Basics in Building Construction

Building Components And Types

Lesson 25 : Form Work

Form Work For Stairs

The formwork for stairs consist of stringers, sheets, joists, bearers and vertical posts. The riser forms are supported on cleats which are fixed on stringers or walls as the case may be. The bottom edge of the riser form is chamfered so that concrete can be placed right up to the level of next riser. The sheets rest on joists which are fixed on bearers. The vertical posts support the bearers. Suitable alteration in the formwork is made at the floor level and landing level. The treads are kept open so as to permit the filling of concrete.