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March.03.2016, By Mohammed Zaid, CEng.M.ASCE
Precast concrete stairs can be used in any application where a stair tower or individual steps are required. They are fabricated either in an Open-Z configuration, in which the upper and lower landings are cast in one piece along with the tread/ riser section, or as shorter components consisting of only the tread/stair section supported by separate landing components.
Precast concrete stairs are used in any application where a stair tower or individual steps are required. These modules can provide fast erection and durable access in buildings or parking structures.
Typical thicknesses: 150 to 250mm, all other thicknesses are valid considering the weight
Casting process: They are typically made as “open-Z” stair components, in which the upper and lower landings are cast monolithically with the tread/riser section. They can also be cast as shorter components, consisting of only the tread/riser section, which is supported by separate landing components that span transversely to the stair section. Stair components are typically cast either “on edge” or “upside down.” The format will depend on the size and the producer’s preferred production method. Abrasive nosing pieces are often cast into the treads to create a non-slip surface.
Finishes: When cast on edge, the tread and bottom remain as cast and typically will remain as such in the final construction. When they are cast upside down, the bottom will be trowelled to the desired degree of smoothness and typically will remain exposed to view in the final construction.
esolution construction & Engineering