Roll bar able to accept suspension loads

[Asterix]

[deja vu] From the regs recently published..."In all classes roll-hoops or full-cage must be fitted, but they must not be able to accept suspension loads."

Surely, any roll-hoop accepts suspension loads?

On the assumption that's incorrect and I'm missing a trick, what makes a roll hoop accept suspension loads?

[John Loudon - Sponsorship Liaison]

When the top of a shock absorber is bolted to it as in a full cage or space frame

[Asterix]

Tanx John, but that can't be absolutely true as quite a few people run full cages...

[ACW]

The history of that particular rule in the blue book is dune buggy / off road racers.

As you have realised all cars the roll over cage will take suspension loads, especially in a Severn Vehicle. In many cases a 150% increase in stiffness might be offered by a cage.

The rule in the blue book was designed to stop direct mounting of suspension components on the roll over component to ensure they remain distinct items. There were a number of issues of failure of one component as a result of it acting as the other.

ie suspension fails damaging the roll over bar which as a result of the suspension failure gets needed.

HTH,

ACW.