The height of buildings/structures within this area shall be limited by an imaginary line with slope of 2% (1:50) for aerodromes where turbo-jet aircraft operates, and 2.5% (1:40) for aerodromes where no turbo-jet aircraft operates from the inner edge reckoned from the surface of the runway. The dimensions of the isosceles trapezoidal are as shown on Table VII.3.below: