ARCH 2615-5615 Building Technology II: Structural Elements
Spring 2022
Jonathan Ochshorn
Assignment #4: Steel structural design
Issued March 10, 2022
Due: March 15, 2022, 2:40 AM* (upload PDF to canvas)
Solutions
For the framing plans and sections that you created for Assignment 3, assume the following:
Office occupancy with L = 50 psf. Consider live load reduction to determine the reduced live load.
Dead load (for floors and roof) = 55 psf.
Snow load = 35 psf.
Construction/maintenance roof live load, Lr = 30 psf.
Use A-992 steel wide-flange sections for all beams, girders, and columns.
Design beams and girders with an allowable live load deflection of L/360 and an allowable total load deflection of L/240.
Choose any interior beam, girder, and column from your Assignment 3 proposal.
Requirements
A. Using the online calculators for column governing loads, steel beams, and steel columns, design the following elements:
Typical beam.
Typical girder.
First-floor interior column (assume 15-foot height).
Include framing plans from your assignment 3 project showing the spans and spacing of the selected beam and girder, as well as the tributary area dimensions for your selected interior first-floor column (you may assume that the tributary area for your interior column is the same on all floor/roof levels).
Include screen shots of the relevant calculators (with the correct answer circled) in your pdf.
B. Design the typical steel wide-flange beam without using the calculators. You may not get the same answer as you did using the calculator, since we'll stop if the deflection calculations show that the beam is no good. In any case, show all your calculations, step by step! You can refer to your class notes (pdf) or to Example 4.6 in the text. If deflection is no good, simply write "no good for live load or total load deflection", as the case may be, and stop! Do not re-design.
* Note that the grace period for late assignments ends at 9:40 AM on Thursday, March 17, 2022. Assignments will not be accepted after that point.
© 2021 Jonathan Ochshorn. First posted 18 March 2021. Last updated: 4 March 2022
ARCH 2615-5615 Building Technology II: Structural Elements
Spring 2022
Jonathan Ochshorn
Assignment #4: Steel structural design
Issued March 10, 2022
Due: March 15, 2022, 2:40 AM* (upload PDF to canvas)
Solutions
For the framing plans and sections that you created for Assignment 3, assume the following:
Office occupancy with L = 50 psf. Consider live load reduction to determine the reduced live load.
Dead load (for floors and roof) = 55 psf.
Snow load = 35 psf.
Construction/maintenance roof live load, Lr = 30 psf.
Use A-992 steel wide-flange sections for all beams, girders, and columns.
Design beams and girders with an allowable live load deflection of L/360 and an allowable total load deflection of L/240.
Choose any interior beam, girder, and column from your Assignment 3 proposal.
Requirements
A. Using the online calculators for column governing loads, steel beams, and steel columns, design the following elements:
Typical beam.
Typical girder.
First-floor interior column (assume 15-foot height).
Include framing plans from your assignment 3 project showing the spans and spacing of the selected beam and girder, as well as the tributary area dimensions for your selected interior first-floor column (you may assume that the tributary area for your interior column is the same on all floor/roof levels).
Include screen shots of the relevant calculators (with the correct answer circled) in your pdf.
B. Design the typical steel wide-flange beam without using the calculators. You may not get the same answer as you did using the calculator, since we'll stop if the deflection calculations show that the beam is no good. In any case, show all your calculations, step by step! You can refer to your class notes (pdf) or to Example 4.6 in the text. If deflection is no good, simply write "no good for live load or total load deflection", as the case may be, and stop! Do not re-design.
* Note that the grace period for late assignments ends at 9:40 AM on Thursday, March 17, 2022. Assignments will not be accepted after that point.
© 2021 Jonathan Ochshorn. First posted 18 March 2021. Last updated: 4 March 2022