In this article, you are going to learn about Slab on grade. As we already discussed about 16 different types of slabs which we usually used in construction. If you want to know? You can refer Here.

16 Different types of Slabs

Well, Slab on grade or Grade slab is one of the 16 types of slabs. Let’s begin,

Slabs which are directly laid on the earth, to support walls and other structural elements are called as Slab on grade or Grade Slabs.

This type of slab is casted directly on ground level. Grade slab itself acts as a foundation for the building which does not require further footings.

• T-shaped foundations are used in areas where the ground freezes.
• First, the footing is placed.
• Second, the walls are constructed and poured.
• Lastly, the slab is placed.

Slab on Grade

Grade slabs are framed in areas where the ground doesn’t freeze. This type of slabs may or may not have reinforcement in it. The decision of inserting reinforcement is based upon the floor loads and local building codes. The thickness of Grade Slab is kept minimum 4 inches. If there are concerns regarding soil characteristics like porosity, the thickness of the slab is further increased. And for safety, a layer of gravel & bitumen are laid on earth before laying concrete slab to prevent the entry of moisture content into the slab.