|Forum topic by MisterCat||posted 06-02-2010 07:02 AM||1715 views||0 times favorited||6 replies|
06-02-2010 07:02 AM
Over the weekend I wanted to make some simple stands for holding up a sheet of plywood so that I could attach straight edges and do a decent job making cuts to the whole sheet. I’d seen a picture of some stands that seemed like a good idea. The two vertical stands are braced from behind by another 2×4 which are clamped to my work-bench. To keep the plywood from wanting to tip, I decided to design the stands to lean back at 15 degrees
It’s the connection between the braces and the stands that lead to an interesting design problem. I originally had envisioned a sliding dovetail connection, however with the braces and stands not meeting at a 90 degree angle, I couldn’t figure out a way to cut the joint.
After working for a while to try and come up with a design, here’s what I came up with.
The drawing shows the side view: The horizontal member is the brace that gets clamped to the work bench, the board that comes down at 75 degrees is the board the plywood will sit against, and the left hand edge must be free of metal. The blue hatch shows the area to be removed from the stand (that’s the easy one). The red outline shows the original shape of the brace.
The only hard part is cutting the little wedge out where I’ve marked ‘problem area’ Normally this would be pretty easy to notch out on a band saw, but I only have a table saw. I ended up cutting it with a handsaw, and my first attempt was horrible (getting the saw to accurately grab at a 15 degree angle is hard), the 2nd one was better when I clamped on guide block. Neither was a resounding success.
Can anyone offer a better/easier design for this short of joint? One of the challenges is that I want to keep it so that the joint can be knocked down for storage.