Scarf Joint - Revision history

DT Online: Added Template

2016-06-04T16:15:05Z

Added Template

← Older revision		Revision as of 16:15, 4 June 2016
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			=====Description=====
	[https://en.wikipedia.org/wiki/Scarf_joint '''Scarf Joints'''] are '''Lengthening Joints''' used to join pieces of timber end to end. Timber often has to be lengthened in big projects such as garages, carports or floor renovation and, occasionally, it may be necessary to insert a length of timber when repairing or restoring furniture.		[https://en.wikipedia.org/wiki/Scarf_joint '''Scarf Joints'''] are '''Lengthening Joints''' used to join pieces of timber end to end. Timber often has to be lengthened in big projects such as garages, carports or floor renovation and, occasionally, it may be necessary to insert a length of timber when repairing or restoring furniture.

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	<span style="color: green">[[File:15to1ScarfJoint.png\|300px\|right]]'''Note:'''</span>		<span style="color: green">[[File:15to1ScarfJoint.png\|300px\|right]]'''Note:'''</span>
	<span style="color: green">In situations where neither of these strengthening solutions is achievable, maximum strength is obtained by ensuring that the '''Scarf Joint''' angle is no steeper than 1 in 15 and is cut along the line of the grain to minimise the amount of end grain appearing on the angled surface.</span>		<span style="color: green">In situations where neither of these strengthening solutions is achievable, maximum strength is obtained by ensuring that the '''Scarf Joint''' angle is no steeper than 1 in 15 and is cut along the line of the grain to minimise the amount of end grain appearing on the angled surface.</span>
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			=====Scarf Joint Variations=====

	~~----~~

	* '''Plain Scarf'''		* '''Plain Scarf'''
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	[[File:TaperedFingerWidening.png\|300px\|right]]		[[File:TaperedFingerWidening.png\|300px\|right]]
	Modern practice, arising from the need to preserve timber resources and made possible by modern tooling and adhesives, is to use '''[[Comb Joint\|Tapered Finger Joints]]''' extensively to join random lengths of timber stock together and to further combine these strips into wide boards ''(e.g. for table tops)''.		Modern practice, arising from the need to preserve timber resources and made possible by modern tooling and adhesives, is to use '''[[Comb Joint\|Tapered Finger Joints]]''' extensively to join random lengths of timber stock together and to further combine these strips into wide boards ''(e.g. for table tops)''.


			{{Wood Joints Buyers Guide}}


	[[Category:Wood Joints]]		[[Category:Wood Joints]]

DT Online: Added 15:1 Scarf description

2016-04-21T08:54:31Z

Added 15:1 Scarf description

← Older revision		Revision as of 08:54, 21 April 2016
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	When compared with the timbers they are joining, most '''Scarf Joints''' are weak and when used in construction often need strengthening by bolting additional '''Fish Plates''' on either side or fixing metal straps around them. Also, if timbers have to be joined to make a garden [https://en.wikipedia.org/wiki/Pergola '''Pergola'''] for example, it is good practice to make the joint over a supporting pillar.		When compared with the timbers they are joining, most '''Scarf Joints''' are weak and when used in construction often need strengthening by bolting additional '''Fish Plates''' on either side or fixing metal straps around them. Also, if timbers have to be joined to make a garden [https://en.wikipedia.org/wiki/Pergola '''Pergola'''] for example, it is good practice to make the joint over a supporting pillar.
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			<span style="color: green">[[File:15to1ScarfJoint.png\|300px\|right]]'''Note:'''</span>
			<span style="color: green">In situations where neither of these strengthening solutions is achievable, maximum strength is obtained by ensuring that the '''Scarf Joint''' angle is no steeper than 1 in 15 and is cut along the line of the grain to minimise the amount of end grain appearing on the angled surface.</span>



			----

	* '''Plain Scarf'''		* '''Plain Scarf'''

DT Online at 18:16, 21 February 2016

2016-02-21T18:16:47Z

← Older revision		Revision as of 18:16, 21 February 2016
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	~~Several~~ ''standard'' wood joints can also be used as '''Lengthening Joints''' in a '''Scarf Joint''' configuration ''(e.g. '''[[Halving Joint]]''', '''[[Dovetail Joint]]''', '''[[Bridle Joint]]''')'' as shown)''.		Variations of several ''standard'' wood joints can also be used as '''Lengthening Joints''' in a '''Scarf Joint''' configuration ''(e.g. '''[[Halving Joint]]''', '''[[Dovetail Joint]]''', '''[[Bridle Joint]]''')'' as shown)''.
	[[File:ScarfJoints.png\|750px\|center]]		[[File:ScarfJoints.png\|750px\|center]]

