Breyer $7\mathrm{.}5.$ The truss used in Problem $1$ has a $26$ lower chord of No$.1$ DF$-$L$.$ In addition

to the loads specified in Problem $1,$ the lower chord supports a ceiling dead load of $5$ psf$.$

There is no reduction of member area for fasteners. Joints are assumed to be pin$-$connected.

$C_M=1\mathrm{.}0,C_t=1\mathrm{.}0,$ and $C_i=1\mathrm{.}0.$ Assume the ends of the bottom chord are held in place to

prevent lateral rotation $($twisting$).$

Find:

$($a$)$ Check the combined tension and bending in the member using ASD