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 serrated 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