Beam issue

[Stepho]

Can anyone interpret the attached document for me?

Is this something I need to worry about? Would this issue already have compromised the structure of the home?

https://files.engineering.com/getfi...24-472e-8f3e-a3d27fab2206&file=Steal_Beam.pdf

Thanks!

 

[jayrod12]

What are you wanting? It appears an engineer performed an analysis and determined the steel beam is overstressed. That happen more often than you know.

 

[Stepho]

Sounds like this is normal, but is this extremely over stressed? Do I need to be concerned this will happen again in 5 to 10 years? What's causing the beams to be over stressed? I would have thought the original builders would have tested the beams to ensure this didn't happen.

 

[ShawThing]

The beam and columns appear to have been calculated to be over stressed when checked against the required design loadings. These loads may never be achieved but it is what the structure is required to be designed for. The structural report recommends providing an additional support midspan to resolve this issue. This location may be able to be varied or there may be other options but you would need to check with whomever prepared the report.

 

[msquared48]

Actually, the report recommends two additional columns, but makes no mention of any new footings or connection details. Seems incomplete to me, depending on the contract requirements.

Mike McCann, PE, SE (WA)

 

[ShawThing]

The report summary refers to a single column and references some foundation and connection requirements.

 

[XR250]

Very strange report IMHO. Looks like the analysis assumes that the right end of the W12x22 has a 4700 lb uplift connection i.e the end of the cantilever is pinned down. That appears to be causing the overstress in the beam and columns. I would verify that the right end of the beam is actually tied down to something that can resist that amount of uplift or it has a significant point load on it from above. If not, then the analysis is flawed.

 

[Ron247]

Stepho, is this your house? Did you sell the house and someone wants you to put the columns in?

 

[JoelTXCive]

Are you the seller? If so, I would offer a $1000 sales price concession and move on.

Are you the buyer? If so, I would demand that the seller have the additional column installed; or that the seller provide a $1500 concession.

 

[kipfoot]

I agree with XR250. This design software has a 'design view' and 'report view' that might give more clarity about the results. I suspect that bottom chord bracing might also be a solution to the overstress, regardless of the end support condition to the right of the column. And, why is only the Lr (roof live load) included in the beam design?

I also agree with JoelTXCive. Real estate evaluations are rarely a technical issue, they're usually a money issue. If you're getting a good price, then don't get hung up on a beam analysis.

 

[JAE]

You need to consult with the engineer who produced this report to better clarify what they intended to communicate.
Or - better yet - hire your own engineer to review this.

Check out Eng-Tips Forum's Policies here:
faq731-376

 

[Signious]

This report is weird;

-They don't give load assumptions or applicable codes
-They size the supporting columns with sched pipe without giving a material
-No connection details between the new column and supported beam
-No spec on the concrete or reinf for the supporting foundation element let alone a bearing capacity assumption for the soils

I'd find out who did this report and ask them to clarify what the heck they are talking about

 

[PEinc]

I suspect that a previous owner of this house had removed a column in the basement to give more space without obstruction (pool table, perhaps). $Everyone want to remove a basement column and the original beam never figures for the longer span.

http://www.PeirceEngineering.com

 

[XR250]

Are you the seller? If so, I would offer a $1000 sales price concession and move on.

Are you the buyer? If so, I would demand that the seller have the additional column installed; or that the seller provide a $1500 concession.

I agree. This is unlikely to be a safety issue.