Thickened Slab At Garage Door Opening

The second sheet is for a similar situation however in this case i am considering option 2 where the stem wall has been blocked out and a thickened edge slab spans the gap created by the garage door.

Thickened slab at garage door opening.

The cost of concrete for a slab garage floor includes the delivery of concrete and any material overages as a result of waste. As per the present market rates the average cost of concrete for a 400 square foot slab the typical size for a two car garage. 200 to 250 mm two way beam. If you can t get long enough boards splice them together by nailing a 4 ft.

There will be a 16 x 8 garage door for. That can be bent into the slab. For a driveway or other slab without thickened edges use 2x6s. For a 5 in thick slab with thickened edges which is perfect for most garages and sheds 2x12 boards work best.

I will be building 10 high walls with 2x6 then put on the roof. 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. You want the slab to move with the building not the driveway. The wall should be stepped down at the the door 8 10 below the top of the slab.

150 to 250 mm 1 for longer spans drop panels thickened portions of the slab are added at the columns this system is referred to as a flat slab and has an economical span range of 25 to 30 ft 7 5 to 9 m with minimum slab thicknesses of 8 5 to 10 in. I plan on reinforcing the slab with 15m bars on 12 centers both ways and put two around the slab perimeter and one inside the perimeter wall. 2x12 cleat over the joint. Mum slab thicknesses of 6 to 10 in.

If your slab is heated it s a good idea to increase the r value of the vertical and the horizontal insulation to at least r 20. The slab should have a thickened edge at the wall with a couple of 5 s running the lenght of the opening. Monolithic or thickened edge slabs can only be insulated on the exterior. The wall should have a key and 5 bars at 12 16 o c.

I am treating the footing and the thickened edge as a single grade beam similar to as shown in this typical detail. 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. In climate zones 4 and 5 building codes require a minimum of r 10 vertical insulation that extends down 2 ft. 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.