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Service Life Chart

ESTIMATED MATERIAL SERVICE LIFE FOR CSP
ESTIMATED
SERVICE LIFE
SITE ENVIRONMENTAL CONDITIONS MAXIMUM FHWA ABRASION LEVEL CSP MATERIAL
Minimum
100 Years
5.0 ≤ pH ≤ 9.0
r > 1500 ohm-cm
Level 3 Polymer Coated
Level 2 Aluminized Type 2*
Minimum
75 Years
4.0 ≤ pH ≤ 9.0
r ≥ 750 ohm-cm
Level 3 Polymer Coated
5.0 ≤ pH ≤ 9.0
r
> 1500 ohm-cm
Level 2 Aluminized Type 2
Minimum
50 Years
3.0 ≤ pH ≤ 12.0
r ≥ 250 ohm-cm
Level 3 Polymer Coated
Average
50 Years
6.0 ≤ pH ≤ 10.0
2000 ≤ r ≤ 10,000
ohm-cm
> 50 ppm CaCo3
Level 2 Galvanized

* 14 gauge minimum.

For additional information, see the CSP Design Manual Page 476.

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