why doesn't any one tie the roll cage into strut towers?

[Guest bluex_v1]

It seems to me, you could save a little weight and have a stiffer chassis if you were to make one of the rear roll cage cross members tie the rear strut towers together. I haven't seen anyone do this...any particular reason?

I'm thinking some plate to 'hug' the sides of the towers near the top and have the cross bar welded or bolted to it..that way you can still access the bolts on the top of the tower. I know there's tons of stuff I don't know about that may be a contributing factor to why this is not a good idea, but it just seems like a logical thing to do. ...I was thinking you could do kind of the same with the front down tubes that run along the A-pillars, except have them bend forward and to the firewall, then in the engine bay, have some more tube (probably square) run to connect it to the front frame rails (it might get troublesome here getting it between the MC and steering shaft, but then for the front towers, have some square tubing welded to the sides of the towers attaching to the frame rails also...then you'd have your horizontal peice bolt to the tops of those. - so everything would all be tied together with the cage...make sense or would I just be making a ton of work for myself with no real benefit?

[Guest scca]

i've seen lots that way so not sure what cars you are lookin at?

[johnc]

Most cars you see with roll cages are built for sanctioned racing. In many cases the sanctioning body specifies the number and type of attachments the cage can have to the chassis. In the SCCA ITS class where most racing 240Zs compete the rules allow 8 attachment points and none can be forward of the front firewall.