Contact US

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

Dilemma of repairing old buildings

Dilemma of repairing old buildings

Dilemma of repairing old buildings


As civil and structural engineers, when you get to repair a residential building damaged by flood, vehicle impact or any other type of incident, how do you deal with the non-conformity with the current building code? Sometimes the damage is minimal (e.g. a couple of wall studs) but the foundtion or the roof above it doesn't conform to the code. How are you going to put these non-conforming members in your repair drawings? Especially in those houses where if you start upgrading to the code, you won't finish before replacing a large portion of the building! How do codes in North America (U.S.A and Canada) deal with that?

RE: Dilemma of repairing old buildings

For commercial buildings, it's in the IEBC. There are rules for repairing structures and certain thresholds where retrofitting is required. Most jurisdictions I've dealt with follow this. I believe there are some west cost jurisdictions that are a little more strict on seismic retrofitting.

For residential, it depends a little more on where you are. Some places refer to the IEBC rules, others have their own limits. I'm used to seeing significant improvement thresholds for houses around 50% of assessed value of the improvement. So if the repair cost is worth more than half the house, the rest of the house has to be brought up to code. AHJ can give exceptions, too, of course. I did a lot of FEMA work where, in some cases, the work was more than the house was worth, but we didn't touch anything above the new foundation except the straps and anchors that held it down.

If you're repairing damage, the general rule is to put back what was there. What is installed has to be done to current code - member sizes, strength, connections, etc. But as long as you don't change the load path, you don't need to replace any non-damaged members.

RE: Dilemma of repairing old buildings

@phamENG....exactly. My experience as well.

RE: Dilemma of repairing old buildings

Thank you for your replies. This helps

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


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