Building A Garage On An Existing Concrete Slab

If you re fortunate enough to have a pre existing concrete slab in your yard then you are already halfway to building extremely solid storage shed.

Building a garage on an existing concrete slab.

Figure 1 garage constructed on concrete pad. I would use a concrete saw to cut out two foot by two foot squares at each column location remove the concrete auger holes as appropriately designed by the building engineer set the columns in the hole per the plans then form and fill with premix around the top of the column to complete the slab. A 12 by 24 by 6 slab equals 7 41 cubic yards and will cost about 740 for concrete poured directly by a chute from a mixer truck. 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.

Measure and mark on the existing concrete the points of your corners for your shed. Figure 2 l concrete foundation anchor bolt. Any structure that you build will be more stable when it is set on a solid foundation. Cinder blocks are a great tool for building garden walls or storage structures in your yard.

The type of fastener used to hold the building or structure to the pad is determined by whether the pad is in place or is to be poured. The type of foundation or footings and slab you build your garage on will depend on your budget the size of the garage the grade and the soil conditions. From this red line measure in the width of the sill plate 4 inches if you are using 2 by 4s 6 inches for a 2 by 6. Concrete pad to be poured figure 3.

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