PROBLEM NO $2(35$ points$)($cont$.)$

GIVEN:

One story warehouse with concrete walls and wood frame roof.

Roof LL $=20$ psf$,$ Roof DL $=15$ psf$,$ Skylight DL $=15$ psf $($same as roof$)$

Wall DL $=90$ psf

$Cs=0\mathrm{.}3$

DETERMINE:

Determine diaphragm loading $($LRFD$)$ from building seismic force in North$-$South direction. $(5$ points$)$

Sketch diaphragm beam with all supports and seismic loading shown $(3$ points$),$

a$)$ Draw Shear diagram between gridlines $1$ and $4,(3)$

b$)$ determine Max Shear $(3)$

c$)$ draw Unit Shear diagram between gridline $1$ and $4(3)$

d$)$ determine Max Unit Shear $(3).$

Select structural sheathing, fasteners size and spacing at a maximum unit shear location between gridlines $1$ and $4.(5$ points$)$

Determine how far from gridline $1$ can nailing spacing be changed to $15/32-$ Str I @ $6-6-6(5$ points$)$

Determine Maximum Chord Forces between gridlines $1$ and $4.(5$ points$)$