12.4.3 Adjustable Height Mobile Supporting Structure

To provide limited variations to the erected height of the runway, an adjustable height mobile supporting structure has telescopic supports enabling the runway to be raised or lowered to suit differing site conditions. This facility is not intended for use under load but is to allow for varying lifting height requirements only. This design is available in all capacities, usually up to 5 tonnes. (See Figure 12.4.3-1 )