AC 70/7460-1B 1 Oct 72 CHAPTER 8. STANDARDS FOR DUAL LIGHTING SYSTEMS ON OBSTRUCIIONS TO AIR NAVIGATION
23. PURPOSE. To provide the specifications for dual obstruction lighting systems to be placed on obstructions to air navigation.
24. APPLICATION. obstruction lighting of buildings, smokestacks and similar obstructions, except transmission lines and their support structures. These standards do not require modification of existing marking and lighting; however The general specifications which follow apply to the the FAA may recomnend that marking and lighting displayed on an existing structure, that would come within the scope of these standards, be modified if that structure is altered or replaced by a similar structure.
25. SPECIFICATIONS.
a. Dual Obstruction Lighting Systems on Snokestacks and Similar Obstructions. Where both the red obstruction lighting and high intensity white obstruction lighting systems are to be used for night and day obstruction lighting respectively, the obstruction lights should be installed as follows:
(1) Structures not more than 150 feet: At a near top level apply 18b (2).
(2) Structures more than 150 feet but not more than 300 feet:
(a) Red lights, apply 19b(2) (b).
(b) White lights, at a near top level apply 21a(1).
(3) Structures more than 300 feet but not more than 450 feet:
(a) Red lights, apply 19b (2) (c).
(b) White lights, 1 At a near top level apply 2la(1).
At approximately two-thirds of the overall height apply 21a(2).
(4) Structures more than 450 feet but not more than 600 feet:
(a) Red lights, apply 19b(2) (d).
(b) White lights, 1 At a near top level apply 2la(1).
At approximately one-half of the overall height apply 2Ia(2).
Page 44 Chap. 8 Dar 22
1 Oct 72 AC 70/7460-1B
(5) Structures more than 600 feet but not more than 750 feet:
(a) Red lights, apply 19b(2) (e).
(Б) White lights, 1 At a near top level apply 2la(1).
2 At approximately four-fifths and two-fifths of the overall height apply 21a(3).
(6) Structures more than 750 feet but not more than 900 feet:
(a) Red lights, apply 19b(2) (f).
(b) White lights, 1 At a near top level apply 2la(1).
2 At approximately two-thirds and one-third of the overall height apply 2la(3).
(7) Structures more than 900 feet but not more than 1000 feet:
(а) Red lights, apply 19b (2) (g).
(b) White lights, 1 At a near top level apply 2la(1).
2 At approximately five-sevenths and two-sevenths of the overall height apply 21a(3).
(8) Structures more than 1000 feet but not more than 1050 feet:
(a) Red lights, apply 19b(2) (g).
(b) White lights, 1 At a near top level apply 21a(1).
2 At approximately five-sevenths, four-sevenths and two-sevenths of the overall height apply 2la(3).
(9) Structures more than 1050 feet but not more than 1200 feet:
(a) Red lights, apply 19b (2) (h).
(b) white lights, 1 At a near top level apply 21a(1).
At approximately three-fourths, one-half, and onefourth of the overall height apply zia(3).
(10) Structures more than 1200 feet but not more than 1350 feet:
(a) Red lights, apply 19b(2) (i).
White lights, 1 At a near top level apply 2la(1).
2 At approximately seven-ninths, four-ninths, and two-ninths of the overall height apply 2la(3).
Chap. 8 Darn 1.5
AC 70/7460-1B 1 Oct 72 * (11) Structures more than 1350 but not more than 1400 feet:
(a) Red lights, apply 19b(2) (j).
