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t , <br /> is <br /> 700-3 .4 . 5 Channels : For aluminum channels , meet the requirements of <br /> ASTM B 308 for the alloys shown in the plans . <br /> 700-3 .4 . 6 Bolts, Nuts , and Lockwashers : For aluminum bolts , nuts , and <br /> lockwashers , meet the requirements shown in the plans . Ensure that finished bolts and washers <br /> zs' are given an anodic coating of at least 0 . 0002 inch in thickness and are chromate- sealed. <br /> 700-3 . 5 Steel : <br /> 700-3 .5 . 1 General : Only use structural steel , including bolts , nuts, and washers , <br /> that have been hot dip galvanized or metalized after fabrication . Perform hot dip galvanizing in <br /> accordance with ASTM A 123 or ASTM A 153 and metalizing in accordance with Section 562 . <br /> For galvanized steel members meet the general requirements of Section 962 and the specific <br /> requirements of 9621,w9 . <br /> 700-3 . 5 .2 Specific Uses of Aluminum and Galvanized Steel : Use aluminum <br /> bolts , nuts , and hardware to connect parts of the cast base . <br /> Use galvanized steel anchor bolts for anchoring base plates to concrete <br /> bases and for the nuts and washers . <br /> For all other metal parts of the cast base, the Engineer will allow <br /> galvanized steel as an alternate to aluminum . <br /> 700-3 . 6 Bearing Pads : For bearing pads , meet the requirements of 932 -2 . <br /> 700-3 . 7 Retroretroreflective Sheeting : All retroreflective sheeting must be listed on the <br /> QPL and meet the retroreflective sheeting requirements of Section 994 . <br /> 700-3 . 8 Process Colors : Use transparent and black opaque process colors listed on the <br /> QPL meeting the requirements of 9944 on retroreflective and nonreflective sheeting. <br /> 700-3 .9 Electronic Display Signs : Use electronic display signs and mounting hardware <br /> that meet the requirements of the MSTCSD and are listed on the Department ' s Approved <br /> Products List. <br /> Use only new signs and mounting hardware . <br /> Provide signs marked in accordance with Section 603 and ensure the markings are <br /> visible after installation . <br /> Provide installation guides and operator ' s manuals for each EDS . Ensure the <br /> manuals include functional block diagrams and wiring diagrams ; with information required to <br /> operate, maintain, troubleshoot, and repair the EDS ; and with recommended maintenance and <br /> calibration procedures . <br /> Ensure signs have a manufacturer ' s warranty covering defects in assembly, <br /> fabrication, and materials for a minimum of three years from the date of final acceptance in <br /> accordance with 5 - 11 . Ensure Guaranties on EDS comply with Section 608 , <br /> 7004 Preparation of Sign Blanks . <br /> 7004 . 1 De-greasing and Etching for Aluminum Sign Blanks . <br /> 7004 . 1 . 1 General : Prior to the application of retroreflective sheeting, use any of <br /> the methods shown below to de- grease and etch the aluminum sign blanks . <br /> 7004 . 1 .2 Hand Method : Under this method, de- grease and etch the blanks in <br /> k <br /> one operation, using steel wool (medium grade) with any of the following combinations of <br /> materials : <br /> ( 1 ) An abrasive cleanser of a commercial grade kitchen scouring powder. <br /> (2) Acid and a suitable detergent solution . <br /> (3 ) An alkaline solution . <br /> - 186 - <br /> FPID ( S ) : 423186 - 1 - 5 8 -01 <br />