The Power-Rack Stanchion is the new alternative to traditional iron cable stanchions used for utility and industrial cable supports. Made entirely from glass-reinforced nylon, these stanchions out-perform metallic supports against corrosion. The extended life-span of the Power-Rack Stanchions makes them the logical choice over metallic cable supports. The Power-Rack Stanchion is available in two different lengths and four different arm lengths. The unique interlocking design allows the arm to "lock" into nine different levels on the 14-1/4" stanchions and fourteen on the 17-1/2" stanchion. Glass-reinforced polyurethane stanchions are available as a special order. Contact the factory for pricing and availability. Dimensions - The stanchion back is designed with 9/16" wide x 15/16" long holes to accept fasteners for mounting. There are two mounting holes in the 21-3/8" long stanchion and three mounting holes in the 33-5/16" long stanchion. Thickness at the slotted mounting holes is 1-7/8". The mounting holes are spaced on 12" centers and require 1/2" diameter fasteners. Installation - The Power-Rack Stanchions can be anchored into existing concrete structures using any good quality industrial anchoring system. For new concrete structures, the Power-Rack Stanchions can be mounted to Aickinstrut concrete embedment channel and attached with 1/2" channel nuts and 1/2"x 3" Fiberfast Bolts. Fire Retardance - Power-Rack materials meet or exceed the requirements of UL94 HB. Loading - The recommended allowable loads on Power-Rack Stanchions vary depending upon the position of the arm. Following the guidelines listed below will ensure a safe, reliable installation. - Total load on any one arm should not exceed 800 lbs. - The sum of the loads on any arm multiplied by their distances to the wall stanchion should not exceed 1200 in./lbs. Example - A cable weighing 200 lbs. is positioned on an arm at a distance of 5" from the wall stanchion. If the total load is less than 800 lbs and the sum of the load multiplied by their distances to the wall stanchion does not exceed 1200 in./lbs., then the system is adequate. In this case, Total load (200<800 lbs) = OK Tot. moment (200x5 in. = 1000<1200 in./lbs.) = OK *Design load values shown represent a 3:1 safety factor.