Permits & Development - Encroachment(EP)/Driveway(DW) Permits - 2007_EP-07-301 thru EP-07-400_ - EP-07-352

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• Ribbed sheet metal for box beam-closed truss sign structures shall be fabricated from galvanized sheet steel conforming to the requirements in ASTM Designation: A 653/A 653M,Designation SS,Grade 33[230]. Sheet metal panels shall be G 165 coating designation in conformance with the requirements in ASTM Designation: A 653/A 653M. Section 56-1.02F,"Steel Walkway Gratings,"of the Standard Specifications is amended to read: 56-1.02F Steel Walkway Gratings • Steel walkway gratings shall be furnished and installed in conformance with the details shown on the plans and the following provisions: A. Gratings shall be the standard product of an established grating manufacturer. B. Material for gratings shall be structural steel conforming to the requirements in ASTM Designation: A 1011/A 1011 M,Designation CS,Type B. C. For welded type gratings, each joint shall be full resistance welded under pressure,to provide a sound, completely beaded joint. D. For mechanically locked gratings, the method of fabrication and interlocking of the members shall be approved by the Engineer,and the fabricated grating shall be equal in strength to the welded type. E. Gratings shall be accurately fabricated and free from warps, twists, or other defects affecting their appearance or serviceability. Ends of all rectangular panels shall be square. The tops of the bearing bars and cross members shall be in the same plane. Gratings distorted by the galvanizing process shall be straightened. The fifth paragraph in Section 56-1.03,"Fabrication,"of the Standard Specifications is amended to read: • Clips, eyes, or removable brackets shall be affixed to all signs and all posts and shall be used to secure the sign during shipping and for lifting and moving during erection as necessary to prevent damage to the finished galvanized or painted surfaces. Brackets on tubular sign structures shall be removed after erection. Details of the devices shall be shown on the working drawings. The sixth through the thirteenth paragraphs in Section 56-1.03, "Fabrication," of the Standard Specifications are amended to read: • High-strength bolted connections, where shown on the plans, shall conform to the provisions in Section 55-3.14, "Bolted Connections," except that only fastener assemblies consisting of a high-strength bolt, nut, hardened washer, and direct tension indicator shall be used. • High-strength fastener assemblies, and any other bolts, nuts, and washers attached to sign structures shall be zinc- coated by the mechanical deposition process. • Nuts for high-strength bolts designated as snug-tight shall not be lubricated. • An alternating snugging and tensioning pattern for anchor bolts and high-strength bolted splices shall be used. Once tensioned,high-strength fastener components and direct tension indicators shall not be reused. • For bolt diameters less than 10 mm, the diameter of the bolt hole shall be not more than 0.80-mm larger than the nominal bolt diameter. For bolt diameters greater than or equal to 10 mm, the diameter of the bolt hole shall be not more than 1.6 mm larger than the nominal bolt diameter. • Sign structures shall be fabricated into the largest practical sections prior to galvanizing. • Ribbed sheet metal panels for box beam closed truss sign structures shall be fastened to the truss members by cap screws or bolts as shown on the plans,or by 4.76 mm stainless steel blind rivets conforming to Industrial Fasteners Institute, Standard IFI-114, Grade 51. The outside diameter of the large flange rivet head shall be not less than 15.88 mm in diameter. Web splices in ribbed sheet metal panels may be made with similar type blind rivets of a size suitable for the thickness of material being connected. • Spalling or chipping of concrete structures shall be repaired by the Contractor at the Contractor's expense. • Overhead sign supports shall have an aluminum identification plate permanently attached near the base, adjacent to the traffic side on one of the vertical posts, using either stainless steel rivets or stainless steel screws. As a minimum, the information on the plate shall include the name of the manufacturer,the date of manufacture and the contract number. The fifth paragraph of Section 56-2.02B, "Wood Posts,"of the Standard Specifications is amended to read: • Douglas fir and Hem-Fir posts shall be treated in conformance with the provisions in Section 58, "Preservative Treatment of Lumber, Timber and Piling," and in conformance with AWPA Use Category System: UC4A, Commodity Specification A. Posts shall be incised and the minimum retention of preservative shall be as specified in AWPA Standards. Contract No. 10-OM7104 47