Rafter - Revision history

Editor at 19:33, 23 August 2021

2021-08-23T19:33:20Z

← Older revision		Revision as of 19:33, 23 August 2021
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	* Barge rafter: On a gable end this is the outermost rafter and is sometimes used to form a roof overhang.		* Barge rafter: On a gable end this is the outermost rafter and is sometimes used to form a roof overhang.

−	~~= Find out more =~~	+	= Related articles on Designing Buildings Wiki =
−		+
−	=== Related articles on Designing Buildings Wiki ===	+

	* Braced frame.		* Braced frame.
	* Domestic roofs.		* Domestic roofs.
		+	* Hammerbeam roof.
	* Long span roof.		* Long span roof.
	* Pitched roof.		* Pitched roof.

121.7.233.101 at 02:48, 31 October 2020

2020-10-31T02:48:48Z

← Older revision		Revision as of 02:48, 31 October 2020
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−	A rafter is a structural component that is used as part of a roof construction. Typically, it runs from the ridge or hip of the roof to the wall plate of the external wall. Rafters are generally laid in series, side by side, providing a base to support roof decks, roof coverings and so on. ~~Coorect~~	+	A rafter is a structural component that is used as part of a roof construction. Typically, it runs from the ridge or hip of the roof to the wall plate of the external wall. Rafters are generally laid in series, side by side, providing a base to support roof decks, roof coverings and so on.

	Rafters are typically made of timber or steel and can be concealed within the roof structure, or can be left exposed to the spaces below. The may have battens laid on top of and perpendicular to them, to fix the roof covering to.		Rafters are typically made of timber or steel and can be concealed within the roof structure, or can be left exposed to the spaces below. The may have battens laid on top of and perpendicular to them, to fix the roof covering to.

121.7.233.101 at 02:48, 31 October 2020

2020-10-31T02:48:14Z

← Older revision		Revision as of 02:48, 31 October 2020
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	\|}		\|}

−	A rafter is a structural component that is used as part of a roof construction. Typically, it runs from the ridge or hip of the roof to the wall plate of the external wall. Rafters are generally laid in series, side by side, providing a base to support roof decks, roof coverings and so on.	+	A rafter is a structural component that is used as part of a roof construction. Typically, it runs from the ridge or hip of the roof to the wall plate of the external wall. Rafters are generally laid in series, side by side, providing a base to support roof decks, roof coverings and so on. Coorect

	Rafters are typically made of timber or steel and can be concealed within the roof structure, or can be left exposed to the spaces below. The may have battens laid on top of and perpendicular to them, to fix the roof covering to.		Rafters are typically made of timber or steel and can be concealed within the roof structure, or can be left exposed to the spaces below. The may have battens laid on top of and perpendicular to them, to fix the roof covering to.

Designing Buildings at 07:40, 10 September 2020

2020-09-10T07:40:25Z

← Older revision		Revision as of 07:40, 10 September 2020
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	* Types of roof.		* Types of roof.

−	[[Category:~~Construction_techniques~~]] [[Category:~~Products_/_components~~]] [[Category:DCN_Product_Knowledge]]	+	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge]] [[Category:Construction_techniques]] [[Category:Products_/_components]]

Editor at 17:56, 19 April 2018

2018-04-19T17:56:12Z

← Older revision		Revision as of 17:56, 19 April 2018
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	* Purlins.		* Purlins.
	* Roofing defects.		* Roofing defects.
		+	* Sheathing.
	* Types of beam.		* Types of beam.
	* Types of roof.		* Types of roof.

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

Editor at 15:34, 18 April 2018

2018-04-18T15:34:44Z

← Older revision		Revision as of 15:34, 18 April 2018
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	{\|		{\|
−	\| [[File:Rafters.jpg]]	+	\| [[File:Rafters.jpg\|link=File:Rafters.jpg]]
	\|}		\|}

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	* Pitched roof.		* Pitched roof.
	* Portal frame.		* Portal frame.
		+	* Post.
	* Purlins.		* Purlins.
	* Roofing defects.		* Roofing defects.

Designing Buildings at 16:48, 20 March 2018

2018-03-20T16:48:01Z

← Older revision		Revision as of 16:48, 20 March 2018
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		+	{\|
		+	\| [[File:Rafters.jpg]]
		+	\|}
		+
	A rafter is a structural component that is used as part of a roof construction. Typically, it runs from the ridge or hip of the roof to the wall plate of the external wall. Rafters are generally laid in series, side by side, providing a base to support roof decks, roof coverings and so on.		A rafter is a structural component that is used as part of a roof construction. Typically, it runs from the ridge or hip of the roof to the wall plate of the external wall. Rafters are generally laid in series, side by side, providing a base to support roof decks, roof coverings and so on.

