I'm wary when dragging the shed. Car transporters are the worst for some reason.
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That doesn't surprise me and most skilled drivers realise this and pass by considerately, the air funnelled through and around the load, which is seldom the same twice, would be interesting to see in a wind tunnel, empty i expect they offer no problem at all.
Certainly whilst unlikely to be pushed over in cross winds due to the weight (21/22tons empty) they are badly affected by gusting winds, the inherant instability of the common design (short tractor long drag, not a semi trailer design) can exacebate the problem creating a sort of pendulum effect a bit too easily for comfort...its this pendulum effect that worsens the chances of a rollover especially (exactly as with car towing a shed) there is not enough weight imposed on the towing vehicle or the weight distribution is concentrated towards the back.
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