Original Version

Rule 21.7-C

21.7-C.    Tower Lines (Class H, L and T) mean supply lines, the supporting structures of which are of steel or other metal and have a maximum outside dimension of more than 4 feet measured either along or across the line in a horizontal plane at the ground level.  Metal supporting structures, “A” frames or “H” structures, having a dimension from outside of one support to outside of another support greater than 4 feet at the ground level will be classified as towers.

Note-Steel or metal structures having maximum outside dimensions of 4 feet or less, measured along and cross the line in a horizontal plane at the ground level, will be classified as poles under supply lines.

Strikeout and Underline Version

Rule 21.7-C

21.7-C.    Tower Lines (Class E, H, L and T) mean supply lines, the supporting structures of which are of steel or other metal and have a maximum outside dimension of more than 4 feet measured either along or across the line in a horizontal plane at the ground level.  Metal supporting structures, “A” frames or “H” structures, having a dimension from outside of one support to outside of another support greater than 4 feet at the ground level will be classified as towers.

Guyed V-type or Y-type-metal structures will be classified as towers.

Note-Steel or metal structures having maximum outside dimensions of 4 feet or less, measured along and cross the line in a horizontal plane at the ground level, will be classified as poles under supply lines.

Final Version

Rule 21.7-C

21.7-C.    Tower Lines (Class E, H, L and T) mean supply lines, the supporting structures of which are of steel or other metal and have a maximum outside dimension of more than 4 feet measured either along or across the line in a horizontal plane at the ground level.  Metal supporting structures, “A” frames or “H” structures, having a dimension from outside of one support to outside of another support greater than 4 feet at the ground level will be classified as towers.

Guyed V-type or Y-type-metal structures will be classified as towers.

Note-Metal structures having maximum outside dimensions of 4 feet or less, measured along and cross the line in a horizontal plane at the ground level, will be classified as poles under supply lines.