provide a Track markings walkway for spectators and prevent rainwater UCI regulations for marking tracks used for filtering under the track surface. For a concrete track, the strip is an essential building aid during international competition the construction of the concrete track slabs. Track records are only recognised if all UCI Amenities regulations for record attempts are complied with, including those for track markings as detailed Cycling stadiums follow the normal guidelines in Table 1. for sport and leisure facilities. A suggestion is offered here that changing, lockers, showers Paint: Best quality emulsion paint. Do not use and toilets should be planned in module form. If oil-based paint. units are designed for up to 10 persons, the Colours: Common sense will prevail on asphalt number of units can reflect the forecast volume or dark grey hardwood tracks. In these cases it of competitors using the stadium. The advantage is suggested that white replaces black, yellow of the modular format is that the number of replaces red and light blue is used instead of units open for use can change to meet male/ mid-blue. female needs on each occasion. During training sessions, units that are not required can be Track area required locked. This imposed discipline reduces cleaning Figure 1 on page 16 illustrates a typical cross- duties. Two rooms should be planned for section for a concrete track. Figure 2 on page 17 massage and a limited gymnasium would be shows the shape and the area required for a good for cyclists, and a possible attraction for typical outdoor concrete track with a circumference non-cyclist users of the facility. of 333.333m. Bicycle storage This size track, 3 laps = 1km, is recommended Storage space will be required. If cycles are to as a good solution to the need for general be left at the stadium by club cyclists, the cycling activities from beginner to elite level, storage must be secure. If the track is of timber and provides a central arena area to accommodate construction, space can be allocated under the a wide variety of sports. This venue would be curves of the track, using ply sheeting to cover multi-purpose. the underside of the track trusses. For concrete 14
Cycling 06:10:03 18:00 Page 15 Cycling Sports Facilities Track marking Colour Position Setting out line The base line used during track construction Track run-off zone Light blue Area below setting out line. Outdoors: width 1m Data line Black 200mm above the setting out line Sprinter line Red 900mm above the setting out line Stayer line Mid-blue 2500mm above the setting out line All Black, red and blue Black, red and blue lines are 50mm wide and painted on the full circumference of the track. The exact distance to measure track lines from the setting out line is: • to the bottom edge of the black line • to the top edge of the red line • to the top edge of the mid-blue line. Finish line Background: white 7m or the full track width panel 7mx720mm Centre line Black Width: 40mm 200m line Black Width:40mm 7m or full width of the track vertical from the 200m measurement Pursuit lines 3.5m vertical from mid-point of the straights on the track axis; two lines Distance marks Black 10m marks measured along the bottom of the data line: Width: 30mm centred on each 10m mark Length: 200mm (joining the black line to the blue safety run-off zone) Distance marks Black 5m marks measured along the bottom of the data line: Form: a black square 30x30mm centred on each 5m mark Track numbers Black Position: to the right side of each 10m mark line Height: commercially available stencils of 180mm or 150mm Table 1 UCI regulations for international level track markings 15
Cycling 06:10:03 18:00 Page 16 Cycling Sports Facilities Figure 1 Section through track Herne Hill Stadium, London 16
Cycling 06:10:03 18:00 Page 17 Cycling Sports Facilities Concourse circumference 436m Track circumference 333.333m Track perimeter 373.5m Track width 7m Highest angle 28º Lowest angle 5.5º Figure 2 Velodrome cycle track The ground area required to build a track only, A 400m track should only be contemplated with a concourse 5m wide around the track but where there is a requirement for a grass central not including seating or amenities, would be: area for hockey or football. Where the need is to refurbish an existing Track (m) Length (m) Width (m) quarter-mile track, consultation should take 250 116 78 place to adjust the geometry to the dimensions 333.333 138 97 of a 400m track. 400 181 104 Author of section on velodromes: © Ron Webb – R V Webb Consultants Table 2 Track dimensions (see Useful Contacts) A 250m track would be ideal for dedicated cycling use with a reduced central arena area capable of accommodating a variety of sports. 17
