Concrete Floor Garage Door relief

[NotOrganized]

This week our floor is being poured in our 30x50 building. They are planning to pour the garage door relief when they pour the pad. I have been around a few garage pours and they always did it as part of the building/garage floor pour. There have been a lot of different methods to sculpt it out. Of the 4 I have here, two are not flat and the garage door does not seal 100%. Maybe this will work out better.

I am not too worried about it, it just seems different.

 

[mechanic217]

The few I have done were with a steel angle, usually 2" x 2" set in the concrete so one leg faces straight up then the threshold concrete is set about 1/2" lower than the floor, this provides a lip to keep rain etc. out. The steel edge keeps the concrete from chipping.Hope this is clear .

 

[NotOrganized]

I see I did not make the first post clear. They are not doing the door relieve when pouring the floor. They plan to add it back when they pour the driveway pad (outdoor part). On my other building it was done as part of the floor. They plan to pin it so it won't move. As far as chipping, I am not worried about that. They will set it below the floor so water won't come in and there will be plenty of slope away.

 

[ard]

If you are not worried, I am not worried.

 

[Balvar24]

Just make sure that the door rough opening has taken the relief into account.

 

[lakeroadster]

The garage door is mounted inside the building wall. Are you saying they are stopping the slab inside the building, then running the apron up to the building slab?

Where are you located... in a climate that experiences freezing and thawing cycles?

If no freezing and thawing.. you should be ok.

Freezing and thawing, yes? Then the proposed plan is a bad idea IMO. The apron will experience frost heave, meaning that it will want to rise and fall with the seasons. If it does move this will lead to issues with the garage door opener and door locking mechanism. If it doesn't move because of the pinned joints, the stresses may lead to premature cracking.

 

[NotOrganized]

Lakeroadster, given that most drive pads are pinned to the slab here, I think you would experience problems either way. I have not over the years. We have bigger problems with our heavy clay soil. I have excellent drainage away from the building and pads. All I can hope for is it won't be a problem any more than the other 4 overhead doors on my property.

As for the door opening, we are going to be fine with a good 3/4 relief.

Thank you for the input and thank you all for chiming in and helping me feel better.

 

[jdieter]

I added a 1" galvanized pipe in the pour that aligns with the garage door bottom seal. Enough of the pipe diameter is left above the pour to provide a sealing surface for the door rubber seal(maybe 1/4"-3/8") and the concrete slopes away from the pipe on the outdoor side.

 

[shedkept]

Mechanic 217 is right. I know.