The simply supported wood beam carries a uniformly distributed load of w = 700 lb/ft, where LAB= 8.0 ft and LBC = 16.0 ft. The beam cross-sectional dimensions are b = 6.2 in., d = 20.4 in., yH = 5.6 in., and yK = 8.0 in. Section a–a is located at x = 4.0 ft from A. (a) At section a–a, determine the magnitude of the shear stress in the beam at point H. (b) At section a–a, determine the magnitude of the shear stress in the beam at point K. (c) If the allowable shear stress for the wood is 140 psi, what is the largest distributed load w that can be supported by the beam? Draw a horizontal line through point H. Use the area above this line to calculate the first moment of area associated with point H. Answer: QH = in.3
The simply supported wood beam carries a uniformly distributed load of w = 700 lb/ft, where LAB= 8.0 ft and LBC = 16.0 ft. The beam cross-sectional dimensions are b = 6.2 in., d = 20.4 in., yH = 5.6 in., and yK = 8.0 in. Section a–a is located at x = 4.0 ft from A.
(a) At section a–a, determine the magnitude of the shear stress in the beam at point H.
(b) At section a–a, determine the magnitude of the shear stress in the beam at point K.
(c) If the allowable shear stress for the wood is 140 psi, what is the largest distributed load w that can be supported by the beam?
Draw a horizontal line through point H. Use the area above this line to calculate the first moment of area associated with point H.
Answer:
QH = in.3
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