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Avoid the 4 common mistakes made when purchasing keyclamps.

Avoid making any of the common mistakes made when buying keyclamps and come to Hacketts Pipeline
View our range of keyclamps on our website - www.hackettspipeline.co.uk
Avoid the common mistakes when buying keyclamps and refer to the 4 most common we come across

1. Incorrect keyclamp size purchased for suitable tube

One of the most frequent mistakes made when purchasing keyclamps and the relevant tube is selecting the incorrect keyclamp size for the steel tube.

There are usually 5 sizes of tube clamp; G20, G25, G32, G40 and G50. The 20, 25, 32, 40 and 50 fittings size also correlates to the metric nominal bore (the inside diameter) of the steel tube you need to use.

Fittings
Nominal Bore of Tube Req'd
O.D. of Tube Req'd
  Metric Imperial  
G20 20mm 3/4"
26.9mm
G25 25mm 1"
33.7mm
G32 32mm 1 1/4"
42.4mm
G40 40mm 1 1/2"
48.3mm
G50 50mm 2"
60.3mm

For example, if your structure required 1 1/2" tube, you would require a fitting suitable for a 40mm nominal bore which would be a G40.

3. Too much or too little steel tube purchased

If you are unaware what lengths the suitable steel tube comes in, it can make it very difficult to calculate how much tube you will need.

The EN10255/BS1387 galvanised steel tube for tube clamps is available in random lengths of 3.25m or 6.5m lengths and can be cut to size for your lightweight tubular structures.

It is also suggested that any structure should have a vertical post at every 1.5m intervals to give your structure its optimal strength and this should be taken into account when designing your structure and calculating your tube quantities.

2. Incorrect tube size purchased for DDA keyclamps

Another common mistake made is purchasing the incorrect tube size for the DDA range of keyclamps.

The DDA range of keyclamps fittings are designed to meet the requirements of Part 'M' of the Buildings Regulations 2004 to provide a smooth continuous handrail of 42.4mm diameter. This means that for all DDA structures, the only tube you will need to purchase for handrailing is 1 1/4" steel tube.

Whilst the handrail used for DDA tubular structures is 42.4mm diameter, the uprights such as vertical posts use 48.3mm diameter tube and means you will need to purchase 1 1/2" steel tube.

4. The confusion over a Wall Flange (C11) and a Floor/Railing Base Flange (C12)

The Wall Flange (C11) is often mistaken as being suitable as a structural railing base. In the instance of a structural railing base being required, the Floor/Railing Base Flange (C12) should be purchased.

The Wall Flange (C11) is designed to provide a positional wall fixing and can be used as a base fix but it is not recommended it be used as a structural railing base.

The Wall Flange (C11) has 4 x 9mm fixing holes and 1 x setscrew to secure steel tube.

The Floor/Railing Base Flange (C12) is designed to provide a base for railing and other structures and has 2 x 14mm fixing holes and 2 x setscrews to secure steel tube.

We also supply EN10255/BS1387 galvanised tube for all your tubular structures
We offer next day UK delivery, subject to stock