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Original Version
Rule 44.1 - Table 4

Strength Requirements for All Classes of Lines

Element of Line Grades of Construction
Grade "A" Grade "B" Grade "C" Grade "F"
Conductors, splices and conductor fastenings (other than tie wires)
2
2
2
1
Pins
2
2
2
1
Pole line hardware
2
2
2
2
Line Insulators (mechanical)
3
2
2
2
Guy insulators (mechanical)
Interlocking
2
2
2
2
Noninterlocking wood
3
3
3
-
Noninterlocking glass fiber
3
2(a)
2(b)
-
Guys, except in light loading rural districts
2
2
2
1.25
Guys in light loading rural districts
2
1.5
1.5
1.25
Messengers and span wires
2
2
2
2
Foundations against uplift
1.5
1.5
1.5
-
Foundations against depression
3
2
2
-
Poles Towers and Structures
Poles, Towers and Structures
4
3
2
1
Metallic service and meter poles
-
2
2
-
Structural or tubular metallic poles, towers, structures, crossarms and metallic members of foundations
1.5(c)
1.25(c)
1.25(c)
-
Reinforced concrete poles
4
3
3
-
Prestressed concrete poles, structures and crossarms
1.8
1.5
1.5
-
Other structural materials
1.8
1.25
1.25
-
Crossarms
Wood
2
2
2
1
Steel
1.5
1.25
1.25
-
Concrete
1.8
1.5
1.5
-
Other Structural material
1.5
1.25
1.25
-
(a) Insulators are to be replaced before safety factors have been reduced (due to deterioration or changes in construction, arrangement, or other conditions subsequent to installation) to less than 95 percent of the safety factor specified in Rule 44.1.
(b) Insulators are to be replaced before safety factors have been reduced (due to deterioration or changes in construction, arrangement, or other conditions subsequent to installation) to less than 75 percent of the safety factor specified in Rule 44.1.
(c) For aluminum members subject to tension caused by one or more estimated loads and where the critical load combination for the tension member would not endanger adjacent compression members, the factor of safety on ultimate tension shall be 2 for Grade “A” construction and 1.67 for Grades “B” and “C” construction.

Strikeout and Underline Version
Rule 44.1 - Table 4

Strength Requirements for All Classes of Lines

Element of Line Element Grades of Construction
Grade "A" Grade "B" Grade "C" Grade "F"
Conductors, splices and conductor fastenings (other than tie wires)
2
2
2
1
Pins
2
2
2
1
Pole line hardware
2
2
2
2
Line Insulators (mechanical)
3
2
2
2
Guy insulators (mechanical)
Interlocking
2
2
2
2
Noninterlocking wood
3
3
3
-
Noninterlocking glass fiber
3
2(a)
2(b)
-
Guys, except in light loading rural districts
2
2
2
1.25
Guys in light loading rural districts
2
1.5
1.5
1.25
Messengers and span wires
2
2
2
2
Foundations against uplift
1.5
1.5
1.5
-
Foundations against depression
3
2
2
-
Poles Towers and Structures
Wood poles
4
3
2
1
Metallic service and meter poles
-
2
2
-
Metal (including elements of Structural or tubular metallic poles, towers, structures, crossarms and metallic members of foundations)
1.5(c)
1.25(c)
1.25(c)
-
Reinforced concrete poles
4
3
3
-
Prestressed or post-tensioned concrete poles, structures and crossarms
1.8
1.5
1.5
-
Other structural engineered materials
1.8
1.25
1.25
-
Crossarms
Wood
2
2
2
1
Metal Steel
1.5 (c)
1.25 (c)
1.25 (c)
-
Prestressed Concrete
1.8
1.5
1.5
-
Other structural engineered materials
1.5
1.25
1.25
-
(a) Insulators are to be replaced before safety factors have been reduced (due to deterioration or changes in construction, arrangement, or other conditions subsequent to installation) to less than 95 percent of the safety factor specified in Rule 44.1.
(b) Insulators are to be replaced before safety factors have been reduced (due to deterioration or changes in construction, arrangement, or other conditions subsequent to installation) to less than 75 percent of the safety factor specified in Rule 44.1.
(c) For aluminum members subject to tension caused by one or more estimated loads and where the critical load combination for the tension member would not endanger adjacent compression members, the factor of safety on ultimate tension shall be 2 for Grade “A” construction and 1.67 for Grades “B” and “C” construction.

Final Version
Rule 44.1 - Table 4

Strength Requirements for All Classes of Lines

Line Element Grades of Construction
Grade "A" Grade "B" Grade "C"
Conductors, splices and conductor fastenings (other than tie wires)
2
2
2
Pins
2
2
2
Pole line hardware
2
2
2
Line Insulators (mechanical)
3
2
2
Guy insulators (mechanical)
Interlocking
2
2
2
Noninterlocking glass fiber
3
2(a)
2(b)
Guys
2
2
2
Messengers and span wires
2
2
2
Foundations against uplift
1.5
1.5
1.5
Foundations against depression
3
2
2
Poles Towers and Structures
Wood
4
3
2
Metal (including elements of foundations)
1.5(c)
1.25(c)
1.25(c)
Reinforced concrete
4
3
3
Prestressed or post-tensioned concrete
1.8
1.5
1.5
Other engineered materials
1.8
1.25
1.25
Crossarms
Wood
2
2
2
Metal
1.5 (c)
1.25 (c)
1.25 (c)
Prestressed Concrete
1.8
1.5
1.5
Other engineered materials
1.5
1.25
1.25
(a) Insulators are to be replaced before safety factors have been reduced (due to deterioration or changes in construction, arrangement, or other conditions subsequent to installation) to less than 95 percent of the safety factor specified in Rule 44.1
(b) Insulators are to be replaced before safety factors have been reduced (due to deterioration or changes in construction, arrangement, or other conditions subsequent to installation) to less than 75 percent of the safety factor specified in Rule 44.1.
(c) For aluminum members subject to tension caused by one or more estimated loads and where the critical load combination for the tension member would not endanger adjacent compression members, the factor of safety on ultimate tension shall be 2 for Grade “A” construction and 1.67 for Grades “B” and “C” construction.