With the help of dry-cutting, air-powered saws, construction workers from Raymond International Builders were able to keep a large pile driving project on schedule. The precast, prestressed six-strand piles were 14 inches square. After each pile was driven, workers had to saw off the top to the correct elevation. The project had to continue through the winter. It required a saw that was fast, easy to handle and maintain, and able to work in cold temperatures.
The air-powered saw uses an 80-cubic-foot-per-minute air compressor hooked up to a 3/4-inch air hose. The only maintenance required is to keep the saw's automatic oiler filled for lubrication. The manufacturer claims its air-powered saws last at least 4 times longer than gas-powered saws. The air-powered saws had another feature important to this project--their ability to cut dry. Wet cutting prolongs blade life by keeping the blade cool. But to use wet cutting, the contractor would have had to delay pile cutting until spring or build heated enclosures to keep blade cooling water from freezing.