Concrete & Masonry

Bar numbers, diameters, areas, weights per foot and how to read the marks rolled into the steel.

How compressive strength is specified, tested and accepted — and what psi does not tell you.

About two tons, and here is the density range that decides where in that spread you land.

Published yields for every common bag size, bags per cubic yard, coverage by thickness — and the three products whose numbers are not what you expect.

A chart by post size and hole depth, the math behind it, and the hole rule the bag manufacturers actually publish.