Glossary

Construction Dictionary and Glossary of Construction Terms

All | | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | R | S | T | U | V | W

Term	Definition
U of C	University of California, an independent fire-testing laboratory.
U Value	Coefficient of heat transfer, "U" equals 1 divided by (hence, the reciprocal of) the total of the resistances of the various materials, air spaces and surface air films in an assembly. See Thermal Resistance.
UBC	Uniform Building Code -- document promulgated by the International Conference of Building Officials.
UL	Underwriters Laboratories Inc., founded by NBFU, and now operated in affiliation with American Insurance Assn. UL is a not for profit laboratory operated for the purpose of testing devices, systems and materials as to their relation to life, fire and casualty hazard in the interest of public safety.
USASI	United States of America Standards Institute, now American National Standards Institute.