Folded Concrete Roof Slab

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.

Folded concrete roof slab.

The first three sections which were cast employed concrete inserts. Placing concrete in one of two roof forms consisting of a series of wood trusses sheathed with 3 4 inch marine plywood. Pyramidal roof slab 4. Slab supported on two sides and bending takes place predominantly in one direction only is called one way slab.

Slab supported directly by columns are called flat slab. The building was designed in the shape of an octagon incorporating 8 separate gables each engineered as a folded slab. The slab which provided above the door for storage purpose is called low roof slab. This type of slab is closed at all ends and open at one end.

Flat slab supported directly on columns without beams. These types of concrete slabs are used in houses. This slab lies below the actual slab and above the door sill level. Structures in folded slab england and america illustrate use of folded slabs in a wide variety of shapes.

Folded slab roofs concrete construction. Two way slab 3. Exact specifications vary but most concrete roofs are several inches thick. Planar roof slab the planar roof slabs are further classified as follows.

Reinforcement detailing of a slab is done based on its support conditions. 4 inch into the roof slab after concreting these channels retain the insulation and serve as attachment. Domes concrete shell roofs 2. But bermudez says the.

Waffle slab grid slab 5. Each 4 inch thick section covered 400 square feet and weighed 11 tons. 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. For example the florida based company hurricane proof systems offers a 7 inch 18 centimeter slab of concrete in three layers.

Folded plate design structurally these roofs are folded plates so they require an engineer ing design. Slab may be supported on walls or beams or columns. On the other hand when. A concrete roof is exactly what it sounds like.

Beam action of the fold or quoin is explained. Roof concrete right retained the concrete for the final layer. As a folded slab. Precast elements prestressing and composite construction precast with cast in place concrete are shown as they apply to construction.

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. 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. One way slab 2. 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.