Engrman
Structural
- Apr 2, 2002
- 54
I asked this in the Moment-Frame and Shear Wall group but so far no coments.
I have a 2 story (25'-0" mean roof height) wood framed apartment project with 144'-0"x60'-0" plan dimensions. 1997 UBC, Seismic Zone 1, 85 mph wind, Exp. C. All upper and lower level exterior walls with the exception of the north lower level longitudinal (144'-0")wall meet the prescriptive requirements of Division IV - Conventional Light Frame Construction. The northern lower level area is where the garages are located. Therefore, the north wall is a series of 2'-2" wall panels with 9'-0" garage doors between. Floor-to-floor height is 10'-6" with 18" deep floor structure. The transverse walls, both exterior and interior all conform to Div. IV, although the garage separation walls are out as much as 6'-0" with the unit speration walls above (this may not be a requirement with prescriptive design but it still bugs me). Can I use the APA Portal Frames on the north lower level wall and still conform to Div. IV or is an engineered lateral-force-resisting system required?
I have a 2 story (25'-0" mean roof height) wood framed apartment project with 144'-0"x60'-0" plan dimensions. 1997 UBC, Seismic Zone 1, 85 mph wind, Exp. C. All upper and lower level exterior walls with the exception of the north lower level longitudinal (144'-0")wall meet the prescriptive requirements of Division IV - Conventional Light Frame Construction. The northern lower level area is where the garages are located. Therefore, the north wall is a series of 2'-2" wall panels with 9'-0" garage doors between. Floor-to-floor height is 10'-6" with 18" deep floor structure. The transverse walls, both exterior and interior all conform to Div. IV, although the garage separation walls are out as much as 6'-0" with the unit speration walls above (this may not be a requirement with prescriptive design but it still bugs me). Can I use the APA Portal Frames on the north lower level wall and still conform to Div. IV or is an engineered lateral-force-resisting system required?
