Determine the safe span that a 75 x 125 mm purlin would have if it has a spacing 600 mm on centers, to carry a roof load of 40 Pa and a wind load of 1.2 kPa acting on the vertical surface. Allowable bending stress is 10 MPa and the allowable horizontal shearing stress is 0.4 MPa. The allowable normal deflection is 1/360 of span. Weight of purlin is 5 kN/m3. The pitch of the truss is 1.5/5. and E = 17.3 GPa. a) Span based on bending in meter. b) Span based on shear in meter. c) Span based on deflection in meter. d) Safe span in meter.
Determine the safe span that a 75 x 125 mm purlin would have if it has a spacing 600 mm on centers, to carry a roof load of 40 Pa and a wind load of 1.2 kPa acting on the vertical surface. Allowable bending stress is 10 MPa and the allowable horizontal shearing stress is 0.4 MPa. The allowable normal deflection is 1/360 of span. Weight of purlin is 5 kN/m3. The pitch of the truss is 1.5/5. and E = 17.3 GPa. a) Span based on bending in meter. b) Span based on shear in meter. c) Span based on deflection in meter. d) Safe span in meter.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Determine the safe span that a 75 x 125 mm purlin would have if it has a spacing 600 mm on centers, to carry a roof load of 40 Pa and a wind load of 1.2 kPa acting on the vertical surface. Allowable bending stress is 10 MPa and the allowable horizontal shearing stress is 0.4 MPa. The allowable normal deflection is 1/360 of span. Weight of purlin is 5 kN/m3. The pitch of the truss is 1.5/5. and E = 17.3 GPa.
a) Span based on bending in meter.
b) Span based on shear in meter.
c) Span based on deflection in meter.
d) Safe span in meter.
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