ChuckCoffer wrote:
Well,Gordon,I've never used a jig,but I can probably save you a little grief.
I think the easiest thing you could do with one of those is to clamp together enough stuff to cover a tread and then drop the jig on top of your dry run. I would do it over a piece of 3/4in plywood so that you can stick a piece of stairnose on the end of your dry run. Seems to me that you could then,simply drop the jig on top of it and trace it.
Of course,you would need to meaure the distance from the stairnose to the riser and position the jig accordingly.
Thanks Chuck. I understand the part of about clamping and tracing. It's the actual measuring part that had me stumped. I called the supplier I bought the tool from and they were able to put me in contact with someone who could explain how to use the tool.
Basically the tool is a sliding steal bar with two aluminum "flippers" attached to each end, like any other stair guage. The flippers are squared at one end and pointed at the other. The bar has a spring that you can use to put tension on the flippers. You can see a picture of the tool at this site:
http://www.woodwise.com/tools/jig.html .
Based on my discussion with the supplier and some experimentation, my understanding is that you follow this procedure:
1) Place the tool on the tread with the square ends of the flippers pointed toward the riser and the pointed ends out toward the front of the step.
2- Loosen the wing nuts that secure the flippers and slide the bar out to push the flippers flush to the skirt on boths sides of the tread.
3- Before tightening the knob that secures the sliding bar, push a little more to put the bar's spring tension on the flippers.
4- Tighten knob that secures the bar
5- After confirming that the flippers are flush with the skirt on each side, tighten the wing nuts that secure the flippers.
6- Loosen the knob on the bar to relieve the spring tension and then retighten knob to secure the bar (this establishes the width of the tread).
7- Use a bit of tape on each flipper to mark the front of the tread. (Makeshift, I know, but I can't think of another way to do this).
8- To prevent scratching the skirts, you can use the bar's spring tension in the other direction to push the bar inward as you lift the tool off the tread.
Now you have the correct measurement for the back, front, and sides of the tread.
If anyone who has used this tool follows a different procedure, please let me know.