IBC Allowable Shear in Shear Wall Tables
IBC Allowable Shear in Shear Wall Tables
(OP)
Question regarding how to interpret Tables 2306.4.5 (Allowable Shear in Shear Walls) in IBC '06:
Are allowable shears given in the table assuming only one side of the wall is sheathed?
For example – let's say you have shear wall sheathed with 5/8" gyp board (single ply), blocked, fastened 7" maximum. Table gives a value of 145 plf. If we have a shear wall that is that sheathed on both sides with 5/8" gyp board, is the allowable shear 290 plf?
Thanks!
Are allowable shears given in the table assuming only one side of the wall is sheathed?
For example – let's say you have shear wall sheathed with 5/8" gyp board (single ply), blocked, fastened 7" maximum. Table gives a value of 145 plf. If we have a shear wall that is that sheathed on both sides with 5/8" gyp board, is the allowable shear 290 plf?
Thanks!






RE: IBC Allowable Shear in Shear Wall Tables
RE: IBC Allowable Shear in Shear Wall Tables
not necessarily - the required tie downs and the adequacy of the studs may come into play.
RE: IBC Allowable Shear in Shear Wall Tables
Like csd72 mentioned, you still need to design for the anchorage and the diaphragm unit shear as well to ensure that you can utilize the full shear capacity of the weall sheathing.
RE: IBC Allowable Shear in Shear Wall Tables
Ane for walls with three sides, you can triple the values!! (just kidding).
Mike McCann
MMC Engineering
RE: IBC Allowable Shear in Shear Wall Tables
But the third and fourth sides of a 2x6 wall usually don't meet the height to width ratio, (unless you are still working on that dog house).
akastud