keeping them running
Page 59
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by Trevor Lon gcroft
3hting an overturned tanker ided with an inflammable uid or dangerous chemicals 1 be a dangerous process, so I interested to learn of a stern developed by DialImes involving the use of -bags to provide lift. Some fire gades use a similar method ten extricating persons pped after an accident.
The Dial-Holmes method can used with tankers up to 32 is gcw.
A deflated bag will slide into a i. gap and the method is to le these between the ground I the vehicle side, and biased yard the vehicle, so that sting the bags rolls the licle upright.
The air-bags — Dial-Holmes I them "air. cans" — are 4ft. diameter and have an inflated ight of 411 Construction izes flexible neoprene /nylon ric walls which are oil and To! resistant. Lifting capacity bag is 5.6 tons and 4.8 tons 7 psi and 6 psi respectively. Compressed air from an air cylinder may be used provided the correct reducer valve is fitted.
The resistance of a load to rolling action is 75 per cent of that for a straight lift. Therefore, a vehicle weighing 20 tons would, for instance, require a 15-ton lift or three bags.
For further information: DialHolmes (England) Ltd, Caxton Hill, Ware Road, Hertford, Herts.