WOODWORKING: JOINERY

1. WOODWORKING: JOINERY

2. Joinery • What is joinery? • In our case – we will be looking at the fastening or combining of two or more boards together when building our projects. • It is important to have good, strong joints when building furniture. • It is sometimes good to use both advanced joinery methods and fasteners when assembling the project.

3. Butt Joints • Used to join 2 boards • Edge to edge • End to side • End to edge • Very simple form of joinery

4. Dado Joints • Slot or groove is cut across the width of a board (on the inside) when joining 2 boards together • Boards are joined at right angles to one another • Remove a portion from one board to accept the other board (usually half the thickness of your material)

5. Rabbet Joints • Similar to a dado joint • Remove material from the end or edge of a board • Makes the boards connect at a right angle to one another

6. Spline Joints • The spline is the strip of wood used in the center of this joint. • The spline is inserted into matching grooves/troughs on two boards. • Splines are often used to reinforce miter or butt joints. • Spline can also help align the pieces for the glue-up procedure. • You can also use a spline joint as a decorative accent in your project.

7. Mitre Joints • The division, into 2 equal parts, of an overall angle created by 2 intersecting parts • Most frames that use miter joints meet at 90˚ so the two pieces are cut at 45˚ • Precise cuts are very important – you will see gaps and have a less secure joint if your cuts are not accurate

8. Lap Joints (ie. end-lap, half-lap) • Remove the full width of the intersecting wood pieces. • The two parts meet and together make up the entire thickness. • Should be used with fasteners as well in order to increase the strength of the joint.

9. Tongue-And-Groove Joints • A short tongue is cut along one edge. • A matching groove is cut along the edge of the other board. • Good to use when making a wider panel from narrow boards.

10. Box Joints • Cut straight slots and grooves out of the end of two boards in order to form an interlocking system at the corners. • Sometimes referred to as a finger joint. • Used for decorative reasons as well as to strengthen the assembly.

11. Mortise-and-Tenon Joints • Join two pieces of wood at an angle (usually 90˚) • A tenon (a portion that sticks out) is cut on the end of one board. • A matching recess, slot or hole is cut into the other piece (mortise). • The two fit together to make a strong joint that is frequently used in furniture making.

12. Dovetail Joints • A system of pins and tails that interlock together. • Tails are the triangular shape cut through the thickness of a board. • Pins are more slender portions cut along the grain of the other board. • One of the strongest joints. • Also very attractive for of joinery.

13. Dowel Joints • Cylindrical piece of wood used to join two pieces of wood together. • Holes are drilled into both pieces of wood at precise locations. • The dowel (cylindrical piece) fits into the hole on either side. • Makes a butt joint more secure.

14. Biscuit Joint • Thin football shaped disk is used to join two boards together. • A slot is cut into each board. • The biscuit fits halfway into each side of the slot. • The biscuit expands with the glue to fill the gap.

15. Fasteners What are the different types of fasteners?

16. Your task…. • Define the term fastener as it would be used in the woodshop. • Choose 3-4 specific types of fasteners (ie. Glue, nails, screws, tape, etc.) and describe its benefits. • For example – Robertson screw, Gorilla Glue, and roofing nails • Why would we use waterproof glue over regular wood glue. • Why do some nails have “twists” along the shank? • Do not write a novel – but make sure you have enough information about each. • If you would prefer to do a PowerPoint over a Word document – then do so!