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Back in March of 1988 I was in charge of the team that designed the P-100 paint robot. Dave was my boss. In the following picture I am on the left and Dave is on the right.
1. Dave and I
Last week Dave called me for help removing the 4” square concrete-filled pole that used to support the basketball backboard, in preparation for moving. He had an old Craftsman 4-1/2” angle grinder but it could only accommodate the cupped (type 27) grinding wheels and cut-off wheels, not the straight ones. He tried to purchase a cupped cut-off wheel at the hardware store but they only had the straight ones. Eventually he was able to cut off the top 6’ of the pole using a Sawzall with blade that had carbide grit and another blade that was carbide tipped. Below is a picture of the pole that remained after Dave cut off the top with the Sawzall.
2. Pole
Below is a picture of the cut that Dave made with the Sawzall.
3. Dave's cut
Unfortunately, it was taking Dave too long and he had a whole list of things to get done before the moving van came in four days, so I came over to help him to remove the remaining pole. The pole was on a slight hill as shown below.
4. Pole on slight hill
I used a chisel to cut into the frozen ground, so that the cut would be below ground and level. I used a 6” abrasive cut off wheel on my Metabo grinder. I cut the square tube off about ¾” above the bottom of the hole that I chiseled out from the frozen ground. I hit the pole at shoulder level with a sledge hammer and the concrete in the pole broke off about ¾’ below my cut in the tube. I used my hammer drill with a chisel to level off the concrete in the tube.
5. Leveling off concrete
1. Dave and I
Last week Dave called me for help removing the 4” square concrete-filled pole that used to support the basketball backboard, in preparation for moving. He had an old Craftsman 4-1/2” angle grinder but it could only accommodate the cupped (type 27) grinding wheels and cut-off wheels, not the straight ones. He tried to purchase a cupped cut-off wheel at the hardware store but they only had the straight ones. Eventually he was able to cut off the top 6’ of the pole using a Sawzall with blade that had carbide grit and another blade that was carbide tipped. Below is a picture of the pole that remained after Dave cut off the top with the Sawzall.
2. Pole
Below is a picture of the cut that Dave made with the Sawzall.
3. Dave's cut
Unfortunately, it was taking Dave too long and he had a whole list of things to get done before the moving van came in four days, so I came over to help him to remove the remaining pole. The pole was on a slight hill as shown below.
4. Pole on slight hill
I used a chisel to cut into the frozen ground, so that the cut would be below ground and level. I used a 6” abrasive cut off wheel on my Metabo grinder. I cut the square tube off about ¾” above the bottom of the hole that I chiseled out from the frozen ground. I hit the pole at shoulder level with a sledge hammer and the concrete in the pole broke off about ¾’ below my cut in the tube. I used my hammer drill with a chisel to level off the concrete in the tube.
5. Leveling off concrete
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