Car park flaps & sidewall damage

[moosepig]

My company has just installed a load of these across its car park entrance:

http://www.hazard.co.uk/one-way-traffic-flaps.html

Does anyone have any experience of these things causing tyre sidewall damage?

These metal surface-mounted flaps have been installed in a single straight line quite close together, not staggered as the above link suggests they should be. Even driving over them at a crawl I get nasty noises coming from my tyres and I can't help thinking that if the inner sidewalls got damaged I wouldn't notice and could end up on the wrong end of a blow-out.

[Nickyboy]

How would they damage the side wall? They go flat as soon as you touch them

[moosepig]

Well that's the point, they don't go flat - they're not recessed, they're bolted to the surface.

[kambites]

I can't imagine why they would damage the tyre? They shouldn't be sharp and tyres are pretty tough things.

[busta]

Bit on a non issue I feel. No worse than other things you drive over day in day out- dropped curbs, cats-eyes, level crossings, expansion gaps etc.

Eta with a gentle approach, I'm pretty sure you could safely drive over them the wrong way too.

Edited by busta on Sunday 30th October 13:37

[xr287]

It says they return to their normal height of 100mm once a tyre has passed over them. So what do they do if someone has less than 100mm ground clearance?

100mm sounds like a lot, there must be a lot of cars with front bumpers that have less than 100mm ground clearance at the front.