Concrete Pressure On Formwork [work]: Ciria Report 108

The Gold Standard: An In-Depth Look at CIRIA Report 108 and Concrete Formwork Pressure

In the world of civil engineering and construction, few documents have achieved the status of a "silent standard" quite like CIRIA Report 108: Concrete Pressure on Formwork. Published in 1985 by the Construction Industry Research and Information Association (CIRIA), this report revolutionized how engineers calculate the lateral pressure exerted by fresh concrete on vertical formwork.

• ACI 347 (USA): The American model generally assumes the concrete remains fluid for a specific duration (e.g., based on the type of cement). It assumes the pressure is hydrostatic for the depth poured within that time window.
• CIRIA 108 (UK/International): The CIRIA model is generally considered more sophisticated regarding the rate of rise. It assumes that even while placing, the concrete is stiff

CIRIA Report 108 provides a detailed analysis of the factors influencing concrete pressure on formwork. Some of the key findings include: ciria report 108 concrete pressure on formwork

Understanding CIRIA Report 108: A Guide to Concrete Pressure on Formwork

CIRIA Report 108, formally titled Concrete Pressure on Formwork, is a foundational technical document published by the Construction Industry Research and Information Association (CIRIA). It has long served as an essential reference for formwork designers, engineers, and concrete contractors, particularly in the UK and Europe, helping them calculate the lateral pressure exerted by fresh concrete on vertical and near-vertical formwork. The Gold Standard: An In-Depth Look at CIRIA

This article provides a comprehensive breakdown of CIRIA Report 108—its history, key formulas, practical applications, and why it remains indispensable for safety and efficiency in concrete placement. ACI 347 (USA): The American model generally assumes