Side Intrusion Bars

My mechanic is trying to decide the best way to sort out intrusion bars for my car (because it's being engineered), and he is worried about the potential for rust when adding custom intrusion bars to the doors. I understand that the bars usually get installed in two halves then welded in the middle, but what is the usual way of mounting them to the door at either end? Rivets, welding, or both? Realistically what sort of issues am I likely to come across, even with proper priming and painting (which will be difficult inside a door anyway)?

artymr2
The easiest way is to probably find some australian delivered doors.

 
That's what my mechanic has suggested. We may go down that path, but I don't really like the idea of wasting a perfectly good pair of doors, especially when I just got one of the power window regulators replaced with a brand new part.
 

artymr2
All the ones I have seen that have been retrofitted have been bolted, see attached pic, this is at the rear end of the door, I presume the front is similar.  If its done properly, I shouldnt rust.

 
Thanks for the photo, photos are very useful to me right now

Sooo, I'm kinda annoyed right now.
MRC just called me (after they had a chat to Consulmotive and a panel beater, which I wish I had done earlier), and it sounds like Consulmotive won't engineer intrusion bars unless they are done with the same strength or stronger than the intrusion bars in standard ADM doors. This basically means that it's unlikely that it would pass if they were only riveted or bolted to the doors (and the panel beater said there is a likelihood of bubbling the paint if they try to weld the bars to the doors, with or without rivets/bolts aswell). The result of this problem is that I'm probably going to need to source a pair of ADM doors, and transfer all the trim and mechanical parts from my doors into the bare skins of the ADM doors, then have them resprayed if I can't get them in black. I think the fact that my power window regulator was just fixed in my JDM doors, is the main reason that I'm annoyed, but at least the parts can be transferred over. I still hate the idea of having to do this when my doors are in perfectly good condition

You're probably gonna say "go to a different engineer", but that would be another big hassle in itself, so I'm not going to do that.

So, firstly, can anyone confirm if ADM doors have identical mounting points to the JDM doors, and whether the JDM door trims and power window assemblies will be able to attach to ADM doors? I f**king hope so.

Also, does anyone have, or know of anyone who does have, a spare pair of ADM doors (which can be completely bare) in good condition?

MRC said it could also be useful if someone in Sydney had a JDM door with intrusions bars, just lying around so they could borrow it for inspection, to see how it is done custom?

If you ever get T-boned (hope not!) you'll thank yourself later for getting the ADM doors. 

To be honest I dont really know anything about them.
They look like standard being spot welded in ect. But its a 96 JDM. Maybe they put them in the later ones, but not sure.
I was the first proper owner in Australia, It came in as a privet import but was traded straight away

I am pretty sure Dasic1 is right, I recall somethign about the later JDMs having side intrusion bars standard.
 
Maybe suggest a swap of doors if you know someone with a race car that has them = free weight saving!!
 
Cheers

i have never seen a jdm mr2 with door bars but those are the same as you will find in an ADM car certainly.