1905.5 Average strength reduction.
BC § 1905.5
As data becomes available during construction, it is permissible to reduce the amount by which the average compressive strength (f 'c ) is required to exceed the specified value of f 'c in accordance with ACI 318, Section 26.4.4.1(c). A new mix design shall be submitted to the registered design professional of record for approval prior to use.













