Various Custom LEGO SNOT Roads pictures and LDR source files.
This design incorporates 24 pillars with an interior outdoor courtyard with 314sq meters of space. The complete roof structure is supported by the 24 free-standing 1.2m x 4m x 7m pillars. The end of the roofs may contain cable stays to support the roof.
This is a rather larger Dome. I used the profile from a surplus air form from monolithic domes. The dome is 110 ft by 45ft. I split it in half and filled in an area between them to extend the length by 40 meters.