May 30, 2003: Installing the Sheer Clamp - At the end of the last journal entry I had planned to finish installing the bulkheads. After looking at the hull I realized that there was a distinct possibility that the 3/4 inch bulkheads could make the 3/8 inch planking start to waiver and I decided to install the sheer clamp. I bought four 10 foot lengths of 1 1/2 X 3/4 inch douglas fir at Home Depot and scarfed them together to make two 19 foot lengths. Next, Roger and I used my planner to bring the 3/4 inch thickness down to about a 5/8 inch thickness. During the planning process we did a couple of trial clamps to make sure that the piece would bend around the top of the hull.
|We mixed up a pot of two-part epoxy glue and started buttering up the sheer clamp. (Note the shavings on the ground from the planning process.)||As I put the glue on, Roger followed with paper towels and took the glue off the sides of the piece. We also applied glue to the hull.|
|This is my "clamping kit". It consists of a bunch of 3" clamps and thin blocks of wood to put on the outside of the sheer clamp and the inside of the hull. The wood blocks keep the clamps from damaging the hull. Do not buy 2" clamps - they're not strong enough to do the job!||I screwed the sheer clamp to the end of the hull near the transom with one deck screw and started to move towards the bow, putting a clamp about every 8 inches. Roger raised and lowered the sheer to keep it aligned with the top of the planking.|
The completed clamping process.
We waited a day and did the same thing to the other side. One of the most important things to remember about this process is to take paper towels and remove all of the excess glue from under the sheer clamp. A few minutes of wiping will save hours of sanding.
The next job will be to finish the installation of the bulkheads.