Framing members in plywood shearwalls

[EPSTR]

Using the 2000 IBC code and current NDS standards.
Can built-up 2x members be substituted for the situations where a 3x member is required per code to achieve the allowable shearwall design values?
i.e. (2)2x6 studs in place of a 3x...
this would ofcourse assume that the built-up studs are properly connected.

any suggestions or interpretations of the code commentary would be greatly appreciated.

Thank you

 

[bylar]

This issue has previously been discused.
Do a search.
There is a paper referenced that addresses the issue but I don't have the site address.

 

[bylar]

see summing shear capacities in Moment frame and shear wall engineering

 

[JAE]

I don't think you can substitute 2 - 2x for a 3x member. The primary purpose of requiring the 3" is to avoid wood splits from closely spaced nails, which wouldn't be helped by going to 2 -2x.

 

[boo1]

Check the following refs
TT-076 Shear Wall Lumber Framing (provided by rockengineer)
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http://www.apawood.org/level_c.cfm?content=pub_tch_libmain

>;

FEMA 450 Commentary (2003 NEHRP Commentary), Section 12.2.3.11 and 12.2.3.12 on page 237

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http://www.allendesigns.com/SWPanelJoint.htm>