06-30-2009, 11:07 AM
The cordless drill won't cut it. I've tried. The rock is prone to hang and grab and you'll break a lot of bits and waste a lot of time doing something that isn't going to work very well. Actually, the big rotohammer as Rob describes is miserable to use, but a strong guy can put in 500 feet of posts in a day, so it's not an insurmountable project. He'll earn his beer, though. Ironically, the flatter and more pahoehoe you've got the easier the job. Setting posts in rugget a'a and up and down broken ground is a lot worse. The big hammers cut fast. About 4 minutes to a hole.
You can, however, nail to lava. You use a 1/8 inch masonry bit, and duplex nails. Drill a hole, stick a piece of rebar wire in the hole, and pound in the nail. Don't bother trying to pull it if you've done it right. It's an interesting trick that may well be of use to someone.
You can, however, nail to lava. You use a 1/8 inch masonry bit, and duplex nails. Drill a hole, stick a piece of rebar wire in the hole, and pound in the nail. Don't bother trying to pull it if you've done it right. It's an interesting trick that may well be of use to someone.