International Door & Operator Industry

JAN-FEB 2018

Garage door industry magazine for garage door dealers, garage door manufacturers, garage door distributors, garage door installers, loading docks, garage door operators and openers, gates, and tools for the door industry.

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APPLICATION: Edge-of-Dock levelers, (EODs), are an inexpensive and efficient means to "bridge the gap" between the shipping/receiving dock and the trucks/trailers servicing the dock. They install on the dock face, therefore, the opening or closing of the garage door is not effected by the position of the EOD. They automatically return to the stored position when the truck departs so no manual recycling is required. However, they have a limited service range of (5"+/- ), for forklift operation and (2-3"), for pallet jack use. Therefore, when quoting an EOD it is important to know the customer's intended use of the product. EODs are acceptable for the following applications: 1. Dock height of 48-50" & dry van trailers at 46-52" off ground 2. Dock height of 52-54" & refrigerated trailers at 52-56" off ground • Never plan to use EODs if the service range needed is at or near the maximum. • Never plan to use EODs on a standard dock height if servicing ocean containers. INSTALLATION: New Construction: The most dependable installation is a "weld-on" installation using an embedded "C" Channel at the dock edge. The EOD and the bumpers are welded to the face of the "C" Channel which should be at least 8" x 11.5 lbs/ft. x 120". (Shorter lengths may not be sufficient for fully welding the bumpers when wider EODs are being installed). Other structural steel such as 6" "C" channel or 4" x 6" angle may be used. However, some bolting will be required since welding alone will not be sufficient to properly anchor the EOD. Installing the EOD: An EOD has three major plate sections: • Base Plate that anchors to the dock. • Center Plate that rest horizontally on the gussets. • Lip Plate that hangs pendent at the front of the EOD between the bumpers. 1. When lifting the EOD into position for welding, use a properly sized chain or lifting strap. 2. Lift and swing the EOD into position at the dock face. • The normal weight of an EOD without the bumpers will be approximately 400-500 lbs. with larger and heavier capacity units weighing 600-700 lbs. 3. Hang the unit so that the base plate is facing the dock. 4. Position the top edge of the Base Plate ¼" below the top edge of the dock steel whether it is embedded steel or a surface mounted Approach Plate. • The ¼" dimension is an average since the Base Plate may be slightly bowed up at each end due to the heat from the factory welding of the hinge tubes to the plate. 5. Press the Base Plate tight against the dock steel and tack' weld at each end and once in the middle. • This ¼" below dock positioning will allow for a solid "fillit weld" along the top edge of the Base Plate. • It also lowers the rear hinge tubes in relation to floor level, reducing the slight bump created by the rear hinge. 6. Now tack weld the bumper housings in place at floor level. • Allow approximately ½" gap between the ends of the base plate and the bumper flanges. 7. Fully weld the EOD and the bump blocks to available steel. • If welding to an 8" channel, use the pre-punched holes in the Base Plate for securing the bottom edge of the Base Plate to the steel. No bolts are required in the lower two holes in the bumper housings even though they are below the 8" channel. • If the steel edge is less than an 8" channel and the holes in the base plate as well as the holes in the bumper housings fall below available steel, these holes must be bolted for proper installation. Minimum bolt size should be 5/8" x 4". Proper Adjustment: Most EODs are furnished with either torsion spring or extension spring lift assist. Manufacturers normally ship EODs without the springs adjusted to reduce the risk of injury to installation personnel. To maximize the ease of lifting, tighten the springs until the EOD center plate will float about 1" off the gussets when the Lip Plate is dropped from a horizontal position. As the Lip Plate swings in against the gussets, the center plate should raise slightly. Caution: Do not over tighten as this may cause the EOD to kick up under a forklift while exiting the trailer especially when deployed on a trailer that is several inches above the dock. Edge of Dock Application & Installation EOD with "C" Channel EOD with Angle TECHNICAL Note: Make sure the embedded steel and the concrete dock face are flush and vertically plumb, as this will affect the quality of the installation and the proper function of the EOD. Existing construction: Frequently, docks are poured with only a small steel angle cap at the dock edge. This may be sufficient for welding/bolting bumpers to the dock face but not for securely anchoring an EOD. To insure a quality installation, when these smaller steel angles are already in place, it is best to install an Approach Plate by bolting it to the dock floor so the EOD can be welded to it and the steel angle. 80 International Door & Operator Industry™ By Ned Jones, AaronBradley

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