Does a Type I concrete masonry unit in Arizona meet the same requirements as a Type I concrete masonry unit in Florida?
No. To classify as a Type I unit, a unit's moisture content must not exceed the percentage listed in Table 1 of ASTM C 90, Standard Specification for Loadbearing Concrete Masonry Units. The maximum permissible moisture content will depend on the humidity conditions at the jobsite where the unit will be used and the percentage linear shrinkage of the unit, which is a function of its composition and curing. A Type I concrete masonry unit to be used in Arizona may have a 25% to 30% lower moisture content as a percentage of total absorption than the same unit used in Florida.