# Machinae Build > Describe a steel building in plain English and see it in 3D in about a minute, with the US > code requirements that apply to it. Machinae Build covers shops, warehouses, hangars, barns, > riding arenas and storage across the United States, in tube steel, cold-formed steel and > red-iron PEMB. It is a design and a code check, not a set of permit drawings: every building > still needs a licensed engineer's stamp for its county, and the site loads are never guessed. Sizes are in feet. A description like "60x100 shop with two 14 ft roll-up doors, 16 ft eave, in Austin TX" is enough to get a building back. Five designs are free without an account and ten more after signing up; there is nothing to install and no card is asked for. Every design carries a deterministic code check against a fixed rule set drawn from the IBC, AISI and IECC — not a model's opinion. The check states the standard it cites, says plainly when a span needs a different structural system than the one asked for, and asks for the build site rather than inventing a ground snow or design wind value for it. ## Product - [What it is and how it works](https://machinaebuild.com/): the front page — what you type, what you get back, and the code checks that come with it - [Questions and answers](https://machinaebuild.com/faq): direct answers to what it is, what it costs, which spans and building types it handles, what the code check covers, what data is collected, and what it will never replace. Each answer opens with the answer; the plain-Markdown copy is at https://machinaebuild.com/faq.md - [How to use it](https://machinaebuild.com/help): a step-by-step walkthrough written for somebody who does not use computers much. Says what to type, what each control does, and what everything costs in free designs - [The designer itself](https://machinaebuild.com/app): the configurator. Requires a browser with WebGL; not useful to a crawler ## What the code check covers - [How to use it — the code check section](https://machinaebuild.com/help): what "cannot build", "required" and "recommended" mean on a design, and why the build site is asked for Structural systems are routed from the clear span and eave height rather than chosen by the buyer: tube steel for short spans, cold-formed steel in the middle, red-iron PEMB (rigid frame) above roughly 70 ft of clear span. Selling a wide span as light-gauge is the specific mis-sale the router exists to prevent. ## Terms and data - [Terms of Service](https://machinaebuild.com/terms): what the designs and code checks are and are not. Section 3 states plainly that this is not a substitute for a licensed engineer - [Privacy Policy](https://machinaebuild.com/privacy): what is collected, why, how long it is kept, and how to have it deleted - [Cookies](https://machinaebuild.com/cookies): the two cookies the site needs, and the one optional lookup it asks permission for - [Contact](https://machinaebuild.com/contact): how to reach us about a quote, an account, a privacy request or a security issue ## Optional - [Sitemap](https://machinaebuild.com/sitemap.xml) - [Crawler policy](https://machinaebuild.com/robots.txt): retrieval bots and training crawlers are both allowed; the API and the configurator are not crawled