Re: pressurized tubular chassis

Doubtful. You will be simply adding stresses due to the pressurisation to 
whatever stresses are imposed by dead & live loads.
Also at the sorts of pressure you are contemplating (Iassume around 80
PSI)
The stresses due to pressure will be negligable.
I seem to recall that Rolls Royce many years ago experimented with 
pressureised nitrogen chasssis members, the idea was to ensure internal 
corrosion could not proceed.
Remember that if youn do this maybe just to satisfy your desire to do 
something different that a complete seal will need to be maintained so 
drilling to makeb attachments (thought of afterwards) will not be
possible.
Pete
<lethaldriver@[EMAIL PROTECTED]
> wrote in message 
news:1194431612.996153.261370@[EMAIL PROTECTED]
> Hi!
> I am building a tubular chassis and I was thinking if pressurizing
> (high pressure) the inside of the chassis with air would help add
> strength to it?
>