511C.6 Shear Walls (In-Plane Loading).

511C.6 Shear Walls (In-Plane Loading).

511C.6.1 Wall story force. The wall story force distributed to a shear wall at any diaphragm level shall be the lesser value calculated as:

1. For buildings without crosswalls:

Fwx = 0.132(Wwx+Wd /2) (5C-11)

but need not exceed

Fwx = 0.132Wwx+vuD (5C-12)

2. For buildings with crosswalls in all levels:

Fwx = 0.1(Wwx+Wd /2) (5C-13)

but need not exceed

Fwx = 0.1[Wwx+ ΣWd(vuD/ ΣΣvuD)] (5C-14)

and need not exceed

Fwx = 0.1Wwx+vuD (5C-15)

511C.6.2 Wall story shear. The wall story shear shall be the sum of the wall story forces at and above the level of consideration.

Vwx = ΣFwx (5C-16)

511C.6.3 Shear wall analysis. Shear walls shall comply with Section 512C.

511C.6.4 Moment frames. Moment frames used in place of shear walls shall be designed as required in San Francisco Building Code Chapter 16 except that the forces shall be as specified in Section 511C.6.1 and the story drift ratio shall be limited to 0.005, except as further limited by Section 512C.4.2.