3462Plank for Wearing Course

3462.1SCOPE

Provide lumber for use as plank for wearing course on Bridges.

3462.2REQUIREMENTS

Refer to ASTM D9, Standard Terminology Relating to Wood and Wood-Based Products, for the definition of terms and provide plank made from any of the following species: Douglas Fir, Norway (Red) Pine, Ponderosa Pine, White Pine, Southern (Yellow) Pine, Northern White Poplar. Provide plank meeting the following characteristics and requirements:

shakes, splits, any incipient decay, unsound, loose or decayed knots, and ant o r worm holes

any individual plank Surface planks with heart center appearing on one side, on the heart side. For any one Bridge, provide planks of the same thickness of at least 1 1/2 inch after surfacing.

For any one Bridge, the Contractor may provide planks with Nominal widths of 6 inches, 8 inches, or both. Ensure the widths after surfacing are at least 5 1/2 inches for planks with a Nominal width of 6 inches and 7 1/4 inches for planks with a Nominal width of 8 inches. Provide planks of each Nominal width for any one Bridge with the same actual width. If the Contract requires treated plank, provide planks treated with preservative in accordance with 3491, “Preservatives and Preservative Treatment of Wood Products. ”