What are Unistrut Channels?
A Unistrut channel is an adaptable and robust slotted metal framing component, designed for simple on-site assembly. A Unistrut system can be easily assembled using just nuts, bolts, and brackets – without the need for cutting or welding. Designed to be corrosion-resistant, strong, easily assembled, and modified or reconfigured – they are ideal for industries such as construction, HVAC, and manufacturing.
What is Unistrut Made Of?
Unistrut is typically made from galvanised steel for enhanced corrosion resistance in harsh weather conditions. However, in some cases, Unistrut channels are made from stainless steel for use in highly corrosive settings or aluminium in lighter-weight systems.
How Much Does Unistrut Weigh?
The weight of a Unistrut channel can depend entirely on the size and material of the channel being used. However, here’s a general idea of the weight of some different types of Unistrut: the Unistrut 41×21×2.5 mm Slotted Channel HDG 3M weighs 5.28 kg, the Unistrut 41×41×2.5 Slotted Channel PG 3M weighs 7.39 kg, and the Unistrut 41×21 Back/back Slotted Channel PG 6M weighs 18.84 kg.
How Thick is Unistrut?
Unistrut channels typically have a thickness that ranges from 1.5 mm to 3 mm, depending on the series of the Unistrut and the load requirements. The thickness of the Unistrut channel affects its strength, durability, and load-bearing capacity, with a thicker gauge supporting heavier loads. Unistrut channels that have a smaller thickness ranging between 1.5 mm to 2 mm are typically found in systems that aren’t required to hold heavy loads. Alternatively, thicker Unistrut channels ranging between 2.5 mm to 3 mm, are likely to be used for more demanding applications, to support heavier loads.
How Wide is Unistrut?
The width of a Unistrut channel depends on the system you are looking to build, with the channels being made in a variety of widths. However, several widths have proved to be popular choices for applications.
The P1000 series, commonly used to support pipes, electrical conduit, and HVAC systems, is 41 mm and is one of the most widely used Unistrut channels. For lighter, less demanding support systems, Unistrut channels with a width of 32 mm are popular, while heavier-duty applications require 62 mm and above.
Is Unistrut Galvanized?
Unistrut channels are commonly galvanised to enhance their corrosion resistance and make them suitable for use in a variety of industries and environments. The galvanisation process involves coating the steel with a layer of zinc to help protect it from corrosion and rust, and ensure it is weather-resistant. There are two key methods for galvanising Unistrut channels, pre-galvanising and hot-dip galvanising.
Pre-galvanised channels have the zinc applied to the steel in a thin coating before it’s formed into channels. This is a more affordable way to galvanise steel and is great for indoor Unistrut systems or environments that have less exposure to harsh conditions.
Differently, hot-dip galvanised channels are steel channels that are already formed and dipped into molten zinc, creating a thick, durable layer. This option is more expensive but is extremely corrosion-resistant and long-lasting, making the Unistrut ideal for outdoor and harsh weather environments.
Does Unistrut Rust?
It is possible that Unistrut channels can rust if they are not coated properly and are exposed to moisture and air. Some channels may come without galvanising as the zinc can interfere with the welding process, and fabricators can achieve cleaner and stronger welds on uncoated steel. However, to keep Unistrut systems rust-free, it’s important to add a protective coating to the application, even if it comes after the welding process.
How to Paint Unistrut:
Unistrut channels can be easily painted, but the correct preparation measures must be taken to ensure a clean and durable finish.
1.) Clean the Surface: Before painting Unistrut channels, remove any dirt, grease, and oil from the channel using an industrial cleaner. This is especially important when using pre-galvanised or uncoated Unistrut.
2.) Prepare the Surface: Next, lightly sand the surface of your Unistrut channel with a sanding block to create a slightly rough texture that the paint will stick to.
3.) Prime the Surface: Apply a metal primer designed for steel surfaces, this will help the paint stick to the steel, preventing peeling and rusting.
4.) Apply the Paint: Select a high-quality, specialised metal paint and apply multiple thin coats, allowing it to dry between coats for a smoother finish. The Unistrut channels can be painted using a roller, paintbrush or spray paint, depending on the desired style and finish.
5.) Let It Dry and Cure: Allow the final coat of the paint to dry fully before exposing the Unistrut system to harsh environments. Some paints may require 24–48 hours of curing time for optimal durability.
