National Wood Pole Standards

Home , H4 (classification), H5 (classification), Utility pole

• Nelson G. Bingel III • ASC O5 Chairman • NESC Chairman

President (678) 850-1461 [email protected] 1 Benefits of Wood as a Utility Pole Material

• Long-Life Span • ~45 years national average without remedial treatment

• Lowest cost • Both initial and full life-cycle costs

• Proven Performance • “Go to” overhead line construction material since the early 1900’s

• Climb-ability • Ability to service attachments without heavy equipment

2 Benefits of Wood as a Utility Pole Material

• Supply Chain is Proven • Even in natural disaster events where demand is high, the wood pole industry has provided poles in required timeline.

• Beneficial Physical Properties • Good insulator, resilience to wind and mechanical impacts

• Easy Maintenance and Modification in service

• “Green” • a treated wood pole has a reduced environmental impact when compared to other utility pole materials. • A renewable and plentiful resource

“10 Features Often Overlooked About the Extraordinary Wood Pole.” North American Wood Pole Council. www.woodpoles.org

3 ANSI

American National Standards Institute

4 ANSI

American National Standards Institute

ANSI accredits the procedures of standards developing organizations

5 ANSI

American National Standards Institute

ANSI accredits the procedures of standards developing organizations

National consensus standards

6 ANSI

American National Standards Institute

ANSI accredits the procedures of standards developing organizations

National consensus standards

Openness, balance, consensus and due process

7 American Standards Committee O5 –ASC O5

American National Standards Institute

American Standards Committee O5

USERS

PRODUCERS

GENERAL INTEREST

8 National Wood Pole Standards

ASC O5 NESC

Accredited Standards Committee O5:

Standards for Wood Utility Structures

• Secretariat: AWPA

• Revised: 5 year cycle

• Founded in 1924

9 ASC O5 Standards

Poles Glu-Lam Crossarms

O5.4 - 2009 Naturally Durable Hardwood Poles O5.5 - 2010 Wood Ground Wire Moulding O5.6 - 2010 Solid Sawn Naturally Durable Hardwood Crossarms & Braces O5.TR.01-2004 Photographic Manual of Wood Pole Characteristics

10 http://asco5.org/standards/

11 http://asco5.org/standards/

12 Scope

Single Pole

13 Scope

Simple Cantilever

Single Pole

14 Scope

Simple Cantilever

Transverse

Single Pole

15 Scope

Simple Cantilever

Transverse

Single Pole

Groundline

16 Maximum Stress Point

Solid, Round, Tapered, Cantilever

Load (Wind Force on Wires, Equip., etc.)

17 Maximum Stress Point

Solid, Round, Tapered, Cantilever

Load (Wind Force on Wires, Equip., etc.)

Max Stress @ 1.5 Diameter Load Point

18 Maximum Stress Point

Solid, Round, Tapered, Cantilever

Load (Wind Force on Wires, Equip., etc.)

Max Stress @ 1.5 Diameter Load Point

Distribution Usually Groundline

19 Maximum Stress Point

Solid, Round, Tapered, Cantilever

Load (Wind Force on Wires, Equip., etc.)

Max Stress @ 1.5 Diameter Load Point

Distribution Usually Groundline

20 ANSI O5.1 – Wood Poles

Wood Quality

21 ANSI O5.1 – Wood Poles

Wood Quality

Class Fiber Pole Loads Strength Dimensions

22 Wood Quality

• Allowable knots

23 Wood Quality

• Sweep

24 Wood Quality

• Growth Rings

25 Pole Marking & Code Letters

26 Pole Marking & Code Letters

27 Transverse Wind Loads

Ice

28 Class Loads

Horizontal 2 ft Class Load (lb) 10 370 Lc 9 740 7 1,200 6 1,500 5 1,900 4 2,400 3 3,000 2 3,700 1 4,500 H1 5,400 H2 6,400 H3 7,500 H4 8,700 H5 10,000 H6 11,400

