The reaction of the ballast on the railway tie can be assumed uniformly distributed over its length as shown. If the wood has an allowable bending stress of σ_allow = 1.5 ksi, determine the required minimum thickness t of the rectangular cross section area of the tie to the nearest 1/8 in.

Transcribed Image Text:

15 kip -1.5 ft- 5 ft- 15 kip 1.5 ft- 12 in.