| 摘要 |
A novel outline for section irons to be used in truss girders and like constructions is disclosed, which essentially consists of a box-like open structure composed by a longer angle iron (11, 11a) from the free end of which there are extended, at right angles outwards, L-shaped extensions (12, 13, 12a, 13a) having sides equal to one half of those of the angle iron. Bending stresses can be minimized and the entire structure is more conveniently assembled and has a reduced weight.
|
