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, Ty = 77.47 mm 1. Calculate the critical slenderness ratio if there is an additional lateral support in the weak direction at mid-height. a. 36.14 b. 41 90 c. 103.39 d. 51.63 2. If the columns sustains a service axial live load of 990 kN calculate the safe service axial dead load in kN by LRFD. a. 1,578 b. 1,136 c. 1,620 d. 1,827 3. Calculate the allowable axial strength (kN) by ASD. a. 3,777 b. 2,348 c. 2,620 d. 3,529 4. Calculate the design axial strength (kN) of the colurn by LRFD.

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, Ty = 77.47 mm 1. Calculate the critical slenderness ratio if there is an additional lateral support in the weak direction at mid-height. a. 36.14 b. 41 90 c. 103.39 d. 51.63 2. If the columns sustains a service axial live load of 990 kN calculate the safe service axial dead load in kN by LRFD. a. 1,578 b. 1,136 c. 1,620 d. 1,827 3. Calculate the allowable axial strength (kN) by ASD. a. 3,777 b. 2,348 c. 2,620 d. 3,529 4. Calculate the design axial strength (kN) of the colurn by LRFD.

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 5.12.2P

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