Get the Right Cover: Manholes Made SimpleFebruary 24, 2017
If you’ve ever tried buying a manhole cover, you’ll know how daunting it can be. There are so many types, with complicated alpha-numeric codes on them. So, let’s try to simplify it, using examples from TBS’s own supplier, Clark Drain.
First up, domestic / pedestrian covers. These have an A15 rating (According to British Standard EN124:1994). Technically, that’s 1.5 tonnes, and you may think your car weighs less than that. But when it’s turning on the drive, the load on a wheel may be a lot more. That’s why under-rated manhole covers bend and crack.
For driveways, then, you need covers in the B125 range, which can be anything from 6 tonne to 17 tonne load capacity – depending what you use your drive for!
Then, for the main highway, you need top whack, the D400 covers. We stock a range of 38, 40 and 44 tonne models, including D-Tri and hinged drain covers.
Finally, if you need a more concealed cover, there are the recessed variety. Square (300×300 mm or 450×450 mm) or rectangular (600×450 mm) models are intended for block paving or concrete filling. The round version can be filled with landscaping material like earth or gravel.
We hope that helps. Don’t hesitate to ask our nice Sales teams for further information – and about our attractive prices!