Once upon a time there were plenty of square pegs jammed into round holes, but those dark times have passed. Now there is a special shape that allows people to drill square holes. This special ...
There are three tool options to consider when drilling large-diameter holes in thick steel: twist drill bits, hole saws and annular cutters. 1. Twist drill bits. Especially in steel thicker than ¼", ...
SAN FRANCISCO — Defects that occurred during fabrication, along with holes cut into the steel, are likely what caused two structural steel beams to crack just six weeks after the $2.2 billion ...
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