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| For a structure to perform well, everything must be analyzed and thought out before its construction when drawing up the plans and specifications, and then things must be done according to the instructions given. It doesn't take much for a structure to have to be redone after a few years of service; one simple deviation may mean failure. (see photo) |
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The construction contractor, in addition to having good equipment and competent, experienced workers, must strictly comply with best construction practices and perform the work in accordance with the plans and specifications.
Construction of a sidewalk requires proper preparation of the site (see the type section). In addition, a careful choice of materials (aggregate, concrete, etc.) and equipment used is important. The concrete must also be made in the best conditions possible. General Building Specifications sums up the main steps to follow when doing work.
Concrete is a rigid material. Sidewalks are exposed to many outside stresses such as: variations in temperature and humidity and foundation settlement that may make them crack. Proper jointing when constructing a sidewalk can control contraction cracks in fresh concrete and ensure long term freedom of movement for the structure. The role of each type of joint is described in the table below..
This concrete's resistance to sulphate is extremely good and effective and municipalities and governments require it in their specifications.
