Strength Ratings for Composite Transmission and Distribution Tuff-Poles®
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The class of composite utility pole to be used for a particular application is dictated by the National Electrical Safety Code (ANSI C2). Select the Engineered Composite pole class appropriate to your application, and insert its properties in the Recommended Specification for your project.  Pole class equivalents, strength calculation formula, and other data are given in our Pole Products Catalog (PDF online). An important difference, between fiberglass and wood poles is that our utility poles' strength does no fade over time. The class you install does not change.  See 10 Most Frequently Asked Questions and Shakespeare Composite Structures

Engineering and Specification Guide.
Composite T&D Pole Maximum Strength Available
(Class equivalent)
Pole Length
 Maximum Strength Available
 Maximum TB Series
30’ 10,000# H6
35’ 10,000# H6
40’ 10,000# H6
45’ 10,000# H6
50’ 8,000# H6
55’ 7,000# H5
60’ 6,000# H4
65’ 5,500# H3
70’ 4,500# H2
75’ 4,000# H1


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Shakespeare Composite Structures is a Philips group brand
19845 Highway 76, Newberry, SC 29108
803.276.5504 · 800.800.9008 · Fax: 803.276.8940 · www.skp-cs.com