Situation 20. A W12x79 of A573 Grade 60 (Fy = 415 MPa) steel is used as a compression member. It is 8 m long, pinned at the top fixed at bottom. The properties are as follows: Ag = 14,968 sq.mm, rx = 133.65 mm, ry = 77.47 mm. INPUT ALL ANSWERS ROUNDED TO THE NEAREST WHOLE NUMBER A. Calculate the design axial strength (kN) of the column by LRFD. B. Calculate the allowable axial strength (kN) by ASD. C. If the columns sustains a service axial dead load of 1,490 kN calculate the safe service axial live load in kN by LRFD. D. If the columns sustains a service axial dead load of 1,490 kN calculate the safe service axial live load in kN by ASD. E. If the columns sustains a service axial live load of 990 kN calculate the safe service axial dead load in kN by LRFD. F.Calculate the critical slenderness ratio if there is an additional lateral support in the weak direction at mid-height.
Situation 20. A W12x79 of A573 Grade 60 (Fy = 415 MPa) steel is used as a compression member. It is 8 m long, pinned at the top fixed at bottom. The properties are as follows: Ag = 14,968 sq.mm, rx = 133.65 mm, ry = 77.47 mm. INPUT ALL ANSWERS ROUNDED TO THE NEAREST WHOLE NUMBER A. Calculate the design axial strength (kN) of the column by LRFD. B. Calculate the allowable axial strength (kN) by ASD. C. If the columns sustains a service axial dead load of 1,490 kN calculate the safe service axial live load in kN by LRFD. D. If the columns sustains a service axial dead load of 1,490 kN calculate the safe service axial live load in kN by ASD. E. If the columns sustains a service axial live load of 990 kN calculate the safe service axial dead load in kN by LRFD. F.Calculate the critical slenderness ratio if there is an additional lateral support in the weak direction at mid-height.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Situation 20. A W12x79 of A573 Grade 60 (Fy = 415 MPa) steel is used as a compression member. It is 8 m long, pinned at the top fixed at bottom. The properties are as follows: Ag = 14,968 sq.mm, rx = 133.65 mm, ry = 77.47 mm. INPUT ALL ANSWERS ROUNDED TO THE NEAREST WHOLE NUMBER
A. Calculate the design axial strength (kN) of the column by LRFD.
B. Calculate the allowable axial strength (kN) by ASD.
C. If the columns sustains a service axial dead load of 1,490 kN calculate the safe service axial live load in kN by LRFD.
D. If the columns sustains a service axial dead load of 1,490 kN calculate the safe service axial live load in kN by ASD.
E. If the columns sustains a service axial live load of 990 kN calculate the safe service axial dead load in kN by LRFD.
F.Calculate the critical slenderness ratio if there is an additional lateral support in the weak direction at mid-height.
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