Cycling 06:10:03 18:00 Page 18 Cycling Sports Facilities Closed road racing circuits Closed road racing circuits serve two main functions, both of which are complementary to the development of international road racing: ● a means of training by competition in surroundings not affected by other road users – this is particularly important for under-16s whose road racing is confined to closed circuits ● a form of road racing that will attract the public, thus making it a spectator sport. In many areas, circuits already exist in parks and recreation grounds or could easily be extended to provide a completed circuit. For A site investigation process should be undertaken new recreation complexes, consideration should by a specialist company to determine the following: be given at the design stage to the construction ● presence or otherwise of hazardous of access roads so that these complexes can materials be used for closed road circuits. ● evidence of insufficient compaction in fill Layout and dimensions materials Small circuits at multi-use sites should be at least ● water table level and ability to drain naturally 0.5km in circumference. These are suitable for ● allowable ground-bearing capacity to enable introducing newcomers to cycling and for basic design of road construction. training (Stage 1 activities in British Cycling’s Progression Pathway). Road design Closed road circuits of at least 1km circumference In all probability the circuit will only be used by will be suitable for most local and regional level cycles, race vehicles, emergency vehicles and activity, although 3–5km circuits are necessary those vehicles associated with site maintenance. for regional and national competitions. A circuit Failures in paving layers tend to stem from width of 6–8m is recommended. If the nature of unplanned use by vehicles that were not the circuit restricts the width, a minimum width originally intended to be there. Take such use of 5m will be acceptable. The finish area width into account at the design stage if it cannot be must be 7–8m. Closed road circuits will be used prevented with physical barriers. for races similar to those on open roads and The best design solution incorporates a standard should therefore simulate this if possible with 250x125mm kerb laid on its side to form the hills and bends. road edge. The paved edge should be laid with Site investigation a surface falling towards the verge, assuming the verge is grassed. The inclusion of a positive The opportunity to develop a closed road circuit drainage system such as plastic pipe drains at will often arise as par t of a regeneration the edge of the circuit will assist in dispersing programme, therefore the chosen site may well surface water. This type of approach was used be classed as ‘brownfield’ with formation levels for the construction of the circuits at Eastway consisting of significant measures of landfill and Hillingdon. material. It is essential that the characteristics of the site be investigated to determine suitability A cheaper solution would exclude the road for use and the optimum construction methods. kerbs and positive drainage. However, this could 18
Cycling 06:10:03 18:00 Page 19 Cycling Sports Facilities lead to roads that deteriorate quickly and need for the removal of up to 15000m3 of spoil, frequent edge maintenance. equal to 750 full lorry loads. In addition to the impact on the neighbourhood of heavy traffic If the ground is likely to drain poorly, it will be movements, this can also be a costly factor, necessary to consider a verge drainage solution, particularly with the increasing burden of landfill and a number are available. In the French drain tax. Where possible, therefore, consideration method, a trench fill consisting of single-size should be given to on-site disposal in the form shingle/gravel wrapped with a geo-textile will of earth screening bunds; these can also be provide a cost-effective solution where the used to form contours for off-road activities. At water table permits percolation. Alternatively, Hillingdon, moving earth around the site formed proprietary wick drain systems are available the contours of the circuit. However, care needs that require minimum excavation. to be taken to ensure proper consolidation and Remember that the verge should be firm drainage and that bunds are not positioned too enough to support narrow tyres. Where gravel close to the road circuit, as the height of the fills are used they should be capped with a bund could influence the local water table by stable material. creating a pressure head. Consideration can also be given to the use of If additional fill is required, it may be possible to porous asphalt paving that will reduce the secure permission for controlled tipping. The volume of surface water run-off and help to contours of the final circuit at Eastway were prevent standing water. However, such paving formed in this way and the charges levied paid layers can be costly to lay and care will be for the road construction. needed to ensure that the surface does not The site investigation will highlight the ground- become contaminated with pore-sealing dirt, bearing capability of the underlying soils and particularly where used in conjunction with off- suggest a suitable sub-base depth. Before road competition. commencing the sub-base it is advisable to At locations where the circuit will meet other consider the use of a geo-textile membrane types of paving, the edge should be finished over the excavated surface. As the construction with a 150x150mm pre-cast concrete ‘square’ operation will be ‘linear’, the sub-base will be channel. This should be laid to finish flush with required to accept the load of all delivery both paving layers. vehicles and laying equipment. The membrane will therefore help to prevent the sub-base Road construction being pumped into the underlying layer during A major factor to consider is the initial its loading, avoiding contamination of the stone excavation. The road in a typical circuit may call and consequent costly wastage. Figure 3 Cross-section through closed circuit cycle track 19
