Select the lightest double angle compression member to carry 110 kips dead load and 130 kips live load. The effective length KL = 20 ft. Assume the backs of the angles are separated by a f-in. gusset plate. Indicate the orientation of the angle legs (i.e., short or long legs back-to- back). If angles are selected for all three steels, indicate the economical choice if relative costs are A36 (1.0), Fv = 50 (1.07), and Fv = 60 (1.10). Use (a) A36 steel; (b) Fv = 50 ksi; (c) Fy = 60 ksi. %3|

Select the lightest double angle compression member to carry 110 kips dead load and 130 kips live load. The effective length KL = 20 ft. Assume the backs of the angles are separated by a f-in. gusset plate. Indicate the orientation of the angle legs (i.e., short or long legs back-to- back). If angles are selected for all three steels, indicate the economical choice if relative costs are A36 (1.0), Fv = 50 (1.07), and Fv = 60 (1.10). Use (a) A36 steel; (b) Fv = 50 ksi; (c) Fy = 60 ksi. %3|

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Bars

In civil engineering, bars refer to steel reinforcement bars or rebars. These are structural members primarily used for reinforcement purposes in masonry works. A bar is characterized by its cross-sectional area, which is negligible compared to its length. Bars are usually manufactured by steel which is uniform throughout the length, or by meshing multiple steel wires. Other materials of the bar include carbon steel, glass fiber, carbon fiber, and basalt fiber. The reinforcing bars are coated with epoxy resins and other materials to enhance some of their properties including corrosion resistance.

Question

Select the lightest double angle compression
member to carry 110 kips dead load and 130
kips live load. The effective length KL = 20 ft.
Assume the backs of the angles are separated
by a f-in. gusset plate. Indicate the orientation of
the angle legs (i.e., short or long legs back-to-
back). If angles are selected for all three steels,
indicate the economical choice if relative costs
are A36 (1.0), Fv = 50 (1.07), and Fv = 60 (1.10).
Use (a) A36 steel; (b) Fv = 50 ksi; (c) Fy = 60 ksi.

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