Week two of the Shelter Series was dimensional timber framing with Bill Sturm from Oregon Timberworks. Although the calculations and design of the structure were already figured, it was completely constructed by students. First, we were taught how to layout tenons, mortises, and knee braces. We used both hand and power tools to saw the pieces. Once they were checked by Bill, they were ready for fit up. We made sure everything fit at the shop before bringing the pieces to site. The timber raising was a community event where each person could write a message on a peg and drive it in.
Round pole framing is similar to dimensional framing in that you picture the “square in the round.” First, make sure you have a smooth top and bottom to mark. Next, find the middle by measuring the horizontal and vertical and marking the halfway point. A square will be marked depending on the width of your notch. For instance, if you want a 4 “ notch, then you will need a 4” square in the center of your round. So, you would measure from the middle 2 “ up and 2” down. Use a level to draw a straight line. Grab a partner to run a chalk line from each edge point. Using a framing square and the chalk line as a reference connect the chalk lines in the dimension of the notch. For example, if it is a 4“ wide notch and 5” long notch, you would mark the 5’“ length here. “Breadslices” are a term used in woodworking for making several cuts to make chisel work easier. Once the notch is clean and level it is ready for raising!
These round poles were used as roof rafters. On top of the round poles are 1” cedar planks, insulation, tar paper, and metal roofing.