Tree felling contest at the 1941 Tillamook County Fair, in Oregon
This technique was used to fell larger trees, since near the base there would have been so much pitch that cutting through was difficult. Instead lumberjacks built scaffolds to ten or twenty feet up. Then they would make notches and insert springboards, like you see here, to stand on while they sawed through. Higher in the trunks there was less pitch, and it was easier to saw through and fell the tree.