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Control of cracking caused by restrained deformation in concrete (includes errata February and March 2019)

Publication C766

CIRIA, 2018
Control of cracking caused by restrained deformation in concrete (includes errata February and March 2019)

Document Status

Withdrawn, Document not available for download


Civil & Structural Supplement




This third edition guidance document continues to look at the causes, effects, and risks of cracking in concrete. It occurs when tensile strain is greater than the tensile strain capacity of concrete. Considers design aspects such as estimating the magnitude of crack-inducing strain, how to control the size of cracks using reinforcement and ways to minimise risk. First published in 1992 as CIRIA R91 and updated in 2007 as C660 to take into account design to Eurocodes, this 3rd edition provides further clarity for design relating to BS EN 1992-3.


Bamforth, P.


The accompanying spreadsheets are available from CIRIA customer services: Supersedes C660 Early-age thermal crack control in concrete. 2014 reprint (CIRIA, 2007). First published as CIRIA Report R 91, Early-age thermal crack control in concrete (revised edition), 1992. Based on RP722. Errata issued February 2019 for Page 42, .4.3 reference should be Figure 4.10. Errata issued 25 March 2019, a table with replacement information for pages 5, 38, 41, and 42. Also details corrections for the spreadsheets.




Publisher History

CIRIA was formerly known as the Construction Industry Research and Information Association. They are a member-based research and information organisation who publish reports and technical papers covering building and civil engineering as well as transport and utilities infrastructure.



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