04-18-2011, 10:52 PM
The reason for that is that the rounded corners will be up in the air, not laying flat against our base metal. The corners don't need to be rounded, but I figured that it would be best to minimize any sharp edges on something that would be grabbed hastily...
Next, I drilled 2 1/4" holes in the plates. One hole is closer to the edge than the other side. The one that is closer to the edge will have a welded pin in it. I drilled 4 plates at once (the ones for the base) and then I drilled the remaining 2 that would have the fire extinguisher attached to it. The holes were located not directly in the middle of the 1" flat, but at about 5/8" away from the mounting area. This adds some height to the overall stack of metal and gives some added clearance. Can't really describe it, but follow the pics. The holes were about 4-1/8" center to center, with the hole with the removable pin being centered 1/2" off the edge of the plates.
Next, I drilled 2 1/4" holes in the plates. One hole is closer to the edge than the other side. The one that is closer to the edge will have a welded pin in it. I drilled 4 plates at once (the ones for the base) and then I drilled the remaining 2 that would have the fire extinguisher attached to it. The holes were located not directly in the middle of the 1" flat, but at about 5/8" away from the mounting area. This adds some height to the overall stack of metal and gives some added clearance. Can't really describe it, but follow the pics. The holes were about 4-1/8" center to center, with the hole with the removable pin being centered 1/2" off the edge of the plates.