Solved: The roof over a 9.0-m X 10.0-m room in a school
Chapter 12, Problem 12.78(choose chapter or problem)
The roof over a 9.0-m X 10.0-m room in a school has a totalmass of 13,600 kg. The roof is to be supported by vertical2 X 4s (actually about 4.0 cm X 9.0 cm) equally spacedalong the 10.0-m sides. How many supports are required oneach side, and how far apart must they be? Consider onlycompression, and assume a safety factor of 12 .
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