CHAPTER If, SECTION 3
from the elevator and ladder located on the
opposite side of the tower, a catwalk was framed
with the platform members. A wire rope catenary
supported a %-inch styroflex from the platform
to Station 71 located below.
STATION:
90
SITE:
Nan
USER:
EG&G
PURPOSE:
Observation Tower
PARTICIPATION: All Bikini Events, and All
Eniwetok Events, Except
1 and 15
DESIGN PST:
None
CONSTRUCTION: 4-1-58,/7-25-58
An existing 300-foot triangular steel tower,
20 feet on a side with corner guys at three levels,
was rehabilitated to REDWING condition.
Modification to the tower included the addition
of Station 82.02 to the 200-foot level and a new
power line to the 275-foot level. Included in this
tower was the cab, Station 1510.
STATION:
91
SITE:
Elmer
USER:
EG&G
PURPOSE:
Observation Tower
PARTICIPATION: All Events
DESIGN PSI:
None For Tower (See
other Stations on Tower
for their Design Loads)
a Boe
CONSTRUCTION: 10-2-57/8-16-58
This 300-foot steel tower, in stock at EPG
but not previously erected, was triangular in
plan section, 20 feet on a side, similar to Station
90 on Nan, except for guys at the 250-foot level
“ay
aby
(Neg. No. W-V-255-2)
Figure No. 2-30.
300-Foot Tower Station 91
and Various Platform Stations.
only, The existing connection details were modi-
fied at the 250-foot level for fastening more
rigid guys to limit tower deflection and torsion.
Two guys splayed at each of the three corners
to accomplish this. The cab in stock was not
utilized but was replaced by a new structure
discussed under Station 1511. After the bare
tower was erected and when all the stations
located on the tower were made known, the
tower framing was reinforced for anticipated
loads by field welding two structural angles to
the main tower legs up to the 250-foot level, replacing the diagonal bracing between the 25- and
75-foot levels and by adding diagonal bracing
between the 75- and 150-foot levels and between
the 200- and 28715-foot levels. To protect
against uplift, additional concrete was poured
around the tower footings.
Page 80
The elevator car was modified to include
a scissors-type gate, and the elevator hoist was
modified to utilize a slack rope device which
maintained tension on the elevator support
cables. The tower was provided with obstruction
lights at the top and at the 150-foot level and
ground floodlights at the 25-foot level. The power
distribution panel and signal terminal cabinets
were located in an enclosure at the base of the
tower. A steel framed, aluminum covered shelter,
20x15x10-foot high, housed the elevator hoist on
the ground and was located about 45 feet from
the tower centerline.