29 General Class Load Applications

Horizontal General 2 ft Class Load (lb) Industry Use 10 370 Lc 9 740 Telecom Only Poles 7 1,200 6 1,500 5 1,900 4 2,400 Distribution 3 3,000 2 3,700 1 4,500 H1 5,400 H2 6,400 Transmission H3 7,500 H4 8,700 H5 10,000 H6 11,400

30 Strengths are Average Values

31 Wood vs. Steel Variability

ASCE Manual and Reports on Engineering Practice No. 141

32 Applied Bending Load

2 ft Lc

Class 1 4,500 lb Class 2 3,700 lb Class 3 3,000 lb Class 4 2,400 lb Class 5 1,900 lb

33 Applied Bending Load

2 ft Lc

D Class 1 4,500 lb Class 2 3,700 lb Class 3 3,000 lb Class 4 2,400 lb Class 5 1,900 lb

34 Applied Bending Load

2 ft Lc

Applied Bending Load =

Lc x D (ft-lb) D Class 1 4,500 lb Class 2 3,700 lb Class 3 3,000 lb Class 4 2,400 lb Class 5 1,900 lb

35 L x D = Bending Moment (ft-lb)

40 ft Class 4

2400 lb

32 ft

76,800 ft-lb

36 L x D = Bending Moment (ft-lb)

50 ft Class 4

40 ft Class 4 2400 lb

2400 lb

41 ft

32 ft

76,800 ft-lb 98,400 ft-lb

37 Fiber Strength

38 Fiber Strength

Tension Compression (psi) (psi)

39 Fiber Strength

Tension Compression Fiber Strength (psi) (psi)

40 Fiber Strength

Bending Capacity = k x fiber strength x C3 (ft-lb)

Tension Compression Fiber Strength (psi) (psi)

41 Circumference3 Effect

3 MG/L = .000264 x Fiber Stress x Circumference

34” 26”

37,120 ft-lb 83,010 ft-lb

Circumference Increase - 30% Bending Capacity Increase - 123%

42 Circumference3 Effect

3 MG/L = .000264 x Fiber Strength x Circumference

34” 26”

37,120 ft-lb 83,010 ft-lb

Circumference Increase - 30% Bending Capacity Increase - 123%

43 Circumference3 Effect

3 MG/L = .000264 x Fiber Strength x Circumference

34” 26” 80-90% Pole’s Bending Strength In The Outer 2-3” Of Shell! 37,120 ft-lb 83,010 ft-lb

Circumference Increase - 30% Bending Capacity Increase - 123%

44 Table 1 – Designated Fiber Strength

45 Table 1 – Designated Fiber Strength

Group A Air Seasoning

46 Table 1 – Designated Fiber Strength

Group A Air Seasoning

Group B Boulton Drying

47 Table 1 – Designated Fiber Strength

Group A Air Seasoning

Group B Boulton Drying

Group C Steam Conditioning

48 Table 1 – Designated Fiber Strength

Group A Air Seasoning

Group B Boulton Drying

Group C Steam Conditioning

Group D Kiln Drying

49 Table 1 – Designated Fiber Strength

Southern Yellow Pine 8,000 psi

Douglas fir 8,000 psi

Western red cedar 6,000 psi

50 Pole Species

51 Pole Species

52 Pole Species

Distribution: Southern Yellow Pine

Transmission: Douglas fir Western red cedar Southern Pine

53 Pole Species

Distribution: Douglas fir Distribution: Southern Yellow Pine Transmission Douglas fir Transmission: Western red cedar Douglas fir Western red cedar Southern Pine

54 Table 1 – Designated Fiber Strength

55 Table 1 – Designated Fiber Strength

1) The effects of conditioning on fiber strength have been accounted for in the Table 1 values provided that conditioning was performed within the limits herein prescribed.

56 Table 1 – Designated Fiber Strength

1) The effects of conditioning on fiber strength have been accounted for in the Table 1 values provided that conditioning was performed within the limits herein prescribed.

