查看单个帖子
旧 2009-09-15, 09:13 PM   #1
huangyhg
超级版主
 
huangyhg的头像
 
注册日期: 04-03
帖子: 18592
精华: 36
现金: 249466 标准币
资产: 1080358888 标准币
huangyhg 向着好的方向发展
默认 self tapping screws thru gyp board

self tapping screws thru gyp board
i have a pump room with a ceiling framed of light gage metal studs and 2 layers of gyp board on the bottom. the mechanical guys are running a 6" pipe below the ceiling. the ceiling is a one hour rated assembly. can i use a self tapping screw in this situation through the gyp board and into the 16 ga metal stud. the screw through the gyp board is unsupported for 1 1/4". are they going to have trouble installing the screw? can i be certain that the screw will obtain its design tensile strength? thanks.
off the top of my head the only requirement i recall is the minimum screw penetration into the metal studs. so long as you achieve that you shouldn't have to reduce the tension capacity. you will most likely be limited by the pullout of the screw anyway.
it has been a long time since i hung drywall to pay the bills but we only ever used regular drywall screws even when it came to hanging sheets on metal framing. i don't think you need any type of self tapping unless the gage is thick.
__________________
借用达朗贝尔的名言:前进吧,你会得到信心!
[url="http://www.dimcax.com"]几何尺寸与公差标准[/url]
huangyhg离线中   回复时引用此帖
GDT自动化论坛(仅游客可见)