The depth of a foundation for a two storey extension is the thickness required to sustain its weight. The calculation depends on the size, number and type of support posts that can be used with it. With different types of foundations there are different depths needed in order to avoid damage such as voids or settling

The “foundation depth for 2 storey building in nigeria” is an important question that needs to be answered before construction can begin. The foundation depth should be at least 8 feet deep, but the exact depth will depend on the site and soil conditions.

Strip foundations for a single story structure will normally be 450mm wide and at least 200mm deep, while foundations for two storeys will be 600mm wide and 200mm deep.

It’s also important to understand how deep foundations must be.

Footings should be dug to a depth of at least 12 inches below previously undisturbed soil. Footings must also be either frost-protected or reach at least 12 inches below the frost line (the depth at which the ground freezes in the winter). The breadth of the footings should be at least 12 inches.

Can my foundation sponsor a second floor in addition to the one mentioned above? The foundation is crucial! Homes without footings may settle unevenly, and adding more weight to the block might be devastating. If your house’s foundation can’t sustain a second storey in its present form but you’re intent on having one, you may want to explore underpinning.

In this case, how deep is a three-story building’s foundation?

For three (3) storey structures exceeding 25′ 0″ in height, the foundation walls must be a minimum of twelve inches (12″) thick.

How do you determine the depth of your foundation?

The following factors influence the foundation depth:

- Soil plasticity index.
- The tree has a high need for water.
- The tree’s mature height.
- If stepping foundations, the distance from the appropriate tree to the closest component of the foundations, as well as distances elsewhere.
- Allowance for the effects of the weather.

Answers to Related Questions

## When you lay a foundation, how long do you have to wait before you can start building?

Concrete should cure for at least seven days before being constructed on, according to Concrete Network. Waiting longer, on the other hand, considerably reduces the likelihood of the concrete breaking. Concrete cures for up to 28 days after it is poured, after which it achieves its full strength.

## How do you figure out how deep your footings should be?

How to Calculate the Size of a Footing

- Calculate the cement slab’s width and length in inches.
- To convert the width to feet, multiply it by 12.
- To convert the length to feet, multiply it by 12.
- In inches, determine the depth or thickness of the footing that is necessary.
- The width is multiplied by the length, and then by the depth.

## What are the three different kinds of foundations?

The kinds of foundations used in building are as follows:

- The foundation is quite thin. Isolated footing or individual footing. Footing that is both solid and flexible. Remove the foundation. The base might be a raft or a mat.
- The foundation is solid. The foundation is built atop a pile. Shafts or caissons that have been drilled.

## What is the usual foundation depth?

The foundation of a “simple footing” should be placed at a minimum depth of 1.50m from the ground level (GL) or at least 1.50 times the width of the footing. Because of the possibility of frost, the depth is kept at a minimum of 1.50m below the surface in cold areas.

## What is the depth of trench fill foundations?

Trench fill foundations with a depth more than 2.5 meters must be developed by an Engineer in line with Technical Requirement R5. It’s very crucial to double-check that the completed foundation level is right and horizontal while trench filling.

## What sort of foundation is ideal for a house?

The three basic foundation systems utilized on homes are basements, crawl spaces, and slabs. Houses are occasionally built on posts in damp and coastal environments. The slab is perhaps the most straightforward foundation to construct. It’s a concrete pad that’s been poured immediately on the ground.

## How much does laying a foundation cost?

The average cost of laying a foundation is $8,141, with most people paying between $3,995 and $12,287. The cost of a foundation varies from $4 to $7 per square foot, depending on the type: concrete, pier and beam, or crawl space. Depending on the sort of foundation you install, the cost of the installation may vary.

## What is the typical column size?

The overall weight on the columns determines the size of the columns. The column’s minimum size should not be less than 9″x9″. 9″x9″ columns with M15 (1:2:4) (cement: sand: aggregate) concrete grade are to be utilized for a single-story construction.

## Is Clay a Good Foundation Material?

The soils on which the foundations are built must be sturdy and robust. A well-structured soil is more stable. Because of their greater structure, clay textures are frequently more stable than sand textures. For engineering, however, a mixture of particle sizes (and pore diameters) is optimal (just as it is best for growing crops).

## What is the depth of a typical home foundation?

Begin any sort of foundation by digging footings that are at least 2 feet wide and as deep as the frost line; certain foundations may need additional width, up to 6 feet. Make sure the foundation is the right size for the structure.

## What are the processes to constructing an addition?

How to construct a house expansion in 19 simple stages

- Before you proceed, think about the following questions.
- Seek help from a seasoned extension expert.
- Calculate the expenses.
- Consider how you’ll pay for the extension.
- Calculate the expenses for each step of the project.
- Take advantage of the lower VAT rate for vacant homes.
- Determine whether or not you need planning clearance.

## Is it possible to construct a home out of sand?

The soil under the sand is tougher and more cohesive. You may effectively anchor your house by using the features of this other soil type. Pay great attention to vibrations while constructing on sand. Because vibration causes sand to settle, it might cause damage to your property or your neighbors’ property.

## Is it cheaper to expand out or add a second story?

It’s a smaller and typically less expensive choice for an addition. A bump-out is less costly in the long run than building a full-sized room, while the cost per square foot is often higher.

## How do you know whether you have enough material for a second story?

In my view, the first thing you should do is go to your local government’s zoning office. If you’re allowed to add a second floor, they should be able to inform you. Inquire about the entire height of the construction. Many construction and zoning rules limit the height of a structure to a certain number of feet above ground level.

## What is the maximum weight that a foundation can support?

There are three options. Depending on soil conditions in your location, log houses are intended to spread the weight of the house rather equally around the perimeter, and with the logs being approximately 16″ broad, it could easily hold roughly 3,500 lbs. per linear foot.

## How much does it cost to add a second story to a house?

Hiring a renovation contractor to create a second floor addition may cost as little as $100-$300 per square foot for a standard addition (2-3 bedrooms and a bath plus a flight of stairs), but as much as $400-$500 per square foot depending on the intricacy, quality of materials, and local labor costs.

## What is the definition of considerable depth?

Soil Exploration Depth. In other words, the depth below which the earth does not contribute to foundation settling. Significant depth is the word used to describe this depth. There is a lot of depth here. The following are some of the elements that influence substantial depth.