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Roll Formed Z-Channels are commonly used as Framing, Supports, Reinforcements, Stiffeners for PVC-Rails, Slides, Tracks, and many other uses. They are used in many industries, such as: Construction, Mezzanines, Metal Buildings, Garage Doors, Fences, PVC-Door & Window Frames, Displays & Store Fixtures, Tool Boxes, Metal Furniture, Enclosures, Cabinets, Storage Bins, Racks, among many other industries. Z-Bar, Z-Channel, Zee, & Purlin are all terms that describe the same type of Profile.
When there are returns at the top of each leg tooling will usually need to be produced unless its for a size we already have dies made for. For Zees with a small Web between the Legs, new dies may also be needed, although these dies are not as expensive as dies for Zees with longer Webs. With high enough volume, dies may be donated, as well. Purlins have returns that are bent inward at the top of each leg with a wider Web than the Legs are long. They are very common in the Framing and Metal Buildings Industries. Zees can have these same inward flanges but usually do not. They are not usually called Purlins when they are used in other industries. Some Zees and Purlins can be so wide that they are considered to be Panels. Purlins are typically Prefinished with Galvanized or another rust inhibiting coating and can be made in all metals, including Aluminum and Stainless Steel.
In the early 1980's, Johnson Bros. produced Z-Channels for building sized parabolic satellite antenna receiving station discs, used around the world. They were made from 6061-T4 age hardening Aluminum. Two sizes of Purlins had to be bent with a sweep in the hard direction, for 16 different radii, that made up the frame of the dish. Zees can be this complex, or without inward Flanges that are very basic, plain, steel, display supports.
Inline fabricating such as sweep bending and cutting to finished lengths are available, as well as: Holes, Slots, Embossing, End Fabrications, Shear Forms, Perforating, Cutouts, K/O's, Ring Bending, and many others. Finished lengths can be as short as 4? or as long as 40 feet. Thicknesses can be as thin as .003? or as thick as .125?. Prefinishes available are: Galvanized-(G30, G60, G90, G210, Electro, Bonderized, Smooth Brite), Prepainted, Preplated, Preanodized, Prepolished, Strippable-PVC Coated, Prelaquered, Prelaminated Vinyl, Aluminized, Galvanneal, Galvalume and more.
Materials used are: Steel, Stainless, Galvanized, Aluminum, Clad, High Strength, Brass, Bronze, Copper, Alloys, Wire Cloth, Expanded Metals, Foil, Embossed and Perforated among others.