[Code of Federal Regulations]
[Title 14, Volume 2]
[Revised as of January 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 14CFR77.29]

[Page 165]
 
                     TITLE 14--AERONAUTICS AND SPACE
 
CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION 
                               (CONTINUED)
 
PART 77_OBJECTS AFFECTING NAVIGABLE AIRSPACE--Table of Contents
 
                     Subpart C_Obstruction Standards
 
Sec.  77.29  Airport imaginary surfaces for heli ports.

    (a) Heliport primary surface. The area of the primary surface 
coincides in size and shape with the designated take-off and landing 
area of a heliport. This surface is a horizontal plane at the elevation 
of the established heliport elevation.
    (b) Heliport approach surface. The approach surface begins at each 
end of the heliport primary surface with the same width as the primary 
surface, and extends outward and upward for a horizontal distance of 
4,000 feet where its width is 500 feet. The slope of the approach 
surface is 8 to 1 for civil heliports and 10 to 1 for military 
heliports.
    (c) Heliport transitional surfaces These surfaces extend outward and 
upward from the lateral boundaries of the heliport primary surface and 
from the approach surfaces at a slope of 2 to 1 for a distance of 250 
feet measured horizontally from the centerline of the primary and 
approach surfaces.

[Doc. No. 1882, 30 FR 1839, Feb. 10, 1965, as amended by Amdt. 77-9, 36 
FR 5971, Apr. 1, 1971; 36 FR 6741, Apr. 8, 1971]