4) The designated fiber strength represents a mean, groundline, fiber strength value with a coefficient of variation equal to 0.20.

57 Through-boring

58 Oregon State University -Through-Boring Project-

59 60 61 Through-boring

62 Table 1 – Designated Fiber Strength

1) The effects of conditioning on fiber strength have been accounted for in the Table 1 values provided that conditioning was performed within the limits herein prescribed.

4) The designated fiber strength represents a mean, groundline, fiber strength value with a coefficient of variation equal to 0.20.

5) Where Douglas-fir (coastal or Interior North) are through-bored prior to treatment, to account for the process, the designated fiber strength shall be reduced 5% to 7600 psi.

63 2017 Table 1 added MOE

64 2017 Table 1 added MOE

65 2017 Table 1 added MOE

1) The fiber strength and MOE values in Table 1 apply to wood utility poles meeting this standard. The effects of conditioning on fiber strength and MOE have been accounted for ……..

66 2017 Table 1 added MOE

1) The fiber strength and MOE values in Table 1 apply to wood utility poles meeting this standard. The effects of conditioning on fiber strength and MOE have been accounted for ……..

7) The Modulus of Elasticity (MOE) represents a mean value.

67 Circumference Dimensions

6ft

G/L TIP

68 Circumference Dimensions

6ft

G/L TIP

Bending Capacity = k x fiber strength x C3 (ft-lb)

69 Circumference Dimension Tables

70 Circumference Dimension Tables

71 Circumference Dimension Tables

1) The figures in this column are not recommended embedment depths; rather, these values are intended for use only when a definition of groundline is necessary in order to apply requirements relating to scars, straightness, etc.

72 Circumference Dimension Tables

73 Annex B: Groundline Stresses

74 Annex B: Groundline Stresses

Minimum circumferences specified at 6 feet from the butt

Were calculated so each species in a given class

Can support the class horizontal load applied 2 ft from the tip

75 Annex B: Groundline Stresses

Minimum circumferences specified at 6 feet from the butt

Were calculated so each species in a given class

Can support the class horizontal load applied 2 ft from the tip

Applied Bending Load =

Lc x D (ft-lb)

76 Annex B: Groundline Stresses

Minimum circumferences specified at 6 feet from the butt

Were calculated so each species in a given class

Can support the class horizontal load applied 2 ft from the tip

Applied Bending Load = Bending Capacity = 3 Lc x D (ft-lb) k x fiber strength x C (ft-lb)

77 Pole Dimension Table

Southern Pine and Douglas Fir

(in)

78 Pole Dimension Table

Southern Pine and Douglas Fir

(in)

79 Pole Dimension Table

Southern Pine and Douglas Fir

(in)

80 Pole Dimension Table

Southern Pine and Douglas Fir

Applied Bending Load= Class Load * Distance

76,800 ft-lbs= 2,400 lbs* 32ft

(in)

81 Pole Dimension Table

Southern Pine and Douglas Fir

Applied Bending Load= Class Load * Distance

76,800 ft-lbs= 2,400 lbs* 32ft

(in) Bending Capacity = k x fiber strength x C3

79,401 ft-lbs= .000264 x 8000x 33.53

82 40 ft Class 4 Poles

Douglas fir Western Red Cedar (8000 psi) (6000 psi)

83 40 ft Class 4 Poles

2400 lb

Douglas fir Western Red Cedar (8000 psi) (6000 psi)

84 40 ft Class 4 Poles

2400 lb

Douglas fir Western Red Cedar (8000 psi) (6000 psi)

33 1/2” 36 1/2”

85 Annex B: Groundline Stresses

Note 7

86 Annex B: Groundline Stresses

Note 7

Average circumference tapers in the groundline zone of a pole

87 ANSI O5.1 Summary

2 ft Lc

Bending Capacity = k x fiber strength x C3 (ft-lb)

