How thick are people making their (steel) floors?

Please post in mm rather than gauge if possible.

Mines 1.5mm thick Ally, PU bonded and rivetted every 1.5" to the chassis and it seems very solid.

HTH

Nick

16g is roughly 1.5mm and 18g 1.2mm. You shouldn't need anything thicker or thinner than this. You could go thinner if you can swage the sheet to stop drumming and flex or put more support in but don't put tubes in where your feet need to go for the pedals or they could get in the way.

Mines about 0.8mm but swaged.

HTH,

James

1.6mm steel as I think it says in the book


However, I found that as you really need to add a couple extra cross bars to mount the seats on anyway, the floor could then be replaced with something thinner, or softer, like alu. just b aware to put something decent where your feet stand on climbing in and out.

atb

steve

16swg (1.6mm) here too. With the minimal ground clearance I feel quite safe in the knowledge that I have a nice big chunk of steel between me and any rocks which want to jump up and hit me between the legs...

It is also seam welded fully on the outer edge and stitch welded 1 in 6 on the inside edge.
Cheers,
Craig.

it was mentioned a few years back on the aussie yahoo list that someone in the outback on rought ground got speared by an object coming up through the floor.....



atb

steve

I did mine in 18g and braced with 13mm ERW, but look at the distortion
Rescued attachment Floor.jpg

im glad you posted that pic. When I welded mine up full seam at the edges, mine did just that too. Adding the seat braces stopped it pinging.

if a professional welder gets the same result, im well happy to have acheived the same!



atb

steve

Yep, mine did that as well. Not too worried though, you don't get to see the underside of the car very much (hopefully).

What spec to use? 6061-T6?

Apologies for the hijack.

--Chris

6061 would be fine but may be costly and/or hard to locate. 5083 is fairly common and is a good structural grade. As is 5251...treadplate is made from 5251.