How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask StructuralEng Your Own Question
StructuralEng, Consultant
Category: Structural Engineering
Satisfied Customers: 7135
Experience:  Structural Engineer
Type Your Structural Engineering Question Here...
StructuralEng is online now
A new question is answered every 9 seconds

Steel I-beam span = 30 feet (a 30' x 37' room with the I-beam

Customer Question

steel I-beam span = 30 feet (a 30' x 37' room with the I-beam splitting it into two 17.5 feet sections
Total load including ceiling joist/roof beams/drywall/drywall mud/hardware/metal roof/trusses-roof supports, etc.--Everything except snow load in central PA
= 16970 lbs
Given that some of this load gets picked up by the outside walls and the 30 feet span has no posts in the middle, how large of an I-beam do I need
Submitted: 1 year ago.
Category: Structural Engineering
Expert:  StructuralEng replied 1 year ago.
Expert:  StructuralEng replied 1 year ago.
Do you have trusses or rafters and joists?
Customer: replied 1 year ago.
Rafters and joist. Please see original question.
Customer: replied 1 year ago.
Please see attached files
Customer: replied 1 year ago.
If you need anything else, let me know
Expert:  StructuralEng replied 1 year ago.
Thank you. I asked about the trusses vs rafters and joists because it makes a big difference and the original question said trusses.
What is the city in PA so I can look at snow loading?
Customer: replied 1 year ago.
Marysville, PA in Perry County near Harrisburg
Expert:  StructuralEng replied 1 year ago.
You will need a W16x50 beam ASTM A992 Gr. 50 to limit total load deflection to 1". You will ask need to detail the joists to brace the beam laterally.
Expert:  StructuralEng replied 1 year ago.
The beam is 16" deep and weighs 50 pounds per foot
Customer: replied 1 year ago.
Thanks. Just one last question: I believe in over-engineering, what would be the next strongest size of I-beam.
Expert:  StructuralEng replied 1 year ago.
No problem. I'm happy to help. W16x57 or W16x67. Good luck with your project.

Related Structural Engineering Questions