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A precast stadium terrace unit is a stepped concrete element that forms the spectator seating tiers of stadiums and sports facilities. Made in the plant and placed on raking beams, it provides the seating surface and the structural floor in one piece.
A precast stadium terrace unit is a precast concrete element with an L-shaped or stepped section, supported at each end on sawtooth raking beams. Placed one after another along the beams, the units form the steps on which spectators sit and walk.
Terrace units are used in football stadiums, athletics grounds, indoor sports halls, racecourses, open-air theatres and school sports grounds. The unit acts as a floor slab, carrying spectator loads and its own weight to the raking beams, while also providing the finished seating and walking surface. As a result, separate screeds or finishes are often not needed.
Terrace units can be single steps or combine two or three steps in one piece. Step height and depth are set by sightline calculations, so that every spectator can see the pitch comfortably. The design also covers cast-in fixings for seats, aisle steps, falls on the treads to shed rainwater and the waterproofing of joints between units. Span, section and reinforcement are set in the structural design according to beam spacing and loads.
Terrace units are produced in steel moulds made to the step dimensions in the design. After the reinforcement and cast-in parts are placed, the concrete is compacted by vibration and cured under controlled conditions. Care is taken with the mould surface and the concrete mix so that exposed faces are smooth and consistent. Each unit is checked individually for dimensions, surface quality and the position of cast-in parts.
Units are delivered in erection sequence and lifted by crane onto the bearings on the raking beams. Joints between units are sealed with waterproofing materials after erection. Because formwork and falsework are largely eliminated compared with an in-situ stand, the stand is ready for use in a short time. Seats, balustrades and other fittings are then fixed to the cast-in parts.
A terrace unit is not designed in isolation; it is part of a system that works together with the columns, raking beams, stairs and the spaces beneath the stand. Where the area under the stand is used for changing rooms, storage or plant rooms, the underside of the units forms their ceiling, making joint waterproofing and surface appearance all the more important. Handling the whole structure in a single design keeps connection details compatible and helps erection run smoothly.
Dimensions, reinforcement and load capacity are set by structural design for each project; contact us for technical details.
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