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• <br />H <br />ROOF SUPPORT MATERIALS - All components of the roof bolt assembly <br />shall comply with the American National Standards Institute "Speci- <br />fications for Roof Bolting Materials in Coal Mines." (ASTM F432-78) <br />ROOF BOLTS <br />Manufacturer Stratabolt Corp, <br />Minimum Length 72" Overall - <br />Type Steel Hiah Strength <br />Length of Thread 4" <br />Dimensions of Bolt Head: Nut <br />I. BEARING PLATES <br />Manufacturer Listed on Paae 4 <br />Manufacturer's Desiqnation <br />Din~ensions Listen on Paae 4 <br />• <br />Center <br />Shape Hole Size <br />(Donut Embossed, Bell Embossed, Flat) <br />J. WASHERS Manufacturer's <br />Manufacturer Same as Roof Bolts Designation, <br />and Bearing Plates. <br />*Type Steel Hardened Size 2" X 1/B" <br />*Washers shall be throsoh hardener tc c h~roneSS of 35 to ~5 as <br />measured on the Rockwell C Scale. <br />Shape Round - Flat Hole Size 13/16" <br />K. ANCHORAGE UNIT Manufacturer's <br />Manufacturer Stratabolt Corp, Designation 2' Min, Grouting <br />• <br />Type No. 6 Rebar <br />Installed Torque <br />Size of Finished Hole <br />120-160 ft./lbs. <br />Manufacturer's <br />Desiqnation Point Anchor Bolts <br />Diameter- <br />Type Thread <br />Rolled <br />Type Head Standard <br />(Standard, Self-centering, Cone Neck) <br />I 1/°" Flange <br />5/8" <br />1" <br />Page Four 8 <br />Added 02/04/83 <br />