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<br />AC 150/5300-13 ClfG 5
<br />
<br />" (c) When the.esholds are
<br />staggered and the approach is to the far threshold, the
<br />minimum 2,500-foot (762 m) separation requires an
<br />increase of 100 feet (30 m) for every 500 feet (152 m)
<br />of threshold stagger.
<br />
<br />209. RUNWAY TO PARALLEL TAXIWAY
<br />AND TAXILANE SEPARATION,
<br />
<br />a. Standards. Tables 2-1 and 2-2 present
<br />the runway centerline to parallel taxiway/taxilane
<br />centerline separation standard. This distance is such to
<br />satisfy the requirement that no part of an aircraft (tail
<br />tip, wing tip) on taxiway/taxilane centerline is within
<br />the nmway safety area or penetrates the obstacle free
<br />zone (OFZ). The computer program cited in
<br />appendix II may be used to determine the increase to
<br />these separation distances for elevation.
<br />
<br />b. Recommendations. To have room for
<br />the acute-angled exit taxiway, provide a nmway
<br />centerline to parallel taxiway centerline of at least 400
<br />feet (120 m) for Airplane Design Groups I and II,
<br />500 feet (ISO m) for Airplane Design Group III, and
<br />600 feet (180 m) for Airplane Design Groups IV, V,
<br />and VI.
<br />
<br />210. BUILDING RESTRICI'ION LINE lBRL).
<br />A BRL should be placed on an airport layout plan for
<br />identifying suitable building area locations on airports.
<br />The BRL should encompass' the nmway protection
<br />Z<ines, the runway object free area. the runway
<br />visibility zone (see p8ragraph 503), NA V AID aitical
<br />areas, areas ~uired for terminal instrument
<br />procedures, and airport traffic control tower clear line
<br />of sight
<br />
<br />~f~~mBJc;Cf CLEARING CRITERIA. Safe and
<br />.., effi~perations at an airport require that certain
<br />areas on and near the airport be clear of objects or
<br />restricted to objects with a certain function,
<br />com~ition, and/or height The object clearing
<br />aiteri8 subdivides the 14 CPR Part 77, Subpart C,
<br />airspace and the object free area (OFA) grolDld area by
<br />type of objects tolerated within each subdivision.
<br />Aircraft are controlled by the aircraft operating rules
<br />and not by this aiteria.
<br />
<br />a. Standards.
<br />requirements are as follows:
<br />
<br />Object
<br />
<br />clearance
<br />
<br />(1) ObiedFree-Area (OFA). Object
<br />free areas require clearing of objects as specified in
<br />paragraph 307, Runway Object Free Area. and
<br />paragraph 404, Taxiway and Taxilane Object Free
<br />Area (OF A).
<br />
<br />12
<br />
<br />2114/97
<br />
<br />(2) Run.' and Taxiwav Safety
<br />Areas. Runway and taxiway safety areas require
<br />clearing of objects, except for objects that need to be
<br />located in the runway or taxiway safety area because of
<br />their function. Objects higher than 3 inches (7.6 cm)
<br />above grade should be constructed on low impact
<br />resistant supports (frangible mounted structures) of the
<br />lowest practical height with the frangible point no
<br />higher than 3 inches (7.6 cm) above grade. Other
<br />objects, such as manholes, should be constructed at
<br />grade. In no case should their height exceed 3 inches
<br />(7.6 em) above grade. Underground fuel storage
<br />facilities should not be located within runway and
<br />taxiway safety areas (see AC 150/5230-4), Aircraft
<br />Fuel Storage, Handling, and Dispensing on Airports).
<br />Tables 3-1, 3-2, 3-3, and 4-1 specify runway and
<br />taxiway safety area standard dimensions.
<br />
<br />(3) Obstacle Free Zone (0 FZ).
<br />Obstacle Free Zones require clearing of object
<br />penetrations, except for frangible visual NA V AIDs that
<br />need to be located in the OFZ because of their function.
<br />Paragraph 306 specifies OFZ standard dimensions.
<br />
<br />(4) Threshold. The threshold obstacle
<br />clearance surfaces, defmed in Appendix 2,
<br />paragraph 5, require clearing of object penetrations.
<br />
<br />(5) NA V AIDs. Certain areas require
<br />clearing for the establishment and operation of
<br />NA V AIDs. These NA V AID critical areas are depicted
<br />in chapter 6.
<br />
<br />.::\
<br />
<br />(6) 14 CFR Part 77 Obstructions' to
<br />Air Navi2ation. Obstructions. to air navigation must
<br />be removed unless an FAA aeronautical study, based
<br />on proposed operations, determined otherwise. To
<br />determine otherwise, the FAA must find no substantial
<br />adverse effect as defined in Order 7400.2, Procedures
<br />for Handling Airspace Matters, Chapter 7, Evaluating
<br />Aeronautical Effect, Section I, General The FAA,
<br />norma1Iy, limits aeronautical studies of existing objects
<br />to obstructions to air navigation which are not included
<br />in the aiteria cited in paragraphs 211a(I) through (5).
<br />
<br />(7) Runwav.' Protection ZOne, (RPZ).
<br />The RPZ requires clearing of incompatIole objects and
<br />activities as specified in paragraphs 212a(IXa) and
<br />212a(2).
<br />
<br />(8) General. Other objects which
<br />require clearing are those which generally can have an
<br />adverse effect on the airport. These include objects in
<br />the inner part of the approach area (coinciding with the
<br />RPZ) such as fuel handling and storage facilities,
<br />smoke and dust generating activities, misleading
<br />lights, and those which may create glare or attract
<br />wildlife.
<br />
<br />Chap 2
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