88 ANSI O5.1 Summary

2 ft Lc

Bending Capacity = k x fiber strength x C3 (ft-lb)

89 ANSI O5.1 Summary

2 ft Lc

All Species Same Length & Class Similar Load Capacity

Bending Capacity = k x fiber strength x C3 (ft-lb)

90 ANSI O5.1 Summary

2 ft Lc

All Species Same Length & Class Similar Load Capacity

Bending Capacity = k x fiber strength x C3 (ft-lb)

91 ANSI O5.1 Summary

2 ft Lc

All Species Same Length & Class Similar Load Capacity

Bending Capacity = k x fiber strength x C3 (ft-lb)

92 Fiber Strength Values

Forest Products Lab

1965 Publication

Fiber Strength Derivation

93 FPL 39 Table 4 Final Adopted Fiber Strengths

94 FPL 39 Table 4 Final Adopted Fiber Strengths

Near 5% Lower Exclusion Limit Of Actual Average Bending Strength Of Three Pole Groups

95 Newer Test Data That Was Adjusted to Align with FPL 39 Annex C – Poles <50 ft

96 Newer Test Data That Was Adjusted to Align with FPL 39 Annex C – Poles 50 ft and longer

97 All Adjusted Full Scale Break Tests

ASTM

EPRI

98 All Adjusted Full Scale Break Tests

ASTM No Change to Previous Fiber StrengthsEPRI

99 Annex A Fiber Stress Height Effect

100 Annex A Fiber Stress Height Effect

Round timbers are known to decrease in ultimate unit strength with height above ground.

101 Actual Pole Dimensions

      WA   E  M M  T ND

 O MN  R VT  ID NH  WI MI SD NY MA  RI W CT  Y A IA P NJ NE NV OH D DE UT IL IN DMC C A CO WV VA KS MO KY

NC TN OK AZ    NM AR SC   GA MS AL  

TX    LA   Sample Locations FL  Coastal Douglas Fir (8)  Coastal DF & Western Red (3)  Northern Red Pine (3)  Southern Yellow Pine (16)  Western Red Cedar (5)

102 Pole Circumference Data

• Coastal Douglas fir 6,997 poles 9 Producers; 11 Locations

• Southern Yellow Pine 6,634 poles 11 Producers; 16 Locations

• Western Red Cedar 6,982 poles 5 Producers; 9 Locations

• Northern Red Pine 2,266 poles 2 Producers; 4 Locations

103 Pole Circumference Data

• Coastal Douglas fir 6,997 poles 9 Producers; 11 Locations

• Southern Yellow Pine 6,634 poles 11 Producers; 16 Locations

• Western Red Cedar 6,982 poles 5 Producers; 9 Locations

• Northern Red Pine 2,266 poles 2 Producers; 4 Locations Grand Total 22,859 poles

104 Fiber Stress Height Effect (FSHE)

• Tips average 1.5 to 2 classes larger

• Poles 55 ft and shorter • Maximum stress is usually at G/L – FSHE not applied • Maximum stress for guyed poles may be above G/L – Oversize offsets fiber stress height effect

• Poles 60 ft and taller • If maximum stress is at the G/L, no FSHE • If maximum stress is above ground, tables for reduction

105 ASC O5 Standards http://asco5.org/standards/

Poles Glu-Lam Crossarms

106 National Wood Pole Standards

ASC O5 NESC

Accredited Standards Committee O5:

Standards for Wood Utility Structures

• Secretariat: AWPA

• Revised: 5 year cycle

• Founded in 1924

107 National Overhead Line Standard

NESC

ANSI C2:

National Electrical Safety Code

• Secretariat: IEEE (Institute of Electrical and Electronics Engineers)

• Revised: 5 year cycle

• Established in 1915

108 NESC Committee Structure

Main Chairman Vice Chair Secretary-IEEE Committee 25 – 35 Members

Executive Chairman Secretary Subcommittee 6 - 10 Members

Chairman Secretary Technical Subcommittees SC 1 – Coordination; Sections 1,2,3 SC 2 – Grounding SC 3 – Substations SC 4 – Overhead Lines – Clearances SC 5 – Overhead Lines – Strength & Loading SC 7 – Underground Lines SC 8 – Work Rules

109 Purpose of the NESC

110 Purpose of the NESC

B. NESC rules contain the basic provisions, under specified conditions, that are considered necessary for the safeguarding of: 1. The Public 2. Utility workers (employees and contractors), and 3. Utility facilities C. This code is not intended as a design specification or as an instruction manual.

