Beam pockets

[madmantrapper]

I am wondering why the inspector would want the beam pockets in residential construction grouted. The steel beams are set on a CMU wall. I was always taught the leave a 1/2 inch clearance on each side and an inch on the end. This inspector wants them grouted solid, I asked why and he took to the defense and that that is the way it is. I asked for a code reference and he got mad. I am going to the inspection office today to inquire. Just figured I'd throw the question out there.

 

[briancpotter]

Depending on the details of construction, grouting may be necessary to provide a proper bearing surface for the steel beam (though this wouldn't require filling the entire pocket). Grouting can also provide some measure of rollover resistance for the beam. Also, some jurisdictions require beam pockets in certain areas (say, foundation walls) to be grouted solid.

Brian C Potter, PE
Simple Supports - The history and practice of structural engineering.
ConstructionPic - Send annotated jobsite photos.

 

[kylesito]

If this is an exterior wall under grade, it could also be related to the waterproofing.

PE, SE
Eastern United States

"If a builder builds a house for someone, and does not construct it properly, and the house which he built falls in and kills its owner, then that builder shall be put to death!"
~Code of Hammurabi

 

[madmantrapper]

Thanks for the replies. I went to the inspection office today and was told they feel it controls radon better. I say as porous as CMU's are what difference could it possibly make. Anyway I'll grout them.

 

[XR250]

I rarely see these things grouted in residential construction (except in the house that I built)

 

[msquared48]

Radon from what source? Sounds pretty arbitrary to me.

Mike McCann
MMC Engineering

 

[jayrod12]

Ya the radon argument is fishy if you ask me as well. Especially if your beam is located near or above grade, then in essence your main floor doors and windows would be a source of radon intrusion.

 

[madmantrapper]

The beam pockets are 9 feet above grade. Anyway they are grouted now and I'll move on.