Understanding the Variations in Metal Building Kits

metal kit
20 Jul

Understanding the Variations in Metal Building Kits

There are two different kinds of metal building kits, pre-engineered and pre-fabricated. Pre-engineered sets will often fit together in a number of different ways whereas pre-fabricated is a basic one design kit. Both will arrive at a construction site ready to erect with the minimum of effort for construction workers.

Metal is better

Metal building systems are the best you can get and are so much better than other materials in terms of durability and weather resistance. There are also other factors at play which makes metal the best choice.

Time is often a constraint that the building industry is up against. Pre-engineered or pre-fabricated buildings arrive ready to assemble immediately and can be put up fast, much faster than when using other materials.

Metal also keeps the cost down. Because it is easier to assemble the amount spent on labour is less and also because it is self assembly lower skilled workers can be used who will be paid less per hour than their more skilled counterparts.

Quick and cheap, but without compromising on quality is the kind of construction that brings smiles to the faces of bosses and in fact this kind of construction can be up to 60% cheaper than other methods.


Metal building systems allow expansion where necessary. If a building needs to be increased in size it can be as simple as removing an end or side wall and attaching a new frame to the existing model. And it can all be completed quickly.

It can withstand weather like no other material, even hurricanes or earthquakes pose little problem for the structure.

And due to its fire retardant nature, metal buildings can be up to 40% cheaper to insure.

Environmental advantages

metal roof

Environmental concerns are growing and more sustainable materials need to be used. Many metal building systems are made from at least in part recycled steel. A 2000 square foot building needs the equivalent amount of steel that could come from six scrapped cars. The same size structure in wood would use 50 trees, so it is definitely an advantage.

Metal also has a longer lifespan and will not need replacing with new material as quickly as a wooden building which means using fewer resources still.

Steel is also much more energy efficient when it comes to heating or cooling of a building.

Whether pre-engineered or pre-fabricated, steel building kits are the way forward in construction.

20 Jul

Everything you should know about mandrel bending

Quite often when bending metal, mandrels are used to provide a smoother bend. The mandrel assists particularly in more complex bends by hindering collapsing of the tube or wrinkling or kinking for a much smoother finish.

Ideally a mandrel wouldn’t be required for a bend, but the radius of a bend, thickness of tubes and differing tube materials make the use of a mandrel the best way forward.

Different mandrels


There are many different kinds of mandrel made from different types of material and choosing the best one for each bending job is critical. It is most common to find mandrels constructed from an aluminium and bronze alloy or steel with chrome plating.

The aluminium and bronze mandrel can be used for bending stainless steel, titanium or other harder materials. Steel and chrome mandrels are best used with aluminium, copper, steel or softer materials.

Ball mandrels are the most commonly used as they are able to flex in all kinds of plane. Plug mandrels are also used in international pipe size applications, and even single plane mandrels are used in some situations.

There are also mandrels containing a pre-cut radius to match the bend that will be made. These are formed tip mandrels.

There are inserted ball mandrels for higher volume tasks and these have a nosepiece to them which can be replaced.

Thinner materials can be bent using a close pitch or thin wall mandrel. There are also ultrathin and ultraclose mandrels for the absolute thinnest of materials and for the tightest radii which are typically used in situations involving applications for aircraft.

Precision is key


Where the mandrel is placed is the most important part of the operation. Get this wrong and the bend will be wrong. The very front end of the shank of the mandrel should be situated just past the tangent and it should be done with great care. Obviously it is critical to check all tangent settings before beginning.

Sometimes the bend might not work out properly and there may be mandrel problems. The size or placement of the mandrel could be wrong. It can all be resolved with some troubleshooting.

By choosing a mandrel of the correct material and size and correctly maintaining bending machines, this technique is by far the best and easiest way to bend a whole host of materials accurately and leave a good finish.