| 摘要 |
The fire-protection element and contains silicate or gypsum or other fireproof inserts (6) fixed in the hollow interior (4) of the hollow profiles (1,2) or on their outside. The fixtures consist of refined steel pins (7) extending through the self-formed ducts in the wall of the hollow profile and held firmly by the casing surface of the duct. The free end of the part of the pin inside the hollow profile protrudes into the insert. One end of the pins has a flat round head (8). |
