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Curved Armco Barriers – Measuring The Radius

Curved Armco Barriers - Measuring The Radius

When you imagine an Armco barrier, you might picture a strong, sturdy, immovable form of crash barrier protection, able to withstand all kinds of extreme impact. And so you should, because that’s exactly what Armco barriers do.

As a result, the thought of an Armco barrier which has been curved, instead of being ramrod straight, might sound absurd.

But, believe it or not, these tough, durable barriers need to be curved in shape sometimes and still able to do their job, because utility and private property roads aren’t always straight. And it goes without saying that all types of Armco barriers must meet the necessary requirements for your individual project.

Roadside Armco barriers should exactly fit the curve of the road, using the correct radius, in order to give the maximum levels of protection for road users.

How do I measure radius for Armco Barriers?

At Armco Direct, we can fabricate all kinds of curved Armco barriers to meet your requirements, depending on the radius of the road. The radius can be calculated by measuring the width and height of the curve. The exact formula for the radius is this:

Radius Equation 1

In simpler terms, the width is the length of the base of the arc, while height is measured at the middle point of the arc’s base. The formula should then be applied using the principles of BODMAS (brackets, order (power of), division and multiplication, before addition and subtraction).

Another way to look at it is to halve the distance at the base (eg half of W) – then, using this figure and the height (H), you can apply the following equation:

Radius Equation 2

Bear in mind that this radius may not be constant and it might mean that you need to take more than one measurement – as a result, Armco barriers of differing radii will need to be created.

Concave or convex? What’s the difference?

You may think that an Armco barrier can be both concave or convex, depending on the way round that you place it. For those who can’t recall their school days, concave is a curve that faces inward, whereas convex curves outward.

However, when it comes to measuring requirements for curved Armco barriers, a convex beam is one where you want the arc to be facing towards the traffic, while a concave beam bends away from it.

The nature of this will be dependant on which side of the road you would like the Armco barrier to be on. That’s why at Armco Direct our crash barriers can be created to satisfy all kinds of requirements and differing radii.

Take the stress away

If figuring out the amount of crash barrier protection you need to install sounds like a headache you don’t need, why not use our handy online calculator to work out your order requirements or talk to a member of our team? That’s just one of the benefits of buying from Armco.

Others include the following:

  • Years of Armco barrier experience
  • Excellent lead times
  • Next day delivery available
  • Steel products are 100% recyclable
  • All products adhere to industry standards
  • Products are UK manufactured, in support of the UK steel industry
  • All steel materials are galvanised to offer added protection and longevity
  • Unlike some safety barrier providers, we also provide the necessary fixings too

Get in touch today for further details on our curved Armco Barriers and find out how they could be perfect for you to install.