The beam is constructed from two boards fastened together at the top and bottom with three rows of nails spaced every 4 in. Each nail can support a 380 -lb shear force.
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The nails are spaced every 4 inches along the length of the beam. Let \( L \) be the length of the beam in inches. The number of nails in one row is given by: \[ \text{Number of nails per row} = \frac{L}{4} \] Show more…
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