can you post a picture of 'round flat roof'?  I'm confused how a roof can be flat and round at the same time :/

this is how it almost going to look like...http://www.google.com.my/imgres?start=100&um=1&hl=en&sa=N&tbo=d&biw=790&bih=385&tbm=isch&tbnid=4aYjF5EVY9oxfM:&imgrefurl=http://www.garlandco.com/products/metal/standing-seam/index.html&docid=x0VI2Gv6F4Ly5M&imgurl=http://www.garlandco.com/images-garland/products/metal/standing-seam/R-Mer-Seam_Metal.jpg&w=300&h=300&ei=DR2_UOiVF8e4rAfp64GgCg&zoom=1

i see a dot ... like literally .... a dot

same here, accesskb. i'm guessing dogleas may be looking to structure a circular plane. from the previous post, maybe with a hole (skylight) in the middle.

unless you want something exotic, doglease, like a tension ring or concrete planks, you can do a circular plane with bar joists and a metal deck just the same way you would do if it was a rectangle.

is that what you're going for?  

actually, i just went to this link: http://www.garlandco.com/products/metal/standing-seam/r-mer-seam.html

...and it doesn't look to me like this is actually a flat roof. i think it may be just a tight shot of the top of a domed structure. BUT, it's possible what you're looking for is a compression ring-type structure which you could do in either steel or concrete, i think. 

google 'compression ring structure' and see if it looks like the right direction. 

Steven Ward,exactly,a circular plane roof frame is what im looking for...sory for the bad link guys...

What diameter (approximately), are you looking for? What material? What is the construction of the rest of the building/structure? 

I would be happy to help.

Please send desired final dimensions, general construction method description, climate information, site plans, and compensation and I will be happy to whip those details up for you tonight.