Change List for this Rule

 

Original Version

Rule 49.2-C2

 

49.2-C2)    Longitudinal Loads Normally Unbalanced: Where crossarms are subjected to unbalanced longitudinal loads they shall have sufficient strength to meet the strength requirements with safety factors at least equal to those specified in Rule 44.

At unbalanced corners and dead ends, in Grades A, B or C construction, where conductors are supported on pins and insulators, double crossarms shall be used to permit conductor fastenings at two insulators and thus retard slipping.

For conductors tensions up to 2000 pounds per conductor, double pins with double wood crossarms fitted with spacing devices at each end will be considered as meeting the strength requirements of Rules 47.4 and 47.5.

 

Strikeout and Underline Version

Rule 49.2-C2

 

49.2-C2)    Longitudinal Loads Normally Unbalanced: Where Crossarms subjected to unbalanced longitudinal loads shall have sufficient strength to meet the strength requirements with safety factors at least equal to those specified in Rule 44 .

At unbalanced corners and dead ends in Grades A, B or C construction, where conductor are supported on pins and tension is held by cantilever strength of pintype insulators and pins, double crossarms shall be used to permit conductor fastenings at two insulators to prevent slipping. In lieu of double crossarms and double insulators, single crossarms may be used with single insulators and steel pins and prefabricated conductor ties.

For conductor tensions up to 2,000 pounds per conductor, double pins with double wood crossarms fitted with spacing devices at each end will be considered as meeting the strength requirements of Rules 47.4 and 47.5.


Final Version

Rule 49.2-C2

 

49.2-C2)    Longitudinal Loads Normally Unbalanced: Crossarms subjected to unbalanced longitudinal loads shall have sufficient strength to meet the strength requirements with safety factors at least equal to those specified in Rule 44 .

At unbalanced corners and dead ends in Grades A, B or C construction, where conductor tension is held by cantilever strength of pintype insulators and pins, double crossarms shall be used to permit conductor fastenings at two insulators to prevent slipping. In lieu of double crossarms and double insulators, single crossarms may be used with single insulators and steel pins and prefabricated conductor ties.

For conductor tensions up to 2,000 pounds per conductor, double wood crossarms fitted with spacing devices at each end will be considered as meeting the strength requirements of Rules 47.4 and 47.5 .