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UBC & IBC wood panel on steel stud shearwalls - acceptable steel Fy and thickness

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UBC & IBC wood panel on steel stud shearwalls - acceptable steel Fy and
thickness:

97 UBC Table 22-VIII-C note 3 indicates steel framing needs to be ASTM A 653
SQ grade 33 and should have an uncoated base metal thickness less than .043"
.  2000 IBC 2211.2.1 note 1 indicates "...shall be of the following grades
of structural quality steel: ASTM A 653 SS Grade 33, ASTM A 792 SS Grade 33
or ASTM A 875 SS Grade 33."

The 97 UBC appears to limit you to 18 and 20 gauge studs galvanized SQ
"structural quality" studs with Fy=33 ksi.  The 2000 IBC appears to limit
the steel to Fy=33 ksi and 18 gage minimum. 

Is 50 ksi framing ok?  Are 16 gauge studs ok?   Why?  Why not?  What does
the SS mean in the ASTM designation?  Which state is the second largest next
to Alaska?


Thanks!

Scott M Haan P.E.
Plan Review Engineer
Building Safety Division 
Development Services Department
Municipality of Anchorage
http://www.muni.org/building
phone:907-343-8183  
fax:907-249-7399
mailto:haansm(--nospam--at)ci.anchorage.ak.us



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