Cold-Formed Steel (CFS) Stud Shear Wall

[BSVBD]

Please see attached AISI Table C2.1-1

The building is using 5/8" exterior sheathing over CFS studs.

The AISI Table C2.1-1 doesn't have values for 5/8" sheathing.

It's obvious that 5/8" is stronger than 15/32 or 7/16. But, since that IS the case, why wouldn't the table either give values for the 15/32 for the 4, 3 or 2" spacing, or at least provide a footnote stating that the 7/16" values may be used for 15/32" or thicker sheathing.

Is there a rule I am not aware of that would not allow a thicker material or something else I am not considering?

Thank you!

 

[Aesur]

It is my understanding that the reason values are not provided for 5/8" sheathing is because the fasteners start controlling the shear capacity at 15/32" thickness, therefore anything thicker does not result in higher capacities. I am not aware of any special considerations when using thicker sheathing as long as you meet the minimum installation requirements, like thread penetration/engagement.