The sub base while not mandatory can provide added benefits to the construction and performance of the slab.
Design of ground supported concrete industrial floor slabs. The structural design of a concrete floor slab on. Construction of slabs on ground design considerations based on aci and astm. The british cement association merged with the quarry products association and the concrete centre to form the mineral products association and is now known as mpa cement. Building structure building foundations ground floors publisher history. Bca is part of the concrete society. Concrete slab supported di rectly on foundation soil. Bca is part of the concrete society. Develops the design methods in technical report 550 design of floors on ground.
The sub grade is the ground on which the floor is built. Traditionally ground supported floor slabs have been designed by elastic methods using equations developed by westergaard in the 1920s that are still widely used. A set of general load tables for various types of loading on industrial slabs is provided and a system of loading categories proposed. Concrete industrial ground floors a guide to their design and construction 8 which is the main guidance document available to engineers for the design of industrial ground floor slabs in. The moisture protection is provided for the floor over the slab by means of flooring materials like wood carpet linoleum vinyl impermeable floor coatings adhesives rubber backed carpet tile. Concrete industrial ground floors 8 joints 40 8 1 introduction 40 8 2 joint types 40 8 3 free movement joints 40 8 3 1 purpose 40 8 3 2 sawn free movement joints 40 8 3 3 formed free movement joints 41 8 3 4 wire guidance systems 41 8 3 5 expansion joints 41 8 4 restrained movement joints 41 8 4 1 purpose 41 8 4 2 sawn restrained movement joints 42. The sub base is an optional layer located on top of the sub grade and beneath the slab bottom see figure 1. The use of the general load tables is illustrated by examples.
Unit 571 new smyrna beach fl 32128. These design methods tend to be conservative and so the slabs produced are relatively thick and so assessment of deflections and other in service requirements has not been necessary. Develops the design methods in technical report 550 design of floors on ground. Loads which consist of compa. Information on other aspects su ch as materials construction methods placement of concrete and finishing techniques is.
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