portal frame
noun
civil engineering building trades a frame, usually of steel, consisting of two uprights and a cross beam at the top: the simplest structural unit in a framed building or a doorway
Words Nearby portal frame
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Browse