c. Linear Turbine Configuration. Place a light on each turbine positioned at each end of the line or string of turbines. Lights should be no more than ½ statute mile, or 2640 feet from the last lit turbine. In the event the last segment is significantly short, push the lit turbines back towards the starting point to present a well balanced string of lights. High concentrations of lights should be avoided.
d. Cluster Turbine Configuration. Select a starting point among the outer perimeter of the cluster. This turbine should be lit, and a light should be placed on the next turbine so that no more than a ½ statute mile gap exists. Continue this pattern around the perimeter. If the distance across the cluster is greater than 1 mile, and/or the terrain varies by more than 100 feet, place one or more lit turbines at locations throughout the center of the cluster.
e. Grid Turbine Configuration. Select each of the defined corners of the layout to be lit, and then utilize the same concept of the cluster configuration as outlined in paragraph d.
f. Special Considerations. On occasion, one or two turbines may be located apart from the main grouping of turbines. If one or two turbines protrude from the general limits of the turbine farm, these turbines should be lit.
2/1/07AC 70/7460-1K CHG 2
34 Chap 13
APPENDIX 1: Specifications for Obstruction Lighting Equipment Classification
APPENDIX
Type Description L-810 Steady-burning Red Obstruction Light L-856 High Intensity Flashing White Obstruction Light (40 FPM) L-857 High Intensity Flashing White Obstruction Light (60 FPM) L-864 Flashing Red Obstruction Light (20-40 FPM) L-865 Medium Intensity Flashing White Obstruction Light (40-FPM) L-866 Medium Intensity Flashing White Obstruction Light (60-FPM) L-864/L-865 Dual: Flashing Red Obstruction Light (20-40 FPM) and Medium Intensity Flashing White Obstruction Light (40 FPM) L-885 Red Catenary 60 FPM FPM = Flashes Per Minute
TBL 4 34 Chap 13 A1-1Appendix 1
AC 70/7460-1K CHG 1 8/1/00
PAINTING AND/OR DUAL LIGHTING OF CHIMNEYS, POLES, TOWERS, AND SIMILAR STRUCTURES
• = L-856
• = L-864 or (L-864/L-865)
• = L-810 20 feet (6m) T As low as Appurtenance over 40° (12m) More than 250ft. (77m) More than 500ft (153m) but not more than but not more than 700ft. (213m) 700ft. (213m) FIG 1 A1-2 Appendix 1
- L-864ORL-865 = L-8640RL-865
- ORIL-864L-865 ~ OR (L-8641-865) Communications Antenna Top of Structure Top of Antenna Support Structure 10' ax.
Overall AGL height when determining light levels. Overall AGL height when determining light levels Obstruction lights can be mounted within 10 (3m) trom the overall height.
Intermediate lighting not shown. Overall AGL height if more than 200' (61m), but not more than 500' (153m).
FIG 2 Appendix 1 A1-3
AC 70/7460-1K CHG 1 8/1/00
PAINTING AND LIGHTING OF WATER TOWERS, STORAGE TANKS, AND SIMILAR STRUCTURES The number of light units recommended depends on the diameter of the structure More than 150ft.
(45m) but not more than 250ft. (77m) More than 150ft.
(45m) but not more than 250tt. (77m) FIG 3 A1-4 Appendix 1
PAINTING AND LIGHTING OF WATER TOWERS ANDE SIMILAR STRUCTURES —= = L-864
• = L-810 The number of light units recommended depends on the diameter of the structure More than 150 ft.
(45m) but not more than 250ft. (77m) FIG 4 Appendix 1 A1-5
AC 70/7460-1K CHG 1 8/1/00
PAINTING OF SINGLE PEDESTAL WATER TOWER BY TEARDROP PATTERN
ANYTOWN, USA FIG 5 A1-6 Appendix 1
LIGHTING ADJACENT STRUCTURES Inboard lights recommended on all levels above height of shorter structure Inboard lights 1795' may be omitted
• (242m) 545'
• • (166m) ,534 = (163m) 800' (244m) 550' 275' (84m) : (168m)
• 270' (82m)
• 267
• (81m) Minor adjustments in vertical placement may be made to place lights on same horizontal plane.
Lights on both structures be synchronized FIG 6 Appendix 1 A1-7
AC 70/7460-1K CHG 1 8/1/00 Lighting Adjacent Structure
• = L 85€ • = L 856 750' AGL (229m)
• Lowest level should be above Structures of equal height. Number of levels adjacent structure depends upon height of structure. Lights on both structures to be synchronized.
• = L 856 755' (230m) 4 • P (154m) 506' (244m) 245' (75m) l 0 0 757) 250 AGL (77m) One structure higher than the adjacent structure One structure higher than the adjacent structure and light levels are on same horizontal plane and light levels are on same horizontal plane.
Lights on both structures to be synchronized.
FIG 7 A1-8 Appendix 1
Lighting Adjacent Structure +a→ —b— a-20' (6m) or less b-Exceeding 20' (6m) but not more than 100' (31 m) 1/3
• 1/3 800' AGL (244m) 00 250' AGL (77m) 1/3 FIG 8 Appendix 1 A1-9
AC 70/7460-1K CHG 1 8/1/00
HYPERBOLIC COOLING TOWER The number of light units recommended depends on the diameter of the structure -aa-Exceeding 100' (31m) mw FIG 9 A1-10 Appendix 1
BRIDGE LIGHTING
FIG 10 34 Chap 13 A1-11 Appendix 1