1084PILES

Treat sign posts and battens in accordance with AASHTO M -133 or AWPA Standard U1, Commodity Specification A: Sawn Products UC4B . The same type of preservative shall be used throughout the e ntire length of the project. All timber shall have moisture content of not greater than 19% before treatment. Redry timber treated with chromated copper arsenate after treatment until it has moisture content of not greater than 25%.

Treat poles in a ccordance with AASHTO M -133 or AWPA Standard U1, Commodity Specification D: Poles, UC4C. The same type of preservative shall be used throughout the entire length of the project. PILES -1 PILES

Timber for treated timber piles shall meet Article 1082 -3. Give treated timber piles a preservative treatment in accordance with Article 1082 -4.

Coat steel piles as required by the plans. Galvanizes teel piles in accordance with Section 1076 or metallize steel piles in accordance with the Thermal Sprayed Coatings

NCDOT APL. Apply a barrier coat to a ny portion of the aluminum me tallized steel piling encased in concrete. Use an approved waterborne barrier coating with a low -viscosity as found on the NCDOT APL which readily absorbs into the pores of the a luminum thermal sprayed coating. A pply waterborne coating at the spreading rate that results in a theoretical 1.5 mil dry film thickness. Provide a manufacturer certification in accordance with Article 26

106-3Type 2 Certification that the resin chemistry of the waterborne coating is compatible

with the 99.9% aluminum thermal sprayed alloy and suitable for tidal water applications. Before incorporating steel piles into the work, obtain all applicable certified M ill Test Reports clearly identifiable to the lot of material by heat numbers, submit these reports to the Engineer for review and analysis and receive approval of such test reports from the Engineer. Transfer the heat number of each painted pile to the newly painted surface with a permanent marker o f a color contrasting to the paint once the paint has fully cured.

Steel H -piles shall meet ASTM A572 Grade 50 or ASTM A588.

Use uniform diameters teel pipe piles conforming to ASTM A252 Grade 3 modified (50,000 psi). Make all joints and seams in the pipe pile watertight. Unless otherwise indicated by the contract, the ends of pipe pile may be flame cut. Square flame cut ends with axis of the pile to provide a full uniform bearing over the entire end area when the pile is being driven. Welding procedure qualification for AWS D1.1 is required for pipe piles requiring splicing. The welding shall be performed by a Department certified welder.

For permanent applications, use hot rolled steel sheet piles and meet ASTM A572 or ASTM A690 unless otherwise required by the plans.