allowable loads for APA rated plywood shear walls 2

[SAGAN]

What are the allowable shear values for wind or seismic loading for wood structural panel shear walls?

The project is under the jurisdiction of the 2001 CBC. Should I be referencing NER-272 for the correct loads?

Thanks.

 

[boo1]

in the states see:

http://www.mcvicker.com/vwall/page015.htm

 

[SAGAN]

Thanks for the great link. Our local building official instructs out to call out the exact diameter and length of the shear nail, not just the typical name (10d, etc). Are the loads listed in the linked table for traditional common nail sizes?
8d=0.131" dia.
10d=0.148" dia.

Thanks.

 

[structuresguy]

You can also download for free all the APA design guides directly from their website

http://www.apawood.org

You will find design guides on shears wall, diaphragms etc....

 

[damstructural]

The table on the mcvicker website is nice, but you should read the footnotes in the CBC as well. For example, Footnote 4 lets you use the 15/32" thickness values for 3/8" plywood, if the studs are 16" oc max (typical).

You also need to be aware of the 3x stud and sill plate requirements in Footnote 3 for Zones 3 & 4.

Per your specific question, the loads in the table are for common nail sizes, which are as you list above. The reason for specifying the diameter is that gun nails come in a wide variety, but I've never been asked to specify the length of an 8d or 10d. Minimum penetration is not usually an issue nailing plywood.

These references are nice, but not a complete substitute for the code.

 

[AlohaBob]

The IBC publishes values for shearwalls. See Tables 2306xxx.

 

[damstructural]

The 2001 CBC is based on the 97 UBC, not the IBC. Perhaps the shear table and footnotes are the same in the IBC and UBC.

FYI
The next generation of California building codes is up in the air. The Building Standards Commission picked the NFPA5000 instead of the IBC, but there has been a large backlash. Its a mess.

California would be about the only jurisdiction in the country to choose the NFPA, with the exception of the city of Pasadena, TX. The plumbers and fire officials seem to like it, but engineers and architects are overwhelmingly against the NFPA and for the IBC.