A stepped strip foundation is often used on a sloping site where the steps allow the foundation to follow the slope without too much excavation, when compared with excavations and retaining walls. A floor structure that spans between perimeter strip foundations , whether over intermediate piles or not, also minimises excavation, when compared with a slab on grade or slab on fill floor.
Strip foundations are used to support a line of loads, either due to a load-bearing wall, or if a line of columns need supporting where column positions are so close that individual pad foundation would be inappropriate.
A mass strip foundation is a type of shallow foundation that consists of a continuous strip of concrete, designed to support linear loads from walls or structural elements. It distributes the weight of the building over a larger area to prevent sinking or settling. This foundation is typically used for load-bearing walls in low-rise structures and is suitable for soils with good bearing capacity. Its construction is straightforward and cost-effective for many types of buildings.
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Stepped footing is a type of foundation used in construction, characterized by its tiered or stepped design. This method is employed to provide stability on sloped or uneven terrain, effectively distributing the load of the structure while preventing soil erosion. The steps create a larger base area that helps resist lateral forces and enhances structural integrity. Overall, stepped footing is a practical solution for building on challenging landscapes.
Narrow strip or Deep strip footingThis type foundation is used for normal soil and normal loads which just need 0.9m dept cheep in cost construction.The essential feature of the narrow strip foundation is that the trench is too narrow to be dug by labours working in trench. It depends for its success in the ability of a mechanical excavator, such as a light tractor-mounted back-actor with a narrow bucket to dig the trench, which must be self-support until it can be backfill with concrete.It can't be economical be use in very soft clays or water bearing sand which support by close timbering.From Lewis Telfer
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A stepped foundation is a type of foundation made from "cement", it is used when building on a hillside so that the building can be built up level off the foundations
A strip foundation is best known as the lowest part of your structure. The strip foundation is the first piece of supporting layer that is used with a foundation.
Strip foundations are used to support a line of loads, either due to a load-bearing wall, or if a line of columns need supporting where column positions are so close that individual pad foundation would be inappropriate.
20mm
unit weight of sand used in strip foundations is 1700kg per cubic meter
its commonly used in made-up ground.
A reinforced wide strip concrete foundation is used if the soil is soft or is of a low bearing capacity. This would not work for heavy or clumpy soil.
This is a continuous strip of concrete which support load bearing walls which sit on the centre of the foundation.
disvantages of a narrow strip foundation
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THREE DIMENSIONAL DRAWING OF STRIP FOUNDATIONS