Step 1:
Modular construction employs high volume assembly lines to reduce costs, improve quality and consistency, and dramatically reduce the time it takes to construct a new home.
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Step 2:
Highly trained workers man ‘work stations’ and install and complete prefabricated components produced ‘off-line’ in other areas of the factory. ‘Just in time’ arrival of components such as windows and doors produced by others further improves efficiency and streamlines cost.
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Step 3:
Environmentally controlled factories allow the sequence of assembly to be altered substantially to improve working conditions and productivity. Bathroom fixtures, furnaces, water heaters, floor coverings, etc. are all installed before the walls and roof structure are put in place. The sequencing of assembly on ‘site-built homes’ is dictated by the weather. That means that rather than focusing on working conditions and construction efficiencies, the focus is on building and weather proofing the walls and roof to repel rail, snow and cold temperatures.
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Step 4:
At every stage of production all work is inspected, and if remedial work is required, it is corrected before the home moves down the assembly line.
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Step 5:
Factory building provides for economies of scale which allow homes to be built more efficiently; therefore, generally more affordable then site built construction.
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Step 6:
Modular buildings are designed to be placed on basements, crawl spaces, pilings and other foundations compliant with the Alberta Building Code (ABC) in the case of homes sold for final location in Alberta and to the National Building Code for homes sold for final location in Saskatchewan and Manitoba.
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Step 7:
Alternatively, buildings may incorporate steel or wood longitudinal sub-frame rails which have been designed for placement on permanent surface foundation systems.
The CSA Z240.10.1 National Standard accommodates a range of surface foundation options designed to support this type of building.
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