Deflection

A beam has a simple span of $20ft$ and

supports a dead load including its own

weight of $1\frac{k}{f}t$ and a live load of $0\mathrm{.}7\frac{k}{f}t.$

$f_c=3000,E_C=3,600,000,n=9.$

$($a$)$ Calculate the instantaneous

deflection for $D+L$

$($b$)$ Calculate Total deflection after

$5$ years $($DL is sustained$)$

w $\frac{k}{f}t$