When I cut down this Alder tree, I cut the trunk into roughly four foot lengths. I decided to roughly square up the logs so they would be easier to store and move around. I used one of the offcuts, and shorter logs from higher up the tree, to build a simple log bench.
I had not planned to make this bench, so I did not have my camcorder set up when I initially made it. This meant I had to take it apart and rebuild it so I could make this video. It doesn't show the steps of flattening each side of the smaller logs or the underside of the seat, but I think you'll get the idea. The Alder wood turns a bright red shortly after it is cut. But it weathers to a dark brown or grey after a few weeks.