The guidance in NHBC Standards Chapter 4.2 should be followed when building near trees.

Building Regulations. Indeed, the insurance industry spends approximately £350 million a year on repairs to properties that have been damaged after foundation movement.
The changes mainly reflect regulation number changes as a result of re-ordering. The Building Regulations 2010 cover the construction and extension of buildings and these regulations are supported by Approved Documents.

The depth is almost as half the height of the building itself and piles are embedded before finally pouring the foundations. The design should specify the minimum foundation depth. To stop smells entering a building, the open end of the ventilating pipe should be at least three metres to the side of, or extended to 0.9m above, any opening into a building. The regulations are developed by the UK government and approved by Parliament. The 2010 amendments reflect the Building Regulations 2010 and Building (Approved Inspectors etc) Regulations 2010. MAIN CHANGES IN … A seismic isolation foundation is also used for earthquake proofing a building. In shrinkable soils, the minimum foundation depth should be as in the following table: Volume change potential: Minimum depth (m) High: 1.0: Medium: 0.9: Low: 0.75: These minimum depths may only be used where any existing or proposed trees or shrubs are outside the zone of tree influence (See Chapter 4.2 'Building near trees' … This can lead to damage at the junction between old and new structures. The minimum depth of foundation is the most important factor which affects the stability of footings. Approved Documents set … The depth a traditional strip foundation is generally equal to or greater than the overall wall width, and the foundation width is generally three times the width of the supported wall. Here we discuss the minimum depth of foundation based on the type of soil. Minimum foundation depths should be measured from the reduced level where the reduced level will be the ˜nished ground level. Shallow foundations are only about 1 to 2 metres in depth and mostly used in the construction of one to four storey buildings.


a WC and washbasin) may be connected directly to the drain without a ventilating pipe. This results in the load being transmitted at 45º from the wall base to the soil.

This edition covers the loadings on a building, and the construction of the structural elements including the foundations, walls, floors, roofs and chimneys. This printing incorporates editorial amendments and corrections. Hence the foundation should be located at a minimum depth, that the footing gets maximum stability and it can easily transfer the load of the structure to the ground. ANSWER Foundations should extend a minimum of 100mm into the speci˜ed/required bearing strata and below the level of any desiccation.


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