Thickened Slab At Garage Door Opening

It s like a garage door re.

Thickened slab at garage door opening. Mostly for lightly loaded. Tie the slab to the foundation wall at the door. Pouring just a slab with a thickened perimeter is the least expensive and a perfectly acceptable option if you have good soil conditions not spongy. Extend the slab through the door opening to align with outside face of wall and thicken the slab edge locally at the door but not thick enough to bear on the wall footing.

I am leaning toward option 2 in the sketch i e. Some existing garage slabs will not have a thickened footing that runs beneath the slab in the garage door opening. Once we have determined what height the foundation wall needs to be above the lowest top of slab height and take into account the 12 inches of thickened slab the drop in the wall for an overhead garage door is pretty easy to calculate. Floating slab on grade detail at exterior door.

Yes use expansion joints. The figure to the right shows one way that can be done. If your in rain country provide a depression in the slab where your door closes about an inch deep 6 wide and about 3 wider than your door opening to keep water out. Finishingconcrete concretefinishingtechniques mikedayconcrete in this video i m teaching you about finishing concrete at the garage door openings.

There is a world of difference between the three types and which one will be. Option 2 completely blocks out the stemwall at the garage door and then a thicken edge is poured where the slab meets the footing at the garage door this seems to be the preferred method in western washington. For other options speak to your jurisdiction. The wall should have a key and 5 bars at 12 16 o c.

I d also provide a 3 man door for entry. The wall should be stepped down at the the door 8 10 below the top of the slab. Adding one course of block to a slab keeps the garage door framing farther up from the ground which may be necessary depending on the grade. Type 1 is sometimes referred to as a thickened slab garage foundation and type 2 is often referred to as a stem wall garage foundation and type 3 is often referred to as a hybrid stem wall garage foundation for the reason that it is a combination of both type 1 and type 2 and is often used in areas that have highly plastic soils conditions such as is found in south dakota and other parts of the u s a.

In these cases it is often required to dig under the slab and add a footing to support the new wall above.