// CODE SNIPPET
1905.3.3 Test Records and Trial Mixtures
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Field strength test records or trial mixtures used to determine f'cr shall not be more than 24 months old measured from the date of batching, provided the materials are the same as those proposed for use and the concrete producer provides a written statement confirming the materials are the same as those proposed for use.
Exceptions:
- Coarse aggregates may be acquired from an alternative source provided the nominal maximum size and the volume of coarse aggregate used remain unchanged.
- Fine aggregates may be acquired from an alternative source provided the volume of fine aggregate used remains unchanged.
Related Code Sections
1905.3.3 Concrete, Test Records and Trial Mixtures
Field strength test records or trial mixtures used to determine f ' cr shall not be more than 24 months old measured from the date of batching ...
NYC Building Code 2014 > 19 Concrete > 1905 Concrete Quality, Mixing and Placing > 1905.3 Proportioning on the Basis of Field Experience and/or Trial Mixtures > 1905.3.3 Test Records and Trial Mixtures
1905.3.3 Concrete, Test Records and Trial Mixtures
Field strength test records or trial mixtures used to determine f ' cr shall not be more than 24 months old measured from the date of batching ...
NYC Building Code 2022 > 19 Concrete > 1905 Concrete Quality, Mixing and Placing > 1905.3 Proportioning on the Basis of Field Experience and/or Trial Mixtures > 1905.3.3 Test Records and Trial Mixtures
Reference Standard 10 Structural Work [PDF] (page 22)
" at the end of the sentence. 5.3.2.2 -Delete in its entirety, including Table 5.3.2.2. 5.3.3 -Delete the words "several strength test records, or trial ...
Section 1905 Concrete, Concrete Quality, Mixing and Placing
test records or trial mixtures used to determine f ' cr shall not be more than 24 months old measured from the date of batching, provided ...
1905.3.5 Concrete, Field Changes to Concrete Proportions
are permitted without requiring additional trial mixtures or field strength test records, provided: There are no changes to the type and source of materials ...
NYC Building Code 2014 > 19 Concrete > 1905 Concrete Quality, Mixing and Placing > 1905.3 Proportioning on the Basis of Field Experience and/or Trial Mixtures > 1905.3.5 Field Changes to Concrete Proportions