Ciria Report 108 Concrete Pressure On Formwork Best May 2026

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

References

• CIRIA Report 108: Concrete Pressure on Formwork (2017)
• Construction Industry Research and Information Association (CIRIA)
• British Standards Institution (BSI) - BS 8533-1:2017

The report provides graphs and empirical relationships to determine this transition depth, typically 1–2 meters for ordinary concrete. Below the setting height, pressure is essentially constant. ciria report 108 concrete pressure on formwork

Actionable tip: Control R by limiting concrete delivery trucks or adjusting pump speed. CIRIA Report 108, "Concrete pressure on formwork," serves

Published by the Construction Industry Research and Information Association (CIRIA), Report 108 fundamentally changed how the industry calculates the lateral pressure exerted by fresh concrete. Even with the advent of Self-Compacting Concrete (SCC) and modern admixtures, the principles laid out in this 1985 report remain the industry benchmark. CIRIA Report 108: Concrete Pressure on Formwork (2017)