Thanks. I was just reiterating the requirements from the code. Last night I was able to locate some dimensions on the internet. It appears that it is a #8 flat head screw. that is the minimum head diameter allowed. it appears that a #8 flat head can have up to a .332" diameter. close to the 3/8" you are talking about.
Jim
On 5/23/07, Robert Kazanjy <rkazanjy@gmail.com> wrote:
Jim-
That's a pretty small head diameter for a self driller / tapper for use in plywood
A number of years ago we did plywood shear wall (CoLA Shear Test Program) over steel studs & I recall that the screw heads were more like 3/8" or even larger.
I don't have the data readily available due to a crash ......... archived somewhere
Maybe the specs have been changed but it seems to me that a bigger head (3/8 or 7/16) would be better than .292" . A head dia of .292 seems pretty skimpy.
The screws were #8's or 10's
cheers
BobOn 5/22/07, Jim Bessley < jbessley@gmail.com > wrote:I am trying to design a shearwall using the 2003 IBC for plywood sheathing over light gage metal studs. the code says that the screws should be self drilling and tapping screws with a .292" head diameter. I can't find the screw size that correlates to this head diameter. Can anybody out there help me.
thanks,
Jim Bessley