Cycling 06:10:03 18:00 Page 20 Cycling Sports Facilities The sub-base will lie within 450mm of the Good practice finished level; this is determined as the maximum Preston Sports Arena – University of Central range of frost penetration. Care should be Lancashire taken, therefore, to ensure that the sub-base The University of Central Lancashire has material is not susceptible to frost damage. This developed a 60-acre site to provide a new, high- can be achieved by choosing a specification quality outdoor multi-sports complex on land for highways clause 803 type 1 granular sub- acquired for the purpose by the university. A base. With modern screening techniques this central feature of the development is a 1.7kmx6m specification is increasingly being met from wide, tarmac-surfaced closed road circuit that recycled cr ushed concrete, a cheaper and runs around the perimeter of the facilities. more sustainable solution, par ticularly if Other facilities include an athletics track, hard the ‘brownfield’ site of fers the possibility court sports area, grass pitches and a synthetic of obtaining the material locally, perhaps turf pitch. The complex has been built at a cost even from the site itself. of £12,272,081 with the aid of an award of For low traffic use the sub-base depth will £7,976,853 from the Sport England Lottery normally be a minimum of 200mm, unless the Fund. All the facilities are available for joint use site investigation report identifies underlying by community and university sports organisations. weak ground, in which case the depth should The provision of an off-road cycle track was be increased. recognised in the Cycling Development Plan The choice of paving material should take into produced jointly by all key partners. Cycling is a consideration factors such as rolling resistance, well-established road-based sport in the area ‘fall-friendly’ texture and potential to skid. and the lack of an off-road facility that would Economy will also be a major factor but this provide a safe environment for young people should not be at the expense of performance. It was identified as a priority. The facility is is invariably much easier to incorporate the immediately adjacent to the canal towpath and capital costs of a durable material into a project links to the future Sustrans cycle route. The than it is to fund the repair or replacement costs facility also links to a series of cycle ways at a later date. developed by Preston Borough Council through A typical specification for the circuit-paving layer the town. with nominal vehicle use can be identified as: This project demonstrates that it is relatively Road base: dense base macadam to BS4987 easy to incorporate a cycle facility into a multi- using 40mm thick coarse aggregate, average sports facility. Careful planning and programming thickness 75mm. are essential when planning a multi-sports facility to ensure minimal conflicts of interest Base course: dense base macadam to BS 4987 between different sports. using 28mm thick coarse aggregate, average thickness 50mm. Wearing course: hot rolled asphalt (HRA) to BS 594 with 55% of l4mm thick coarse aggregate; average thickness 30mm; overall thickness 155mm. Where surface markings are incorporated, consideration should be given to the potential for slip in wet conditions. The recommendation is to use a low-build chlorinated rubber marking paint rather than thermoplastic markings. 20
Cycling 06:10:03 18:00 Page 21 Cycling Sports Facilities Cycling circuit Figure 4 Closed road cycle circuit at Preston Sports Arena Aerial view of Preston Sports Arena 21
Cycling 06:10:03 18:01 Page 22 Cycling Sports Facilities BMX race tracks Track design Starting area BMX race tracks must adhere to the minimum requirements of British Cycling and the Union The starting area is one of the main focal points Cycliste Internationale and be of a high enough on a track. A paddock area should be sited standard to host a regional event. Such race behind the start hill to allow racers to come on tracks have a separate start and finish and are to the star t gate in an efficient and orderly constructed with various corners and jumps manner. It must be large enough to allow that are designed to be challenging while taking competitors to line up before their race. The account of riders’ safety. access to the start hill should incorporate a shallow incline so that riders can push their The star t hill, as the name suggests, is a bikes up while waiting to race. Access to the downhill gradient with a start gate at the top. gate should allow riders to line up behind those The riders start with their front wheels pressed already on the pad and should be wide enough against the start gate, which is hinged and to give access to the pad and gate. The material drops forward when released to start