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
American College of the Building Arts also specialized courses in drawing, design, materials science and construction management. ACBA maintains a low student-to-faculty ratio to ensure the highest standards of quality in its programs. The Byrne-Diderot Library is a major research resource for students and faculty. The library houses a specialized collection of books, periodicals, newspapers and audiovisual materials in the building, visual, decorative and liberal arts. The library's main collection contains over 6.500 items. The D.A.R. Special Collections room contains another 500 rare books, catalogs and periodicals, as well as examples of historical tools and 19th century Charleston iron work. American College of the Building Arts