Basics in Building Construction

Building Components And Types

Lesson 21 : Upper Floors

Filler Joists Floors

This is a typical type of composite constructions in which R.S.J. of small sections are placed in concrete, as shown in figure 7.

The spacing of the joists may vary between 40 to 90 cm. The filler joists may either rest on walls (if the span is less) or on longitudinal steel beams. The joists act as reinforcement, and no separate reinforcement is provided in the concrete filled in between the joists. Concrete should completely surround the filler joists and steel beams, with a minimum cover of 2.5 cm over filler joists.