Thin webbed joists - Revision history

Editor at 17:31, 9 February 2022

2022-02-09T17:31:25Z

← Older revision		Revision as of 17:31, 9 February 2022
Line 38:		Line 38:
	* Engineered wood rim board.		* Engineered wood rim board.
	* Joist.		* Joist.
		+	* Metal web joists.
	* Timber post and beam construction.		* Timber post and beam construction.
	* Timber engineered structural frames.		* Timber engineered structural frames.

Editor at 13:35, 9 February 2022

2022-02-09T13:35:31Z

← Older revision		Revision as of 13:35, 9 February 2022
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	\| [[File:IJoist.jpg\|link=File:IJoist.jpg]]		\| [[File:IJoist.jpg\|link=File:IJoist.jpg]]
	\|-		\|-
−	\| This thin webbed joist was made from strength graded timber and oriented strand boards.	+	\| This thin webbed joist was made from strength graded timber and oriented strand boards (OSBs).
	\|}		\|}

	= Introduction =		= Introduction =

−	[https://www.structuraltimber.co.uk/assets/InformationCentre/timberframeeb2.pdf Engineered wood products and an introduction to timber structural systems], published by the Structural Timber Association defines thin webbed ~~joists~~ as: ‘an engineered wood product (EWP) manufactured with flanges made from softwood or laminated veneer lumber (LVL) with glued thin webs generally made from oriented strand boards (OSBs), fibreboard or plywood. Thin webbed joists can be used to resist either flexural or axial loads or a combination of both.’	+	[https://www.structuraltimber.co.uk/assets/InformationCentre/timberframeeb2.pdf Engineered wood products and an introduction to timber structural systems], published by the Structural Timber Association, defines a thin webbed joist as: ‘an engineered wood product (EWP) manufactured with flanges made from softwood or laminated veneer lumber (LVL) with glued, thin webs generally made from oriented strand boards (OSBs), fibreboard or plywood. Thin webbed joists can be used to resist either flexural or axial loads or a combination of both.’

	= Characteristics =		= Characteristics =

−	Thin webbed joists are also known as I-joists (or I joists)~~. Their~~ cross section ~~is “I” shaped, which is why they are referred to as I-joists~~.	+	Thin webbed joists are also known as I-joists (or I joists) due to the “I” shape of their cross section.

	{\|		{\|
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	\|}		\|}

−	I-joists are relatively light and have ~~great~~ strength in relation to their size. They are also generally believed to be easier to handle and are less likely than equivalent solid timber sections to become misshapen or to split~~. They can even help reduce the likelihood of squeaky floors~~.	+	I-joists are relatively light and have significant strength in relation to their size. They are also generally believed to be easier to handle and are less likely than equivalent solid timber sections to become misshapen or to split.

−	[https://jji-joists.s3.amazonaws.com/EWP-COP.pdf The Code of Practice for Engineered Wood Products] published by the Engineered Wood Products Committee of the UK Timber Frame Association states that I-joists “are made using a continuous process in lengths up to 20m and are cut to the desired length either in a factory prior to delivery or on site. The flanges have a pre-formed rout into which the bevelled web section is glued using an adhesive that has been approved for structural purposes (meaning they should either comply with Type I specification as defined in BS EN 301 or should be an equivalent strength and durability as verified by independent third party assessment and certification).’	+	[https://jji-joists.s3.amazonaws.com/EWP-COP.pdf The Code of Practice for Engineered Wood Products] published by the Engineered Wood Products Committee of the UK Timber Frame Association, states that I-joists “are made using a continuous process in lengths up to 20m and are cut to the desired length either in a factory prior to delivery or on site. The flanges have a pre-formed rout into which the bevelled web section is glued using an adhesive that has been approved for structural purposes (meaning they should either comply with Type I specification as defined in BS EN 301 or should be an equivalent strength and durability as verified by independent third party assessment and certification).’

−	Service runs for mechanical and electrical infrastructure can sometimes be installed ~~through thin webbed joists. They can be used~~ in ~~conjunction~~ with ~~several applications, including:~~	+	Service runs for mechanical and electrical infrastructure can sometimes be installed in conjuntion with I-joists and can help reduce the likelihood of squeaky floors.

−	~~Floor and roof joists (however, open web joists also known as metal web joists are sometimes preferred over thin webbed joists for these~~ applications).	+	They can be used with several applications, including:

		+	* Floor and roof joists (however, open web joists also known as metal web joists are sometimes preferred over thin webbed joists for these applications).
	* Formwork.		* Formwork.
	* Ceilings.		* Ceilings.

Editor at 18:03, 8 February 2022

2022-02-08T18:03:21Z

← Older revision		Revision as of 18:03, 8 February 2022
Line 36:		Line 36:

	* Engineered wood rim board.		* Engineered wood rim board.
−	* In-situ reinforcement of timber beams.
	* Joist.		* Joist.
	* Timber post and beam construction.		* Timber post and beam construction.

