The four sides of the frame are cut to the desired length, with the ends cut at a 45 degree angle.
Before placing two edges into a right-angle/corner clamp, wood glue is applied to one of the ends. The two sides are pushed together to form the corner and clamped in place.
In order to make sure your screws are evenly placed, mark out where they will go. They should be placed so that they will go through the first piece of wood and into the second.
Use a small drill bit to, drill a hole the entire length of the screw (this should go though both pieces of wood). The use a larger drill bit to increase the size of the hole in the first piece of wood (not going into the second).
Insert two screws long enough that both ends of wood are securely fastened together to form the corner of the canvas stretcher.
Repeat this process on the remaining three corners.
Next, use a length of quadrant to create a bevelled edge around your frame. Measure one side of your frame. Cut the length of the quadrant at a 45 degree angle (making sure the angle is going the right way).
Apply wood glue to the edge of the frame, stick on the quadrant and hold in place with some masking tape. The use tacks to secure it in place, then remove masking tape.
Repeat the measuring, cutting and sticking process on each side of the stretcher. It is better to measure each side as you go, rather than all in one go at the stat. This ensures a closer more accurate fit.
Now prepare the canvas…