Order Process

Quoting

At Polsteel - we don`t believe in rough quotes based on total weight of the structure as this usually results in extra costs being added at later stages and proves to be inaccurate for your tender process.
Instead we pride ourselves in responding to your submitted drawings with personalised, detailed quotation within 24 hrs.
Please note that we treat every project individually and in some cases we may require more details from you or a help from Design Engineer. In rare cases the quoting process may take us longer than anticipated however please rest assured you will get regular updates about its progress.
Our Quotation includes a breakdown of competitively priced stock as well as additional services required as per your specification i.e. galvanisation, drilling or coating and delivery charges.



We have carefully monitored the time fabrication of each order in the past and based on that we are able to give you the accurate lead time based on the scale of your order.
Thanks to our comprehensive production monitoring system, we are able to tell you exactly when your order will arrive at your site – we work in line with you and for your benefit.
If you are in the process of tender for your client and need a rough calculation of how much the steel work for the project will cost, please take a peek at the short movie below:
In order to obtain a quick estimate guide, please call our office now, we are here for you.

3D Detailing

All of our fabrication drawings are produced using state-of-the art software - Tekla Structures.

Our engineers are regularly trained and stay up to date with the latest news and technology. Rest assured you have the best team at hand to support and guide you.



This highly sophisticated program enables to visualise the entire steelwork structure as a computerised 3D model. A ready design may be viewed (rotated, zoomed and tilted) on every computer and approved by the client before the fabrication. It eliminates the chances of potential material clashes and design issues. These may be easily visualised, explained and solved with positive impact on the final lead time.



Steelwork detailing is part of every project, however we offer sole detailing services as well. Some fabrication plants do not have sufficient facilities to carry out the detailing phase using own resources, therefore we are here to help. The result of our steelwork detailing service is a computerised structural model and quality fabrication drawings. If you require any detailing to be outsourced, we are happy to take the load off you. As we are a UK based company, you will benefit not only from virtual communication, but also the possibility of arranging in-person site or office meetings.

Fabrication

Welding



Welding is a process of joining 2 parts by melting the adjoining surfaces and adding a filler. Heat is generated by an electric arc. The melted pool needs to be in a oxygen free environment, which is achieved by a shielding gas. For our steel fabrications we use MIG welding, short for metal inert gas. The filler is a 1 mm wire fed through the centre of a nozzle that blows argon gas onto the welded surfaces. The three-phase MIG elders that we use provide sufficient power to guarantee deep penetration with no intrusions or gas bubbles that did not manage to escape during the welding process.
Welding is associated with local high temperatures, that distorts the welded items when cooling down too fast. It is therefore essential to allow for the changes by setting the welded part slightly at an angle prior to welding it. In some cases however, the surfaces need to be pre-heated and then the cooling process needs to be extended by heating the surface in intervals.
Welds play a crucial part in every welded structure, as they carry the entire load that the beam is carrying. There is no room for error and every single weld needs to be done correctly. Welds need to be inspected visually or by using other methods. A proper weld bead should be smooth with the edges clearly “bitten” into the welded parts. Achieving this is the result of correct welding machine settings, preparing the welded surfaces and experience.



Drilling



Drilling is an essential fabrication process that allows bolting a steel structure together. The art of drilling has been known to humans for over 35,000 years. A lot has changed since a pointed rock was spun between the hands and now we have access to highly sophisticated machinery. For steel fabrication purposes we use a radial table drill for drilling holes in plates and magnetic base drills for drilling holes in beams.
When drilling holes it is essential to keep the centres within a ±1 mm industry standard tolerance so that 2 different beams bolt together with ease. We set the standards higher by performing diagonal tolerance checks of also ±1 mm.
In the nearest future we will be purchasing a numerically controlled drilling line which will allow us to drill holes quicker and at an even higher tolerance.



Punching



Pascal’s law states that “pressure exerted anywhere in a confined incompressible fluid is transmitted equally in all directions throughout the fluid such that the pressure ratio (initial difference) remains the same.” This principle was stated in 1648 and has been applied to virtually every industry. In our industry it is used for creating great forces, which allow punching holes through steel or simply slicing it to pieces.
A multi-purpose hydraulic punch that we use generates a force of 70 tons. This allows punching through 20 mm steel plates. We also use a portable hydraulic punch which is perfect for holes in column flanges used to anchor it to a wall.
Unlike drilling, the enormous pressure applied during the punching process distorts the material micro structure nearest to the punched hole. This results in micro cracks that weaken the material. For this reason holes should not be punched in plates that will be highly loaded.



Priming



The technique of priming uses a paint rich in zinc phosphate, which is applied to the steel and provides an active corrosion resistant coat. The compound in the paint disrupts the normal formation of anodes on the surface of the steel, what we would generally see as ‘rust’. It achieves this by hydrolysing in water to produce zinc ions (Zn2+) and phosphate ions (PO43-). The phosphate ions act as anodic inhibitors by phosphating the steel and rendering it passive, whereas the zinc ions act as cathodic inhibitors. To be sure this method will protect your steel, the paint needs to be applied at an optimum thickness of 125 microns. For this, two layers need to be applied directly on the steel using a roller, after which the steel should remain rust resistant as long as it is not used outside in harsh conditions.



Galvanising



Galvanising is quite simply the process of coating steel with zinc, and it is achieved by dipping the steel in a bath of molten zinc. Once the zinc is cool, it reacts with the steel to form zinc carbonate, which protects the steel in two distinct ways:
1. The base metal is protected from direct contact with the atmosphere by the zinc coating.
2. The zinc coating provides ‘sacrificial’ protection. What this means is that, because the zinc has a greater electronegativity than the steel underneath, it will corrode in preference to the metal it is protecting.
Galvanising is an essential part of steel fabrication when the steel is going to be used in an external or damp area. This could be outside in the wind and rain, or even in the cavity walls of a house where it is likely to be moist for a lot of the time.



Fire Protection



As well as priming and galvanising steel to make it stronger, the fire resistance of the steel structure can also be improved, using fire resistant paint. This treatment can extend the time it takes to melt steelwork by around half an hour. Because it is a water based coating, fire resistant paint needs to be protected from the weather, so for some projects the installers may want to paint it once it is in situ.



Delivery

Your delivery is scheduled at the time of placing an order with us. We understand that having steelwork delivered on time is crucial for your business and involves organising extra manpower on site. We do realise, that any delay costs you money therefore we work hard to meet agreed deadlines.Keeping our promise is Polsteel`s core value.

Our delivery team uses crane lorries for offloading heavy steel beams, as well as smaller vans that can access narrow, London roads.






The delivery of your steelwork is accompanied by a 3D drawing of the structure. It's a simple manual assisting your manpower in quick and efficient assembly on site.

Contact us

Polsteel Ltd
Unit 9, Fairway Trading Estate
Fairway Close
Hounslow
TW4 6BU

Tel.: 0208 569 8144
E-mail: sales@polsteel.co.uk

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