Hi Fred,
I attached some photos of my 6' x 9' steel trailer chassis build, which has plywood flooring.
I originally started riveting the aluminum frame with rivets I found on amazon, only
to realize the amazon rivets are the wrong size, so the corner bracket is loose.
I just purchased rivets from Hanson supply, they arrived in the mail today, and I will proceed to use Hanson rivets only!
I have a rivet grip range, and will purchase aluminum square tubing, and cut the squares as you suggested.
I will make sure the aluminum cleats, and frame thickness matches the rivet grip range.
Thanks for the tip on making angled cleats!
(The cleats are made from 1x1x1/8 angle using a drill press w/fence & cut to one inch length with a horizontal band saw.)
Hanson supply Rivet dimensions:
blind aluminum rivet closed end with steel mandrel
rivet size: 3/16 "
rivet grip: .313 - .375
Aluminum square tubing dimensions:
16 gage (1/16") x 1" x 1" 6063-T52 square tubing
Thanks for your expert advice, I will try to upload photos soon!
Sandro