DT Online at 18:15, 21 February 2016

2016-02-21T18:15:03Z

← Older revision		Revision as of 18:15, 21 February 2016
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	* '''Keylocked Hooked Scarf with Nibs'''		* '''Keylocked Hooked Scarf with Nibs'''
	[[File:KeyedScarfJoints.png\|400px\|right]]		[[File:KeyedScarfJoints.png\|400px\|right]]
	''[[Keys, Tongues and Slip Feathers\|'Keys]]''' or '''[[Basic Machines\|Wedges]]''' can be added to tighten joints ''(with or without '''Hooks''')'' on assembly and will stop the joints loosening, but they do not add greatly to their strength.		'''[[Keys, Tongues and Slip Feathers\|Keys]]''' or '''[[Basic Machines\|Wedges]]''' can be added to tighten joints ''(with or without '''Hooks''')'' on assembly and will stop the joints loosening, but they do not add greatly to their strength.

DT Online: Added links

2016-02-21T18:14:21Z

Added links

← Older revision		Revision as of 18:14, 21 February 2016
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	* '''Keylocked Hooked Scarf with Nibs'''		* '''Keylocked Hooked Scarf with Nibs'''
	[[File:KeyedScarfJoints.png\|400px\|right]]		[[File:KeyedScarfJoints.png\|400px\|right]]
	'''Keys''' or ~~wedges~~ can be added to tighten joints ''(with or without '''Hooks''')'' on assembly and will stop the joints loosening, but they do not add greatly to their strength.		''[[Keys, Tongues and Slip Feathers\|'Keys]]''' or '''[[Basic Machines\|Wedges]]''' can be added to tighten joints ''(with or without '''Hooks''')'' on assembly and will stop the joints loosening, but they do not add greatly to their strength.

DT Online: Created article

2016-02-21T18:05:41Z

Created article

New page

[https://en.wikipedia.org/wiki/Scarf_joint '''Scarf Joints'''] are '''Lengthening Joints''' used to join pieces of timber end to end. Timber often has to be lengthened in big projects such as garages, carports or floor renovation and, occasionally, it may be necessary to insert a length of timber when repairing or restoring furniture.

When compared with the timbers they are joining, most '''Scarf Joints''' are weak and when used in construction often need strengthening by bolting additional '''Fish Plates''' on either side or fixing metal straps around them. Also, if timbers have to be joined to make a garden [https://en.wikipedia.org/wiki/Pergola '''Pergola'''] for example, it is good practice to make the joint over a supporting pillar.

* '''Plain Scarf'''
[[File:PlainScarfJoint.png|300px|right]]
The joining pieces are simply cut to a shallow angle and glued together. It is a weak joint, suitable only for repair and patching work in furniture, but if care is taken to match the grain, the finished repair will be hardly noticeable.

<div style="clear: both;"></div>
* '''Scarf with Nibs'''
[[File:NibbedScarfJoint.png|300px|right]]
If small shoulders or '''Nibs''' are added these provide a positive stop at the end of the joint. This may improve performance in '''[[Compression]]''' but will not improve '''[[Bending Strength]]''' and if exposed to such, the joint would need additional reinforcement.

<div style="clear: both;"></div>
* '''Hooked Scarf with Nibs'''
[[File:HookedScarfJoint.png|300px|right]]
To improve performance in '''[[Tension]]''', '''Hooks''' can be added as shown but, again, if exposed to '''[[Bending Strength|Bending]]''', the joint would need additional reinforcement.

<div style="clear: both;"></div>
* '''Keylocked Hooked Scarf with Nibs'''
[[File:KeyedScarfJoints.png|400px|right]]
'''Keys''' or wedges can be added to tighten joints ''(with or without '''Hooks''')'' on assembly and will stop the joints loosening, but they do not add greatly to their strength.

<div style="clear: both;"></div>
* '''Scarf Joint Reinforcement'''
[[File:ReinforcedScarfJoints.png |400px|right]]
'''Scarf Joints''' may be '''[[Nails and Pins|Nailed]]''', '''[[Woodscrews and Self-Tappers|Screwed]]''', or '''[[Nuts, Bolts and Washers|Bolted]]''' through but the addition of '''Fish Plates''' may be required for extra strength.
<div style="clear: both;"></div>

Several ''standard'' wood joints can also be used as '''Lengthening Joints''' in a '''Scarf Joint''' configuration ''(e.g. '''[[Halving Joint]]''', '''[[Dovetail Joint]]''', '''[[Bridle Joint]]''')'' as shown)''.
[[File:ScarfJoints.png|750px|center]]

<div style="clear: both;"></div>
[[File:TaperedFingerWidening.png|300px|right]]
Modern practice, arising from the need to preserve timber resources and made possible by modern tooling and adhesives, is to use '''[[Comb Joint|Tapered Finger Joints]]''' extensively to join random lengths of timber stock together and to further combine these strips into wide boards ''(e.g. for table tops)''.

[[Category:Wood Joints]]