If the form height is 3 m, full hydrostatic would be 72 kN/m². The CIRIA method allows a far lighter formwork system, saving material and labor.
Applying CIRIA 108, they measured the setting time (E) of the site mix (a high-density concrete with PFA) at 3.5 hours and controlled the rate of rise (R) to 1.2 m/hour. The resulting P_max was just 120 kN/m². ciria report 108 concrete pressure on formwork
By trusting the CIRIA 108 calculation, they saved over £2 million in formwork costs and completed the walls safely and on schedule. If the form height is 3 m, full
The report’s most influential contribution is the formula for maximum lateral pressure (P_max) at the base of a vertical form: ciria report 108 concrete pressure on formwork