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Design tensile strength of lightweight aggregated concrete: the coefficient αlct

Eurocode 2 part 1-1: Design of concrete structures   11.3.5 (2)P

The value of the design tensile strength is defined as:

flctd = αlct flctk / γC (11.3.16)


is the partial safety factor for concrete, see § (1), § (2) and § (3)
is a coefficient according to § 3.1.6 (2)P (the coefficient taking account of long term effects on the tensile strength and of unfavourable effects, resulting from the way the load is applied).


The recommended value of αlct is 0,85

National choice