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Butt Joints and Mitre Joints

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Daniel Wood

on 26 April 2014

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Transcript of Butt Joints and Mitre Joints

Wood Joints
Mitre Joints
Butt Joints
The Mitre Joint is a joint formed by the meeting of two pieces in a corner.
They are always cut to 45 degrees in a mitre box so that it will form a 90 degree corner when joined.
1. Marking the joint
Use a sliding bevel set to 45 degrees and mark a line using a pencil to show where you are going to cut.

2. Cutting the Mitre
You can use a tenon saw to cut the joints. You can use a mitre box to guide the saw when cutting 45 degrees, or you can use a clamp to keep it in place while cutting it.

3. Joining Mitre Joints
Once you have cut the joints, you can glue them together. The joints may slip, so you have to be careful. To make the joints even stronger, you can use spikes or pins so it won't be as easy for it to break.
Advantages and Disadvantages
It hides end grains
It is handy for making items such as furniture and picture frames.
The joint is very weak.
Assembling and gluing the joints together can be irritating - the joints can easily slide over one another, so it is hard to keep it still.
Butt joints are the easiest joint of all to make. The wood is butted face to edge, or end to edge, and nailed - screwed or dowelled together.
1. Measure and mark out how much wood you need, and cut it, (you can use tenon saws)

2. When you have cut your piece of wood that you are going to join together, secure one in a vice or a clamp. (Make sure it is tight so that the wood won't slip!)

Advantages and Disadvantages
Mitred joints don't always have to be squares - they can be octagonally shaped (each of the angle will be 45 degrees) or hexagonally shaped.
It is the most easiest joint to make since it is just cutting pieces of wood and glueing them together.
It is quick to make - it doesn't take alot of time compared to other complicated joints.
It has a uniform surface, so it is often used in things where appearances is important.
They are very weak.
Defects such as cracks can easily appear.
It is very difficult to butt very thin materials because it is hard to align the faces properly.
The mitre can also be strengthened by fitting a spline or tongue
3. Apply some glue on the top part of the wood, then place the second piece on top of the first, making sure to line up the edges. (You can hammer in some nails or screws to secure the joint)

Butt joints can be strengthened by fitting blocks of timber.
They are usually either triagular or square.
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