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
Building and Construction Authority build up a skilled workforce, adopt more advanced construction technologies, and enhance building capability in niche areas. BCA strongly promotes the adoption of Building Information Modelling (BIM), which allows professionals to work on a building project digitally before it is built. BCA targets to get 80 per cent of the industry to use BIM widely by 2015, and is working with the public sector to take the lead in driving greater BIM adoptiont. Building and Construction Authority The Building and Construction Authority (Abbreviation: BCA; ) is a statutory board under the Ministry of National Development of the Singapore Government. It