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Topic: Scarf Joint

	Departments
		The joint is readily found on frame members on new construction where a single piece of wood is not available to be of sufficient length.
		The basics of a good scarf joint is that the matting surface of the joint should be 8 to 12 times the thickness or depth of the material at the joint.
		Keels are scarfed differently from chines which are scarfed differently from frames, etc. The detail that remains the same is that the length to depth ratio is 8 to 1 or greater.
	www.acbs-bslol.com /Gadgets/Scarf.htm (1525 words)

	Scarf joint - Biocrawler (Site not responding. Last check: 2007-10-24)
		The joint was used where a length beyond that of the available timber or iron stock was required in the carpentry of timber-framed buildings or very commonly, in ship and boat-building.
		Scarf joints were also used in the days when iron was forge welded.
		The joint was finished by bolting it or perhaps strapping it together.
	www.biocrawler.com /encyclopedia/Scarf_joint (212 words)

	Scarf Joints (Site not responding. Last check: 2007-10-24)
		A scarf joint is made by joining two pieces of wood having tapered, beveled, or chamfered ends which over-lap together, as opposed to a butt joint where squared ends of the mating pieces simply butt together.
		Scarf joints are used to make longer members where single members of sufficient length are not available or are too costly.
		The amount of taper with a scarf joint is usually stated as the ratio of the thickness of the joining pieces to taper.
	www.acbsphl.org /Tips_and_hints/Scarf_Joint.htm (708 words)

	Epoxy Manual - Making scarf joints
		A scarf joint is made by joining two members having tapered, beveled, or chamfered ends which lap together, as opposed to a butt joint where squared ends of the mating members simply butt together.
		The amount of taper with a scarf joint is usually stated as the ratio of the thickness of the joining members to taper.
		Scarf joints or other joints that will be put under stress when unclamped should be allowed to cure 5 to 7 days, when it reaches its full strength, before removing clamps.
	www.glen-l.com /supplies/pxman-apscarf.html (800 words)

	Wood joints and adhesives
		Adhesive joints are designed to provide a continuous bond over as much surface as feasible whereas bolted or screwed joints apply pressure over a smaller area – and the associated holes tend to weaken the structure.
		Flat grain joints: in such jointing the grain of all members should be close to parallel and the strength of the joint is then dependent on the shear strength of the timber species.
		The bottom image shows the layout for a squinted scarf joint which avoids the feathered ends of a through slope; the squint is cut at an angle so that the butted areas are not solely end grain, however a squinted joint is unlikely to be applicable in an airframe primary structure.
	www.auf.asn.au /scratchbuilder/joints.html (6221 words)

	FanFiction.Net - Dictionary & Thesaurus (Site not responding. Last check: 2007-10-24)
		Scarp a scarf.] An article of dress of a light and decorative character, worn loosely over the shoulders or about the neck or the waist; a light shawl or handkerchief for the neck; also, a cravat; a neckcloth.
		(a) In a piece which is to be united to another by a scarf joint, the part of the end or edge that is tapered off, rabbeted, or notched so as to be thinner than the rest of the piece.
		[1913 Webster] Scarf joint (a) A joint made by overlapping and bolting or locking together the ends of two pieces of timber that are halved, notched, or cut away so that they will fit each other and form a lengthened beam of the same size at the junction as elsewhere.
	www.fanfiction.net /dictionary.php?word=scarf (361 words)

	scarf joint - definition of scarf joint by the Online Dictionary from Datasegment.com (Site not responding. Last check: 2007-10-24)
		(a) In a piece which is to be united to another by a scarf joint, the part of the end or edge that is tapered off, rabbeted, or notched so as to be thinner than the rest of the piece.
		[1913 Webster] Scarf joint (a) A joint made by overlapping and bolting or locking together the ends of two pieces of timber that are halved, notched, or cut away so that they will fit each other and form a lengthened beam of the same size at the junction as elsewhere.
		(b) A joint formed by welding, riveting, or brazing together the overlapping scarfed ends, or edges, of metal rods, sheets, etc. Scarf weld.
	onlinedictionary.datasegment.com /word/scarf+joint (180 words)

	-Scarfing Plywod Stitch and Glue Plywood Boat Construction -
		Scarfing and lofting seem to be the most intimidating steps in building a plywood boat.
		Scarfing plywood is the process of beveling the ends of two sheets of plywood and gluing them together to make one longer continuous sheet.
		After the panels are tacked in place another strip of plastic should be laid over the scarf joint and a 10" or 12" wide piece of plywood over that to evenly distribute the weight.
	www.boatbuilder.org /mudpeepscarfingandlofting.htm (1575 words)

	End Joint Gluing
		Scarf joints are made by chamfering, notching, or cutting away the ends of stock to correspond (or fit) to each other and subsequently securing them together by overlapping and gluing.
		Generally speaking, the method of preparation for finger and scarf joints is accomplished by first squaring of the end with a cut-off saw and then cutting the joint with a high speed cutterhead.
		Scarf joint glue lines are cured by use of a heated "hot shoe" or more frequently by radio frequency heating.
	www.woodweb.com /knowledge_base/End_Joint_Gluing.html?printfriendly (1605 words)

