Sanity check. Attaching Baseplates to floor to Frame

[bass-o-matic]

Hiya. I'm building a canned ham from scratch using Airstream-ish construction methods. 10 feet long by 7 feet wide.

I just want to get a sanity check on my frame so far.

1. I've been bolting the Floor Deck to the metal frame with 3/8 Grade 5 bolts. There will be 5 along the front, 4 along one side (with the door), 2 along the Curb side, 4 along the back edge. That's 15 total. That's 4 more than I originally pulled off it. Does that sound like enough? I guess it has to be I don't have spots in the metal frame to do more. I guess my question is.... grade 8? I'm guessing grade 5 is probably stronger than the the metal frame anyway.

2. On top of the wooden deck are the "baseplates" .040 1.5 x 1.5 x 1.5 aluminum C Channel. The 15 bolts will go through those as well anchoring them to the deck with custom square washers/plates I'm fabricating out of 1/8 inch steel. additionally, every 1.25 inches there will be a stainless steel #10 x 1.5 inch hex head screw going through the baseplates into the deck. The deck is 5/8 subfloor on a 2 x 2 frame. The deck is screw and glue with titebond 3 and PL.

From there it's all Airstream-ish as I will be framing and buck riveting on .032 all clad.

My brother says this is all overkill. But I like overkill.

How does this sound so far?