Help! Multi layer Metal floor

[awilder]

Wondering if what you had is what's at the top of my stairs. This was under the plywood. Haven't taken the sheet up yet.

[Markusbc]

I would look under the bus and make sure it is not a patch for rusted out floor section.

Mine was basically a 6 inch strip to reinforce the mounting bolts for the seats.

[awilder]

Originally Posted by Markusbc

I would look under the bus and make sure it is not a patch for rusted out floor section.

Mine was basically a 6 inch strip to reinforce the mounting bolts for the seats.

Thanks, what should I look for underneath? I guess rust and that patch? A likely place for rust, near the stairs. I'm a little surprised as it's a basically rust free vehicle.

The rubber near it is tucked under it, and there seems to be insulation under there too.

[Markusbc]

If insulation is under it and the patch is not visible from under the bus then It is not a patch. Hard to say. Depending on what you are doing with the bus I would try and replace the fibreglass insulation under it.

[musigenesis]

Originally Posted by Markusbc

I would look under the bus and make sure it is not a patch for rusted out floor section.

Mine was basically a 6 inch strip to reinforce the mounting bolts for the seats.

This does have the look of a post-factory patch, but that's what I thought about your strips, too, so I dunno. Rust damage around the driver's seat and between the seat and the steps seems common, and this definitely looks improvised with the way it's cut and the screws on one side and welds to the top of the steps. I wonder if they had the same lack of courage about welding above the greasy drivetrain as I did.

[Markusbc]

Originally Posted by musigenesis

This does have the look of a post-factory patch, but that's what I thought about your strips, too, so I dunno. Rust damage around the driver's seat and between the seat and the steps seems common, and this definitely looks improvised with the way it's cut and the screws on one side and welds to the top of the steps. I wonder if they had the same lack of courage about welding above the greasy drivetrain as I did.

Could be. Maybe see if you can find the patch panel under the bus and see if there is rust where the panels overlap and if it was sealed with a good quality seam sealer that is paintable. If not that’s how I would seal the lap joint and then paint it with a rust primer and some undercoat.