Construction of stairs is one of the critical execution phase as it consumes heavy reinforcement. Precast stairs is an ideal alternative for traditional staircases as they do not need supporting framework and fixing which is mandatory for cast in situ stairs. Steel angle joints are used to connect the precast units with the floors and landings. Continuous halving joints and intermittent halving joints are some types of connections that are occasionally used depending upon the type of staircase. If desired, a combination of stairs and landings can also be made available (Stresscrete,2004). As the precast stairs are installed, they permit immediate, safe access to upper floors for following trades. Precast stairs are especially cost effective when they are repeated. More the number of identical units, the lesser is the amount of work in manufacturing the units.
Requires less on-site duration for erection.
• An instant working platform for the project is ready to sustain the load when the unit is installed in its final location in the project.
• Various architectural finishes like carpet can be accurately formed in the controlled factory manufacturing conditions.
• Extraordinary standard of finish to all concrete surfaces can be maintained.
Greater stiffness and fire resistance is available with the usage of concrete for stairs in comparison to steel finishes. Architectural finishes can easily be incorporated.