2013ANSI/UL 5085-1-2013 Standard for Safety for Standard for Low Voltage Transformers - Part 1: General Requirements
1999LST 1551.1-1999 Concrete articles for tiding surroudings. Testing methods. Determination of compressive and tensile strength
LST 1551.1-1999 Concrete articles for tiding surroudings. Testing methods. Determination of compressive and tensile strength was changed to ANSI/UL 5085-1-2013 Standard for Safety for Standard for Low Voltage Transformers - Part 1: General Requirements.