(2) Snatch Block. The snatch block, with
(4) Elevator Hoist Assembly.
tower hoist cable looped through it, provides the pulley
component of the elevator hoist assembly is an electric,
power needed to raise or lower the tower.
chain-driven hoist with worm-gear reduction.
electric hoist raises or lowers the elevator assembly. A
(3) Erection Cable.
The erection cable
wire cable passes through a pulley on the tower adapter
connects the snatch block and the multiple4eg sling
and connects the elevator assembly to the electric hoist.
assembly and serves to pivot and hoist the tower when
raised and to restrain the tower when lowered. The
cable is a galvanized aircraft type.
(4) Multiple-Leg Sling Assembly.
in the tower erection kit, together with a winch truck and
multiple-leg sling assembly is a 23-foot assembly with
common hand tools, are used to raise and lower the
two legs. It is attached to Tower Sections Nos. 2 and 3
assembled tower. No other additional heavy equipment,
to elevate the tower.
such as a crane, is needed for this purpose. The kit
consists of a gin pole, a snatch block, an erection cable,
(5) Tower Hoist. The tower hoist provides the
a multiple-leg sling assembly, and a tower hoist.
power for raising the tower and the restraining force
needed for lowering the tower. It is an electric, chain-
driven hoist with worm-gear reduction.
(1) Gin Pole.
The gin pole, which is
assembled from two sections, serves as a lever for
raising or lowering the assembled tower. As the tower is
e. Obstruction Light.
An obstruction light is
raised or lowered, the erection cable rides in the cable
mounted near the tower top to alert aircraft of a potential
slot at the top of the gin pole top section.
Figure 1-2. Tower Erection Kit