Ciria Report 108 Concrete Pressure On Formwork Jun 2026

The formula only applies up to the height where concrete begins to set. For very tall walls (e.g., 10 m), multiple lift pours are needed, as the lower concrete will have set before the top is placed.

CIRIA Report 108, "Concrete pressure on formwork," serves as a foundational guide for calculating the lateral pressure exerted by fresh concrete on temporary formwork structures, accounting for variables like rate of rise, temperature, and mix composition. It provides specific formulas to determine maximum pressure ( Pmaxcap P sub m a x end-sub ciria report 108 concrete pressure on formwork

An empirical model to predict fresh concrete lateral pressure The formula only applies up to the height

Even if the rate of rise is high, the pressure will not increase indefinitely. It levels off once the concrete at the bottom has stiffened enough to support the load of the concrete above it. It provides specific formulas to determine maximum pressure