SECTION 820 TIMBER POLES
820.01 REQUIREMENTS. Provide poles of Southern Pine conforming to ANSI
Specification 05.1. Provide poles of the length and ANSI size classification specified in the Contract. The Department will not allow sweep exceeding one inch in 10 feet or double sweep. Treated timber poles shall meet all the general requirements of this subsection and shall be treated with pentachlorophenol (oil borne) or CCA (water borne) preservative as noted in AASHTO M133 in accordance with requirements of the current AWPA standards. Treat poles with pentachlorophenol conforming to AWPA P35 according to AWPA U1 or CCA conforming to AWPA P23 according to AWPA U1. Ensure that net retention is no less than 0.75 pounds per cubic foot on the outer 1/2-inch and no less than 0.45 pounds per cubic foot in the 1/2 to one-inch zone with average retentions of no less than 0.80 and 0.50 pounds per cubic foot, respectively. Follow the guidelines for the care of preservative treated wood products as set in AWPA M4.
820.02 ACCEPTANCE. The Department will inspect, test and accept poles according
to Subsection 818.01. 820-1 SECTION 821 — STRUCTURAL COATINGS
821.01 DESCRIPTION. This section covers requirements for structural coating systems
used in bridge construction and maintenance.
821.02 GENERAL REQUIREMENTS. Select structural coatings systems conforming
to this section and included on the Department’s List of Approved Materials. Use only coating system components that are factory mixed and delivered ready for use. Do not allow the use of partial kits. Sediment formed during shipment must be easily dispersed with a power mixer to produce a smooth, uniform coating having good spreading characteristics. Reject coatings that excessively gel, or cakes in the container. Ensure the coatings produce a smooth uniform finish without sags or streaks. Ensure successive coating applications, i.e. intermediate coat to prime coat, differ in color a minimum of 10.0 ΔE*. The following colors are standard colors for use in the production of structural coatings. The name and Federal Standard 595B color number provided are for reference only. Manufacturers are to produce finish coat colors that comply within 2.0 ΔE* of the L* a* b* values listed below or as specified in the contract. Color Fed Standard 595B No. L* a* b* Gray X6187 48.17 -3.54 -0.87 Camo Green X4172 45.17 -12.70 9.86 Dark Green X4066 24.95 -35.59 5.82 Grass Green X4272 58.30 -21.64 12.26 Light Blue n/a 66.56 -7.26 -20.10 Medium Blue X5180 39.35 -0.12 -42.76 Kentuck y Blue X5095 35.44 9.83 -48.11 Buttercream Yellow X3798 88.41 -1.92 35.02 Yellow X3618 81.82 -0.57 57.55 Light Bei ge X6521 74.71 1.92 9.88 Aluminized Silve r n/a 66.56 -0.59 -0.33 Maroon X0160 33.65 28.49 6.61 Light Gray For Concrete X6492 74.94 -1.54 3.92 Store coatings at temperatures above 32 ºF and below the most restrictive maximum ambient air temperature for the coating system stated on the coating manufacturer’s product data sheets. Equip storage areas with high- low thermometers capable of measuring and recording the appropriate temperature range. Do not store coating systems in direct sunlight. The Engineer will reject or retest coatings exposed to temperatures outside this range.
821.03 APPROVAL. The Department will approve structural coating systems based on
performance data obtained in accordance with KM 64-266.
821.04 SAMPLING AND TESTING. The Department will sample and test each
shipment of each lot of coating delivered to the project in accordance with the Department’s Materials Field Sampling Manual. Allow the Department 10 working days from the date received by the Division of Materials to test an d approve samples. Retest coatings that are not used within 6 months from their approval. Additionally, retest coatings that are stored between painting seasons. Remove rejected coatings from the job site before starting painting operations.
821.05 CERTIFICATION. Submit manufacturer’s certification stating conformance to
the requirements of this section for each shipment of approved structural coatings delivered for use on projects. Clearly state the manufacturer and product name as listed in the Department’s List of Approved Materials. Identify the lot number(s), expiration date, and 821-1