Paint Line: A conveyor system which runs through a manufacturing plant that rack product hangs on to be washed, sprayed and baked for a final paint finish.
Pallet Back Stop Beam: A special offset beam which sits behind the bay in the flue space to stop pallets from being pushed into the bay behind.
Pins: (studs) Metal studs on the ends of the beam clips that insert in the upright keyholes to secure the beam.
Pipe Holder: An accessory that attaches to an upright to hold pipe, conduit or other long, light weight product stand vertically.
Plumbness: The closeness of an upright or column to being vertical. Uprights should not be out more than 1/2î per 10í–0î of vertical height.
Point Load: (concentrated load) A load which bears on a small area of a beam rather than being distributed through out the pair of beams.
ex. A pallet loaded in the center of a bay can cause a de crease in the capacity of beams.
Post: (column) Roll formed post section with key holes used to make an upright.
Post Cap: (adjustable post cap) The removable top of the adjustable VPD which attaches the cut post to the beam above.
Post Extension: A single post that attaches to the front column of an existing upright with a splice plate to allow for signage display or accessory attachment.
Pre-galvanized: Steel that has been pretreated chemically with zinc for weather resistance.
Powder Coat: A paint application method which sprays paint in the form of powder on the rack parts. Parts then run through an oven which melts the powder, turning it to a liquid and the heat then bonds the paint to the upright. A durable finish.
PSI: A reading of pressure or stress in the testing of steel. Pounds per Square Inch.
Push Back: A special racking system with nesting carts. As a pallet is loaded from the front, it pushes the pallet behind it back one position. To unload, the front pallet is removed and the rear pallets come forward to the picking position, automatically.
Rack: A system of beams and uprights which form heavy duty shelving for pallets and other product.
Rail: (l-rail) A metal bracket in the shape of an ìLî which attaches to an upright and an intermediate post (VPD) to segregate a bay with different size shelves. L-rails attach with two tabs at either end and require no hardware. Decking is placed on the L-rails to make a shelf.
Retainer Brackets: (fence retainer) An accessory which attaches over a beam and provides a stop for long length product that is stored horizontally on the shelf.
RMI: Rack Manufacturerís Institute. Membership as sumes compliance with manufacturing and design to a strict set of standards. A set of standards is published and may be obtained by contacting the RMI.
Rockwell Readings: A value determined by testing that rates the hardness of metals. A higher rockwell number in dicates a higher surface hardness.
Row Spacer: (rigid row spacer) A lateral tie from upright to upright in a back to back rack set up.
Run: A row of rack. Multiple bays in a line.
Safety Back stop: (safety column, pallet backstop) A post used vertically to stop pallets from falling or being pushed into aisles behind. Attached to the rack with brackets.
Seismic Base Plate: A base plate that is required to be larger in certain areas of the country which have a history of earthquakes.
Seismic Calcs: A set of documents which illustrate how the racking system conforms to special conditions imposed on areas of the country which have a history of earthquakes.
Shear: Tendency to deform or fracture as two members slide against each other.
Shims: (shim plates) Metal plates which nest together to slide under the baseplates on uprights to level the rack due to uneven floors.
Side Holes: (side punching) The square holes on the sides of the upright columns to bolt beams and accessories through.
Simply Supported Span: A span which neglects end restraint offered by the connectors. A capacity calculation that does not take end fixity into ac count.
Skid: Steel or wood, movable unit – Load.
Splice Channel: (splice kit) A channel that fits inside the upright and an extender or post that is attached on top. Splice channels must be bolted above and below splice.
Spray Paint: (touch up paint) 12 cans to a case.
Step: Area of a beam which the wood stickers or wire decking rest upon (ledge).
Stickers: Wooden lumber that is placed on the beam steps to form a shelf.
Sticker Spacers: (wooden sticker spacer strips) A metal band with relief areas for wood to nest to separate wooden decking. Spaces wood so that water can flow through in he event of a fire.
Studs: (pins) Metal rivets that hang inside the keyholes to align the beam in the upright and stay secure
T-bolt: A bolt that has a long end which inserts into the upright front hole and rotates 90 degrees to lock a beam or row spacer to the upright. A t-bolt installation does not require reaching into the column.
Teardrop: (keyhole) The punched holes in the shape of a tear drop that are on the face of inter changeable uprights for beams to attach to. Each pair of holes is 2î on vertical center.
Tek Screw: A screw that is drilled into the rack to secure accessories. A tek screw should not re place a connection that requires a bolt.
Tensile Strength: A value determined through destructive testing at which a material will fail when being pulled from each end. Tensile Strength is an important property considered when ordering steel.
Thickness of Steel: A decimal measurement of steel taken with a Micrometer.
Tolerance: Fractional variation allowed during man ufacturing and installation processes.
Ton: Unit of weight measurement equal to 2,000 pounds.
Tool Holder: A bracket which has two square tubular arms welded to the front, angled upward to hold tools with long handles. One arm is shorter than the other to allow a slot to slide the tools on.
Uniform Load: A load on a pair of beams sup ported by all, or nearly all of the beam surface.
Unsupported Length: Measurement of the dis tance between the floor and the top of the first beam or the maximum spacing between beams – whichever is greater.
Uprights: (frames) The vertical member of the rack system which beams lock into. Consists of two columns and welded bracing.
V-Divider: Tubing in the shape of a ìVî that has a bracket on either end that attaches to a pair of beams. The ìVî hangs below the beams to separate large merchan dise such as windows.
V-Rack: (fan rack) A special upright with a tall, double post in the rear and a shorter post in the front. A special top section attaches to hold channel beams which sup port fans and light fixtures.
VPD: (Vertical Post Divider) The vertical member used to segregate different size product within a bay without adding beam levels. Post attaches to beam above and rests on beam below. L-rails are installed in the side punching of the VPD to create shelves.
Wall Tie: A rigid metal strip with a plate on one end which attaches racking which is prone to over turning to a concrete wall unit. Before adding wall ties to a system, an engineer should be consulted.
Wedge Anchor: A special, removable bolt used to fasten uprights to the floor.
Weed Wacker Holder: A square tube with a bracket on one end that attaches over the beam. The opposite end of the tube has a bent wire piece which can cradle a weed eater for display.
Weld: The application of heat and gases to fuse two pieces of metal together.
Whiz Bolt: (whiz nut) A bolt or nut with a serated flat section that grips the surface it is being attached to.
Wind Load: Added force on a rack system caused by wind.
Wire Decking: Grids of wire welded together that rest on the steps of the beams to form a shelf.
Wood Decking: (stickers) Wooden boards which rest on a pair of beams and form a shelf.
Wood Spacer Strips: (sticker spacers) A metal band with relief areas for wood to nest into for separation of wooden decking. Spaces stickers so that water can flow through in the event of fire.
Yield: The point at which a piece of steel is stretched and will not return to its original size. The point at which an overloaded component will take a permanent set.
Zinc: Metallic coating applied to racking components to add weather resistance. (galvanizing)
Zones: (seismic, earthquake zones) A reference to certain areas of the country with different seismic activity. ex. Zone 1 – Least amount of seismic activity Zone 4: Greatest amount of seismic activity
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