the race. for this part of the track should be the same as The average BMX track will be 300–400m in the surface of the track to stop foreign material length with a hard, smooth surface. The track from being impacted into the race surface from design will include obstacles constructed at riders’ feet or tyres. strategic points to add excitement and an extra skill factor to the racing. There are also banked A track with a tarmac start hill requires a sub- turns (berms) to help riders maintain maximum base and a top surface dressing of tarmac. speed during a race Concrete can be used for the surface but experience has shown that over such a large and sloping area the settlement of the hill will cause cracking and in some cases require complete replacement within a few years. Tar mac on the other hand will, to some degree, move with the settlement and reduce maintenance costs. The height of the hill should be at least 2m, preferably higher. This will be the highest part of the track and its visual impact on local residents must be considered. From the start gate the hill should extend for 12–13m before reaching nominal track level, with a smooth transition between the two. This can be achieved by laying the tarmac below track level with the final surface laid up to the tarmac. The pad to which the gate and release mechanisms are attached should be made from reinforced concrete to ensure solid and permanent fixings. The start pad must be at least 10m wide and 2.5m long. It should have a rough ribbed finish to provide grip for the competitors’ tyres (scoring across the surface will provide extra grip) and should be set at an angle of at least 20º to the horizontal. The start pad should be at least as steep as the starting slope, preferably 5–10º steeper. 22
Cycling 06:10:03 18:01 Page 23 Cycling Sports Facilities Figure 5 Details of start grid in BMX circuit The height of an obstacle is dependent on the speed of the riders – small in slow sections, larger in faster sections. Obstacles on slower parts of the track should be steeper than those on faster sections. The transition of the slopes is very important. A gradual slope from the ground getting steeper towards the top is required. The total length of an obstacle is dependent on the speed of the riders and the location on the track. Figure 6 Details of mounds in BMX circuit 23
Cycling 06:10:03 18:01 Page 24 Cycling Sports Facilities The gate should be constructed of a good Jumps strong tube or box steel, but can be constructed One of the first jumps or obstacles on the track in light alloy if available. It must be a minimum will often be a large set of doubles. The riders of 8m wide and 50cm high and perpendicular to will approach these at speed and hence the the slope of the pad when in its upright position. obstacle should be made wide (approximately The gate release system should be made to fit l0m from front to rear edge) with a shallow the gate and, if manual, enable release of the centre, hollow to allow younger riders to ride gate with hand or foot pressure. It is preferable through it. It is important that the second peak to have an electrical or pneumatically controlled is slightly higher than the first as this enables start gate, and essential for a national event. those riders who are jumping the obstacle to judge the distance as they approach it. To prevent unsupervised children from trying to lift the start gate, as a minimum precaution it The landing area should not be too shallow as should be padlocked. riders will use the angle to control their landing; if it is too shallow they will tend to land very In competition use, the starting positions should heavily and lose control. Shallow landing areas be clearly marked 1–8 on the gate. If automatic also stop less experienced riders jumping down gates are used for competition, appropriately and landing on the front wheel only, which can coloured lights must be provided and positioned easily cause loss of control. in such a way as to be clearly visible to all riders, without disadvantage in the ‘pedals Table top is another obstacle that should be ready’ position. If using an automatic gate there l0m wide and 2–2.5m high to give younger must be provision for a mechanical operation in riders extra speed as they come down from it case of failure. into the turn; it is also intended to slow older riders as they will tend to jump it. The same Start or first straight comments about landing slopes apply. A flat The start or first straight should be a minimum table top should be about 4m wide and 1m high 40m long and start with a width of l0m, tapering so that the more skilled riders will have enough down to 6m as it enters the first berm. As speed to jump the obstacle with a flat trajectory the first straight is usually where the most or to ‘manual’ the jump, that is, ride it on the spectacular obstacles are sited, a generous back wheel only, while still applying pedal power. width is recommended. A speed jump should be about 1m high, down to 0.4m high for the small types. It usually has a reasonably shallow rear edge and a steep front so that speed gets riders over it, and they can gain speed by using the down slope as a mini start hill. Step-up doubles or step-up table tops can also be high (2–2.5m) with an overall length of 8–l0m, which will be controlled by the speed of riders entering the obstacle and its position in relation to berms and other jumps. The rear face of the jump should be reasonably steep to enhance the skill level of riders who are jumping and to maximise the speed for younger riders through to the next obstacle. Averagely skilled riders in the older classes should be able to jump from the front slope onto the top but not over the whole jump; the best riders will clear the jump. 24
