×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Load distribution for beams reinf. conc. wall

Load distribution for beams reinf. conc. wall

Load distribution for beams reinf. conc. wall

(OP)
Can you use a triangluar load distribution for a beam supporting an opening in a reinforced poured concrete wall (M=wl/6)?

RE: Load distribution for beams reinf. conc. wall

More info is needed if you want intelligent responses:

1. Do you have a lintel cast monolithically with the concrete wall or some other type of beam that's not cast with the wall?

2. What are the proportions of the opening including the amount of monolithic concrete above and to each side of the opening?

3. Do you have concentrated loads within this triangular region?

4. Do you have any joints in the wall near this opening, especially at the corners?

DBD

RE: Load distribution for beams reinf. conc. wall

If it is a small opening, monolithically poured, and a deep lintel to justify "arching" effect, it should be acceptable to assume a triangular distribution.

For specifics, I agree with DBDavis.

RE: Load distribution for beams reinf. conc. wall

(OP)
12' opening for a 6" poured concrete wall reinforced with 6x6 fibermesh. It is a new cut in an existing wall. Only a 1 story concrete building with a concrete joist deck supported by concrete columns exterior and interior. Loads for the roof system are transferred to the vertical columns. The wall has no point loads and is not loadbearing. The load carried is basically 5' of wall above. Thanks for your reply on this. For the load distribution, I'm curious as to whether triangular distribution is viable in this type of setup. I deal mainly with masonry block and am new to renovation of buildings of this type.

RE: Load distribution for beams reinf. conc. wall

The Code does not allow plain concrete except for elements that bear directly on soil.  I would use a steel lintel of some sort--perhaps a channel each side of the wall.

DaveAtkins

RE: Load distribution for beams reinf. conc. wall

1 Harumph for DaveAtkins reply about the channel. You can consider putting the channel one side only if that gets it by your architect.

DBD

RE: Load distribution for beams reinf. conc. wall

You could apply the same rules for arching action as for a masonry wall.  Those rules however, require the height of wall above the opening to be greater than half the lintel length.  If you have 5 ft of concrete above a 12 ft long lintel, you don't meet that criteria.

RE: Load distribution for beams reinf. conc. wall

...and adding to jmiec - you also need sufficient wall on either side of the opening to take the lateral thrust of your arching action.

RE: Load distribution for beams reinf. conc. wall

You can consider a couple of point loads at each side of the opening.  If you consider dwls from the beam to the wall, the ones on each side of the opng are likely in tension... just to maintain continuity.

Dik

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources

The Low-Code Digital Transformation Guide
Change the way you develop apps and, in turn, change the way your business operates and engages with customers, leading to new channels of revenue. This ebook is the culmination of 14 years of experience with 4,000 customers that have all transformed their business through low-code development. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close