The Chair – Fitting the Front and Rear Stretchers (Part 1)
At the end of todays’ session in the workshop I really feel as though I have dodged a bullet.
When I started on the mortice and tenons, I reasoned that the straight stretchers of the chair would be a better place to start – partly because the stepped tenons were difficult enough, and partly because the angles of the front and rear stretchers were daunting. I lacked confidence in my own measurements - gauging the angles accurately, I reasoned, would be easier in situ.
In retrospect, I should have fitted the front and rear stretchers first. It would then have been much, much easier to do so then than now … which is the task that now faces me.
It is a little bit of a roundabout route, however I did have a cunning plan to solve the problem, to quote Baldrick.
What is needed is a jig to hold the sides at the correct angle, and then position the front and rear stretchers between them.
The first step was to build a seat out of blue tape …
Onto this went a layer of paper …
Which became a template to create a thin (flexible) MDF version …
This positioned the mortices.
The second jig started as four holes drilled into a MDF board. These marked the position of the feet of the original chair …
Here the sides are set in the holes and bridged by the MDF seat …
Holding the legs at the correct angle was managed by hot-gluing MDF angle supports, which were measured from the original chair.
And now we have something that resembles a chair!
Finally, the shoulder angles of the front and rear stretchers could be checked for accuracy.
It turned out that the vertical shoulder angles were fine. The end (horizontal) shoulder angles were a little off line, however, and need to be adjusted.
All this was worth the effort to get this right before any work is done.
Regards from Perth
Derek
January 2014