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11/11/97 11.09 <br />10/2"L/1997 15:11 151083r~ <br />HacleQda Buairtesg park <br />Plaasaaton, CA <br />October 22,1997 <br />Page 2 <br />DaLE GREEN aSS~ <br />ND. 881 D1 ~• <br />PAGE 82 <br />Structural design of rho bridgc will be pcrfotmed by or under the supervision of a Proles:ions! <br />Eagisieer registered is the State of California, with si~aed sad waled shop drawings submittcd <br />for approval ptlor to fabricadon. <br />Wo are providing stay-in-place form decking to accept a concrete deck on this structure in <br />aoao:da:tce with the ipeeiflaatloaa aadlor the contzset docutaertt:. Be swats that stoat pedestrian <br />bridge liability cliltt~ are sut4dcally slip sad fall claims. It is the owtzars and/or the cor-cretc <br />installers responaibiHty t+o pr4vida a son-skid finish oa the concrete deck. We recommend, as a <br />er-inirau:a, a rovahet3ed •botoom 8ttisb be used on all deck surficas. <br />The blddge shall be desiQntd in accotdartca with the "Manual of Steel Construction: Allowable <br />Stress Design," as adapted by the A:aericaa Inrtitute of 3tce1 Construction (RISC) - 9th edition. <br />Welded tubular cotutecdoo design shall be itf aaoordanca with the 3tntctutal Weldlna Codc <br />(ANSUAW$ D1.1). <br />Field splicoa shall be fully bolted with ASTM A32S type 3 high atrcngtb bolts in accordance with <br />"Spoclfioatioas for 9tntctural Joints Using A5TM A3Z5 or A490 bolts." <br />Bridgo structures shall be fabricated by a fabricator wl~to is currently certified by the American <br />Institute of 3tesi Construction to have the petsotsaal, orgaazisation, experionce, capability, and <br />commitment to produce fabricated stcttctural siMl for gimplo Steel, Bridge Structuues as set forth <br />in the AI3C Certltlcation Prog>nurt. <br />Ali unpainted fabtiestlona will be produced i~om high atrongth, !ow alloy, atmospheric <br />corrosion resistant ASTM A8d7 sold-foamed waldod square sad cectanIIular tubing, and ASTM <br />As88, ASTM A606, or ASTM A242 plate tad strueturaJ shapaa with a minimum corrosion index <br />of S .6 per ASTM C31 d l . <br />All expacd avrfeces of steel shall be blast cleaned la aecordattce with Steal 3ttvctures painting <br />Council 9urtboe Preparation 3peei8aadoas No, 7 Bwh-OffBlut Cleaning, S3PC-9P7-latest <br />edition. Exposed sut$ces of steal shall be deflnod as those surfaces xea from the dick artd from <br />outsldt t}te structure. Stringers, floor beams, loner brava diagonals surd the inside face of the <br />trwa below the deck and bottom of the bottom chord shall not be blasted. <br />DelivezY is made to a location nearest the site which is easily aoaessible to noratai over-the•road <br />tractorhrailer equipment. You will goad equipment to unload the bridge section from our truck at <br />the-bate of arrival. This bridge will ba delivered ~ two seetiow utilizing field bolted splice <br />conneetlons. 'I'h~ apprvximatz Wtal U;[ti.,g wai~hl ut dte Ixld~e !s 29,021 lbs. <br />This proposal considers the following pcoeedtuns for welding, fnspection, and testing. This <br />proposal will need to be modified ff there are additional requirements of the project affecting <br />design. tr~atarials, fabriaatioa mathoda, testing, iaapcetion, and/or procedures due to applieatien <br />