Structural Steel Design (6th Edition)
Structural Steel Design (6th Edition)
6th Edition
ISBN: 9780134589657
Author: Jack C. McCormac, Stephen F. Csernak
Publisher: PEARSON
Question
Book Icon
Chapter 10, Problem 10.1PFS
To determine

To Select: The lightest section for the continuous beam in the figure using the LFRD method, use elastic method, and factored loads and 0.9 rule.

Expert Solution & Answer
Check Mark

Answer to Problem 10.1PFS

  W21×62

Explanation of Solution

Given:

The continuous beam is shown below.

  Structural Steel Design (6th Edition), Chapter 10, Problem 10.1PFS , additional homework tip  1

And steel is 50ksi .

Calculation:

Compute the factored acting on the beam using the equation.

  wu=1.2D+1.6Lwu=1.2(1)+1.6(2)wu=4.4k/ft

Draw the bending moment diagram with maximum and minimum values.

  Structural Steel Design (6th Edition), Chapter 10, Problem 10.1PFS , additional homework tip  2

Using 0.9 rule, calculate the maximum factored negative moment of the beam.

  Mu()=0.9×(599)Mu()=539ft-k

Calculate the maximum factored positive moment of the beam.

  Mu(+)=309+(110)(599+5442)Mu(+)=366ft-k

Select a W-section from table 3.2 of the AISC Manual such that.

  (ϕbMu)>Mu()

Since,

  (ϕbMu)=540ft-kwhich is greater than 539 ft-k

Therefore, use W21×62

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
determine the horizontal displacement of joint A of the truss.  Each member has a cross sectional area of A=300mm2, E=200GPa.  Use the method of virtual work and show all working
For the frame shown below, determine the vertical displacement at C. Assume that flexural rigidities AB and BC segments are EI and 2EI, respectively. Use the method of virtual work and show all working.
DETERMINE THE BEARINGS OF THE POLYGON/TRAVERSE
Knowledge Booster
Background pattern image
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
Steel Design (Activate Learning with these NEW ti...
Civil Engineering
ISBN:9781337094740
Author:Segui, William T.
Publisher:Cengage Learning