Table of Contents
What is strip footing foundation?
Strip foundations (or strip footings) are a type of shallow foundation that are used to provide a continuous, level (or sometimes stepped) strip of support to a linear structure such as a wall or closely-spaced rows of columns built centrally above.
What is strip construction?
Strip construction is a building method that uses long, narrow pieces (strips) of material joined on their edges to produce a continuous surface, forming the skin of a structure. It is usually supported by frames, bulkheads, fabrics or veneers running perpendicular to the strips.
What is the difference between strip and pad foundation?
Pad foundation refers to the foundation which is intended for sustaining concentrated loads from a single point load such as structural columns. Strip foundation is used to support a line of loads such as load-bearing walls.
What is an advantage of a strip foundation?
Sometimes referred to as a strip footing, a strip foundation is a type of shallow foundation often used within low to medium rise residential buildings. Suitable only where the ground conditions are stable and with good load-bearing capacity, strip foundations are fast and cost-effective to build.
What are the three types of strip foundation?
There are four types of foundation: Deep Strip, Raft, Trenchfill and Piled. Wherever possible, establish ground conditions by means of a survey in order to pre-determine the foundation method best for your site. Deep Strip foundations are the least expensive and are used when ground conditions are good.
Where is strip footing used?
Strip footing is commonly used as foundations for load-bearing walls; and when the soil has good bearing capacity. It is preferred for low rise to medium-rise residential buildings. Here a strip of concrete runs below the entire length of the wall, thereby distributing the load from the walls to the ground.
What materials are used in strip foundations?
Dry, compact gravel or gravel and sand subsoils are usually adequate for strip foundations. Generally a depth of 700mm is acceptable, as long as the ground has adequate bearing capacity.
What is the minimum thickness of a strip foundation?
Commonly, the thickness of strip foundation is equal to the projection from the face of footing or the wall but it should not be less than 150mm. This minimum thickness is imposed to make sure that the strip foundation possess adequate rigidity and consequently be able to bridge weak pockets in soil.
What is the difference between strip and trench foundations?
Trench fill foundations are thinner in size than strip foundations but thicker in concrete. This type of foundation is preferred by self-builders, and so may be a good option if you are planning to build your own property.
How deep should a strip foundation be?
150mm to 500mm thick
Strip foundations should be 150mm to 500mm thick. Trench fill foundations should be greater than 500mm thick.
What are the materials used for strip foundation?
Strip foundations consist of a continuous strip, usually of concrete, formed centrally under load bearing walls.
Why is it called a strip foundation?
Strip footings, otherwise known as strip foundations, are a shallow foundation type, usually boasting a founding level that is no greater than 3m from the ground surface. As the name suggests, the formation is in a strip of linear structure that ultimately serves to spread the weight across the total area of the soil.
How is strip foundation constructed?
Strip foundations consist of a continuous strip of concrete formed centrally under loadbearing walls. The continuous strip acts as support for which walls are built and is to a width to spread the load evenly of the building on the ground underneath it, supporting it.
What are the types of strip foundation?
How thick are strip foundations?
What is the thickness of concrete for a strip foundation?
150mm
Commonly, the thickness of strip foundation is equal to the projection from the face of footing or the wall but it should not be less than 150mm. This minimum thickness is imposed to make sure that the strip foundation possess adequate rigidity and consequently be able to bridge weak pockets in soil.
When would you use strip foundation?
Strip foundations are one of the most commonly used foundations. They are generally used for ground where the subsoil is of a good bearing capacity. Strip foundations are designed for structures where the load is relatively modest, such as, low-to-medium rise domestic buildings.
How do you build a strip foundation?
Step by step procedure – Strip Footing
- Identify the positions of the load-bearing walls.
- Excavate the site at these positions and form a trench.
- Pour in lean concrete.
- Erect the formwork and install the bottom main bars.
- Installation of column starter bars follow.
- Binders are used to tie the column starter bars.