Sierra Pacific Industries 8/16/2020

CITY OF EVERETT CHAPLAIN BRIDGE INSTALLATION DETAILS,SPECIFICATIONS,AND REQUIREMENTS Specifications,current edition,Appendix A13.2. Traffic rail has not been physically crash-tested. 4.6.2 Traffic rail shall meet the force requirements for a TL-1 rating. 4.7 Other Loads 4.7.1 None 4.8 Combination of Loads 4.8.1 The load combinations and load factors to be used shall be as per specified in AASHTO LRFD Table 3.4.1-1. 5.0 STRUCTURAL DESIGN CRITERIA 5.1 Deflections 5.1.1 Per AASHTO LRFD Bridge Design Specifications,vehicle load deflection limits are not required. However,the Bridge Manufacturer will typically try to provide an anticipated vehicle load deflection of approximately L/500,expressed as the ratio of span length to deflection. 5.2 Fracture 5.2.1 The main beams shall meet CVN values of 20 ft-lbs @ 40-degrees Fahrenheit. 5.3 Wheel Load Distribution 5.3.1 Deck shall be designed to support the maximum wheel load from the design vehicle. 6.0 MATERIALS OF CONSTRUCTION 6.1 Structural Steel 6.1.1 For weathering steel bridges,all structural steel shall be ASTM A588. 6.2 Deck Material 6.2.1 Decking to be 4.25-inch Big R Steel Bridge Deck(or approved equivalent),7-gage, placed transverse across the width of the bridge. The height of the deck shall be 4.25" from top of the lower trough to top of the profile. Width of the plank shall be 12-13/16" with one 13/16"overlapping leg.Decking shall be manufactured from pre-galvanized steel,ASTM A653 Grade 50 Class with a minimum 2 oz galvanized coating,Fy=50 ksi. Decking is to be welded to top flange of stringers and to adjoining sheets. Welds to be treated with organic zinc-rich coating meeting the material and performance requirements of ASTM A 780(Standard Practice for Repair of Damaged and Uncoated Areas of Hot- Dip Galvanized Coatings). 6.3 Wearing Surface 6.3.1 Gravel