Standards these tools do not replace
The calculators use textbook relationships. The standards below are where a design check actually lives. None of their text is reproduced here.
- BS EN ISO 19650 and the UK BIM Framework — information management. The file-name checker is a project convention, not the annex.
- BS EN 1992 and BS EN 1993 — concrete and steel section checks. Beam reactions stop at the moment.
- BS EN 1997 — geotechnical design. Pad pressure is average load over area only.
- BS 7671 — electrical installations. Voltage drop here is a resistivity estimate.
- BS 5975 — temporary-works procedure. This site cannot appoint a coordinator.
- CIRIA C766 — formwork pressure. The tool is the hydrostatic upper bound only.
- DMRB, sewer-adoption guidance and FEH — infrastructure drainage. Rational runoff is a screen.
Buy the standard or use the publisher’s official guidance before a figure leaves the site. Last checked 3 October 2026.
How to use the figure in a review
Quote the inputs with the result. A pad pressure without the load and the area cannot be reviewed. A peak flow without the coefficient, the intensity and the area cannot be reviewed. A gear ratio without the tooth counts cannot be reviewed. The page is the screen. The project document is the limit.
Do not paste the result into a published container as design information. Published means the project state, not this site. A preliminary number stays preliminary until the appointed party issues it under the appointment.
Last checked 3 October 2026. Original guidance. Standards text stays with the publisher.