Thermal conductivity common use in the construction and textile industries. The construction industry makes use of units such as the R-value (resistance) and the U-value (transmittance). Although related to the thermal conductivity of a material used in an insulation product, R- and U-values are dependent on the thickness of the product. Likewise the textile industry has several units including the tog and the clo which express thermal resistance of a material in a way analogous to the R-values used in the construction industry. There are a number of ways to measure thermal conductivity. Each of these is suitable for a limited range
Trade Unions International of Building, Wood, Building Materials and Allied Industries Trade Unions International of Building, Wood, Building Materials and Allied Industries The Trade Unions International of Building, Wood, Building Materials and Industries, also known as the Trade Unions International of Construction, Wood, Building Materials and Industries, or by its French acronym UITBB ("Union internationale des syndicats des travailleurs du bâtiment, du bois et des matériaux de construction") is a Trade Union International affiliated with the World Federation of Trade Unions. The UITBB was founded at a conference in Milan in 14–16 July 1949. The highest organization is the Conference which meets every 4 years. Between conferences, the union is run