Cycling 06:10:03 18:01 Page 25 Cycling Sports Facilities Figure 7 Typical BMX circuit A combination of two doubles can be very 2&2, that is, jump the first double into the centre exciting to watch and to ride. Each element hollow then jump out and over the second double. could be about 6m long with shallow centre Often the most challenging obstacle is a hollows but the transition hollow between the combination or sequence of six jumps, each two sets should be deep and longer. Younger/ about 3m long and 1m high with centre hollows slower riders will be able to ride through the between the jumps, which should be 0.75m combination and older/faster riders will do a 25
Cycling 06:10:03 18:01 Page 26 Cycling Sports Facilities Figure 8 Elements of a BMX circuit deep. Younger/slower riders will be able to ride without being stuck in mid-air. A distance of through the combination and older/faster riders about 2m should be satisfactory depending on will do various combinations of 2&2&2 or ride the angles of the slopes and the shape of the two, jump two and so on. The skill of the rider will jumps. The slopes need not be severe and the dictate their preferred route through the obstacle. jumps should have a well-rounded profile. A tandem roller such as the Bomag 80 is a good The space between jumps should allow a guide to shape as it should be possible to take the normal full-size BMX bike to fully enter and exit roller through the full sequence without grounding. 26
Cycling 06:10:03 18:01 Page 27 Cycling Sports Facilities A small set of doubles, 4–6m wide and 1m A common mistake is to build jumps too small high with a shallow centre hollow, gives younger as this entices younger, less experienced riders riders enough speed to ride the obstacle and to try jumping them – often when unsupervised use the down slope to give them speed into the – while older riders will over-jump the obstacle next berm or jump, while older riders will be and risk bike damage or personal injury by not jumping them. having a proper landing slope. Another obstacle is the triple, which will be First berm 12–l5m wide and l.5m high at its third jump. The height of the first berm (bend) should be Younger riders will ride it without difficulty while 2.5–3m at its outer edge with a steep internal older riders will have the option of jumping parts slope to help riders maintain the speed at which or all of it or just riding through. they enter the corner and to ensure a safe exit. The height of an obstacle is dependent on the Any trees around this area should not interfere speed of riders and the approach line to the with the track at any point and should be at jump. Slower sections of the track require lower least 3m from the track edge. jumps than the faster sections but, where the The minimum width of the first berm should be riders are exiting a fast berm, any jump close to 6m from the inside of the track to its top and the berm will generally be low. The transition of allowance should be made for a smoother the slopes is also very important and can only transition from the l0m wide start straight to the be judged by experience or trial and error. A rest of the track. The first straight is long and gradual slope from the ground, getting steeper will be fast – hence plenty of room is needed at towards the top of the jump, is required and the first berm for all riders to have an equal this relationship varies from jump to jump chance of negotiating it safely. depending on height, speed and location to other jumps. The length of jumps is also dependent Unlike in road construction, more material and on the speed of riders and their relationship to height is needed on the exit of the berm to the berms and other jumps. ensure transition to continue on the track. This 27
Cycling 06:10:03 18:01 Page 28 Cycling Sports Facilities maintains more momentum during racing, and When using the track for competition, the finish allows alternative race lines for overtaking and line must be clearly marked on the track to prevents collisions. indicate the finish point. Finish line banners must also be high enough not to interfere with Other berms any rider or finish line official and vertical A berm’s height will vary depending on its supports must be placed back a minimum of 2m shape and overall width. A tight turn might need from the track edge and padded if necessary. to be 2–2.5m high at its outer edge with a fairly steep internal slope to maintain speed into the Track construction corner and onto the next straight, while a wide open turn can often require much less height. Grass and good-quality topsoil should be removed. Topsoil can be used later on the The minimum