There's a lot of misinformation and disinformation posted on this subject every time it raises its head.
Here's the main points...........
ANY fitted system uses the same principal, they're all bolted through the van floor pan and there are spreader plates underneath so the bolts can't easily rip through.
Any load carried in your van needs to be secured, i'm refering to restrained tanks here. The legislation is quite simple. The load needs to be secured downwards towards the floor/bed of the van and best practice indicates in should ideally be against the bulkhead of the van. If this is not possible, maybe due to weight distribution issues then chocks, blocks etc should be used to prevent forward motion.
To save anyone guessing whats illegal or legal here's the authority guidlines on the subject so you can see yourself first hand whats required............
http://www.dft.gov.uk/vosa/repository/MO%20-%20Issue%2039%20-%20June%202012.pdfhttp://www.iosh.co.uk/pdf/FTA%20presentation%20-%20Load%20Securing%20-%20IOSH%20safety%20event%20Sept%2013.pdfAs far as i've seen and i'll happily be corrected, the certification that Ionics/Grippatank and others have is to confirm that
the tank/frame assembly retains its integrity in the tests they've undertook.
Now, stop and think about the bit i've highlighted in bold for a minute. In all the videos i've seen the van is a write off after the test. Ok, the tank and frame has held its integrity. Now none of them have patented or designed a securing method, no, they rely on the bolts and spreader plates. The whole saftey aspect hones around the tank retaining its integrity.
So, in the event of a crash, your van will probably be a right off. No one has tested the 'restraining system' in so far as making sure the tank stays on the van floor. Well, they have and its spreader plates that hold them there. Of course theres no mileage for marketting your system if you just say it stays on the floor like everyone elses because we use stainless steel bolts and spreader plates.
A crap frame will stay on the floor if fitted the same way using spreader plates. Your van will still be a write off. I personally find it very comforting that the tank frames retain their integrity. At least you can go to the breakers yard after an accident and ask for your frame back.
And of course, me being me , i find it quite funny watching some young fellas hair arse the van around like a sports car, safe in the knowledge they have a 'crash tested system'.
Lets not forget..IBC's are designed for carrying liquids on vehicles. Just make sure they're restrained properly and legally.
