| 摘要 |
<p>In connection with a corrugated sheet metal strip (30) which is suitable as a web strip in construction elements consisting of an upper and a lower flange (202, 203) taking the form of nailable boards and/or timber bonded together by one or more web strips (204), extending edgeways between the flanges and penetrating the latters with teeth which are mutually spaced on the longitudinal edges of the strip, there are suggested means to ensure a correct predetermined penetration depth of the teeth, independent of the different penetration resistance yielded by either flange. The construction element comprises corrugated sheet metal strips (30) which are provided with penetration stoppers (31) which at a predetermined correct penetration depth of the strip teeth prevent further penetration into the flange (35b). The penetration stoppers (35) can take the form of stationary elements integral with the web strip (30) or consist of separate elements attachable thereto. Further, the stoppers may be constituted by sections or positions of the web strip which during the penetration will have their original shape (32, 33) changed so as to form a stopping foot (35a), the portions then preferably comprising appropriate weakened lines so as to facilitate the folding thereof.</p> |
