Download e-book for kindle: Concrete Formwork Systems (Civil and Environmental by Awad S. Hanna

By Awad S. Hanna

ISBN-10: 0824700724

ISBN-13: 9780824700720

Deals insights on currently-used concrete formwork buildings, from category, process parts and fabrics' homes to choice and building standards and techniques, whereas contemplating product caliber, labour, protection and monetary components all through. The textual content info hand-set, crane-dependent and crane-independent structures.

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Additional resources for Concrete Formwork Systems (Civil and Environmental Engineering) (Civil and Environmental Engineering Series, Vol. 2)

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However, they do not take into consideration stress modification factors that are provided by the National Design Specification for Wood Construction, NDS 1991. This chapter presents a design procedure for all-wood concrete slab forms based on NDS 1991 and Plywood Design Specification 1997. The objective of the formwork design is to determine the safe spacing for each slab form component (sheathing, joists, stringers, and shores), and ensure that each component has adequate strength to resist the applied pressure without exceeding predetermined allowable deflection.

Steel forms are typically patented, and allowable loads are generally published by the manufacturers. 3 Aluminum Aluminum has become an increasingly popular material for many formwork applications such as lightweight panels, joists, horizontal and vertical shoring, and aluminum trusses for flying forms. The popularity of aluminum stems from its light weight which reduces handling costs and offsets its higher initial material cost. When compared to steel panels, aluminum panels used for ganged forms weigh approximately 50 percent less.

Higher quality of labor force and supervision. Conventional formwork systems work best with a high-quality labor force and adequate supervision. In areas with an unskilled or semiskilled labor force and minimal supervision, more sophisticated formwork systems are more appropriate. Limited spans. Since dimension wood is low strength compared to that of aluminum and steel sections, it has limited use in applications where long spans are desired. Advantages of Conventional Wood System Despite the limitations of the conventional wood system, it has a few distinct advantages.

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Concrete Formwork Systems (Civil and Environmental Engineering) (Civil and Environmental Engineering Series, Vol. 2) by Awad S. Hanna


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