Hook Bolts

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HOOK BOLTS Hook bolts are very commonly used to attach lighter rails (usually up to 85 lbs.) to channels (as shown at left) or directly onto a crane rail beam. They are usually threaded to allow up to one half inch lateral adjustment in either direction, and come complete with hex nuts and lockwashers. When ordering, specify rail section, bolt diameter, and the size and weight of supporting beam or channel. Hook bolts are typically drilled in pairs four inches apart every two feet. Unless otherwise specified, we drill these holes 1/8 inch larger than the diameter of the hook bolt, and the spacing will be as shown in the table below. Typically the hook bolts are the same diameter as that used for the splice bars. (Hole elevation is the same as for splice bar holes.) B C A C B D E Remaining holes on 24" centers E D Hook Bolt Spacing * Rail Weight 12 lb to 60 lb 12 lb to 60 lb 25 lb to 60 lb 60 lb to 80 lb 80 lb to 85 lb A 20' 30' 40' 33' 39' B 14" 14" 14" 18" 18" C 22" 22" 22" 24" 24" D 12" 12" 12" 16" 16" E 4" 4" 4" 4" 4" No. holes per rail 20 30 40 32 38 *See pages I-5 thru I-12 for rail end drilling. www.HarmerSteel.com sales@harmersteel.com © 2007 (503) 286-3691 FAX (503) 286-2097 III – 1