Struc"tur*al shape. (Engin. & Arch.)
The shape of a member especially adapted to structural purposes, esp. in giving the greatest strength with the least material. Hence, Colloq.,
any steel or iron member of such shape, as channel irons, I beams, T beams, etc., or, sometimes, a column, girder, etc., built up with such members.
© Webster 1913