DISUNITING OF PREFABRICATED STRUCTURES PDF

Gagar Explain the behavior of roof and floor slabs. What are materials used for prefabrication lf What are the different methods used in erection of prefabrication structures? Name of the College: What are the recommendations for the design of staircase slab? What are the IS codal provision? Explain the design of two way systems in floor slabs. Distinguish between site prefabrication and plant prefabrication.

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An 8cm thik plank of porous hollow tiles and its reinforcement. In additional to space brodering and load bearing. In heat insulating and so the application of a separate heat insulating layer is not necessary. Light weight concrete roofing members can only be applied if there is a possibility of their reinforcement.

It requires a bond between the steel and the light weight concrete for ensuring the transmission of the tensile force acting in steel bars to the concrete with the steel bars sliding, hence it is necessary to protect the reinforcement against corrosion.

In the case of prefab structures the steel wires must be embedded in to a concrete the availity of which is at least C The small reinforced-concrete roofing member is essentially a pre cast simply supported, ribbed reinforced-concrete slab. The width of the member is cm The large reinforced-concrete roofing members resting directly on the main girders of structures represents a more advanced kind of pre cast roofing structure.

These members are manufactured in a length corresponding to the spacing of the frames m their width is 1. They are directly supported by the main girders so that purlins are not required. A large roofing member consist of two longitudinal edge ribs, cross, ribs and a slab having thickness of 2.

These members connected to each other and to the frame girders form a unified continuous roofing structure. Flooring members:- In industrial buildings the us of prefab members, for floor consist of precast joints and flooring member.

After the members are placed in final positions a longitudinal load bearing reinforcement and stirrups are placed in the trough formed between the longitudinal ribs of the adjacent member.

A continuous mgh reinforcement is placed on the top of these members, there after a 5cm thick insist concrete layer is cast on the top of the members and the troughs between the longitudinal ribs are also filled u[p with concrete. In this way the slab is transformed in to a span of 6. Flooring members to be used for smaller loads similarly to roofing members can also be made of lightweight concrete.

These members are used chiefly in houses and public buildings. The flooring members rest in general joists i.

The weight of flooring members should not exceed 5 tons otherwise the storage and transportation as well as the placing of these members using the presents available equipment would be difficult.

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