The last matter to deal with on this project is the fitting of the sacrificial cap. I managed to obtain a nice piece of vertical grain Fir from the architectural millwork shop down the street, for $6. Price was right! I wanted something a bit softer than the Canarywood, a material that would not be too slippery in surface quality, and the Fir fit the bill perfectly.
I made up a MDF jig to rough out the sliding dovetail mortises, of which there are 6 in total to be cut in the top and cap:
Next, I started cutting the trench for the locking pin:
For the near term, I’ll leave the fixing pin a bit long, and then run it in and out a few times before trimming it flush at some future point. The cap is also slightly proud of the beam to act as a bit of a bumper to keep the beam underneath it in better shape longer (I hope).
All in all it came out well, though not all the fits are as nice as I would like them due to an error in the glue-up process. The main point was to learn a layout method which would apply to roof carpentry, and in that respect it has been a very worthwhile undertaking. The sawhorse should last a while – I wonder how much weight it can take? I won’t be doing any destruction testing though, hah-hah!
Thanks for dropping by today. I wonder what I’ll find to write about next time?