At joint A

At joint B

At joint E

At joint F

At joint C

check

At joint D

check

check

Summary

Determine the force in members AB, BD, BE, and DE of the Howe roof truss shown in Fig. P-409.

Solution 409

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At Joint A

compression answer

At Joint CBy inspection tension

At Joint BBy inspection compression answer

compression answer

At Joint DBy inspection compression

tension answer

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At Joint A

compression

tension

At Joint B

tension

compression

At Joint C

tension

tension

At Joint D

compression

Check!

At Joint E

Check!

Check!

Summary

AB = 4041.45 lb compressionAC = 2020.72 lb tensionBC = 2886.75 lb tensionBD = 3464.10 lb compressionCD = 1732.05 lb tensionCE = 2598.07 lb tensionDE = 5196.15 lb compression