Problem $5\mathrm{.}8.$E A simple beam with a span of $18$ ft supports a uniformly

distributed dead load of $240l\frac{b}{f}t$ and a uniformly distributed live load of

$480l\frac{b}{f}t.$ An $816$ beam of Douglas fir$-$larch of No$.1$ grade is used. Is the

beam safe with regard to bending?

Problem $5\mathrm{.}8.$F Same as Problem $5\mathrm{.}8.$E$,$ except span is $24$ ft $,$ dead load is

$360l\frac{b}{f}t,$ live load is $560l\frac{b}{f}t,$ and the section is a Hem Fir select structural

$1020.$