111 NESC Committee Structure

Main Chairman Vice Chair Secretary-IEEE Committee 25 – 35 Members

Executive Chairman Secretary Subcommittee 6 - 10 Members

112 Overhead Lines Subcommittee 5

Section 24 Section 25 Section 26 Grades of Construction Loading for Grade B&C Strength requirements

• Grades B, C & N • Load Factors • Strength Factors (B is the highest) • Rule 250B: Combined Ice and Wind District Loading

• Rule 250C: Extreme Wind Loading

• Rule 250D: Extreme Ice with Concurrent Wind Loading

113 Overhead Lines Subcommittee 5

Section 24 Section 25 Section 26 Grades of Construction Loading for Grade B&C Strength requirements

• Grades B, C & N • Load Factors • Strength Factors (B is the highest) • Rule 250B: Combined Ice and Wind District Loading • Rule 250C: Section 27 Extreme Wind Loading Insulators • Rule 250D: Extreme Ice with Concurrent • Electrical Strength Wind Loading • Mechanical Strength

114 Section 24: Grades of Construction

• Grade B: (3.85 SF) • Crossing Limited Access Highways • Crossing Railways • Crossing Navigable Waterways

• Grade C: (2.06 SF) • All other standard construction

• Grade N: (Strength shall exceed expected loads) • Mainly used for temporary and emergency construction

115 Section 25 – Loadings for Grade B & C

TRANSVERSE V E R T I C A L

116 Transverse Loading Usually Governs

TRANSVERSE V E R T I C A L

117 Calculating Transverse Loads

Wind Bending Loads On:

118 118 Calculating Transverse Loads

Wind Bending Loads On: Wires Ice

119 119 Calculating Transverse Loads

Wind Bending Loads On: Wires Ice Pole

120 120 Calculating Transverse Loads

Wind Bending Loads On: Wires Ice Pole Equipment

121 121 Calculating Transverse Loads

Wind Bending Loads On: Wires Ice Pole Equipment

Offset Bending Loads

122 122 Calculating Transverse Loads

Wind Bending Loads On: Wires Ice Pole Equipment

Offset Bending Loads

Wire Tension

123 123 Section 25: Loading for Grade B & C

• Rule 250B: District Loading Combined Ice and Wind

• Rule 250C: Extreme Wind Loading (60ft Exemption)

• Rule 250D: Extreme Ice With Concurrent Wind Loading (60ft Exemption)

124 NESC District Loading Winter Storm

125 NESC District Loading Winter Storm

½” Ice – 40 mph

¼” Ice – 40 mph

0” Ice – 60 mph

126 NESC District Loading Winter Storm

½” Ice – 40 mph

¼” Ice – 40 mph

40 mph = 4 lbs/sqft 0” Ice – 60 mph 60 mph = 9 lbs/sqft

127 Medium Loading District

40 mph

¼” Ice

128

128 Wind Load Increase per Wire Sizes

0.75” 2x 1.50” 2x 3.00”

+100% +200%

Double wire diameter = Double the load

129 Wind Load Increase With 0.25” Radial Ice

0.75” 1.50” 3.00” .25” Ice

1.25” 2.00” 3.50” +67% +33% +17%

130 District Loads vs. Wire Size

6 NESC-L 5 No ICE

4 NESC-M 1/4” ICE 3 NESC-H 2 1/2” ICE

RELATIVE LOAD RELATIVE 1

0 4ACSR 1/0 336 556 CONDUCTOR (SMALLEST TO LARGEST)

