Folded Concrete Roof Slab

Slab may be supported on walls or beams or columns.

Folded concrete roof slab.

Samuely discusses design principles for folded slab roofs stair landings and galleries with special attention to shear forces and to stresses produced by differential deformation in the slabs. Structures in folded slab england and america illustrate use of folded slabs in a wide variety of shapes. The building was designed in the shape of an octagon incorporating 8 separate gables each engineered as a folded slab. Waffle slab grid slab 5.

The first three sections which were cast employed concrete inserts. Flat slab supported directly on columns without beams. Reinforcement detailing of a slab is done based on its support conditions. Folded plate design structurally these roofs are folded plates so they require an engineer ing design.

Beam action of the fold or quoin is explained. Folded slab roofs concrete construction. Exact specifications vary but most concrete roofs are several inches thick. Pyramidal roof slab 4.

The slab which provided above the door for storage purpose is called low roof slab. Circular slab non planer roof slab. On the other hand when. This slab lies below the actual slab and above the door sill level.

Planar roof slab the planar roof slabs are further classified as follows. Due to the difficulty of holding these inserts in place during casting one half inch steel plates threaded to receive three fourths of an inch bolts from the lifting apparatus were substituted for the remaining sections. Domes concrete shell roofs 2. Placing concrete in one of two roof forms consisting of a series of wood trusses sheathed with 3 4 inch marine plywood.

Slab supported on two sides and bending takes place predominantly in one direction only is called one way slab. Precast elements prestressing and composite construction precast with cast in place concrete are shown as they apply to construction. These types of concrete slabs are used in houses. As a folded slab.

This allowe d the casting of four sections of the roof on each form using the lift slab p r inciple of stacking one slab on top of the other. Roof concrete right retained the concrete for the final layer. For example the florida based company hurricane proof systems offers a 7 inch 18 centimeter slab of concrete in three layers. In order to re d u c e both labor and materials for form ing two forms we r e constructed on the ground utilizing a series of wood trusses sheathed over with 3 4 inch marine plywood.

Slab supported directly by columns are called flat slab. A concrete roof is exactly what it sounds like. The continuous slab is folded at at least one beam defining path across its planar supporting surface and preferably includes a right angle grid of such folds with downward peripheral folds at the. One way slab 2.

But bermudez says the. Two way slab 3. Slabs are classified as. Each 4 inch thick section covered 400 square feet and weighed 11 tons.