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... . 3. ICE. Two types of ice cause problems. Rime ice is similar to what is found in a refrigerator. It weighs about 17 pounds per cubic foot and is quite porous. Glaze ice is different, and occurs only in certain geographic areas and elevations where the temperatures drop below 32 degrees. It is quite common in lower latitudes; it accumulates when there is a slight drizzle. This type of ice has a density of 54 pounds per cubic foot. A failure to install de-icing equipment results in excess weight ... into account both the average winds and the peak winds. Climatologists can provide information on any special or unusual wind conditions. To prevent wind damage, towers must undergo structural modifications if they do not currently meet or exceed the highest wind load expected. Manufacturers should be consulted for specific recommendations. Tower space is often leased for local telephones, microwave dishes, side-mounted antennas, and so forth without considering the impact of the additional weight or wind impedance on the tower's structural integrity. Adding radomes to antennas will reduce the wind load. ... loss. Basically, the type of tower, quality of construction, and installation must be appropriate for the topography and able to withstand the climatological extremes in the area where the facility is located. 2. Lightning. Lightning accounts for approximately 20 percent of all tower property claims, and the higher the tower, the greater the possibility of lightning losses. Here is a checklist to help minimize tower damage by lightning. Lightning rods should project well above the tower beacon. Use binoculars to verify that the rods are in place and ...