A reference publication on factory built housing, planning, structure, the building envelope and the systems inside. Every figure traces back to the document it came from.
What this is
Every page is a sheet. It carries a code, a revision date and a count of the sources it rests on, and each of those sources is named at the foot of the page with the date it was read. Where something is not established, the page says so and describes what would settle it. No cost figure here is a quote, and nothing on these pages is sold to you.
Contents
Modular, panelised, kit and container housing, and what changes when the work moves indoors.
Why believe any of it
Every figure on this site traces back to the document it came from.
Sources are stored as records rather than typed into sentences, so a number and its source cannot drift apart. A document that could not actually be read is never cited. The method is set out in full on the standards sheet.
Journal
The same change, made three months apart, is two different transactions and only one of them is priced honestly.
Most residential schedules are presented as a sequence of dates. The useful information is in what depends on what.
There is no American building code. There is a model, and a few thousand separate decisions about whether to use it.
The answer was written down in 1976 by government auditors, and the federal statistics have been confirming it ever since.