| 摘要 |
Timber elements can be connected by means of screws and/or nails to the support in order to erect wall and floor shutterings, emergency roofs, water-channel shutterings and tunnel shutterings, ditch bracings, etc. The cross-section of the support is in the shape of a U, one leg (3) being lower than the other and having a flange (5) which projects inwards at right angles and is connected to the other leg (4) by welded-on transverse webs (2). The support has a multiplicity of punched-out holes (7,8,9,11), which serve to reduce the weight, and holes (12-16) which serve for the passage of nails or screws. <IMAGE> |