(b) White lights, 2 At approximately four-fifths, one-hall, 1 At a near top level apply 2la(1). fifth of the overall height apply 2la(3). and one-
(12) Structures more than 1400 feet but not more than 1500 feet: (a) Red lights, apply 19b(2)(j). White lights, 1 At a near top level apply 21a(1). At approximately four-fifths, three-fifths, two- 21a(3). fifths, and one-fifth of the overall height apply
(13) Structures more than 1500 feet but not more than 1650 feet:
(b) (a) Red lights, apply 19b (2) (k). White lights, At a near top level apply 2la(1). At approximately nine-elevenths, seven-elevenths, height apply 2la(3). tour-elevenths, and two-elevenths of the overall
(14) Structures more than 1650 feet but not more than 1800 feet: (b) (a) Red lights, apply 19b(2) (1). White lights, I At approximately five-sixths, seven-twelfths, five- 1 At a near top level apply 21a(1). 21a(3). twelfths, and one-sixth of the overall height apply
(15) Structures more than 1800 feet but not more than 1950 feet:
(a) Red lights, apply 19b (2) (m).
(b) White lights, 1 At a near top level apply 2la(1). At approximately eleven-thirteenths, nine-thirteenths, of the overall height apply 21a(3). six-thirteenths, four-thirteenths, and two-thirteenths Page 46 Chap. 8
1 Oct 72 AC 70/7460- 1B
(16) Structures more than 1950 feet but not more than 2100 feet:
(a) Red lights, apply 19b(2) (n).
(b) White lights, 1 At a near top level apply 2la(1).
At approximately six-sevenths, nine-fourteenths, onehalf, five-fourteenths, and one-seventh of the overall height apply 21a(3).
b. Antenna Towers and Similar Open Structures. Not applicable to these types of structures at this time. * Chap. 8 Par. 25 Page 47 (and 48)
1 Oct 72 AC 70/7460- 1B Appendix 1
DOUBLE OBSTRUCTION
LIGHT FITTING (Fresnel Globe)
SINGLE OBSTRUCTION
LIGHT FITTING (Fresnel Globe) 300 mm ELECTRIC CODE BEACON (Fresnel Lens) 24-Inch Double End 24-Inch Single End 36-Inch Double End ROTATING BEACONS Pace 1
AC 70/7460-1B 1 Oct 72 Appendix i A-More than 150 ft. but not more than 300 fl.
A -Not more than 150 fl.
A-More than 300 ft. but not more than 450 ft.
PAINTING AND LIGHTING OF TOWERS, POLES AND SIMILAR OBSTRUCTIONS Page 2
1 Oct 72 AC 70/7460-1B Appendix i Not less than 5 ft.
nor more than 10 ft.
Not less than 5 ft.
nor more than 10 ft Special double obstruction light
SUSPENSION TYPE
OBSTRUCTION LIGHT
INSTALLATION A-More than 300 ft. but not more than 450 fl.
A-Not more than 150 ft.
PAINTING AND LIGHTING OF SMOKESTACKS AND SIMILAR OBSTRUCTIONS Page 3
AC 70/7460-1B Appendix 1 1 Oct 72
LIGHTING MARKING LIGHTING MARKING A-More than 150 ft. but not more than 300 fl. A and B- 15 ft. A and B-Not more A -5 ft. or more B-Not more than 150 ft. or more than 150 ft. B-Less than 15 ft.
PAINTING AND LIGHTING OF WATER TOWERS AND SIMILAR OBSTRUCTIONS Page 4
1 Oct 72 AC 70/7460-1B Appendix 1
LIGHTING
MARKING A-More than 150 ft. but not more than 300 ft. A and B- 15 ft. or more B-Not more than 150 ft.
PAINTING AND LIGHTING OF WATER TOWERS AND SIMILAR OBSTRUCTIONS
AC 70/7460-1B Appendix i 1 Oct 72
- B Á-More than 150 fl. but not more than 300 fl. LIGHTING A and B-15 ft. or more MARKING A and B-Not more LIGHTING A-5 ft. or more MARKING than 150 ft. B- Less than 15 ft.
B-Not more than 150 ft.
PAINTING AND LIGHTING OF GAS HOLDERS AND SIMILAR OBSTRUCTIONS Pade f
1 Oct 72 S# 20/74601
PAINTING OF SI
AC 70/7460-1B Appendix 1 1 Oct 72 BRIDGE Page 8