Problem $5\mathrm{.}8.$G A $1018-$in$.$ beam of Douglas fir$-$larch, dense No$.1$ grade,

is used for a $16-$ft span. The beam supports a uniformly distributed dead

load of $160l\frac{b}{f}t$ and three concentrated live loads of $4$ kips each at the

quarter points of the span $(4$ ft on center$).$ Is the beam safe with regard

to bending?

Problem $5\mathrm{.}8.$H Same as Problem $5\mathrm{.}8.$G$,$ except the dead load is $240l\frac{b}{f}t,$ the

live load is $6$ kips $,$ the span is $20$ ft $,$ and the section is a Hem Fir No$.11220.$