DDA Handrail Requirements: Equality Act 2010 and Part M

There is no British Standard called “DDA”. The Act it refers to was repealed. If a specification tells you to supply a DDA compliant handrail, what it means is a handrail that satisfies the Equality Act 2010, built to the dimensions in Building Regulations Approved Document M.

That distinction matters more than it sounds. The Act creates the duty. Approved Document M gives you the numbers. Confusing the two is how people end up with a handrail that looks right and doesn’t do its job.

The Law: Equality Act 2010, Not the DDA

The Disability Discrimination Act 1995 was replaced by the Equality Act 2010. “DDA” survives as trade shorthand. We use it ourselves, because that’s what customers ask for, but the legal basis is the Equality Act.

What the Act requires is a reasonable adjustment: where a physical feature puts a disabled person at a substantial disadvantage, the person responsible for the building has to take reasonable steps to remove or avoid it. A staircase or ramp with no usable handrail is exactly that kind of feature.

The Act does not specify a tube diameter, a mounting height, or a colour. It sets a duty and leaves the means to you. Which is why every specification you’ll ever read reaches for a second document.

Where the Dimensions Come From

Four documents carry the detail. Cite them by name in a specification rather than writing “DDA compliant” and hoping.

Building Regulations Approved Document M: Access to and use of buildings. The statutory guidance on accessibility. It covers handrail dimensions, grip, position, visual contrast and continuity. This is the one that produces the numbers people quote.

BS 8300. The British Standard on designing an accessible and inclusive built environment. More design detail than Approved Document M, and the document a specifier will usually work from.

Building Regulations Approved Document K: Protection from falling, collision and impact. Where the handrail also guards a drop, Part K governs the guarding: heights, loading, and what the barrier has to resist.

BS 6180. Barriers in and about buildings. The standard to check your loading category against.

Approved Document M and Part K overlap constantly, because most accessible handrails are also edge protection. A ramp handrail is doing two jobs at once, and both documents apply. For the ramp itself, see DDA ramp requirements.

What a Compliant Handrail Has to Get Right

Five things. Get all five and the rail works for the people it’s for; miss one and it doesn’t, whatever the paperwork says.

1. A Diameter a Hand Can Close Around

The Building Regulations recommend a handrail outside diameter of between 40mm and 45mm. Our DDA range is built around 42.4mm o/d tube (size 7 in trade sizing), which sits in the middle of that band.

That’s not an arbitrary preference. A rail too fat can’t be gripped by a hand with limited strength, and a rail that can’t be gripped can’t be leant on. The full reasoning behind 42.4mm is here.

2. A Run That Doesn’t Break

The rail has to be continuous. A visually impaired user follows the rail with their hand from one end of the route to the other, and every interruption, such as an upright post standing proud or a fitting projecting into the grip, is a point where they lose contact or catch a knuckle.

Our DDA fittings work with standard key clamps to give a smooth to touch, continuous 42.4mm rail, held on brackets rather than clamped through each post. More on continuity and why standard fittings don’t achieve it.

3. Visual Contrast Against the Background

Approved Document M treats visual contrast as part of accessible design, not decoration. A galvanised rail against a grey render wall is difficult to pick out for anyone with reduced vision.

DDA fittings and tube are supplied hot dip galvanised as standard and can be powder coated in a RAL colour on request. Choosing the colour against the background it will sit in front of is the whole point of the exercise.

4. A Surface That Isn’t Punishing to Touch

Bare galvanised steel outdoors in January is cold enough that people avoid holding it, which defeats the rail. A powder coated finish gives the impression of being warmer to the touch in cold weather. Galvanised or powder coated: how to decide.

5. Structure Underneath It That Takes the Load

Where the handrail also guards a drop, it has to resist a horizontal load. Design loads are usually stated in the specification; where they aren’t, BS 6180 is the reference document.

The load capacity of a handrail structure is governed principally by the diameter, wall thickness and spacing of its uprights. Wider spacing means less capacity. This is the requirement most often got wrong, because a rail specified at one design load and built at another looks identical until something leans on it. The tube size and upright spacing guide carries the figures.

What We Supply

Our DDA range is a set of DDA compliant fittings that work with standard Fisher Alvin key clamps to build continuous 42.4mm (size 7) handrails: DDA745 and DDA746 wall brackets, DDA747 and DDA748 handrail brackets, DDA725 and DDA09 internal elbows, and A9 internal connectors. Fittings are galvanised as standard.

Assembly needs a hexagon key. No welding, no hot works, no fabrication shop. Tube is cut to length free of charge before despatch, so it arrives ready to put together. On an existing building, see specifying DDA handrails on a refurbishment.

We supply the fittings and tube, cut to length and ready for you or your contractor to fit.

Where the Duty Sits

The Equality Act duty to make reasonable adjustments sits with the building owner or occupier. On a construction project, the CDM 2015 duties sit with the client and the contractor.

As a supplier we provide product to a specification, with technical data. A compliant handrail is one that has been correctly specified and correctly installed, with site-specific compliance resting with the duty holder. If there is doubt about whether a layout satisfies Approved Document M, resolve it before the steel is ordered.

Getting the Specification Right

Send us the drawing, sketch or photographs and the dimensions, and we’ll work out the fittings and tube list. We’ve been manufacturing Fisher Alvin key clamps for over fifty years and the range runs to more than 300 fittings, so there is usually a way to do what the site needs without fabricating anything.

Request a quote and we reply within one hour in working hours, or call the sales office on 01905 779944.

DDA Handrail Requirements FAQs

Is “DDA Compliant” an Actual Standard?

No. The Disability Discrimination Act 1995 was replaced by the Equality Act 2010, and neither sets handrail dimensions. The dimensions come from Building Regulations Approved Document M and BS 8300. “DDA compliant” is trade shorthand: useful in conversation, not precise enough for a specification.

What Diameter Should a DDA Handrail Be?

The Building Regulations recommend an outside diameter of between 40mm and 45mm. Our DDA range uses 42.4mm o/d tube, size 7 in trade sizing.

Does a DDA Handrail Have to Be a Different Colour?

Approved Document M treats visual contrast as part of accessible design. Handrails are supplied hot dip galvanised as standard and can be powder coated in a RAL colour on request, so the rail can be contrasted against the surface behind it.

Do Handrails and Guarding Follow the Same Rules?

They overlap. Approved Document M governs the handrail as something people hold; Approved Document K and BS 6180 govern it as guarding where there is a drop. Most ramp and stair handrails have to satisfy both.

Who Is Responsible for Making a Building Accessible?

The Equality Act duty sits with the building owner or occupier. On a construction project, CDM 2015 duties sit with the client and contractor. As a supplier, Fisher Alvin provides product to a specification with technical data; site-specific compliance rests with the duty holder.