Cutting metal panels on-site becomes a necessity during an ongoing project in certain conditions. Usually, such a situation arises when there’s a sudden need to cut the panel, and returning to the manufacturing unit is not possible. Projects such as hips, valleys, and roof penetrations may require cutting panels on-site due to the nature of the work. This article highlights the best practices and the importance of cutting metal panels on-site to prevent damage.
Why is Cutting Metal Panels Important On-Site?
There are certain situations like hips, valleys, or roof penetrations on roofs when cutting metal panels in the factory is not possible.
The metal sheets have protective coatings that protect them from potential risks of rust and corrosion. This coating also helps to retain color over a longer period and increases the longevity of the metal panels against UV rays, moisture, heat, debris, corrosion and fire. Cutting metal panels with the required skill set and precise knowledge on appropriate tools becomes important. The best practice of cutting metal panels on-site is also important to protect the edges from corrosion by spreading coating across the cut edge.
An Overview of Cutting Metal Panels
On-Site
On-site metal panel cutting does not merely depend on the tools but on the location where cutting is done. It’s vital to follow the guidelines and practices, which include:
Method of Cutting
The guideline on metal cutting methods on-site is important to protect the cut edges on the panel as it affects the integrity of the panel.
The Location Where Cutting Takes Place
It’s always advisable to cut the metal on the ground because, during the process of cutting, particles of steel debris (known as a swarf) fall from the cut area. Swarfs, when falling on the roof, cause permanent staining. Swarfs can cause rust in the panel when they fall in huge quantities.
Tools Used
One of the most important practices is to use the right tools to prevent edge rusting. Avoid using tools like saws, grinders, abrasive blades, and torches.
Different Tools to Cut Metal Panels On-Site
The use of the right tools decides the accuracy of work. The right tools protect the edges of the panels, whereas the wrong tools can result in stains, rust, reduced building life, and compromise with warranty. Here is the list of the recommended tools that are best suited for a clean and durable metal cut:
Aviation Snips
These tools are ideal for small and precise cuts, especially around pipe penetrations. They are available in red color for left cuts and green color for right cuts. Aviation snips wipe the coating with the same precision as factory shears. The biggest advantage is its safety lock.
Mechanical Shears
These tools are ideal for bevel cuts and standing seam panels at hips and valleys. They do not take metal out of the panel while cutting and leave a wavy edge. They protect the edges by swiping the coating.
Skill Saws
These tools are ideal for cutting either straight or at an angle, across or parallel to the corrugations in the metal sheet. Skill saw gives a smooth edge.
Nibblers
These tools are ideal for cutting across corrugation in metal wall panels to create openings for doors and windows. These need to be used with proper care because they cut the metal into small pieces in a half-moon shape that may get damaged when someone walks over it.
Electric Shears
These tools are ideal for longer and straight cuts, especially for cutting wall panels at a corner or at the door opening. They remove about 1/4th inch strips of metal leaving the edges smooth and flat along the cut. They wipe the coating over the cut to offer protection.
Guillotine-Style Shearing Blades
It is one of the most popular tools used to field cut trapezoidal ribbed panels at right angles to the ribs.
Tools to Avoid
There are certain tools that must be avoided completely to ensure damage-free and seamless installations. The wrong tools melt the protective coating, causing rust and steel debris on the panels. Rust can get into the metal panels. Hence, the use of appropriate tools is recommended to prevent rust, stain, and voiding of warranties. These tools include:
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Torches
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Reciprocating saws
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Hacksaws
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Grinders
Conclusion
Metal panels are a popular material used in both commercial and residential spaces. Therefore, it is crucial to adhere to the use of best tools on-site to cut metal panels. Using correct tools with safety precautions for metal cuttings on-site ensures their longevity and durability. These small steps will help you complete the task with accuracy.
