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3. Written certificates stating quality, type, grade, and origin of all materials <br />shall be delivered to the Owner's Representative before the material is used <br />on the site. Specific certification of the moisture content for all lumber after <br />preservative treatment will be required to be delivered to the Owner's <br />Representative before the material is used on site. <br />4. All woodwork shall be clearly stamped with the grade required. Grade <br />markings for exposed wood shall be placed on a concealed surface. <br />Lumber delivered to the site shall be carefully piled off the ground in such a manner as to <br />insure proper drainage, ventilation, and protection from the weather. <br />A. Redwood: Redwood shall be free of knots and shall conform to the grades <br />certified by California Redwood Association in accordance with the <br />following: <br />1. Construction Heart: N/A. <br />2. Merchantable: Cladding components. <br />B. Hardware: All nails, screws, and miscellaneous fittings shall be hot dipped, <br />galvanized steel, unless noted otherwise (stainless steel and aluminum alloy <br />acceptable. Bolts shall be hot dipped galvanized. <br />Contractor shall be responsible for all necessary field measurements at the construction site <br />after locations, orientations, and elevations have been established by City. All carpentry <br />work shall be accurately fitted, vertical work shall be accurately fitted, vertical members <br />installed plumb and evenly spaced, and end cuts made clean and square. <br />Contractor shall install cladding mockup on one panel (two posts) for approval prior to <br />ordering material. <br />Add new sections as follows: <br />23-01J Potholing <br />Should USA markings identify utilities within the pier locations, contractor shall pothole <br />the facility to determine horizontal and vertical locations of existing underground facilities <br />that may impact final placement of proposed improvements. <br />Any potholes in sidewalks or in the street shall be temporarily backfilled and capped with <br />cutback. <br />Valley Avenue Soundwall Repair Project (REBID), CIP No. 18437 <br />Page 60 <br />