R-value (insulation) as ASHRAE 90.1 and the IECC prescribe U-values. However, R-value is widely used in practice to describe the thermal resistance of insulation products, layers, and most other parts of the building enclosure (walls, floors, roofs). Other areas of the world more commonly use U-value/U-factor for elements of the entire building enclosure including windows, doors, walls, roof, and ground slabs. The SI (metric) unit of R-value is whereas the I-P (inch-pound) unit is For R-values there is no difference between US customary units and imperial units, so the same I-P unit is used in both. Some sources use ″RSI″ when referring
Office of the Australian Building and Construction Commissioner of entitlements for those working in the building and construction industry. In 1997 the Australian Government put in place a National Code of Practice for the Australian building and construction industry. In order to be eligible to work on Australian Government building and construction projects businesses must be compliant with the National Code of Practice. The National Code and Guidelines encourage a culture of best practice workplace relations and the compliance to all legal obligations and ethical tendering requirements. A sham contract is where an employer deliberately disguises an employment relationship as an independent contracting arrangement, instead of engaging the