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RDDF SUPPU~:T I•;ti7ERIALS - All components of the roof boll assembly <br />shall comply with the American National Standards Institute "Spec- <br />ifications for Roof Bolting Materials in Coal Mines." <br />H. RDDF BDLTS CF&I Steel Cor Manufacturer's <br />• Manufacturer P• Designation 5772-1228-7-1 <br />Bethlehem Steel Co. 23-9,10 <br />Kaiser N/A <br />Minimum Length 30" Diameter 5/8" <br />F43 - Grade 5 -_ <br />Type Steel A306 Grade 80 {Bethlehem) Type Thread Rolled <br />Length of Thread 8" Min Type Head Standard <br />(Standard, Self-centering, Lone Neck <br />Dimensions of Bolt Head: Nut 1-1/$'~lange 1-1/2" <br />I. BEAP,ING PLATES Manufacturer's <br />h~anufacturer Gate City Steel Designation N/A. <br />Bethlehem Steel Co. 24-9,913 <br />Union Forge ASTM X432 <br />pimensions 6" X 6" X 1/4" (Gate City & Bethlehem) <br />neon orge <br />Center <br />Shape Donut Embossed Hole Size 3/4" (BSC & UF) <br />Donut Embossed, Bell Embossed, flat) <br />( J. WASHERS 1~,anufacturer's <br />Manufacturer Designation <br />*Type Steel Hardened Size <br />*Washers sha 1 be through hardened to a hardness of 35 to 45 as <br />measured on the Rockwel] C Scale. <br />Shape Hole Siz <br />ANCHORAGE UNIT Panufacturer's <br />Manufacturer Pattin Corp. D-1 Designation 5792-0121-5-1 <br />Bethlehem Steel Co. C-1,K,K-3 25-64,68 176,80 <br />Ohio Brass Co. 22463 <br />Size +.03D" <br />Type Expansion Finishing Bit 1-3/8" <br />Finishing bits shall be easily identifiable by sight or fee <br />Installed Torque 150 ft.-lb. <br />MA7ERIALS USED IN CONJUNCTIDN WITH RDDF B0175 <br />6" X 16" X 3/16" Half Headers (Steel) Pattin Mfg. Co. <br />Steel Roof Mats <br />. Prior approval shall be obtained before making any changes in the mater- <br />ial listed. <br />