Note
Refer to the
paragraph of the
—Rotary runway brooms are more effective at removing snow from in-pavement lighting fixtures than plow
blades and should be used for removal of the last layer.
•
If snow removal is a frequent winter job, the use of high-strength steel snowplow rings is advised to better withstand
the impact of snow plowing and to protect aluminum alloy in-pavement lights. Please refer to FAA Engineering Brief 85 for
further information concerning design and installation of snowplow rings.
Important
The most effective counter-measures in case of damages to in-pavement lights are to slightly increase the plow
blade/cutting edge height above ground and reduction of snowplow speed.
Snowplows
Material and Structure of the Cutting Edge
To protect in-pavement lights from damage during the snow removal it is important that the snowplows are equipped with
plastic cutting edges.
•
The plastic cutting edge should be made of polyurethane, rubber or material of similar consistence and characteristics.
•
The plastic cutting edge should consist of a minimum of plastic segments, accurately aligned and free of steps between
them.
Figure 34: Fig. 1 — Snowplow blade with well aligned segments
•
It is not recommended to have steps between the plastic segments.
•
Vertical or horizontal steps between the plastic segments will increase the risk of luminaire damage. Hitting inset fixtures
with steps between plastic segments should be avoided.
•
Check regularly for wear and abrasion marks on plastic cutting edges.
•
The plastic cutting edges should be replaced when worn down to the wear limit marking. Wear down to the metal portion
of the plow should be avoided in any case.
Figure 35: Fig. 2 — Snowplow blade with wear and steps between segments
AXON Taxiway Inset Lights, 8-inch and 12-inch
Winter Operations: Snow Plowing Guidelines for inset Lights
74
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Summary of Contents for AXON FAA L-852A
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