formwork for roller door ramps

[shedfooting]

I am building a 6mtr by 9 mtr shed, with 2 roller doors in the 6 metre end. I am presently setting up the formwork for a slab on ground. How do I do formwork to suit ramps under the doors, in order to stop rain running in?

[Boringgeoff]

Do you intend to have your ramp start at the outer edge of your doors? Thats the simplest way because the roller doors have a rubber seal at the bottom of them. In that case form up your shed slab level and add the ramp later. If you prefer to pour the ramp with the slab drop your front form the required amount and put two reference points on either end of the side forms to show your grano where the ramp starts. These two points need to be exactly the right height to get a good seal under the doors when they're closed.
Hope thats helpful.
Regards,
Geoff.