Concrete Foundation

Types of Concrete Foundations

Concrete foundation types

There are four types of concrete foundations: the Gibraltar, concrete pillars, floating slab, and graduated slab. The type of foundation that’s best for your situation depends on the type of building that you’re installing and its size.

The Gibraltar Concrete Foundation

Gibralter concrete foundation

A: Excavation of site
B: Trench 24” wide X 36” deep (below frost line)
C: 24” x 8″ depth footer (3500 psi concrete pour) reinforced with #4 rebar
D: Cement wall: 8″ x 8″ x 16″ cement block and mortar built up to 6″ above grade
E: 4″ gravel base for drainage, vapor barrier to eliminate moisture and #4 rebar dialed into the cement wall for maximum strength
F: 4″ concrete slab 3500-4000 psi

Concrete Pillars

Concrete pillars

A: Excavation of site
B: Dig holes 32″ to 36″ deep, by 16″ to 24″ diameter
C: Sona tube forms are placed into hole
D: #4 rebar inserted into forms
E: 3500-4000 psi concrete pour
F: Metal strapping

Floating Slab Foundation

Floating concrete slab

A: Excavation of site
B: 4″ gravel base for drainage
C: Vapor barrier to eliminate moisture
D: #4 rebar, for structural integrity
E: 4″ concrete slab 3500-4000 psi

Graduated Slab Foundation

Graduated slab foundation

A: Excavation of site
B: Trench with 12″ to 18″ thickened edge
C: 4″ gravel base for drainage, vapor barrier to eliminate moisture, #4 rebar for structural integrity
D: 4″ concrete slab 3500-4000 psi