Editor at 18:01, 8 February 2022

2022-02-08T18:01:02Z

← Older revision		Revision as of 18:01, 8 February 2022
Line 1:		Line 1:
	{\|		{\|
−	\| [[File:IJoist.jpg]]	+	\| [[File:IJoist.jpg\|link=File:IJoist.jpg]]
	\|-		\|-
	\| This thin webbed joist was made from strength graded timber and oriented strand boards.		\| This thin webbed joist was made from strength graded timber and oriented strand boards.
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	{\|		{\|
−	\| [[File:IJoist2.jpg]]	+	\| [[File:IJoist2.jpg\|link=File:IJoist2.jpg]]
	\|-		\|-
	\| This cross section illustrates the "I" shape associated with the name, I-joist.		\| This cross section illustrates the "I" shape associated with the name, I-joist.
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	= Related articles on Designing Buildings =		= Related articles on Designing Buildings =
		+
		+	* Engineered wood rim board.
		+	* In-situ reinforcement of timber beams.
		+	* Joist.
		+	* Timber post and beam construction.
		+	* Timber engineered structural frames.
		+	* Types of flooring.

	= External resources =		= External resources =
Line 39:		Line 46:
	* Engineered Wood Products Committee, UK Timber Frame Association, [https://jji-joists.s3.amazonaws.com/EWP-COP.pdf The Code of Practice for Engineered Wood Products].		* Engineered Wood Products Committee, UK Timber Frame Association, [https://jji-joists.s3.amazonaws.com/EWP-COP.pdf The Code of Practice for Engineered Wood Products].
	* Structural Timber Association, [https://www.structuraltimber.co.uk/assets/InformationCentre/timberframeeb2.pdf Engineered wood products and an introduction to timber structural systems].		* Structural Timber Association, [https://www.structuraltimber.co.uk/assets/InformationCentre/timberframeeb2.pdf Engineered wood products and an introduction to timber structural systems].
		+
		+	[[Category:DCN_Definition]] [[Category:Definitions]] [[Category:Construction_techniques]]

Editor: Created page with "{| | File:IJoist.jpg |- | This thin webbed joist was made from strength graded timber and oriented strand boards. |} = Introduction = [https://www.structuraltimber.co.uk/as..."

2022-02-08T17:54:48Z

Created page with "{| | File:IJoist.jpg |- | This thin webbed joist was made from strength graded timber and oriented strand boards. |} = Introduction = [https://www.structuraltimber.co.uk/as..."

New page

{|
| [[File:IJoist.jpg]]
|-
| This thin webbed joist was made from strength graded timber and oriented strand boards.
|}

= Introduction =

[https://www.structuraltimber.co.uk/assets/InformationCentre/timberframeeb2.pdf Engineered wood products and an introduction to timber structural systems], published by the Structural Timber Association defines thin webbed joists as: ‘an engineered wood product (EWP) manufactured with flanges made from softwood or laminated veneer lumber (LVL) with glued thin webs generally made from oriented strand boards (OSBs), fibreboard or plywood. Thin webbed joists can be used to resist either flexural or axial loads or a combination of both.’

= Characteristics =

Thin webbed joists are also known as I-joists (or I joists). Their cross section is “I” shaped, which is why they are referred to as I-joists.

{|
| [[File:IJoist2.jpg]]
|-
| This cross section illustrates the "I" shape associated with the name, I-joist.
|}

I-joists are relatively light and have great strength in relation to their size. They are also generally believed to be easier to handle and are less likely than equivalent solid timber sections to become misshapen or to split. They can even help reduce the likelihood of squeaky floors.

[https://jji-joists.s3.amazonaws.com/EWP-COP.pdf The Code of Practice for Engineered Wood Products] published by the Engineered Wood Products Committee of the UK Timber Frame Association states that I-joists “are made using a continuous process in lengths up to 20m and are cut to the desired length either in a factory prior to delivery or on site. The flanges have a pre-formed rout into which the bevelled web section is glued using an adhesive that has been approved for structural purposes (meaning they should either comply with Type I specification as defined in BS EN 301 or should be an equivalent strength and durability as verified by independent third party assessment and certification).’

Service runs for mechanical and electrical infrastructure can sometimes be installed through thin webbed joists. They can be used in conjunction with several applications, including:

Floor and roof joists (however, open web joists also known as metal web joists are sometimes preferred over thin webbed joists for these applications).

* Formwork.
* Ceilings.
* Loadbearing studs.
* Cladding support.
* Prefabricated cassette floors.

= Related articles on Designing Buildings =

= External resources =

* Engineered Wood Products Committee, UK Timber Frame Association, [https://jji-joists.s3.amazonaws.com/EWP-COP.pdf The Code of Practice for Engineered Wood Products].
* Structural Timber Association, [https://www.structuraltimber.co.uk/assets/InformationCentre/timberframeeb2.pdf Engineered wood products and an introduction to timber structural systems].