straps are fine dont be put off buy using them theres millions of tonnes of cargo move daily on our roads held with straps , so many experts on here with no data to back up there words i mean would stobart uses straps if they werent up to the job ? would b.t. strap there ladders on the roof with straps if unsafe ?
i good strapped in tank i as safe as a bolted down one as bolted will snapped just as easy as a strap ever more so once the weathers got to them
i good ply lined bluckhead will stop most things , hence this is way there used on flat roofs under pinch roofs that could have couple of tonne of snow dropping on them it down to how well you fit it and what van its going in as well