(13) A beam is to be rectangular in section with depth twice the width. The distance between supports is 6 feet and there are two concentrated downward loads : 6,000 lb 18 in. from the left support, and 5,000 lb., 40 in. from the left support. (a) Draw shear and bending-moment diagrams. (b) Using steel with E equal to 30,000,000 psi and ultimate strength of 75,000 psi, determine the beam dimensions if the maximum stress is to be 15,000 psi. (c) Using cast iron with E equal to 10,000,000 psi and ultimate strength of 30,000 psi, determine the beam dimensions if the maximum stress is 5,000 psi.

Elements Of Electromagnetics
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ISBN:9780190698614
Author:Sadiku, Matthew N. O.
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(13) A beam is to be rectangular in section with depth twice the width. The distance between supports is
6 feet and there are two concentrated downward loads : 6,000 lb 18 in. from the left support, and
5,000 lb., 40 in. from the left support.
(a) Draw shear and bending-moment diagrams.
(b) Using steel with E equal to 30,000,000 psi and ultimate strength of 75,000 psi, determine the
beam dimensions if the maximum stress is to be 15,000 psi.
(c) Using cast iron with E equal to 10,000,000 psi and ultimate strength of 30,000 psi, determine the
beam dimensions if the maximum stress is 5,000 psi.
Transcribed Image Text:(13) A beam is to be rectangular in section with depth twice the width. The distance between supports is 6 feet and there are two concentrated downward loads : 6,000 lb 18 in. from the left support, and 5,000 lb., 40 in. from the left support. (a) Draw shear and bending-moment diagrams. (b) Using steel with E equal to 30,000,000 psi and ultimate strength of 75,000 psi, determine the beam dimensions if the maximum stress is to be 15,000 psi. (c) Using cast iron with E equal to 10,000,000 psi and ultimate strength of 30,000 psi, determine the beam dimensions if the maximum stress is 5,000 psi.
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