width of a berm should be 5m backs of berms and sides of obstacles (areas not (6m for UCI events) from the inside of the track surfaced) to provide support to the structures to its top to ensure adequate race surface. and to establish grass, which enhances the When the berm is not in use it may reduce facility’s final appearance. maintenance costs and be aesthetically pleasing to allow grass to grow on the inside edge. A The importation of clean material – no chemicals, good guide is to put most of the height in the glass, wood or rubbish – is required to build last third of the berm and then add to it if up the main parts of the track (berms and required. The objective is a smooth transition obstacles). For the construction of the larger from the entry straight to the rest of the track. obstacles such as the start hill, berms and larger jumps, crushed materials (no larger than Last straight 100mm) taken from excavations of roads, Normally the last straight is fairly technical with building sites and so on are suitable as they are combinations of carefully spaced jumps. stable and will not spread or change shape Finish area during settlement. This material should be An area should be provided beyond the finish covered with spoil to a depth of at least 150mm line for riders completing the course to slow to prevent it from coming to the surface. The best down safely. This area should be fenced off to spoil is clay based as it is stable and remains so protect spectators. Allowance should be made during and after construction. This spoil can for up to five officials to stand at either side of also be used to make the smaller obstacles. the track. On undulating or sloping land it might be possible to reduce the quantity of material imported by using the natural lie of the land and by the repositioning of on-site materials. Once the basic shape of the track is complete a sub-base must be added. Depending on the soil conditions the following recommendations are made. Soil condition Clay, sandy or light soil The sub-base, approximately 20mm down, should be laid and compacted to a finished depth of approximately 100mm over the entire track. Following this the complete track area should be surfaced with a fine soft limestone 28
Cycling 06:10:03 18:01 Page 29 Cycling Sports Facilities dust or dolomite (3mm to dust) to a compacted depth of 20mm. With any clay-based soil there is always ‘clay heave’ during adverse weather conditions, so care should be taken that areas will not become water logged causing the surfacing to ‘mud up’. If it is clear that the area will remain wet, the following procedure should be followed: ● Remove all affected materials (for reuse). ● Fix a terrain membrane to the wet area. ● Fill with hardcore or similar free-draining stable material and compact. Track surfacing materials ● Follow normal track construction. The following totals are a guide to the required Stone/shale materials for the basic track stated above: This ground condition requires less sub-base ● sub-base material 200 tonnes material as the ground is more stable and less likely to ‘mud up’. Lay 10mm to dust sub-base to ● top surface material 40 tonnes. a compacted depth of 30mm. The area is then It is extremely important to achieve an aesthetically surfaced as with the other soil types. pleasing appearance for the track and surrounding areas in order to preserve the standards and Material requirements the image of the sport of BMX racing. The following information is for general guidance only and types of material and detailed estimates Concrete start hill of quantities must be based on your final For a track with a concrete ramp or start hill, track design, preferably in conjunction with an the requirement would be for the use of ready- experienced track designer/builder. British Cycling mixed concrete laid to a depth of 100mm and can provide contact details of recognised BMX ‘tamped’ to secure a fine ribbed surface (not track builders. smooth) to the length and width of the start hill – 10x12m. Spoil The quantity of concrete required for the start While tracks can vary in length, the average hill would be approximately 10–12m 3 with a track is approximately 350–400m long by 6m 4:2:1 mix using 10mm stone. An air-entraining wide. Tracks can also vary in the number of agent is recommended in the concrete mix to turns and jumps they have. Assuming a basic increase its life expectancy in frosty conditions. track layout with four turns and six jumping Suitable joints running longitudinally are sections, the following approximate totals of recommended for expansion. spoil would be required: Tarmac start hill ● start hill 250–300 tonnes A track with a tarmac start hill would require a ● turns 250–300 tonnes sub-base and a top surface dressing of tarmac, ● jumps 150 tonnes. as follows: These totals are dependent on the track design ● sub-base of 20mm base coat laid to a and site location, but are a basic guide for spoil compacted depth of 75mm (approximately importation. The larger the track and the more 7 tonnes) jumps or special sections used, the greater the ● top surface 6mm topcoat laid to a compacted requirements for spoil. depth of 25mm (approximately 4 tonnes). 29
You can also read