The allowable shear stress is $\backslash$tau allow$=9$ ksi.

$($Figure $1)$

Figure$1$ of $1$

A channel beam has two vertical flanges extending downward from the ends of the horizontal web. The thickness of both flanges and the web is $1$ inch. The vertical distance between the top surface of the beam to the bottom surfaces of the flanges is $3$ inches. The horizontal distance between the inner sides of the flanges is $3$ inches. Shear force V acts vertically downward on the midspan of the web of the beam.

Part A

Determine the largest shear force V

that the member can sustain.

Express your answer in kilopounds to three significant figures.