It would be simpler/wiser to contract a fabricator to construct your canopy based on the design/drawings and specifications.

I believe the architect has incorporated it in the design of this multi-storey building project.

cantilever having 24 feet length , 24 feet width?

Must you have it Cantilevered? What about storms*? Uplifts *?Earthquakes?* Costs*? Stress* on main building frame?

If I were you I would go for Tied/ arched Plain GI SHEET roof with 6' clear(at edges) height and maximum rise of say 4' above that 6'. All at 10% cost of Cantilevered and with Zero Risks*.TOTAL WEIGHT≤ 500kG Steel.and ≤1 Lakh.

Dear Ratnagiri;

you are not clear where, why and for what purpose you are using this canopy.

If you think you have to have fabricated 24' x 24' Canopy, then you have to get in touch with a good structural engineer, and ask him to design for you. Or look into yellow pages and contact pre-cast concrete manufacturer. Some of them have in house designer too.

Good luck

I don't want to waste verbiage. But everyone here is offering good advice.

I do know their are modular units that are supported on all four corners by posts. But cantilevering a 600 square foot "sail" requires some analysis that is specific to the region you want to build in. The wind has to be taken into consideration. And the design to resist that moment can't be passed on over a bulletin board or chat room. That analysis has to be performed by an expert. Free advice in this instance is going to lead to a disaster.

And most importantly, somebody should get paid for providing their expertise. Sounds like you want to copy somebody else's design.....pretty risky!

You are 100% right Ccoop610. This requires lot of work and expertise

My request for photos & site is to find out if anybody has done it i.e.feasibility & basically to get some idea to start with.Regulation needs Structural engineer's design & certification anyway.

Thanks to all.

Ratnagiri

Ratnagiri--

This is not my area, but I worked years ago with a steel-worker friend who was highly skilled in using the Unistrut company's space frame components to fabricate canopies according the engineering specifications.

I am sure that their system is still being marketed, so that would be one probable site to view on the internet for photo's and examples. It would be an example of being able to match off-the-shelf components to a specific application's design requirements for live load, dead load, wind uplift, seismic load, and so on, as well as to esthetics, shape, color, etc.

--John M.