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GCSE Resistant Materials - joints and fittings
Transcript of GCSE Resistant Materials - joints and fittings
Hinges part 2
Thanks for watching.
Joints for wood part 2
Hinges part 1
Hinges and how to use them.
There are many different types of hinge in the GCSE coursework and each has a unique and interesting use. This following slides will show you all the different types of hinge you will need to know for your GCSEs. If you feel that a certain hinge is missing or you feel that one of the explanations is wrong feel free to leave a comment.
Joints for wood.
Wood can be joined in many ways from dovetail joints to just plain gluing it together. The type of joint used is determined by the requirements, for example a dovetail joint would be used for a jewelery box, but would be too difficult and time consuming to use for the sides of a workbench. Some joints are very strong, some look good and some are very quick and you will need to know which is which for your GCSEs.
1.a) Identify this joint.
1.b) Where is this joint used?
Joints for wood part 1
1.a) Halved joint (1)
b) roof beams (1)
2. No recess is required. (1)
3. Desk lid. (1)
4. Glue/ dowel/ biscuit. (1)
5. Concealed or hidden hinge. (1)
6. Basically anywhere where strength is needed. e.g. a table or a shelf. (1)
7.Hinges; butt, butterfly, flush, piano, concealed or hidden. (3)
Joints; Miter, Dowel, butt, finger, bridle, tongue and groove, mortise and tenon, halved. (4)
Butt hinges are very strong but cannot be adjusted once fittted. Butt hinges requie a recess to be cut if they are to close properly. Butt hinges are most commonly used in doors
Butterfly hinges are used in lightweight doors because they are not as strong as butt hinges. Butterfly hinges come in a variety of shapes and are easy to fit
Flush hinges are useful because they do not need a recess to be cut. on the other hand they are no as strong as butt hinges so are used for lighter doors
Brass or steel?
Brass hinges look better but steel hinges are cheaper so brass hinges are used where they are visible, steel when they are not.
Hidden or concealed hinge.
Hidden or concealed hinges are designed for MDF or chipboard and are used for cupboard doors. they are adjustable and cannot be seen when the door is closed
Continuous or piano hinge
Continuous or piano hinges are used where a long hinge is needed, for example a desk lid or the top of a piano. They are screwed in using countersink screws
Butt joints are weak but quick to make
Miter joints are like butt joints but they do not show any end grain.
Tongue and groove joints are used to join shelves to the cupboard as well
Bridle joints are strong but can be lifted out if not glued in place.
Dowel joints are strong and are used in some furniture.
Finger joints are very strong but are difficult to make.
Mortise and tenon joints are strong because the tenon fits snugly into the mortise. the mortise can be cut using a mortise machine (surprisingly)
Halved joints are designed to hold beams together and are used in some roof beams.
Joints can be strengthened using glue or by using a dowel between the two pieces of wood!
2. what is the advantage of a flush hinge?
3. Name 1 location, other than a piano, where you would find a piano hinge.
4. Name 1 way to strengthen a joint.
5. which hinge is designed for use with MDF or chipboard?
6. When would you not use a butt joint? (be specific)
7.Name 3 hinges and 4 joints.
0-5 Poor effort. Were you listening at all?
6-10 Good. Make sure you know this in time for the exam though.
11-14 Great work, you know this.
As a present, here is a proper exam style question.
This is a bookshelf. Name two joints used and explain why those joints were chosen. 
ANSWER TO EXAM QUESTION
Tongue and groove joint, to make the shelves strong and removable. Miter/butt/dowel joint, to hold the sides onto the base.
Easy. just 2 short sentences, 4 cheap marks. If you lose these you'll kick yourself.