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standard inside diameter dimension ratio (SIDR)

The ratio of the average specified inside diameter to the minimum specified wall thickness of a pipe.
References in periodicals archive ?
Prepared by the Direct Design of Buried Concrete Pipe Box Sections Standards Committee of the Construction Institute (CI) of the American Society of Civil Engineers (ASCE), this book outlines Standard ASCE/CI 15-17 for direct design of buried precast concrete pipe using standard installations, known as SIDD (Standard Installations Direct Design), manufactured in accordance with ASTM C 1417.
Although SIDD may teach clinical decision-making skills, providing numerous cases did not guarantee learning for all participants.
Dependent measures include participants' decisions recorded objectively to disk during use of SIDD and subjective evaluations of difficulty level.