W12x79 of A573 Grade 60 (Fy = 415 MPa) steel is used as a compression member. It is 7 m long, pinned at the top fixed at bottom, and has additional support in the weak direction 3 m from the top. Properties of the section are as follows: A = 14,500 mm^2 Ix = 258.6 x 10^6 mm^4 Iy = 84.375 x 10^6 mm^4 1. Calculate the critical slenderness ratio of the member. a. 26.208 b. 45.882 c. 36.706 d. 27.529

W12x79 of A573 Grade 60 (Fy = 415 MPa) steel is used as a compression member. It is 7 m long, pinned at the top fixed at bottom, and has additional support in the weak direction 3 m from the top. Properties of the section are as follows: A = 14,500 mm^2 Ix = 258.6 x 10^6 mm^4 Iy = 84.375 x 10^6 mm^4 1. Calculate the critical slenderness ratio of the member. a. 26.208 b. 45.882 c. 36.706 d. 27.529

Steel Design (Activate Learning with these NEW titles from Engineering!)

6th Edition

ISBN:9781337094740

Author:Segui, William T.

Publisher:Segui, William T.

Chapter5: Beams

Section: Chapter Questions

Problem 5.6.2P

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Question

A W12x79 of A573 Grade 60 (Fy = 415 MPa) steel is used as a compression member. It is 7 m long, pinned at the top fixed at bottom, and has additional support in the weak direction 3 m from the top. Properties of the section are as follows:

A = 14,500 mm^2

I_x = 258.6 x 10^6 mm^4

I_y = 84.375 x 10^6 mm^4

1. Calculate the critical slenderness ratio of the member.

a. 26.208

b. 45.882

c. 36.706

d. 27.529

2. calculate the nominal axial load capacity of the column

a. 3104 kN

b. 4851 kN

c. 4213 kN

d. 5344 kN

3. calculalte the service axial dead load if the service axial live load is twice as that of the dead load. Use LRFD.

a. 1354 kN

b. 992 kN

c. 1093 kN

d. 634 kN

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