Any rooftop space can be made more usable with the advantage of these trapezoidal shapes.  Step and repeat these patterns to create corners, borders, walkways and more.  [Two trapezoidal B shapes shown here.]

A  24”H X 48”W [back] X 34”W [front] X 14”D [60.96cm H x 121.92cm (back) x 86.36cm (back) x 35.56cm D]
B  24”H X 34”W [back] X 48”W [front] X 14”D [60.96cm H x 86.36cm W (back) x 121.92cm W (front) x 35.56cm D]