ATE: ON$/1$B$/202$A

CE $537.$ TIMBER AND MASONRY DESIGN $(4$ UNITS$)$

BLEM #$2$

MIDTERM EXAM #$2$ I DATE: $\frac{04}{16}\frac{?}{2024}$

ren:

The $1-$story building per Figure $B.$

$L={100}^{\text{'}}$;$B={50}^{\text{'}}$;$w_T=w_U={400}^{PLF}$

$$ For the transverse strength level

seismic force $($Figure B$),$ the pan:

layout is load Case $1.$

$>$ Roof sheathing is $\frac{15}{32}"($Nominal

Thk$.)$ Structural $-$ I Plywood.

$>$ Nails are $10d$ common.

$>$ Minimum Nominal Width of Nailed

face at Supported Edges and

Boundaries $=2"$

$>$ HDR BM $=$ Header Beam

Find:

A$.$ Reactions $R_{U1}$&$R_{U2}$

$(5$ points$)$

B$.$ Unit Shear adjacent to Grids $1$&$2(V_{{?}_1}$&$V_{U2})$ in PLF $-$ Strength level. $(7$ points$)$

C$.$ Unit Shear adjacent to each shearwall $v_1$&$v_2$ in PLF $-$ ASD level. $(3$ points$)$

D$.$ Diaphragm Aspect Ratio $($DAR$)$ for the diaphragm spanning between Grids $1$ & $2$ and compare it with DAR requirements per $2015$ SDPWS Table $4\mathrm{.}2\mathrm{.}4.(4$ points$)$

E$.$ Design Roof Diaphragm spanning between Grids $1$ & $2$ in transverse direction: provide full diaphragm design specification, including fastener spacing, statement if the diaphragm is Blocked or Unblocked & diaphragm capacity $($ASD$).$ Avoid blocked diaphragm as $/$ if possible. $(11$ points$)$

F$.$ Maximum Chord Force T $($ASD level$)$ due to seismic force in transverse direction. $(10$ points$)$

G$.$ Collector Forces & Plot Collector Force Diagram $($ASD Level$),$ for the beginning & ends of each shearwall & HDR BM along Grid $1.q,$

NOTE: As $/$ if desired by the student$($s$),$ Problem #$2$G worksheet $($see page $10$ of $10)$ can be alternatively used to plot collector force diagram, detached and submitted with the Midterm Exam #$2$ solutions.

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