The roof over a 7.0-m × 10.0-m room in a school has a
Chapter 3, Problem 78GP(choose chapter or problem)
Problem 78GP
The roof over a 7.0-m × 10.0-m room in a school has a total mass of 12,600 kg. Tire roof is to be supported by vertical “2 × 4s” (actually about 4.0 cm × 9.0 cm) along the 10.0-m sides. How many supports are required on each side, and how far apart must they be? Consider only compression, and assume a safety factor of 12.
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