The roof over a 9.0-m x 10.0-m room in a school has a total mass of 12900 kg. The roof is to be supported by vertical wooden "2 x 4s" (actually about 4.0 cm x 9.0 cm) equally spaced along the 10.0-m sides. Consider only compression, and assume a safety factor of 14. The compressive strength for the wood is 3.5 x 107 N/m2. Part A How many supports are required on each side? Express your answer as an integer. ? N = supports on each side Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Part B How far apart must they be? Express your answer to two significant figures and include the appropriate units. HÁ d = Value m Submit Previous Answers Request Answer

The roof over a 9.0-m x 10.0-m room in a school has a total mass of 12900 kg. The roof is to be supported by vertical wooden "2 x 4s" (actually about 4.0 cm x 9.0 cm) equally spaced along the 10.0-m sides. Consider only compression, and assume a safety factor of 14. The compressive strength for the wood is 3.5 x 107 N/m2. Part A How many supports are required on each side? Express your answer as an integer. ? N = supports on each side Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Part B How far apart must they be? Express your answer to two significant figures and include the appropriate units. HÁ d = Value m Submit Previous Answers Request Answer

Mechanics of Materials (MindTap Course List)

9th Edition

ISBN:9781337093347

Author:Barry J. Goodno, James M. Gere

Publisher:Barry J. Goodno, James M. Gere

Chapter5: Stresses In Beams (basic Topics)

Section: Chapter Questions

Problem 5.12.11P: A cylindrical brick chimney of height H weighs w = 825 lb/ft of height (see figure). The inner and...

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