A simply supported composite beam with a 3.6 m span supports a triangularly distributed load of peak intensity go at midspan (see figure part a). The beam is constructed of two wood joists, each 50 mm x 280 mm, fastened to two steel plates, one of dimensions 6 mm x 80 mm, and the lower plate of dimensions 6 mm x 120 mm, (see figure part b). The modulus of elasticity for the wood is 11 GPa and for the steel is 210 GPa 30 mm X 280 mm wood joist 280 mm 6 mm X 120 mm steel plate 18 m (a) (b) If the allowable stresses are 7 MPa for the wood and 120 MPa for the steel, find the allowable peak load intensity go.a when the beam is bent about the z axis. Neglect the weight of the beam. Round to two decimal places.
A simply supported composite beam with a 3.6 m span supports a triangularly distributed load of peak intensity go at midspan (see figure part a). The beam is constructed of two wood joists, each 50 mm x 280 mm, fastened to two steel plates, one of dimensions 6 mm x 80 mm, and the lower plate of dimensions 6 mm x 120 mm, (see figure part b). The modulus of elasticity for the wood is 11 GPa and for the steel is 210 GPa 30 mm X 280 mm wood joist 280 mm 6 mm X 120 mm steel plate 18 m (a) (b) If the allowable stresses are 7 MPa for the wood and 120 MPa for the steel, find the allowable peak load intensity go.a when the beam is bent about the z axis. Neglect the weight of the beam. Round to two decimal places.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A simply supported composite beam with a 3.6 m span supports a triangularly distributed load of peak intensity go at midspan (see figure part a). The beam is constructed of two wood joists, each 50 mm x 280 mm, fastened to two steel plates, one of dimensions 6 mm x 80 mm, and the lower plate of dimensions
6 mm x 120 mm, (see figure part b). The modulus of elasticity for the wood is 11 GPa and for the steel is 210 GPa.
6 mm x S0 mm
steel plate
50 mm X 280 mm
280 mm
wood joist
6 mm X 120 mm
steel plate
1.8 m
1.8 m
(a)
(b)
If the allowable stresses are 7 MPa for the wood and 120 MPa for the steel, find the allowable peak load intensity gn mer when the beam is bent about the z axis. Neglect the weight of the beam. Round to two decimal places.
kN
40,max
m
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