131 Section 25: Loading for Grade B & C

• Rule 250B: District Loading Combined Ice and Wind

132 Section 25: Loading for Grade B & C

• Rule 250B: District Loading Deterministic Combined Ice and Wind

133 Extreme Wind– Rule 250C (60 ft. Exclusion) Summer Storm

85 mph = 18.5 lbs/sqft 90 mph = 21 lbs/sqft 130 mph = 43 lbs/sqft 150 mph = 58 lbs/sqft 134 Extreme Ice with Concurrent Wind –Rule 250D (60 ft. Exclusion) Winter Storm

Radial Ice 0” Wind Speeds 0.25” 30 mph 0.5” 40 mph 0.75” 50 mph 1.0” 60 mph

135 Section 25: Loading for Grade B & C

• Rule 250B: District Loading Deterministic Combined Ice and Wind

• Rule 250C: Extreme Wind Loading (60ft Exemption)

• Rule 250D: Extreme Ice With Concurrent Wind Loading (60ft Exemption)

136 Section 25: Loading for Grade B & C

• Rule 250B: District Loading Deterministic Combined Ice and Wind

• Rule 250C: Extreme Wind Loading Probabilistic (60ft Exemption)

• Rule 250D: Extreme Ice With Concurrent Wind Loading (60ft Exemption)

137 Section 25: Loading for Grade B & C

• Rule 250B: District Loading Deterministic Combined Ice and Wind

• Rule 250C: Extreme Wind Loading Probabilistic (60ft Exemption)

• Rule 250D: Extreme Ice Probabilistic With Concurrent Wind Loading (60ft Exemption)

138 Section 25 Load Cases

• Rule 250 B - Combined Ice & Wind – Light 0” Ice 60 mph – Medium ¼” Ice 40 mph – Heavy ½” Ice 40 mph – Loads to be Factored

• Rule 250 C – Extreme Wind – Poles Taller than 60 feet Above Ground – Wind only (no ice) – Ultimate Load with probability of occurrence

• Rule 250 D – Extreme Ice with Wind – Poles Taller than 60 feet Above Ground – Ice Thickness with Concurrent Wind – Ultimate Load with probability of occurrence

139 Load

Strength

Alternate Method Pole Strength > Storm Load x 4 (B) Pole Strength > Storm Load x 2 (C) 140 Load

Strength Strength Pole Strength x SF > Pole Strength x SF > Alternate Method Pole Strength > Storm Load x 4 (B) Pole Strength > Storm Load x 2 (C) 141 Load

Strength Strength Load Pole Strength x SF > Storm Load x LF (B) Pole Strength x SF > Storm Load x LF (C) Alternate Method Pole Strength > Storm Load x 4 (B) Pole Strength > Storm Load x 2 (C) 142 Section 25: Table 253.1-Load Factors

Grade B Grade Cx Grade C

Vertical Loads 1.50 1.90 1.90

Transverse Loads (wind) 2.50 2.20 1.75 Rule 250B Rule

Longitudinal Loads 1.10 No Req. No Req.

Wind Loads 1.00 1.00 1.00 250C

Ice and Wind 1.00 1.00 1.00 loads 250D

143 Section 25: Table 253.1-Load Factors

Grade B Grade Cx Grade C

Vertical Loads 1.50 1.90 1.90

Transverse Loads (wind) 2.50 2.20 1.75 Rule 250B Rule

Longitudinal Loads 1.10 No Req. No Req.

