noun
: a plate girder having two or more vertical webs with a space between them and solid members joining them top and bottom to form a tube of rectangular cross section with one or more cells
noun
: a plate girder having two or more vertical webs with a space between them and solid members joining them top and bottom to form a tube of rectangular cross section with one or more cells
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012