During each analysis of a proposed structure Airspace will produce a VFR - Traffic Pattern Airspace Report. The reports will feature analysis of each airport under review using the default criteria:

1. Category Aircraft "C"
2. A maximum of "4" aircraft of similar category in the traffic pattern at one time

The following imaginary surfaces will be analyzed:

1. FAR 77.23(a)(1)
2. FAR 77.23(a)(2)
3. FAR 77.25(a)
4. FAR 77.25(b)
5. FAR 77.25(d)
6. FAR 77.25(e)

In addition, the Climb/Descent Area and the area between the runway ends will also be analyzed.

The example below was the result of an analysis of the following Airspace Study"

VFR - Traffic Pattern Airspace Analysis Results

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If changes are necessary to either the category of aircraft or the number of similar category in the traffic pattern it will be necessary to do the analysis under TERPS. Pictured below is the analysis of TERPS on the same study point as shown above.

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Remember when conducting a VFR - Traffic Pattern Airspace Analysis, a structure that exceed any of the following maximum allowable heights is considered to constitute a hazard to air navigation:

(1) The height of the transition surface (other than abeam the runway), the approach slope, the horizontal surface, and the conical surface (as applied to visual approach runways).

(2) Beyond the lateral limits of the conical surface and in the climb/descent area - 350' above airport elevation or the height of part 77.23(a)(2), whichever is greater not to exceed 500' above ground level (AGL). The climb/descent area begins abeam the runway threshold being used and is the area where the pilot is either  descending to land on the runway or climbing to pattern altitude after departure.

(3) Beyond the lateral limits of the conical surface and NOT in the climb/descent area of any runway - 500' above Airport Elevation not to exceed 500' AGL.