How strong is a sheet of 1200x1200 comp panel

[jetcrew]

as tittle suggests I am wanting to know from those who have knowledge of ally comp panel 3mm

would a 1200 x 1200 sheet be fairly rigid I want to bolt through it onto 2 roof rails and want to know if it will develop any flap in that size .

Ta jet

[edz]

Hey Jet the piece that I have, roughly that size takes a bit of preasure to bow by hand to  flex about 25+mm in the middle .If were to lay flat and be thin edge on to the wind and bolted along two sides you shouldnt get much flex ..Could you not sickaflex / countersink rivet a small ali angle brace under the center section to help support it ?.

[dales133]

I'm using 4 mm as my subfloor as I can get it 3.0x1.5.
For specs it varies from brand to brand but the stuff I'm using exceeds usual comp sheet as it is industrial/architectural structure speced.
Got to ulrich aluminum website and they have full specs on thier great product witch would do what you want.
Most other brands are a similar beast.
I can get a limited number of these sheets for around 80 a sheet witch is dirt cheap for solid core structural strength.
Here's the Colour
I'm not looking at making anything but we would all get it cheaper at quantity.
There are about 9 sheets, at this stage I want 3.
Location geelong
Sorry for the partial hijack but more than happy to help you out jet. They will cut , v groove and fold to your requirements