Temporary works stay with a coordinator
BS 5975 describes a procedure: a temporary-works coordinator, a design brief, a design check, and a permit to load or strike. A website cannot appoint that person. The formwork tool here is only the hydrostatic upper bound, unit weight times height of fluid concrete.
Worked bound
25 kN/m³ over 3 m is 75 kN/m². CIRIA C766 will often give a lower design pressure because pour rate and temperature limit how fluid the concrete remains. Using 75 kN/m² as a design pressure can overstate the load. Using it as permission to omit the design is worse.
Excavation volume on this site is a prism. Batter, trench support and a striking time are not in it. Those belong in the temporary-works design, not in a browser field.
Tools: hydrostatic formwork pressure, earthworks volume.
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.