| 摘要 |
PCT No. PCT/IT95/00130 Sec. 371 Date Jun. 2, 1997 Sec. 102(e) Date Jun. 2, 1997 PCT Filed Jul. 26, 1995 PCT Pub. No. WO96/06240 PCT Pub. Date Feb. 29, 1996The structure comprises cold-formed sections built-up from elementary sections joined stably together by means of connecting braces inside the built-up section; said joined elementary sections define longitudinal slots with their longitudinal lips which are bent inwards and each inclined with respect to that opposite so as to converge towards the interior; fastening devices comprising a channel die and one or more pressure pieces are fitted along the slots in order to clamp with screw means the lips that define said slots and deform them with a locking action. |
