Construction

All structure & construction which uses in interior design project will be published here.

=======================================================================================================

Woodworking Joints (in Bahasa. Sambungan Kayu)

mebel001

Joinery is a part of woodworking that involves joining together pieces of wood, to create furniture, structures, toys, and other items. Some wood joints employ fasteners, bindings, or adhesives, while others use only wood elements. The characteristics of wooden joints – strength, flexibility, toughness, etc. – derive from the properties of the joining materials and from how they are used in the joints. Therefore, different joinery techniques are used to meet differing requirements. For example, the joinery used to build a house is different from that used to make puzzle toys, although some concepts overlap.

3159560583_53ec5b9f91

Traditional Joinery

Many traditional wood joinery techniques use the distinctive material properties of wood, often without resorting to mechanical fasteners or adhesives. While every culture in which pieces of wood are joined together to make furniture or structures has a joinery tradition, wood joinery techniques have been especially well documented and celebrated in the Chinese, European, and Japanese traditions. The Japanese and Chinese traditions in particular include hundreds of types of joints, many of which do not use glue or nails. The Chinese have been using this method for the last seven thousand years.

Pinejoin

Properties Of Wood

Many wood joinery techniques either depend upon or compensate for the fact that wood is anisotropic: its material properties are different along different dimensions.

Joining wood parts together must take this into account, otherwise the joint is destined to fail. Gluing boards with the grain running perpendicular to each other is often the reason for split boards, or broken joints. Furniture from the 18th century, while made by master craftsmen, did not take this into account. The result is this masterful work suffers from broken bracket feet, which was often attached with a glue block which ran perpendicular to the base pieces. The glue blocks were fastened with both glue and nails, resulting in unequal expansion and contraction between the pieces. This was also the cause of splitting of wide boards, which were commonly used during that period.

In modern woodworking it is even more critical, as heating and air conditioning cause major changes in the moisture content of the wood. All woodworking joints must take these changes into account, and allow for the resulting movement.

607px-Timber_Mortising_Machine

Strenght

Wood is stronger when stressed along the grain (longitudinally) than it is when stressed across the grain (radially and tangentially).

Timber_Joint_with_Metal_Plates.JPG

Dimensional Stability

Timber expands and contracts in response to humidity, usually much less so longitudinally than in the radial and tangential directions. As tracheophytes, trees havelignified tissues which transport resources such as water, minerals and photosynthetic products up and down the plant. While lumber from a harvested tree is no longer alive, these tissue still absorb and expel water causing swelling and shrinkage of the wood in kind with change in humidity. When the dimensional stability of the wood is paramount, quartersawn lumber is preferred because its grain pattern is consistent and thus reacts less to humidity.

3159551181_7b19ca4f50

Material Used For Joining

  • Joints can be designed to hold without the use of glue or fasteners.
  • Glue is highly effective for joining wood when both surfaces of the joint are edge grain. A properly glued joint may be as strong as a single piece of wood. However, glue is ineffective on end-grain surfaces. Compared to a mortise and tenon, a dowel joint is a poor joint because it does not address these properties. Much of the surface of the hole of a dowel joint is end-grain, to which glue adheres poorly. In a mortise and tenon, most of the surface of the joint is longitudinal-grain. Animal glue is soluble in water, producing joints that can be disassembled using steam to soften the glue.
  • Various mechanical fasteners are used, the simplest being nails and screws. Glue and fasteners can be added together.

Types of Joints

Some types of joints used include:

Woodworking-joint-butt-dowel

Joinery-cornerbridle

Woodworking-joint-butt-biscuit

Dado_joint

401px-Sagami_Temple_2600px

Source: http://en.wikipedia.org

============================================================================================

Dimensioning woodworking and carpentry joints

Today there are a lot of websites that offer pictures of  woodworking and carpentry joints, but usually they do not give advice about the dimensioning of various kinds of joints between the wooden parts. You can find some hints on various woodworking  and carpentry forums, but they are scattered among huge amounts of other posts and searching for it can get quite tiring. In cases when the wooden construction is not too loaded or when it has a little weight itself, the dimensioning is not so much important. But if you are dealing with big and expensive construction, damaging of which can cause injuries or great financial loss, the dimensioning of woodworking and carpentry joints is surely an important thing. On this page we have put the dimensioning of a few woodworking and carpentry joints. We will gradually update this page with the new material, and if you have some good advices about the joints or you have any suggestions, please let us know.

Mortise and tenon joints

Blind mortise and tenon joint

Blind_mortise_and_tenon_joint

mortten_large_blind

Double blind mortise and tenon joint

blind_double_mortise_and_tenon_joint

double1

Mortise and tenon joint

tenon_and_mortise_woodworking_joint

tenonbasicxx

Double mortise and tenon joint

double_tenon_and_mortise_woodworking_joint

Doubten

Stub mortise and tenon joint

dimensioning_stub_mortise_tenon_joint

2006_1028_122908.JPG

Blind stub mortise and tenon joint

dimensioning_blind_stub_mortise_tenon_joint

377px-MortiseCornerStubx

Haunched tenon and mortise joint

dimension_haunched_tenon_mortise_joint

haunchx

Blind haunched tenon and mortise joint

dimension_blind_haunched_tenon_mortise_joint

mortten_large_haunched


Don’t Worry ,Will be Updated soon! Stay on This blog…

Source: http://www.craftsmanspace.com

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: