TM 32-5985-342-14&P
Figure 2-3. Hoist Pier
(5) Refer to figure 2-6. Install tower top
(2) Refer to figure 24, sheets 2 and 3. Use
braces Nos. 7 and 8 (16, 17). Secure with two angle
erection fixture to raise and install three upper tower
braces (12) and four 1/2-inch bolts (13), hex nuts (14),
legs (10) and one upper tower leg (21) to joint braces
and locknuts (15) for each brace.
(17, 24). Secure with four 3/4-inch bolts (11), hex nuts
(12), and locknuts (13) for each leg. Do not torque
(6) Refer to figure 24. Install remaining cable
hardware until upper legs are plumb with lower legs.
braces (15) to tower legs.
d. Upper Brace Installation. Refer to figure 24
(7) Tension all cable braces as follows:
unless otherwise indicated.
(a) Assemble
the
cable
hoist,
(1) Use erection fixture to raise and install
tensioning cable, and dynamometer as shown in figure
one horizontal brace (16), one horizontal brace (23), and
2-7.
two horizontal braces (18). Secure with two 3/4-inch
CAUTION
bolts (14), hex nuts (12), and locknuts (13) for each
Keep tower legs plumb and straight
brace.
to prevent unwanted deflection and
(2) Install four comer braces (26) to upper
prestressing of leg members.
horizontal braces. Secure with two' 1/2-inch bolts (27),
(b) Crank
cable
hoist
until
hex nuts (28), and locknuts (29) for each comer brace.
dynamometer indicates required tension.
Tighten
(3) Install top tower braces Nos. 1 through 4
turnbuckle (33) until dynamometer reading begins to
(5, 20, 22, and 25) to top tower legs. Secure with four
drop. Cable hoist may now be removed.
3/4-inch bolts (14), hex nuts (12), and locknuts (13) for
NOTE
each brace.
The reading on the dynamometer. is
(4) Refer to figure 2-6. Install tower top
one-half the actual tension being
braces Nos. 5 and 6 (19, 11). Secure with two angle
applied, because the cable hoist line
braces(12) and four 1/2-inch bolts (13), hex nuts (14),
is doubled. Multiply readings by two
and locknuts (15) for each brace.
to obtain proper values listed below.
2-7
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