The most dangerous tool (part 2)
Thursday, September 25th, 2008One day, some years ago, when I was building houses, we were assembling a large timber truss. It was a “sandwich” with 2x10s on the outsides and 4x6s in between. At each lap there was a blot with a 6″ shear ring. The cutter for the shear ring slot looked like a giant hole saw. We were driving it with big hand held drill that spun at about 20 rpm but with enough torque to pull a house over. (more…)