499 ALASKA 2020 SECTION 714 PRESERVATIVES FOR TI MBER
714-2.01 PRESERVATIV ES. Pressure treat all timber that is exposed to weather, water, or soil
to AASHTO M 133 or the AWPA Standards, using preservatives registered by the US Environ mental Protection Agency.
1.Timber . Use the preservatives and treatment processes of AASHTO M133, and if in aquatic enviroments, and Best Management Practices for the Use of Treated Wood in Aquatic Environments (BMPs), published by the Western Wood Preservers Institute, 12503 SE Mill Plain Blvd., #205, Vancouver, WA 98684 (Phone: 360 -693-9958). Treat products according to AWPA Standard U1, Commodity Specification A: Sawn Products for soil and freshwater applications meeting Use Category 4B.
2.Glued- Lamin ated Timber . Treat products according to AWPA Standard U1, Commodity Specification F: Wood Composites. Use preservatives for soil and freshwater applications meeting Use Category 4B.
3.Timber Piling. Treat products according to AWPA Standard U1, Commodity Specification E: Round Timber Piling. Use Category 4B for soil and freshwater contact. Marine piling products shall be treated according to AWPA Standard U1, Commodity Specification G: Marine (Salt Water) Applications. Use Category 5A for salt water applic ation.
4.Lumber. Pressure treat all lumber in accordance with AWPA Standards or according to AASHTO M 133. 500 ALASKA 2020 SECTION 715 STEEL FOR PILES
715-2.01 SCOPE. Steel used for Structural Steel Piling and Sheet Piling.
715-2.02 GENERAL REQ UIREMENTS. Furnish steel piles of the dimensions, weights, cross -
sections, and grades specified. Satisfy the impact test requirements of Subsection 716- 2.02. Meet the following:
1.Structural Steel HP Piling . Furnish HP shape piles meeting ASTM A709, Grade 50T3.
2.Structural Steel Pi pe Piling . Furnish pipe piles meeting one of the following:
a.American Petroleum Institute (API) 5L X52 PSL2 with one longitudinal seam.
b.ASTM A709, Grade 50T3 with one longitudinal seam fabricated and monogrammed according to API 2B.
c.ASTM A709, Grade 50T3 fabricated according to the follow ing:
1.General . Fabricate single seam helical weld pipe piling from coiled skelp. Use skelp material that does not contain repair welds. Use skelp having a width not less than 0.8 times the outside diameter of the pipe and n ot greater than 3.0 times the outside diameter of the pipe. Form pipe when the steel temperature is below 400°F. Locate junctions of skelp end welds and the helical seam welds at distances greater than 1.0 times the outside diameter of the pipe from the pi pe ends and at distances greater than 5.0 times the outside diameter of the pipe from other junctions of skelp end welds and helical seam welds.
2.Welding. Use complete joint penetration welds produced by the automatic submerged– arc welding process, the automatic gas metal -arc welding process, or a combination of both processes. Perform welding according to Section 504.
3.Welding Inspection. Perform welding inspection according to AWS D1.1. Provide 100% visual inspection of welds on the inside and outside surfaces of the pipe.
4.Non- Destructive Examination. Randomly examine 10% of the total length of helical seam welds and skelp end welds. Examine welds by performing one of the following tests:
a.Radiographic testing according to the requirements of AWS D1.1 Section 6, Part E with Subsection 6.12.3 of AWS D1.1.
b.Ultrasonic testing according to the requirements of AWS D1.1 Section 6, Part F with Subsection 6.13.3.1 of AWS D1.1. If more than 10% of the weld lengths examined are defective, examine a second random sampl e of 25% of the total length of welds. If more than 10% of the weld length examined in the second sample are defective, examine 100% of the total length of welds. Repair all weld defects in accordance with AWS D1.1.
5.Destructive Examination. Perform destructive examination on specimens from finished pipe of each specified outside diameter, wall thickness, steel type, heat, and grade. Examine specimens at a frequency of at least one set of tests for each lot representing 2000 linear feet of finished pipe or once per week during each
Source: Alaska Standard Specifications for Highway Construction, 2020 Edition. Pages 527–527 of 584.