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Then you likely have to do a preliminary design of the canopy to determine what shears and moments are created. In addition, you have to clearly stipulate what your design criteria is for the canopy designer and fabricator, so he ends up with similar. You also have to stipulate on your drawings what your design loads and resulting reactions (that includes +ve and -ve forces) and leave the final design with a condition that the canopy loads cannot exceed your loading criteriia, and that you are not responsible for any redesign costs. It's a bad way to do it. It's difficult in assigning someone the loading; I hope you have some control over it. Why would the regulatory authority have any input as to the type of construction. HSS columns with proper anchors is a much better way to go. If the column has to be concrete, it might be better to construct it once you have the canopy loading, and put the excess design into the foundations. Foundation costs are relatively insensitive to loading (usually). Dik