Wind Loads 1.00 1.00 1.00 250C

Ice and Wind 1.00 1.00 1.00 loads 250D

144 Section 26: Strength Factors

Table 261‐1 Grade B Grade C

Metal Structures 1.0 1.0

Rule 250B Rule Wood Structures 0.65 0.85

Metal Structures 1.00 1.00

Wood Structures 0.75 0.75 250C & 250D

145 Section 26: Strength Factors

Table 261‐1 Grade B Grade C

Metal Structures 1.0 1.0 Fiber Strength (ANSI) × Strength Factor (NESC)= Rule 250B Rule Wood Structures 0.65 0.85 Allowable Stress of Pole

Metal Structures 1.00 1.00

Wood Structures 0.75 0.75 250C & 250D

146 Section 26: Strength Factors

Table 261‐1 Grade B Grade C

Metal Structures 1.0 1.0 Fiber Strength (ANSI) × Strength Factor (NESC)= Rule 250B Rule Wood Structures 0.65 0.85 Allowable Stress of Pole

Metal Structures 1.00 1.00

Wood Structures 0.75 0.75 250C & 250D

147 Load

Strength Strength Load Pole Strength x .65 > Storm Load x 2.5 (B) Pole Strength x .85 > Storm Load x 1.75 (C) Alternate Method Pole Strength > Storm Load x 4 (B) Pole Strength > Storm Load x 2 (C) 149 Load

Strength Strength Load Pole Strength x .65 > Storm Load x 2.5 (B) Pole Strength x .85 > Storm Load x 1.75 (C) Alternate Method Pole Strength > Storm Load3.85 x 4 (B) Pole Strength > Storm Load2.06 x 2 (C) 150 Section 24: Grades of Construction

• Grade B: (3.85 SF) • Crossing Limited Access Highways • Crossing Railways • Crossing Navigable Waterways

• Grade C: (2.06 SF) • All other standard construction

• Grade N: (Strength shall exceed expected loads) • Mainly used for temporary and emergency construction

151

900 lb

Equate the Total Storm Load to a Single Horizontal Load applied 2 feet from the tip. Load < Strength

NESC ANSI O5.1 Grade B

900 lb Storm Load Class 1 4500 lb Class 2 3700 lb x 3.85 (Grade B) Class 3 3000 lb = 3465 lb Class 4 2400 lb Class 5 1900 lb Load < Strength

NESC ANSI O5.1 Grade C

900 lb Storm Load Class 1 4500 lb Class 2 3700 lb x 2.06 (Grade C) Class 3 3000 lb = 1854 lb Class 4 2400 lb Class 5 1900 lb

155 156 Length

157 Length Clearance

158 Length Clearance

Class

159 Length Clearance

Class Capacity

160 Length Clearance

Class Capacity Class 1 4,500 lb Class 2 3,700 lb Class 3 3,000 lb Class 4 2,400 lb Class 5 1,900 lb 161 Online Courses – MOOC’s

MOOC #1 NESC Overview

MOOC #2 2017 Changes

162 Technical Subcommittees

SC1 - Coordination between technical subcommittees Sections 1, 2 and 3

 SC2 - Grounding Methods - Section 9

 SC3 - Electric Supply Stations - Sections 10-19

 SC4 -Overhead Lines -Clearances -Section 20-23

 SC5 - Overhead Lines - Strength and Loading - Sections 24-27  SC7 - Underground Lines - Sections 30-39

 SC8 - Work Rules - Sections 40-43

163 Online Courses – MOOC’s

MOOC #1 NESC Overview

MOOC #2 2017 Changes

MOOC #3 Grounding Methods

MOOC #4 Electric Supply Stations

MOOC #5 Overhead Lines – Clearances and S&L

MOOC #6 Underground Lines

MOOC #7 Work Rules

164 NESC Mobile App

Released !!!!

• Mobile device or tablet

• iOS, Android, Windows

• Full printed document

• Enhanced features – Instant access to formulas, equations and calculations with context – Quick look-up of terms – Quick access to sections

165 NESC Mobile App

Home Page Table of Contents Tables & Equations

166 NESC Mobile App

Search the NESC Search IEEE

167 National Wood Pole Standards

• Nelson G. Bingel III • ASC O5 Chairman • NESC Chairman

President (678) 850-1461 [email protected] 168