UFC 3-535-01
17 November 2005
13-9.5.7.1 Designed for the appropriate wind speed and ice load based on latest
revision of ANSI/EIA-222, Structural Standards for Steel Antenna Towers and Antenna
Supporting Structures.
13-9.5.7.2 Steel pipe and solid rod legs with minimum yield strength of 345 MPa (50
ksi). Braces, plates and bolts must be of size and strength required by design. Welding
must be by AWS Gas Metal Arc Process, by AWS certified welders.
13-9.5.7.3 Hot-dipped galvanized inside and out, after fabrication, in accordance with
ASTM A-123, Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron
and Steel Products E1-1998, for structural materials and ASTM A-153, Standard
Specification for Zinc Coating (Hot-Dip) on Iron and Steel Products E1-1998, for
hardware.
13-9.5.7.4 Service platform to be fabricated of the same materials as the tower.
Platform must accommodate the safe movement and activity of maintenance personnel
(via railing or gate/trap door, for example) and the mounting and lowering of the
telescoping LIR mast. The working facilities (such as platform, hand or guardrails) must
meet the latest revision of ANSI/EIA-222.
13-9.5.7.5 Service ladder must include a safety climbing device (e.g., rigid rail or
cable style hook-up) for the safe ascent/descent of maintenance personnel. The service
ladder must be a fixed ladder meeting the latest revision of ANSI/EIA-222, and climbing
device must meet the requirements of ANSI A14.3-1984, Fixed Safety Requirements for
Ladders.
13-9.5.7.6 Foundation design must, as a minimum, be adequate for a 190 kPa (4,000
psf) soil bearing capacity, and must be adequate to meet the maximum reaction loads
of the tower as defined by the tower designer.
13-9.6
Runway End Identifier Lights (REIL)
See paragraph 3-6. Use equipment meeting FAA-E-2628 or FAA AC 150/5345-51, Type
L-859F for omni-directional REIL installations. (See Figure 13-8.)
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