Definition of spreadfooting : a footing in building construction that is shallow in proportion to its width and is usually made of reinforced concrete.
Where spread foundation is used?
Importance of Spread Footings While traditional spot footings only have a single point of contact with the foundation, spread footings extend support continuously across the entire building layout. Spread footings are used to support a foundation or set of piers below a building.
Where would a wide strip foundation be used?
Strip foundations can be used for most subsoils, but are most suitable for soil which is of relatively good bearing capacity. They are particularly suited to light structural loadings such as those found in many low-to-medium rise domestic buildings - where mass concrete strip foundations can be used.
How deep is a spread footing?
… nearly all are supported on spread footings, which are of two types—continuous footings that support walls and isolated pad footings that support concentrated loads. The footings themselves are usually made of concrete poured directly on undisturbed soil to a minimum depth of about 30 centimetres (12 inches).
What is a foundation spread?
A spreadfooting foundation has a wider bottom portion compared to a load-bearing foundation; the wider bottom "spreads" the weight of the structure over a larger area for greater stability. Spread footings are used to support a foundation or set of piers below a building.
What does a spreadfooting look like?
A spreadfooting foundation has a wider bottom portion compared to a load-bearing foundation; the wider bottom "spreads" the weight of the structure over a larger area for greater stability. Spread footings may be circular, square, or rectangular. · Spread footings are common in residential construction.
Where is spreadfooting used?
Spread footings are normally used under individual columns of buildings and bridge piers. They are economical to use and are applicable for any soil conditions where the bearing capacity for the applied loads is adequate.
What are the types of spread footing?
Spread footings may be circular, square, or rectangular.
What are the 3 types of foundations?
Foundation types vary, but likely your house or home's addition does or will have one of these three foundations: full or daylight basement, crawlspace, or concrete slab-on-grade.
How many types of foundation are there?
Again, in broad terms, there are three main types of foundations. These include individual footings, where the building load is supported by columns, each with its own footing. Then there are raft foundations, which are often used when basement construction is included in the building's plans.
What are the 4 types of foundation?
The four basic types of foundations— full basement, submerged crawl space, flush crawl space, and slab-on-grade—are shown in Figure 1-4. Of course, actual houses may include combinations of these types.
What is the minimum thickness for a spread footing?
Footings are an important part of foundation construction. They are typically made of concrete with rebar reinforcement that has been poured into an excavated trench. The purpose of footings is to support the foundation and prevent settling. Footings are especially important in areas with troublesome soils.
What is strip footing used for?
Strip foundations (or strip footings) are a type of shallow foundation that are used to provide a continuous and level (or sometimes stepped) strip of support to a linear structure, such as a wall or closely-spaced rows of columns built centrally above them.
What is simple wall footing?
A wall footing or strip footing is a continuous strip of concrete that serves to spread the weight of a load-bearing wall across an area of soil. It is the component of a shallow foundation.
What is the spread in construction?
When sureties and agents look at lump-sum construction bids, they must carefully consider the bid spread — that is, how far the winning bid is from the other bids submitted. If the spread between the winning bid and next-lowest bid is greater than 10%, further clarification is required.
What is spreadfooting design?
A type of footing is used in which the width of the foundation is less compare to the width and it is spread over a large area of foundation to transfer the column and structure load to the soil below the foundation safely.