Does My DDA Handrail Require A Bottom Rail?
Where there is a risk that a wheelchair or push-chair wheel could slide under the mid rail and off the side of the ramp, the Alvin DDA system can be configured with a third rail attached between the bottom of each upright to work like a Toe Board and prevent this from happening.
Many ramps and walkways are built or pre-formed with upstands of some kind at the edges, so a separate toe board is not always required. If you decide this risk is present in your system, you can link the uprights together using a bottom rail, in line with the uprights. This option is useful where the uprights sit on the walking surface. There are a lot of different possible configurations however the most common would be:
- For uprights on gradients of 4º to 10º use the G22 cross clamp.
For uprights on gradients of 11º to 30º use the C58 cross clamp.
- For gradient changes use the A27.
- For flat areas use the A22 cross clamp and the A06 for corners and the A02 short tee to start and finish the run.
There are a huge variety of clamps available to handle changes in gradient and direction, the full range is available here, however do please give us a call for advice on 020 8254 2626.
To meet Part M or Part K of the building regulations, handrail should "not become excessively cold or hot to touch" and you should “ensure that the handrail will contrast visually with the background against which it is seen without being highly reflective”. This is normally achieved through Powder Coating, and the visibility criteria would still apply to a bottom tube. Find out more information on our Powder Coating Powder Coating here.
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