	MATC(MN)10 Geometric and Material Property Effects on the Strength of Rubber-Toughened Adhesive Joints (Site not responding. Last check: 2007-10-24)
		A series of simulated experiments using FEA were carried out on single-lap and scarf joint configurations to determine the effects of geometric parameters on joint strength (see [5]).
		Scarf joints were constructed from EN3B mild steel, which were bonded with XD4601, a single-part, toughened epoxy adhesive (supplied by Essex Betamate).
		The ends of the joints were modelled having a fillet with a concave surface with a radius equal in magnitude to the adhesive adhesive layer thickness.
	midas.npl.co.uk /midas/content/ma10.html (2507 words)

	SCARFFERRULE by T Salmi
		Scarf joint has been used traditionally especially in long salmon and Spey rods, to which metallic ferrules of good quality have been expensive and not easy to obtain.
		Typically the scarf joint was bound together using a rope, a leather strip etc. The joint is light but not as firm as metallic (nickelsilver) ferrule.
		You also have to add about 5" (10 cm, half of the joint length) to the length of the sections because the skew scarf joint decreases the real length of the rod with this amount.
	personal.inet.fi /private/tapani.salmi/SCARFFERRULE.HTML (804 words)

	Ship Modeling FAQ, Research Note Scarf Joints --- Revised: September 29, 2004
		Third, scarf joints with lips (perpendicular cuts at each end of the joint) 1/3 the breadth of the joint found in some cut kit parts for keels might be more for the kit maker's convenience than for historical accuracy.
		Fourth, the smaller the cross-section dimensions of the timber the longer the scarf joint tends to be.
		The scarf length for large timbers is usually 5x to 8x the depth of the timber (note Lloyd's requirement of 8x, and Chapelle's comment of "not less than three frame spaces in any case".) For planking and other thin materials the scarph length is usually 12x the material thickness.
	home.att.net /~ShipModelFAQ/ResearchNotes/smf-RN-ScarfJoints.html (3742 words)

	Woodwork > Joints used to lengthen wood
		The timber connectors bite into the wood as the joint is tightened, increasing the strength of the union.
		This type of joint is more suitable for lengthening lighter structures and is the easiest method of joining two timbers.
		The length of the joint should be equal to the width of the timber.
	www.diynot.com /pages/ww/ww017.php (685 words)

	Making plywood scarf and butt joints
		Butt joints are usually detailed in the plans, but basically consist of butting panels of plywood backed up with a butt block of the same thickness (minimum) as the plywood planking, extending 4" or more on each side of the joint.
		The scarf joint shown is at a ratio of 1:12 but some use a 1:10 ratio up to 1/2" and 1:8 for thicker plywood.
		The scarf joint length is found by multiplying the thickness of the plywood being joined by the ratio.
	www.glen-l.com /wood-plywood/scarf-butt.html (698 words)

	Scarfing Plywood
		The reason for the "table" is to support the first layer of plywood to be scarfed, as is gets thinner on the end there is tendency for it to bend down as pressure is applied with the scarfing tools, the table keeps it flat through out the scarfing process.
		Two of the scarfed panels that will be used for the bottom hull panels will be a little short so I am using a simple spline joint to add to the length of the panels.
		The spline joint is not a good structural joint for hull panels and should not be used as such.
	www.boatbuilder.org /godzilliscarfing.htm (1008 words)

	Re: Scarf joint or butt joint your choice on crown molding? - the winner
		Scarf takes a few seconds longer and time is money.
		There is an amazing amount of crappy joinery that can be concealed with the new caulks, and, with something that is going to be up near the ceiling, I believe the general idea is "no one will see it anyway".
		I think it is the same sort of attitude that puts finely carved details on the BACKS of gargoyles mounted on the heights of cathedrals, and, on the hidden undersides of pews.
	www.usenet.com /newsgroups/rec.woodworking/msg14561.html (303 words)

	Tips
		The reason for distributing the scarf joints is to make them as inconspicuous as possible and primarily to make the rail as strong as if there were no scarf joints in rail.
		A scarf joint is created by cutting a long diagonal taper on the end of a board and matching the taper on another board.
		It is important to make all of the scarf joints face the same direction, especially on a series of laminates that are being prepared for bending a handrail on a curved stair slope.
	www.lutescw.com /tips.html (1758 words)

	Result for Joint (Site not responding. Last check: 2007-10-24)
		scarf joint / scarf - a joint made by notching the ends of two pieces of timber or metal so that they will lock together end-to-end
		fetlock / fetlock joint - the joint between the cannon bone and the pastern
		elbow - the joint of a mammal or bird that corresponds to the human elbow
	www.esldictionary.org /go/joint (609 words)

	Duckworks (Site not responding. Last check: 2007-10-24)
		The basic idea of a scarf joint is to take the two ends you want to join and shave them down at a regular angle.
		If you think that the scarf on a thin piece of plywood won't be strong enough, but you still want a fairly smooth connection, you can use an inverse scarf joint.
		The inverse scarf joint doesn't produce a perfectly smooth transition from one piece of plywood to the other, but with a little creative belt-sander work, you can make it fairly smooth and it is a much stronger joint when working with very thin pieces of ply.
	www.duckworksmagazine.com /05/articles/scarfs/index.cfm (1033 words)

