A double tee cross section is used for the beam shown below. Assume the following lengths and loads:

$a=15ft$

$b=8ft$

$c=11ft$

$P=13500lb$

$Q=5000lb$

The moment of inertia of the cross section is $I_z=110in.{?}^4.$ Determine the magnitude $($i$.$e$.,$ the absolute value$)$ of the maximum tensile bending stress in the beam.

Answer:

${}_{\text{m}\text{a}\text{x}}($ Tension $)=$

$$

psi