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The underside of a waffle slab, showing the grid like structure. 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. [1] The name waffle comes from the grid pattern created by the reinforcing ribs.
Waffle slab foundations adhere to International Building Code requirements. By 2008, most states put into effect the changes adopted in the 2006 IBC and, in regards to foundations, the on-grade mat foundation has become a more attractive design because, as an engineered system, it already accommodates the 2008 design recommendations, and required no major modifications to bring it into compliance.
Ribbed slabs have higher load ratings than corrugated or flat slabs, but are inferior to waffle slabs. [15] A waffle slab gives added strength in both directions using a matrix of recessed segments beneath the slab. [16] This is the same principle used in the ground-bearing version, the waffle slab foundation. Waffle slabs are usually deeper ...
This enables the slab to effectively resist both positive and negative bending moments. [2] Since the underside of the slab is flat it may be finished to create an interior ceiling, in contrast to the contoured underside of waffle slabs. A box-shaped voided slab structure
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In geometry, a slab is a region between two parallel lines in the Euclidean plane, [1] or between two parallel planes in three-dimensional Euclidean space or between two hyperplanes in higher dimensions.
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