Psi - Revision history

Designing Buildings at 08:28, 17 August 2022

2022-08-17T08:28:52Z

← Older revision		Revision as of 08:28, 17 August 2022
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	Psi should not be confused with PSI, which might also be found in the construction field and stands for pounds per square inch (PSI). PSI is a measurement of pressure in the Imperial system of measurement, commonly used to measure the pneumatic pressure of gasses or the hydraulic pressure of liquids. PSI is also used as a measure of tensile strength, as a resistance to pulling forces, and elastic modulus strength, defined as resistance to deformation ie the stiffness of materials.		Psi should not be confused with PSI, which might also be found in the construction field and stands for pounds per square inch (PSI). PSI is a measurement of pressure in the Imperial system of measurement, commonly used to measure the pneumatic pressure of gasses or the hydraulic pressure of liquids. PSI is also used as a measure of tensile strength, as a resistance to pulling forces, and elastic modulus strength, defined as resistance to deformation ie the stiffness of materials.
		+
		+	NB [https://www.futurehomes.org.uk/guidance Part L 2021 Where to start, A guide for housebuilders and their advisors, Masonry construction], published by the Future Homes Hub in June 2022, states Psi-value or linear thermal transmittance is: ‘the measure of heat loss along a non-repeating thermal bridge calculated as per guidance in BR 497 (2nd edition 2016) and IP 1/06 (2006); expressed in terms of W/mK.’
		+
		+	See also: Linear thermal transmittance.

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

	* Air tightness in buildings.		* Air tightness in buildings.
−	* Cavity wall insulation.
−	* Computational fluid dynamics.
−	* Computational fluid dynamics in building design: An introduction FB 69.
−	* Conventions for U-value calculations (2006 edition) BR 443.
−	* Floor insulation.
	* g-value.		* g-value.
	* k-value.		* k-value.
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	* Limiting fabric parameters.		* Limiting fabric parameters.
	* Linear thermal transmittance.		* Linear thermal transmittance.
−	* Roof insulation.
−	* Solid wall insulation.
−	* Standard Assessment Procedure SAP.
−	* Thermal admittance.
	* Thermal bridge.		* Thermal bridge.
−	* Thermal mass.
−	* Thermographic survey.
	* U value.		* U value.
−	* U-value conventions in practice: Worked examples using BR 443.

	[[Category:DCN_Definition]] [[Category:DCN_Product_Knowledge]] [[Category:DCN_Specification]] [[Category:Definitions]] [[Category:Standards_/_measurements]] [[Category:Sustainability]] [[Category:Construction_techniques]] [[Category:Design]] [[Category:Procurement]] [[Category:Products_/_components]]		[[Category:DCN_Definition]] [[Category:DCN_Product_Knowledge]] [[Category:DCN_Specification]] [[Category:Definitions]] [[Category:Standards_/_measurements]] [[Category:Sustainability]] [[Category:Construction_techniques]] [[Category:Design]] [[Category:Procurement]] [[Category:Products_/_components]]

Designing Buildings at 08:13, 26 July 2022

2022-07-26T08:13:35Z

← Older revision		Revision as of 08:13, 26 July 2022
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	Psi, also written with the Greek letter ψ has many different uses including in psychology, quantum mechanics and computing as well as in the design and construction of buildings.		Psi, also written with the Greek letter ψ has many different uses including in psychology, quantum mechanics and computing as well as in the design and construction of buildings.

−	In terms of ~~the~~ building design the Psi or Ψ value is the property of a thermal bridge junction between two elements and expresses the rate of heat flow per unit length of at thermal bridge. It might be considered as an adjustment figure for performance and is considered when calculating or allowing for U values and het loss in building fabric.	+	In terms of building design the Psi or Ψ value is the property of a thermal bridge junction between two elements and expresses the rate of heat flow per unit length of at thermal bridge. It might be considered as an adjustment figure for performance and is considered when calculating or allowing for U values and het loss in building fabric.

−	Psi should not be confused with PSI, which might also be found in the construction field and stands for ~~Pounds~~ per square inch (PSI). PSI is a measurement of pressure in the Imperial system of measurement, commonly used to measure pneumatic pressure of gasses or hydraulic pressure of liquids. PSI is also used as a measure of tensile strength, as a resistance to pulling forces, and elastic modulus strength, defined as resistance to deformation ie stiffness of materials.	+	Psi should not be confused with PSI, which might also be found in the construction field and stands for pounds per square inch (PSI). PSI is a measurement of pressure in the Imperial system of measurement, commonly used to measure the pneumatic pressure of gasses or the hydraulic pressure of liquids. PSI is also used as a measure of tensile strength, as a resistance to pulling forces, and elastic modulus strength, defined as resistance to deformation ie the stiffness of materials.
−		+
−	When calculating adjustments different Ψ values there will normally be different values for different elements such as windows Ψw, doors Ψd or numerically determined junctions such as Ψ1, Ψ2, Ψ3 etc	+

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

Editor: Created page with "Psi, also written with the Greek letter ψ has many different uses including in psychology, quantum mechanics and computing as well as in the design and construction of buildings..."

2022-07-13T12:32:28Z

Created page with "Psi, also written with the Greek letter ψ has many different uses including in psychology, quantum mechanics and computing as well as in the design and construction of buildings..."

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Psi, also written with the Greek letter ψ has many different uses including in psychology, quantum mechanics and computing as well as in the design and construction of buildings.

In terms of the building design the Psi or Ψ value is the property of a thermal bridge junction between two elements and expresses the rate of heat flow per unit length of at thermal bridge. It might be considered as an adjustment figure for performance and is considered when calculating or allowing for U values and het loss in building fabric.

Psi should not be confused with PSI, which might also be found in the construction field and stands for Pounds per square inch (PSI). PSI is a measurement of pressure in the Imperial system of measurement, commonly used to measure pneumatic pressure of gasses or hydraulic pressure of liquids. PSI is also used as a measure of tensile strength, as a resistance to pulling forces, and elastic modulus strength, defined as resistance to deformation ie stiffness of materials.

When calculating adjustments different Ψ values there will normally be different values for different elements such as windows Ψw, doors Ψd or numerically determined junctions such as Ψ1, Ψ2, Ψ3 etc

= Related articles on Designing Buildings =

* Air tightness in buildings.
* Cavity wall insulation.
* Computational fluid dynamics.
* Computational fluid dynamics in building design: An introduction FB 69.
* Conventions for U-value calculations (2006 edition) BR 443.
* Floor insulation.
* g-value.
* k-value.
* Heat transfer.
* Insulation specification.
* Limiting fabric parameters.
* Linear thermal transmittance.
* Roof insulation.
* Solid wall insulation.
* Standard Assessment Procedure SAP.
* Thermal admittance.
* Thermal bridge.
* Thermal mass.
* Thermographic survey.
* U value.
* U-value conventions in practice: Worked examples using BR 443.

[[Category:DCN_Definition]] [[Category:DCN_Product_Knowledge]] [[Category:DCN_Specification]] [[Category:Definitions]] [[Category:Standards_/_measurements]] [[Category:Sustainability]] [[Category:Construction_techniques]] [[Category:Design]] [[Category:Procurement]] [[Category:Products_/_components]]