Ribbed Floor Reinforced Concrete

The ribs are usually tapered and are uniformly spaced at distances that do not exceed 750mm.

Ribbed floor reinforced concrete. The 2 inch thick slab is reinforced with 6x6 w1 4xw1 4 wire mesh and rib reinforcement consists of one number 6 bar placed with 3 4 inch of clear cover at the bottom of the rib. Ribbed slab is a type of reinforced concrete slabs in which some of the volume of concrete in the tension zone is removed and replaced with hollow blocks or left as voids. The ribs are supported on girders that rest on columns. Ribbed floors consisting of equally spaced ribs are usually supported directly by columns they are either one way spanning systems known as ribbed slab or a two way ribbed system known as a waffle slab.

Ribs are spaced 3 feet 6 inches on center and have tapered sides. Ribbed and waffle slabs they provide a very good form of construction where slab vibration is an issue such as laboratories and hospitals. Ribbed waffle slab system. Between the ribs the slab is usually reinforced with a common wire mesh.

This reduction in the volume of concrete in the tension zone below the neutral axis is based on the assumption that the tensile strength of concrete is zero hence all the. The economical reinforced concrete floor span l is approximately d x 15 for a single span and d x 22 for. The rib reinforcement follows the same rules with the beam reinforcement. Concrete compressive strength required is 3000 psi.