×
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!
  • Students Click Here

*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

Jobs

how serious is the effect of a wall footing situated on top of a footing?

how serious is the effect of a wall footing situated on top of a footing?

how serious is the effect of a wall footing situated on top of a footing?

(OP)
in situations where the wall footing is on top of the spread footing, is it recommended that I neglect the effects of the wall footing in designing a spread footing? what are thoughts anyone? for two stories is it recommended?

RE: how serious is the effect of a wall footing situated on top of a footing?

(OP)
what are your thoughts anyone? is it wise enough to be neglected?

RE: how serious is the effect of a wall footing situated on top of a footing?

I'm not totally sure what you are asking.

You should include the self weight of the footing concrete when calculating your bearing pressure. Depending on the width of your footing you may want to design it for the bending it may see in the transverse direction.

RE: how serious is the effect of a wall footing situated on top of a footing?

Anything that bears on the footing needs to be added to the total weight that the footing bears, if that is what you are asking....

Mike McCann
MMC Engineering

RE: how serious is the effect of a wall footing situated on top of a footing?

If you are touching the design of others, then you are incurring the responsibility for that design. Depends upon the situation.

RE: how serious is the effect of a wall footing situated on top of a footing?

If I understand correctly, you're talking about a continuous perimeter footing that is interrupted by a perimeter column. The column rests on a separate spread footing that is somewhat below the continuous footing.

Is this correct?

If the column's spread footing is not on the same level as AND interlocked via rebar to the continuous footing, then you should NOT include the continuous footing capacity into the support of your column. They act independently and therefore will have differential settlement when loaded.

Even if you footing above is locked in somehow to the column pedestal (or other mechanism) then you still have the issue of lower settlement nullifying upper settlement.

SHORT ANSWER: Do NOT combine their capacities.


Althalus

RE: how serious is the effect of a wall footing situated on top of a footing?

But you do have to combine their loads! If the wall footing bears on the individual spread footing, you need to include the effect of that wall footing on the spread footing by including its reactive load.

For two stories, the loads will be relatively small; however, you need to know and understand the influence so that you can answer questions in the event of an issue later on that might get blamed on you, rightly or wrongly.

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!


Resources