Capping beam - Revision history

Designing Buildings at 09:00, 30 September 2020

2020-09-30T09:00:20Z

← Older revision		Revision as of 09:00, 30 September 2020
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	* Types of beam.		* Types of beam.

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Designing Buildings at 07:37, 2 May 2018

2018-05-02T07:37:28Z

← Older revision		Revision as of 07:37, 2 May 2018
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−	Pile foundations are principally used to transfer ~~the~~ loads from superstructures, through weak, compressible strata or water onto stronger, more compact, less compressible and stiffer soil or rock at depth~~, increasing the effective size of a foundation and resisting horizontal loads~~. They are typically used for large structures, and in situations where soil is not suitable to prevent excessive settlement.	+	Pile foundations are a type of deep foundation. They are formed by long, slender, columnar elements typically made from steel or reinforced concrete, or sometimes timber. A foundation is described as 'piled' when its depth is more than three times its breadth.
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		+	Pile foundations are principally used to transfer loads from superstructures, through weak, compressible strata or water onto stronger, more compact, less compressible and stiffer soil or rock at depth. They are typically used for large structures, and in situations where soil is not suitable to prevent excessive settlement.

	Piles can be used individually to support loads or grouped and linked together with a reinforced concrete cap.		Piles can be used individually to support loads or grouped and linked together with a reinforced concrete cap.
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	This differs from a ground beam which is provided between adjacent pile caps as a structural element to improve the stability of the foundation. For more information, see Ground beams.		This differs from a ground beam which is provided between adjacent pile caps as a structural element to improve the stability of the foundation. For more information, see Ground beams.

−	Piles may be staggered in the beam to allow for any eccentricities that may occur in loaded conditions. If light loading is expected to result in only minor eccentricities, then the piles can be driven in a line beneath the capping beam’s centre.	+	Piles may be staggered along the beam to allow for any eccentricities that may occur in loaded conditions. If light loading is expected to result in only minor eccentricities, then the piles can be driven in a line beneath the capping beam’s centre.

−	The capping beam should be kept clear of the ground where the purpose of the piles is to overcome the problem of the subsoil ~~swell~~ and shrinkage. This can be done by casting the capping beam on polystyrene or other compressive material, thereby allowing an upward ground movement without damage to the beam.	+	The capping beam should be kept clear of the ground where the purpose of the piles is to overcome the problem of the subsoil swelling and shrinkage. This can be done by casting the capping beam on polystyrene or other compressive material, thereby allowing an upward ground movement without damage to the beam.

	An economical construction method that can be adopted is to construct concrete block walls to the exact sizes of the cap. Having first backfilled the wall with soil the space can then be filled with concrete. This cuts down on the need for formwork and the extra excavation required to position it.		An economical construction method that can be adopted is to construct concrete block walls to the exact sizes of the cap. Having first backfilled the wall with soil the space can then be filled with concrete. This cuts down on the need for formwork and the extra excavation required to position it.
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	* Types of beam.		* Types of beam.

−	[[Category:Construction_techniques]] [[Category:Products_/_components]]	+	[[Category:Construction_techniques]] [[Category:Products_/_components]] [[Category:DCN_Product_Knowledge]]

Editor at 14:21, 30 April 2018

2018-04-30T14:21:48Z

← Older revision		Revision as of 14:21, 30 April 2018
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	Piles can be used individually to support loads or grouped and linked together with a reinforced concrete cap.		Piles can be used individually to support loads or grouped and linked together with a reinforced concrete cap.

−	Pile caps can also be linked together with reinforced concrete ~~ground beams~~ to create a capping beam. At least three capped piles are needed to ensure stability against lateral forces (with the exception of caisson piles). Capping beams are also suitable for distributing the weight of a load-bearing wall, or of close-centred columns to a line of piles.	+	Pile caps can also be linked together with reinforced concrete to create a capping beam. At least three capped piles are needed to ensure stability against lateral forces (with the exception of caisson piles). Capping beams are also suitable for distributing the weight of a load-bearing wall, or of close-centred columns to a line of piles.

	This differs from a ground beam which is provided between adjacent pile caps as a structural element to improve the stability of the foundation. For more information, see Ground beams.		This differs from a ground beam which is provided between adjacent pile caps as a structural element to improve the stability of the foundation. For more information, see Ground beams.

Editor: Created page with "Pile foundations are principally used to transfer the loads from superstructures, through weak, compressible strata or water onto stronger, more compact, less compressible and st..."

2018-04-30T14:19:53Z

Created page with "Pile foundations are principally used to transfer the loads from superstructures, through weak, compressible strata or water onto stronger, more compact, less compressible and st..."

New page

Pile foundations are principally used to transfer the loads from superstructures, through weak, compressible strata or water onto stronger, more compact, less compressible and stiffer soil or rock at depth, increasing the effective size of a foundation and resisting horizontal loads. They are typically used for large structures, and in situations where soil is not suitable to prevent excessive settlement.

Piles can be used individually to support loads or grouped and linked together with a reinforced concrete cap.

Pile caps can also be linked together with reinforced concrete ground beams to create a capping beam. At least three capped piles are needed to ensure stability against lateral forces (with the exception of caisson piles). Capping beams are also suitable for distributing the weight of a load-bearing wall, or of close-centred columns to a line of piles.

This differs from a ground beam which is provided between adjacent pile caps as a structural element to improve the stability of the foundation. For more information, see Ground beams.

Piles may be staggered in the beam to allow for any eccentricities that may occur in loaded conditions. If light loading is expected to result in only minor eccentricities, then the piles can be driven in a line beneath the capping beam’s centre.

The capping beam should be kept clear of the ground where the purpose of the piles is to overcome the problem of the subsoil swell and shrinkage. This can be done by casting the capping beam on polystyrene or other compressive material, thereby allowing an upward ground movement without damage to the beam.

An economical construction method that can be adopted is to construct concrete block walls to the exact sizes of the cap. Having first backfilled the wall with soil the space can then be filled with concrete. This cuts down on the need for formwork and the extra excavation required to position it.

= Find out more =

=== Related articles on Designing Buildings Wiki ===

* Bearing capacity.
* Bored piles.
* Continuous flight auger piles.
* End-bearing piles.
* Friction piles.
* Ground beams.
* Pile foundations.
* Piling equipment.
* Screw pile foundations.
* Sheet piles.
* Types of beam.

[[Category:Construction_techniques]] [[Category:Products_/_components]]