1905.6.2.1 Minimum frequency.
BC § 1905.6.2.1
For the first 250 cubic yards of each class of concrete placed each day, samples for strength tests of each such class shall be taken: (i) not less than once a day; (ii) not less than once for each 50 cubic yards (38 m 3 ) of concrete; and (iii) not less than once for each 5,000 square feet (465 m 2 ) of surface area for slabs or walls. After the first 250 cubic yards (191 m 3 ), samples for strength tests of each class of concrete placed each day shall be taken once for each additional 150 cubic yards (115 m 3 ). For structural concrete exposed to exposure class C2, additional field testing of the concrete for water content per AASHTO T 318 shall be required. At the discretion of the registered design professional of record, the frequency of testing may be reduced, but not less than once for each 150 cubic yards (115 m 3 ).
