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Design a Strong Building Structure with a Well-Constructed Underpinning System

on 16 June 2017

Underpinning is a method which is used to increase the depth of the foundations as well as helping to repair the current, faulty foundations. This a smart move to make for your building, especially if you plan to add additional stories to a pre-existing structure. 

One of the tell-tale signs that your building strongly need underpinning services is the appearance of visible cracks on the walls and buildings. A building strongly needs underpinning when the visible cracks are wider than ¼ inch, as these are signs of faulty foundations.


Reasons for Underpinning

There are several reasons why you might need underpinning services, such as:

  • If the original foundation of the building is weak, you will require a strong foundation to be able to add additional stories to the building.
  • If the surface of the soil has become weakened, to save the building from natural disasters like earthquakes or floods.

These are some reasons that may mean your building needs repair for the faulty foundations or to give strong foundations to the building by giving stratum to the building.


Tips to keep in mind while performing Underpinning

  • Underpinning must be started by working inwards and with corners.
  • Underpinning should only be done on load-bearing walls.
  • Don’t underpin below the non-load bearing walls.
  • You should add concrete to the cavity after the excavation process is completed. Mix one part of cement, 3 parts of sand and 6 parts of aggregates to the concrete.
  • Use formwork on the edges of the building
  • You can check the filing of the cavity in the foundation by using a rod bar
  • You must make sure that concrete is cured completely before loading it to the cavity
  • Break off the project footing once the concrete has gained ample strength


Underpinning using a pile and beam method

Doing underpinning using a pile and beam scheme is a great method to alleviate footing. Mini pile is installed on the other side of the affected walls, and after the piles installation, brickwork is removed from there and needle beam is used to make a connection between support walls and piles. If you reduce the distance between the needle beams, they will be able to support a higher load. Pile and beam methods are beneficial as it is suitable for some restricted access areas. It is also faster than the traditional method of underpinning, as well as being capable of bearing high loads and generating less disruption.

Underpinning is done to provide strength to the building. If you are facing structural problems, such as cracks on the walls of the building, especially if the size of the cracks is increasing, you should opt for underpinning work from piletech.co.uk, who strive to provide some of the highest quality services of underpinning for building and many other forms of constructions.

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