About

An independent publication about limits

Every built thing has a line — the load a beam takes before it yields, the pressure a vessel is rated to, the margin an engineer designs in. This publication is about how those limits are established, how they are tested, and what happens in the gap between the number on the drawing and the thing in the world.

The whole site is one stress–strain curve. Each section owns a region of it, every article is a numbered reading plotted at its point, and the red dashed line marking yield runs across everything as the single constant.

No dates are printed; the record is evergreen. Real failures are discussed soberly, for what they changed in practice. An independent publication about limits, testing and safety margins. Not engineering advice, not a standard, and not a substitute for a qualified engineer.