1. Three concentrated loads of 50kN, 30KN and 60 kN are loaded on a 14-meter-span fully-restrained beam and each applied at 7 m, 9m and 11 m from the left support respectively. Which of the following most nearly gives the elastic section modulus of the beam (in mm³) if the shape factor is 1.4 and the yield stress is 240 MPa. a.443.667 b. 546.778 c. 488.775 d. 505.952 e. 521.345
1. Three concentrated loads of 50kN, 30KN and 60 kN are loaded on a 14-meter-span fully-restrained beam and each applied at 7 m, 9m and 11 m from the left support respectively. Which of the following most nearly gives the elastic section modulus of the beam (in mm³) if the shape factor is 1.4 and the yield stress is 240 MPa.
a.443.667
b. 546.778
c. 488.775
d. 505.952
e. 521.345
2. A W 14 x 68 having the following properties:
Prop. of W 14 x 68
d = 356.62 mm Sx = 1688 x 10³ mm³ Cb = 1.14
bf = 254.89 mm Zx = 1885 x 10³ mm³ Lp = 2.65 m
tf = 18.29 mm E = 200000 MPa Lr= 8.05 m
Fy = 345 MPa Elastic buckling stress: Fcr = 420 MPa
Which of the ff. most nearly gives the flexural strength of the beam if the beam has an unbraced length of 12 m.
a. 450
b. 709
c. 638
d. 486
e. 585
Which of the ff. most nearly gives the flexural strength of the beam if the beam has an unbraced length of 6 m.
a. 585
b. 709
c. 638
d. 450
e. 486
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