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TYPE <br />DESCRIPTION <br />Height of moldboard is to be minimum of 41" with an 8" cutting <br />edge. <br />Moldboard shall have minimum six vertical support ribs which are <br />to be flame cut,'/2" A36 steel, with a tensile strength of 58,000# - <br />80,000, equally spaced across the width of the moldboard. <br />The ribs are to taper from a minimum of 3.5" at the bottom <br />moldboard angle to 2" at the top moldboard angle <br />A %2" x 4" x 6" plate is to be welded to the four ribs where the push <br />frame attaches to the moldboard to provide a 1" bearing surface for <br />pins. <br />The non -spring horizontal support angles are to be 3" x 3" x'/4" <br />A36 steel angles. <br />The two spring support angles are to be 3" x 3" x'/z" A36 steel <br />angles. <br />Top moldboard angle is to be 2" x 3" x 3/8" A36 steel. <br />Bottom moldboard angle is to be 4" x 4" x 3/a" A36 steel. <br />Bottom moldboard angle is to have 11/16" holes punched to match <br />hole pattern of cutting edge. <br />There shall be I/z" thick gussets welded on each end of the inside of <br />the angle and midway between all punched holes. <br />Spring support/attachment plates are 3/4" A36 steel with 3 holes for <br />attaching compression spring arms at moldboard pitch settings of <br />either 20, 10 or 5 degrees. <br />Cutting edge shall be 5/8" x 8" blade made from 1080 steel with a <br />Rockwell "B" hardness of 93-100. The blade shall have standard <br />AASHO hole spacing and is to be top punched 1-1/2" from the top <br />edge to the center of the bolt. <br />Cutting edge is to be attached with 5/8" x 2-1/2" grade 8 plow bolts <br />Flow semi -circle is to be fabricated from 3-1/2" x 3-1/2" x '/2" A36 <br />30 <br />SHALL BE <br />AS <br />SPECIFIED <br />(Circle One) <br />