What is eccentricity in civil engineering?

What is eccentricity in civil engineering?

The degree to which two forms fail to share a common center; for example, in a pipe or tube whose inside is off-center toth regard to the outside. The degree of eccentricity can be expressed by a plus or minus wall thickness tolerance. ...

What is minimum eccentricity?

The minimum eccentricity recommended is similar to the minimum eccentricity formerly required in the design of axially loaded reinforced-concrete columns. In this approach, the moment is taken as the compressive load times an eccentricity of 1 in. or one-tenth the width of the column (0.

How do you calculate eccentric load?

It is now M=−P(y+e) M = − P ( y + e ) , where P is the compressive load, y is the column deflection, and e is the offset distance of the load relative to the vertical portion of the column, the eccentricity.

How do you calculate eccentric footing?

Adopt a rectangular footing of size 2m * 1.

What are the types of footing?

The different types of footings used in construction are described below:

• Continuous Wall Footing. The footing which supports a long masonry or RCC wall is known as a continuous footing. ...
• Isolated Footing. ...
• Combined Footing. ...
• Strip Footing. ...
• Strap Footing. ...
• Raft Footing. ...
• Pile Footing.

How do you calculate footing design?

Design Calculation of an Isolated Footing

1. INTRODUCTION. Footings are the bases laid on the soil on top of which a structure is erected. ...
2. PROPORTIONING OF FOOTING FOR COLUMN:
3. Column B:
4. Check for Bending Moment:
5. Check for One-way shear.
6. Check for two-way shear.
7. Check for Bearing Stress.
8. Check for Development Length.

Where is eccentric footing used?

This is used in cases where restrictions exist on the usable ground area outside of the build-up foundation area such as perimeter boundaries ( building is exactly at the boundary ), connecting buildings etc.

What is a cantilever footing?

A cantilever footing is a component of a building's foundation. It is a type of combined footing, consisting of two or more column footings connected by a concrete beam. ... It is used to help distribute the weight of either heavily or eccentrically loaded column footings to adjacent footings.

What is raft footing?

Raft foundations (sometimes referred to as raft footings or mat foundations) are formed by reinforced concrete slabs of uniform thickness (typically 150 mm to 300 mm) that cover a wide area, often the entire footprint of a building.

What is a pad footing?

Isolated footings (also known as Pad or Spread footings) are commonly used for shallow foundations in order to carry and spread concentrated loads, caused for example by columns or pillars. ... It is able to design the entire footing and to compute settlement, rotation and bearing capacity of the footing.

What are the three types of foundations?

But chances are your house has (or will have) one of these three foundations: full basement, crawlspace, or slab-on-grade. Other variations are possible. Here are the three main types of house foundations that you will encounter in residential construction.

What is the difference between a pier and a footing?

A pier is a concrete columns that's cast atop of a footing and is connected to the footing by steel rebar. The pier, built between the footing and the ground level, usually extends above ground level so wooden posts can be mechanically anchored to the pier.

How deep should my footings be?

Footings need to be minimum 1m deep by 600mm wide. We always trench fill with concrete. Final decision will be with building control, hope you dont have any large trees near.