Tempo:
format to form strip footings. The fabric is laid on the ground and, when filled with concrete, conforms to the uneven ground surfaces. The fabric is left in place preventing rapid drying of the concrete and eliminating the need to strip away the formwork. When integrated into foundation forms such as ICF formwork shown in Figure 34, concrete footings and foundation walls can be cast in one continuous concrete pour.
Stepped Footings Stepped footings may be required on sloping sites or where there is an unstable soil pocket under a footing. They may also be required
in split-level houses and walk-out basements. Unless placed on rock, the bottom of each run level of the footing should be placed on undisturbed soil or compacted granular fill. The vertical part of the step should be placed at the same time as the footing. The vertical connection between footings at the step should be concrete at least 150 mm (6 in.) thick and the same width as the footings (Figure 35). On steep slopes, more than one step may be required. Except in rock, the vertical distance between steps should not exceed 600 mm (24 in.), and the horizontal distance between steps should not be less than 600 mm (24 in.).
34 Fabric form footing and ICF foundation wall Sub-slab insulation extruded polystyrene foam board • provides R 20 (RSI 3.5) insulation minimizing heat loss through floor slab • made using non ozone depleting expanding agent Footing utilized fabric forming system • easy leveling • prevents concrete water from entering water table • produces a stronger footing • single concrete pour for walls and footing • eliminates ground water entry
35 Stepped footings
grade entrance finished grade 600 mm (24 in.) minimum step length footing on undisturbed soil
below frost line 600 mm (24 in.) max.
Stepped Footings Stepped footings may be required on sloping sites or where there is an unstable soil pocket under a footing. They may also be required
in split-level houses and walk-out basements. Unless placed on rock, the bottom of each run level of the footing should be placed on undisturbed soil or compacted granular fill. The vertical part of the step should be placed at the same time as the footing. The vertical connection between footings at the step should be concrete at least 150 mm (6 in.) thick and the same width as the footings (Figure 35). On steep slopes, more than one step may be required. Except in rock, the vertical distance between steps should not exceed 600 mm (24 in.), and the horizontal distance between steps should not be less than 600 mm (24 in.).
34 Fabric form footing and ICF foundation wall Sub-slab insulation extruded polystyrene foam board • provides R 20 (RSI 3.5) insulation minimizing heat loss through floor slab • made using non ozone depleting expanding agent Footing utilized fabric forming system • easy leveling • prevents concrete water from entering water table • produces a stronger footing • single concrete pour for walls and footing • eliminates ground water entry
35 Stepped footings
grade entrance finished grade 600 mm (24 in.) minimum step length footing on undisturbed soil
below frost line 600 mm (24 in.) max.
©
2026
Lehal.net