Roof Raise and skinning
Help me Skoolie-wan-Kenobi, you're my only hope!
So, after watching the Transcend Existence video series about three times(thank you Wess) I'm about to set out on the adventure of a lifetime and perform the magic of a roof raise. With luck I won't roll a 1 and have the whole thing blow up in my face.
I think I'm comfortable with the raise itself, but I'm rather anxious over the re-skinning. I have little metal working experience and am learning everything as I go along. Seriously, should this work out, my skoolie project is going on my resume.
Rivets. I am so sick of not understanding rivets. I grok the basics, but am lost on the specifics. The soup of different opinions both here and on google have been distressing. Blind, teapot dome, structural...
From what I can tell, Rowsdower is rocking 3/16th" holes. 3/16" rivets are a mite loose, but 1/4"s don't fit t'all. So I'm going with the former. I'm looking to install 18 gauge sheet metal as the skin, but that is the only dimension I am certain about.
Is there a general and safe grip range that anyone could suggest for this portion of the insanity? At around 12 per foot on a 40 foot bus, I'll need over 1200. And with overlapping panels, I'm hoping to have a one-size-fits-most option here.
I've seen many videos where the raisers welded angle-iron to the posts and then riveted the skin to the angle iron. But this requires a ton of drilling. So, would tacking the skin to the angle iron via welding be an option? I bought a welder for this and want to find things to use it on. Plus, I really don't want to drill that many holes in thickish steel.
I have a literal hojillion screws that International used to fasten the windows, walls and ceiling panels. Many of them are still functional, and as a bonus, appear to have been used in places on the exterior of the bus. Could I just bypass this huge headache and reuse the screws on my skin? Assuming that they too are 3/16ths diameter?
If so, would I need to apply some sort of adhesive to secure them? I mean, Rowsdower saw 15 years of service in Toledo and none of the screws seem to be loose.