prescriptive conventional light-frame construction
 

prescriptive conventional light-frame construction
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?