Frost-Protected Shallow Foundations Reduce Costs, Save Energy

Fig. 3: FPSF simplified design parameters for heated buildings.

Vertical and horizontal insulation are used for an FPSF project in Fargo, N.D.

Crew places and screeds a 1-1/2-inch base of flowable fill.

L-shaped edge forms of EPS foam are placed around the perimeter of the slab.

Completed perimeter formwork.

Continuous vapor and air barrier In place over the foam insulation.

Crushed stone in place to form haunches in slab, before setting rebar.

Steel reinforcing placed at corner.

Finished concrete.

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