A rectangular wooden beam has a span of 6 m. and carries a total uniform load of 25 kN/m including its own weight. The beam is made up of 80% stress grade Apitong with allowable stresses shown on table TM-6. Allowable Stress for Apitong 80% Stress Grade: Allowable bending - 16.5 MPa Compression parallel to grain = 9.56 MPa Compression perpendicular to grain =2.20MPa Shear parallel to grain = 1.73 MPa Modulus of elasticity = 7310 MPa Allowable deflection = L/240 1) Which of the following gives the smallest dimension of beam that will not exceed the allowable bending stress? a) 220 x 440 mm b) 320 x 540 mm c) 120 x 340 mm d) 320 x 440 mm 2) Which of the following gives the smallest dimension of the beam that will not exceed the allowable shearing stress? c) 250 x 500 d) 300 x 600 a) 100 x 200 mm mm b) 200 x 400 mm mm 3) Which of the following gives the smallest dimension of the beam that will not exceed the allowable deflection? a) 100 x 200 mm b) 200 x 400 mm c) 250 x 500 mm d) 300 x 600 mm
A rectangular wooden beam has a span of 6 m. and carries a total uniform load of 25 kN/m including its own weight. The beam is made up of 80% stress grade Apitong with allowable stresses shown on table TM-6. Allowable Stress for Apitong 80% Stress Grade: Allowable bending - 16.5 MPa Compression parallel to grain = 9.56 MPa Compression perpendicular to grain =2.20MPa Shear parallel to grain = 1.73 MPa Modulus of elasticity = 7310 MPa Allowable deflection = L/240 1) Which of the following gives the smallest dimension of beam that will not exceed the allowable bending stress? a) 220 x 440 mm b) 320 x 540 mm c) 120 x 340 mm d) 320 x 440 mm 2) Which of the following gives the smallest dimension of the beam that will not exceed the allowable shearing stress? c) 250 x 500 d) 300 x 600 a) 100 x 200 mm mm b) 200 x 400 mm mm 3) Which of the following gives the smallest dimension of the beam that will not exceed the allowable deflection? a) 100 x 200 mm b) 200 x 400 mm c) 250 x 500 mm d) 300 x 600 mm
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Answer the ff. With solutions.
Transcribed Image Text:A rectangular wooden beam has a span of 6 m. and carries
a total uniform load of 25 kN/m including its own weight. The
beam is made up of 80% stress grade Apitong with
allowable stresses shown on table TM-6.
Allowable Stress for Apitong 80% Stress Grade:
Allowable bending - 16.5 MPa
Compression parallel to grain = 9.56 MPa
Compression perpendicular to grain
=2.20MPa
Shear parallel to grain = 1.73 MPa
Modulus of elasticity = 7310 MPa
Allowable deflection = L/240
1) Which of the following gives the smallest dimension
of beam that will not exceed the allowable bending
stress?
a) 220 x 440 mm
b) 320 x 540 mm
c) 120 x 340 mm
d) 320 x 440 mm
2) Which of the following gives the smallest dimension
of the beam that will not exceed the allowable shearing
stress?
a)
c) 250 x 500
b)
d) 300 x 600
100 x 200 mm
mm
200 x 400 mm
mm
3) Which of the following gives the smallest dimension
of the beam that will not exceed the allowable
deflection?
a) 100 x 200 mm
b) 200 x 400 mm
c) 250 x 500 mm
d) 300 x 600 mm
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