Waffle Roof Openings Dimension Details

2 12 where h rib 3 14 12 5 in.

Waffle roof openings dimension details.

This is basically a cad dwg drawing with a typical waffle slab cross section reinforcement detail. Waffle slabs are preferred for spans greater than 40 feet 12 m as they are much stronger than flat slabs flat slabs with drop panels two way slabs one way slabs and. The drop panel depth for two way joist waffle slab is set equal to the rib depth. The equivalent drop depth based on moment of inertia d mi is given by.

Rib spacing of 600 to 1500 mm can be used. Buying a york curb ensures that this data is included with each unit. Dimensions weight component details cross braces supply return opening layout dimensions and notes which are unique to each unit. Overall dimension of waffle slab used are 1552 x 1552 mm orthogonally spanning ribs have a dimension of 52x75mm and the ribs are placed at 300 mm center to center.

The overall depth of the floor typically varies from 300 to 600 mm with overall spans of up to 15 m if reinforced longer if post tensioned. The waffle slabs are modeled using a scale ratio of 1 4 representing a real span of 6m. Spslab software manual eq. D h h mi mi rib 12 5 17in.

Spacing of ribs recommended is 600 to 1500 mm. A waffle slab or two way joist slab is a concrete slab made of reinforced concrete with concrete ribs running in two directions on its underside. Slab depths typically vary from 75 to 125 mm and rib widths from 125 to 200 mm. The name waffle comes from the grid pattern created by the reinforcing ribs.

The reinforced concrete waffle slab ribbed slab cross section reinforcement detail comprises ribbing beams reinforcement slab top wire mesh waffles dimensioning voids width and depth slab thickness. The width of beams or ribs provided in waffle slab are generally 110 to 200 mm.