Ciria Report 108 Concrete Pressure On Formwork _hot_ Site

Report 108 provides a rational method to answer this, moving beyond simple hydrostatic assumptions (which overestimate pressure) to a more economical, performance-based approach.

Where:

The section size and shape influence the "archig action" or friction between the concrete and the form face. The report uses the minimum core dimension ( ) or a size factor ( C2cap C sub 2 ) to account for this. ciria report 108 concrete pressure on formwork

Introduced precise mathematical limits based on rising rate ( 5. Modern Status: From 108 to Guide CS030

In the world of construction, few forces are as misunderstood—or as dangerous—as fresh concrete pressure on formwork. Every year, projects face blowouts, bulging forms, and even catastrophic failures because engineers and contractors underestimate the liquid-like pressure exerted by newly placed concrete. For decades, the industry struggled with inconsistent guidelines until a groundbreaking document changed everything: Report 108 provides a rational method to answer

The expected and minimum ambient temperature on site

While CIRIA Report 108 remains a highly respected and widely cited text, temporary works design has continued to evolve. In the UK and Europe, the principles of CIRIA 108 were largely integrated and updated into (Code of practice for temporary works procedures and the permissible stress design of falsework) and later revisions like CIRIA Report R108 equivalents found in modern safe-guides. Introduced precise mathematical limits based on rising rate

The standard simplified equation for the maximum concrete pressure is often expressed as: