I am needing a size of a steel beam. It will clear span 22 feet holding up the above floor that is 2x8's and there will be 12 feet on either side of the beam to the outside walls. The calculations I have made come to a design KIPS of 16.368 Using 22ft X 24ft/2 X 62 #per sqft/1000 = 16.368. I am looking at a W10 or W12 beam. I am unsure of the web thickness and flange width. Any help would be greatly appreciated.
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How did you determine your 62 psf load? Did you use a 40 psf Live Load and 22 psf Dead Load?
62 was the default load in the formula with both live and dead. I have seen anywhere from 50 to 100 psf loading. I felt confident with 62 since the roof load will be on the outside walls.
I got your attachment and modified to my project, but I can't reattach it to this message. Essentially, I have a split level house. I am adding on to the sub-grade living room by 12 feet and the master bed room directly above. The 2x8 floor joists run perpendicular to the trusses, which will be replaced by rafters for a vaulted ceiling and roof beam (which will be perpendicular to the proposed beam) so the weight of the roof will be carried by the roof beam and outside walls, not the floor. The distance to the exterior and interior load bearing wall is 12 feet on either side of the beam, with the beam clear spanning approximately 22 feet perpendicular to the floor joists. Does this paint a clearer picture?If you can give me a way to send you the image, it might help you to better understand the project.
Just a note, you cannot use the Google Chrome browser to attach documents because the tool bar does not show up in the chat window. You need to use the IE browser or the Firefox browser.If that is not the case, have you used Google DOCS before? You can upload your file and then send me the link to it.Let me know. Thanks
Before we get started I’d like to point out that a Professional Engineer’s standard of care typically includes a site visit to assess field conditions and get an overall understanding of the structure. This can obviously not be accomplished through the internet. The information provided here is meant for planning purposes only (general sizing and budgeting) and is based on the information provided by you. All loading cases considered are for vertical loads only, no lateral analysis has been completed. The information should be verified by a professional engineer who can visit the site to ensure that potentially important information has not been overlooked or omitted.I modified you loads to the International Building Code (IBC) required loads and general engineering practice. The Live Load used was 40 psf and the Dead Load used was 15 psf. Based on your description and drawings, No Roof Loads are taken by this steel beam.You can use a W14x22 (50 ksi) steel beam. The beam is 5” wide and 13.75” deep. It weighs 22 pounds per foot of beam length. You will need to provide a wood nailer bolted to the top flange of the steel beam. You will need to provide solid mechanical connections for each of the floor joists to the wood nailer on top of the steel beam. This will provide the needed lateral bracing of the compression flange of the steel beam. You will need to have a local engineer size your column supports, connections and foundations.
Over 27 years of Structural Engineering experience
Thanks, I understand your parameters.
Good Luck with your project!