Why is zinc used for Unistrut?
Rust can play a big part within a Unistrut application. Selecting the channel or fittings that are zinc coated is an easy way to minimize corrosion associated with outdoor applications as well as corrosive inside environments.
Will galvanized strut rust?
Hot-Dip Galvanized reached 5% red rust at an average of 898 hours. 5 of 6 samples still active at 3,000 hours! With over 3 times the corrosion protection of Hot-Dip Galvanized products, the anticipated service life for Unistrut Defender vastly outperforms traditional carbon steel framing systems.
Does Unistrut come galvanized?
Most Unistrut Channel is available in Plain Carbon Steel, Perma-Green, or Pre-Galvanized finish. Other options include hot-dipped galvanized and special metals (aluminum and Type 304 & 316 stainless steel).
What is green strut used for?
Green coated strut provides superior resistance to chalking, checking, and fading. Due to the coating’s corrosion resistance, green coated strut is used in applications with exposure to common acidic atmospheres, solvents, and alkalis. The green coating contains no toxic metals.
Can Unistrut be painted?
Pre-Galvanized and Hot Dip Galvanized Unistrut are ideal for applications requiring corrosion resistance. Although the factory finish is perfectly acceptable for most applications, there are also situations where painting with a custom color is needed to add a finishing touch.
What is zD finish?
PERMA-GOLD™ (zD)– Industry Standard yellow Dichromate. The high quality Perma-Gold finish is a zinc dichromate finish applied over an electro-galvanized zinc plating and is totally compatible with the aesthetics and performance of yellow dichromate finishes used on other brands of metal framing.
Are zinc and galvanized compatible?
Zincalume is an alloy of aluminium and zinc, which are adjacent to each other on the galvanic table. They are, as can be expected, compatible in contact. On a galvanised surface, the carbonic acid will react with the zinc and become neutral.
How much weight can a piece of Unistrut hold?
Beam Loading – Unistrut P1000 – 1-5/8″ x 1-5/8″, 12 Gauge Metal Framing Channel
| Span (in) | Max Allowable Uniform Load (lbs) | Uniform Loading at Deflection |
|---|---|---|
| Span /240 (lbs) | ||
| 36 | 1,130 | 1,130 |
| 48 | 850 | 760 |
| 60 | 680 | 480 |
What is pre galvanized Unistrut?
Pregalvanized Unistrut is zinc coated during a hot dip process for added corrosion resistance. Steel strip from a coil is fed through a continuous zinc coater that cleans, fluxes and coats the steel with molten zinc. This time-tested coating is good for indoor and outdoor applications.
Can you paint zinc?
Painting zinc is not really tricky. When painting zinc, you follow the same rules as painting galvanized surfaces. A phosphoric acid activated vinyl wash primer is also an excellent pretreatment for zinc surfaces. Organic zinc rich primers have been used successfully on zinc surfaces.
What kind of zinc is used in Unistrut?
Pregalvanized Zinc (PG) — This coating is a well-proven, time tested performer for indoor and outdoor applications required a moderate amount of corrosion resistance. Please Note: We also offer volume discounts on larger orders. Please contact Unistrut Service Company for a custom quote on your bulk order. Cut to a Custom Length?
How does Unistrut channel and fittings finish work?
For more corrosive environments, the next step up in finish protection is our hot dip galvanized Unistrut channel and fittings. In hot-dip galvanizing, the finished part is immersed in a bath of molten zinc. This method produces complete zinc coverage and a thicker coating than pregalvanized or plated zinc.
Which is better hot dip galvanized or plated Unistrut?
Hot Dip Galvanized Unistrut (HG) ASTM A123 or A153 In hot-dip galvanizing, the finished part is immersed in a bath of molten zinc. This method produces complete zinc coverage and a thicker coating than pregalvanized or plated zinc. The zinc coating is typically 2.6 MIL or 1.5 oz./sq. ft. of surface area.
What kind of steel are Unistrut fittings made of?
Unistrut Service Company offers the resources you need to take your project from the drawing board to successful completion. To ensure maximum durability and quality, Unistrut fittings are made from hot-rolled, pickled and oiled steel plates, bar, strip or coil. All fittings meet or exceed physical properties of ASTM A1011 GR 33.