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.

There will be a 16 x 8 garage door for. The wall should be stepped down at the the door 8 10 below the top of the slab. In climate zones 4 and 5 building codes require a minimum of r 10 vertical insulation that extends down 2 ft. I will be building 10 high walls with 2x6 then put on the roof.

For a 5 in thick slab with thickened edges which is perfect for most garages and sheds 2x12 boards work best. For a driveway or other slab without thickened edges use 2x6s. 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. It doesn t include labour supplies such as reinforcing bar or building permit fees.

2x12 cleat over the joint. 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. 200 to 250 mm two way beam. 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.

The slab should have a thickened edge at the wall with a couple of 5 s running the lenght of the opening. The wall should have a key and 5 bars at 12 16 o c. If you can t get long enough boards splice them together by nailing a 4 ft. Start by choosing straight form boards.

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. I am treating the footing and the thickened edge as a single grade beam similar to as shown in this typical detail. Monolithic or thickened edge slabs can only be insulated on the exterior. 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.

After digging down 2 of pure sand i decided to stop compact it and fill the hole with gravel. 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 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.