| 摘要 |
<p>A metal stud for constructing a fire-rated wall and the wall structure formed of a plurality of studs mounted in runners and having at least two spaced-apart layers of wallboard panels with adjacent panels in abutting relationship, the stud being formed of an integral piece of sheet metal and comprising a single layer web having a first plurality of oppositely directed flange means at one edge thereof, a web substantially perpendicular to the flange means, and a panel at the other edge of the web for supporting wallboard panels. Medial portions of the web are struck-out at longitudinally spaced-apart intervals to form a second pair of oppositely directed flange means substantially parallel to and spaced-apart from the first pair of oppositely directed flange means, the first and second flange cooperating with a portion of the web therebetween to define a plurality of oppositely directed channels engaging edges of a first layer of wallboard panels, and a second layer of wallboard panels affixed to the panels of the stud at the other end of the web, the over-all wall structure having excellent fire-rating properties.</p> |
