Education: No degree, certificate or diploma. Work setting: Various locations. Tasks: Prepare estimates of labour and/or material costs. Read blueprints, drawings and sketches to determine work requirements. Prepare layouts in conformance to building codes, using measuring tools. Measure, cut, shape, assemble and join materials made of wood, wood substitutes, lightweight steel and other materials. Build foundations, install floor beams, lay subflooring and erect walls and roof systems. Fit and install windows, doors, stairs, mouldings and hardware. Schedule and co-ordinate work on sites. Survey building locations and levels. Instruct apprentices. Supervise other workers. Estimate costs and materials. Experience: 1 year to less than 2 years.