pinner

Isaac Kremer/ November 23, 2025/ / 0 comments

In masonry construction, a small stone used to prop up a larger stone. The process involved (a most objectionable one) is termed “Pinning-up” or “Underpinning.” It causes the pressure on the block to be thrown on a few points instead of being equally distributed over it, and exposes the stone to cracking. (Bridge, 2019)