What is the vertical limit of Class B airspace above the primary airport normally?
Mode C Veil.The airspace within 30 nautical miles of an airport listed in Appendix D, Section 1 of 14 CFR Part 91 (generally primary airports within Class B airspace areas), from the surface upward to 10,000 feet MSL.
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Vertical Limits.The upper limit of the airspace should not exceed 10,000 feet MSL. However, high airport field elevation, adjacent high terrain, or operational factors may warrant a ceiling above 10,000 feet MSL.
Class Bravo airspace (Class B) is that airspace surrounding the nation's busiest airports. Class B airspace supports both Instrument Flight Rules (IFR) and Visual Flight Rules (VFR) operations within.
Class B Airspace AltitudeIn some high-altitude airports like Denver, the Class B ceiling extends up to 12,000 feet MSL. Atlanta is another example of an irregular Class B airspace ceiling altitude. Due to the high volume of air traffic, the Class B ceiling in Atlanta reaches up to 12,500 feet MSL.
Class B airspace locations must include at least one primary airport around which the Class B airspace area is designated. General Design. There is no standard Class B design. Instead, the size and shape of the Class B airspace area will vary depending upon location-specific ATC operational and safety requirements.