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 walkereng Your Own Question

walkereng
walkereng, Consultant
Category: Structural Engineering
Satisfied Customers: 1666
Experience:  Over 28 years of Structural Engineering experience.
Type Your Structural Engineering Question Here...
walkereng is online now
A new question is answered every 9 seconds

I wish to replace three 2x10 wooden floor beams with an I Beam

Customer Question

I wish to replace three 2x10 wooden floor beams with an I Beam to create a bit of free space close to the beams.

What size of I Beam, (S and/or W) would be the equivalent of the three 2x10 wooden beams (Southern Pine) for domestic floor beam support with span of 9' 6" supporting main floor of domestic residence above.

If I reverse engineer the choice of the existing three 2x10 wooden beams it would appear these had been chosen from wood frame construction tables (Canadian) for floor joist support length 'L' of 12 ' (1/2 of 24') built with 2x12s on 16" centres, as are in place now.
Using those tables the best case span for the Floor Beam Span for the three 2x10 Southern Pine wooden beams is 10' 6" for good quality to about 9'6" for lesser quality lumber. Actual span is 9' 6" between upright supports confirming the choice that had probably been made for the existing wooden beams.
Submitted: 2 years ago.
Category: Structural Engineering
Expert:  walkereng replied 2 years ago.

walkereng :

I can help

walkereng :

I have attached a file, can you take a look at it and answer the questions at the bottom of the sheet? Your answers will allow me to accurately model the loading and size your beam. Thanks


 

walkereng :

I am going to switch over to the Q&A format and we can continue with the e-mail process. When you come back online, just reply to this last e-mail (use the e-mail account that you gave to JustAnswers) to tell me you are back. You do not need to hit the "Accept" button until we are complete and you are satisfied. Thanks.


 

Expert:  walkereng replied 2 years ago.
What Happens Now?

Your chat has ended, but you can still work with your Expert to get an answer to your question if you have not yet received one.

Come back to this page at any time to see additional information from your Expert.  You will also receive an email when your question is updated.  If you want to send a message to your Expert, use the box below.

If you have already received a satisfactory answer to your question, click the Accept button above.  Experts are credited for each accepted answer they provide.
Customer: replied 2 years ago.
Hi Walker, I replied to your email by simply replying to your email, not sure if that gets routed to you properly/ automatically?
Paul (question ID# XXXXX)

Here is the answers again in case that email didnt redirect correctly:

looked at your pdf.
I'm not able to edit the pdf, but to answer what you need from that diagram:
QNs1, 6, 7 and 8
This is a bungalow residence (1 story with a basement)
THe new beam is in the basement, so it would be a new beam 2 if there is no second story
QN2
Floor joist span #3 and #4 above the new beam are both currently 12 feet.
Span #3 will be reduced by a new supporting wall in the basement parallel to the new beam, so span #3 will be reduced to be only 6 feet before this new beam replacement goes into place, so that would reduce the size of the new beam slightly.
Just FYI the new supporting wall is being added for functional /room division reasons in the basement as well as to remove the weight of a bath tub from the floor area supported by joist span #3 above new beam 1, so that new beam 1 will not see a bath tub load on the floor spans above it (and an upgraded bath tub is being added in future that will not affect what we do today as it will be isolated by that new supporting wall).
QN 3. Roof trusses transfer load to interior walls.
Trusses are factory built with metal plates.
QN4
Residence is in the city of Ottawa in the province/state of Ontario, Canada.
QN5
Roofing is metal (so snow tends to slide off more than on other roof types - which is I assume the point here).
Note Floor joists for span #3 and #4 are 2x12" on 16" oc
Hopefully that covers what we need?
Paul

Expert:  walkereng replied 2 years ago.
I apologize for the delay, I got sidetracked yesterday. I will be working on your question this morning. I will get back to you shortly.
Expert:  walkereng replied 2 years ago.
For your 9.5' span you can use:

W8x13 (50 ksi) steel beam. This beam is 4" wide, 8" deep and weighs 13 pounds per foot of beam.

You need to make sure you provide solid mechanical connections between each of your existing 2"x12" floor joists and the top flange of the steel beam. If the floor joists will rest on top of the steel beam, you can bolt a timber nailer to the top of the top flange to connect your 2x12 floor joists to.

You will need to have a local engineer size your supports, detail your connections, and check the load path to your foundation.

Let me know if you have any other questions.
walkereng, Consultant
Satisfied Customers: 1666
Experience: Over 28 years of Structural Engineering experience.
walkereng and other Structural Engineering Specialists are ready to help you
Customer: replied 2 years ago.
Thankyou.


Expert:  walkereng replied 2 years ago.
Good Luck with your project!

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
< Last | Next >
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
  • Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland
  • He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here. Diane Dallas, TX
 
 
 

Meet The Experts:

 
 
 
  • walkereng

    Consultant

    Satisfied Customers:

    1487
    Over 28 years of Structural Engineering experience.
< Last | Next >
  • http://ww2.justanswer.com/uploads/WA/walkereng/2012-2-2_4226_Brad2.64x64.jpg walkereng's Avatar

    walkereng

    Consultant

    Satisfied Customers:

    1487
    Over 28 years of Structural Engineering experience.
  • http://ww2.justanswer.com/uploads/VG/vgdlpc/2012-1-17_235838_VICENTEPHOTO.64x64.jpg vgdlpc's Avatar

    vgdlpc

    Master's Degree

    Satisfied Customers:

    17
    Civil Engineer, Major in Structures and Foundations. Professional Engineer 11 years of experience.
  • http://ww2.justanswer.com/uploads/ST/StructuralEng/2013-9-10_61545_struct.64x64.jpg StructuralEng's Avatar

    StructuralEng

    Consultant

    Satisfied Customers:

    3541
    Structural Engineer
  • http://ww2.justanswer.com/uploads/35/350matt/2012-6-7_182356_matsavatr.64x64.jpg Matt's Avatar

    Matt

    Engineer

    Satisfied Customers:

    18
    Mechanical Engineering Hons degree, been working in automotive industry for the last 18 years - Engine development engineer
  • /img/opt/shirt.png ibosley's Avatar

    ibosley

    Master's Degree

    Satisfied Customers:

    88
    Mechanical Engineering
  • http://ww2.justanswer.com/uploads/FL/FLAandNYLawyer/2012-1-27_14349_3Fotolia25855429M.64x64.jpg FiveStarLaw's Avatar

    FiveStarLaw

    Consultant

    Satisfied Customers:

    109
    attorney and legal researcher
 
 
 

Related Structural Engineering Questions