Les Henson Posted May 5, 2009 Share Posted May 5, 2009 Question for those of you that know about stress points in metal, and that sort of thing. Step up Bish I've been helping to build a Trakka the last week, and to avoid the IVA - the chassis has not been cut. Because of the extended chassis length, the rear is a load bed - constructed out of EN10255 tubing, but not bent (this is to get a clean corner for the tailgate/rear lights). The connection to the main cage is by the usual fish mouth, but at the rear it's cut and shut - as is the tailgate itself, which will be held on with 3 x Defender rear door hinges. I had to therefore construct two outriggers to support the rear of the main cage (it would normally be the supplied rear crossmember on the cut chassis). There was a problem with suspension upper travel, which is why the outrigger is such an odd shape - I had to keep away from the wheel as much as possible. The chassis is saddled to some extent, as you can see in the picture with 6mm plate. The top and bottom of each outrigger is also 6mm plate, and the sides are 5mm plate (damned heavy things ). My concern is possible impact forces being concentrated to the corners of the outrigger profile and it may not therefore be as strong as it appears, which is why I used thick steel to compensate for that potential problem. Pics - What do 'we' think ? Les. Quote Link to comment Share on other sites More sharing options...
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