Designing Buildings at 16:21, 20 March 2018

2018-03-20T16:21:56Z

← Older revision		Revision as of 16:21, 20 March 2018
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−	A rafter is a structural component that is used as part of a roof construction. It runs ~~diagonally~~ from the ridge or hip of the roof to the wall plate of the external wall. ~~A rafter is designed to form part of a~~ series ~~that supports the roof load and provides~~ a ~~foundation for the~~ roof ~~deck~~ and ~~coverings~~.	+	A rafter is a structural component that is used as part of a roof construction. Typically, it runs from the ridge or hip of the roof to the wall plate of the external wall. Rafters are generally laid in series, side by side, providing a base to support roof decks, roof coverings and so on.

−	Rafters are typically made of timber and can ~~sometimes (e.g. in traditional domestic buildings)~~ be left exposed and ~~polished or painted~~.	+	Rafters are typically made of timber or steel and can be concealed within the roof structure, or can be left exposed to the spaces below. The may have battens laid on top of and perpendicular to them, to fix the roof covering to.

−	Rafters can be used as a key component of various ~~different~~ types of roof design. The couple roof comprises two ~~lengths of timber (~~rafters) leaning against each other, tied where they meet at the top. The rafters sit on a wall plate which ~~provides a fixing point for the feet of the rafters, and~~ is an efficient means of spreading the load exerted by the roof structure down through the walls without creating pressure points where each rafter meets the wall.	+	Rafters can be used as a key component of various types of roof design. The couple roof comprises two rafters leaning against each other, tied where they meet at the top. The rafters sit on a wall plate which is an efficient means of spreading the load exerted by the roof structure down through the walls without creating pressure points where each rafter meets the wall.

−	A closed couple roof adds ceiling joists ~~(a length of timber~~ running horizontally ~~in-~~between the rafter feet), to make the structure much more ~~secure~~.	+	A closed couple roof adds ceiling joists running horizontally between the rafter feet, to support a ceiling and to make the structure much more rigid.

−	In order to increase potential roof spans without compromising wall stability, increasing rafter sizes or attracting extra costs, purlins were introduced. By installing a purlin into the roof structure, rafters ~~were given extra support and~~ no longer needed to be as thick and heavy, allowing a potential ~~span of 8 m~~.	+	In order to increase potential roof spans without compromising wall stability, increasing rafter sizes or attracting extra costs, purlins were introduced. These run perpendicular to rafters, providing additional stiffness. By installing a purlin into the roof structure, rafters no longer needed to be as thick and heavy, allowing larger potential spans.

	In modern house construction, the most common form of rafter is known as the fink or 'w' trussed rafter. This consists of a rafter incorporating tension and compression members in the shape of a W. This is capable of spans up to 12 m and can be designed to accommodate many different pitch angles.		In modern house construction, the most common form of rafter is known as the fink or 'w' trussed rafter. This consists of a rafter incorporating tension and compression members in the shape of a W. This is capable of spans up to 12 m and can be designed to accommodate many different pitch angles.
		+
		+	For more information see: [[Domestic_roofs#Trussed_rafters\|Trussed rafters]]

	The most common types of rafter include:		The most common types of rafter include:

	* Principal rafter: Usually the largest type of rafter located at the ends of a roof structure.		* Principal rafter: Usually the largest type of rafter located at the ends of a roof structure.
−	* Common rafter: Smaller ~~and are~~ located in between the principals at both ends.	+	* Common rafter: Smaller rafters located in between the principals at both ends.
	* Auxiliary rafter: Less common but can be used to support and reinforce a principal rafter.		* Auxiliary rafter: Less common but can be used to support and reinforce a principal rafter.
	* Compass rafter: Curved or bowed at the top or at both the top and bottom surfaces.		* Compass rafter: Curved or bowed at the top or at both the top and bottom surfaces.

Editor at 17:34, 13 March 2018

2018-03-13T17:34:17Z

← Older revision		Revision as of 17:34, 13 March 2018
Line 31:		Line 31:
	* Domestic roofs.		* Domestic roofs.
	* Long span roof.		* Long span roof.
		+	* Pitched roof.
	* Portal frame.		* Portal frame.
	* Purlins.		* Purlins.

Editor at 17:13, 9 March 2018

2018-03-09T17:13:57Z

← Older revision		Revision as of 17:13, 9 March 2018
Line 33:		Line 33:
	* Portal frame.		* Portal frame.
	* Purlins.		* Purlins.
		+	* Roofing defects.
	* Types of beam.		* Types of beam.
	* Types of roof.		* Types of roof.

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