Question: 1 4 . 4 4 A box beam is built up of four 1 - in . - by - 6 - in . boards

14.44 A box beam is built up of four 1-in.-by-6-in. boards as shown. The beam is subjected to a maximum vertical shear force of 920 lb. Calculate the required spacing of wood screws if the allowable shear load on each screw is 250 lb.

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