	Scarf Joint (Site not responding. Last check: 2007-10-24)
		Scarfing plywood is easily accomplished using a belt-sander or a sharp hand plane.
		Using this formula will result in a joint as strong as the rest of the material.
		One of the biggest mistakes people make is when gluing up the joints they apply too much pressure which can squeeze all of the glue out resulting in a weak joint.
	www.unclejohns.com /boat/scarf.htm (236 words)

	What's a Scarf Joint? - Woodworking.com
		Sandor Nagyszalanczy: A scarf joint is a long, tapered joint thatâs used to form a strong connection between the ends of two long sticks or boards, to make a single, strong piece thatâs even longer.
		There are two places youâll commonly see scarf joints: One is in the crown molding that surrounds the wall-ceiling boundary of a large room.
		Scarf joints are cut by mitering a pair of complementary angles on the ends of the parts to be joined.
	www.woodworking.com /article_archive.cfm?section=1&article=1778 (325 words)

	Definition of Scarf from dictionary.net
		To dress with a scarf, or as with a scarf; to cover with a loose wrapping.
		Scarf \Scarf\, n.; pl. Scarfs, rarely Scarves (sk[aum]rvz).
		(a) A joint made by overlapping and bolting or locking together the ends of two pieces of timber that are halved, notched, or cut away so that they will fit each other and form a lengthened beam of the same size at the junction as elsewhere.
	www.dictionary.net /scarf (289 words)

	Grand Finishes
		The scarf joint happens in the center of a wall(vs. a corner) where the two pieces meet to give the look of continuity.
		Glue the profiles together to form a tiny little outside mitered joint, which looks as if the molding is dying into the wall.
		To match two pieces in a scarf joint, try to cut the pieces so that (installed) they will sit on a stud.
	www.grandfinishes.com /step/step_molding.shtml (1388 words)

	JOINT DESIGN
		The edges of the joint must be perfectly square to maintain a uniform clearance between all parts of the joint.
		Butt joints are usually used where the double thickness of a lap joint is undesirable.
		A scarf angle of 30 degrees gives a bond area twice that of a 90-degree butt joint, and an angle of 19 1/2 degrees increases the bond area three times.
	www.tpub.com /steelworker1/60.htm (365 words)

	scarf - Search Results - MSN Encarta
		A Scarf joint is a means of joining usually wood, sometimes metal, end to end.
		A woman wearing a knitted scarf A scarf is a piece of textile, often long and narrow, usually worn on or near the head...
		Berroco hand-knitting yarns are used to knit or crochet fashion sweaters, ponchos, shawls, wraps...
	encarta.msn.com /encnet/refpages/search.aspx?q=scarf (226 words)

	FurnitureFind - Understanding All About Wood Joinery
		Cross Lapped Joint In a cross lapped joint, a rectangular groove is removed from both pieces of wood in the joint.
		Dado Joint Dado joints connect two pieces of wood by cutting a groove in one piece of wood which is equal to the width of the second piece.
		Scarf Joint B Another form of scarf joint uses a metal plate on each side of the boards to connect the boards solidly together.
	www.furniturefind.com /help/basics/2_30_wdjoin.aspx (979 words)

	Jim Michalak´s Article about joining plywood sheets
		When gluing the joint you must press it up against a firm surface while the glue cures, making sure nothing glues to that surface, and making sure the two pieces are secured lengthwise so the tapers don't push them apart as you apply clamping pressure.
		He has done scientific load tests of these joints and says the joint will be as strong as the base wood if you use one layer of fiberglass cloth in epoxy on each side of 1/4" plywood, two layers on 3/8" plywood, three layers on 1/2" plywood, and four layers on 3/4" plywood.
		At first it would appear that the joint is easily made by laying the ply pieces on the floor, taping one side with fiberglass, waiting to cure, flipping the panel and repeating on the other side.
	www.boatbuilding-links.de /Jim-Michalak/joining-plywood-sheets.html (1631 words)

	The Mavens' Word of the Day
		This scarf is a carpentry term that refers to a joint formed by overlapping the tapered (or otherwise-formed) ends of two pieces and then bolting them together.
		Scarf refers to both the overlapped ends and to the joint itself (called in full a scarf joint).
		Scarf is a variant of the earlier scoff, itself a slang word for 'to eat greedily' in use since the 1840s.
	www.randomhouse.com /wotd/index.pperl?date=19981130 (387 words)

	Jim Michalak's Newsletter - October 1, 2001
		The reason scarf joints have always been used to joint lumber pieces lengthwise is that a butt joint, where one end of a board is glued directly to the next board with cuts at 90 degrees, never works even with modern glues.
		The joint is all end grain to end grain with no chance of getting a good glue line as you would with a scarf joint, or even with a butt block joint where the glue is loaded in shear instead of tension.
		By using a scarf with a 6:1 slant, the glued area is over six times the area of a straight butt joint.
	marina.fortunecity.com /breakwater/274/2001/1001/Index.htm (1916 words)

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