STEP 2A - COLUMN INSTALLATION (POURED FOUNDATION) (CONTINUED)
2.3
Remove top template and clean threads. Lubricate threads with beeswax
(toilet wax ring may also be used). Set leveling nuts at a height of 1/2 of the
anchor bolt diameter from the foundation and make level. Lubricate
washers and place on top of leveling nuts (
diagram 2B
).
2.4
Properly orient column so that knee brace bracket will face
monorail. 4’, 5’ and some 6’ cantilevers do not require knee braces.
For these, orient column top plate so that the longer side is parallel
with the header direction (
diagram 2C
).
2.5
Using proper rigging practices (by others), raise column as
vertical as possible, place over anchor rods and lower into place.
Lubricate and install flat washers and secure with top nuts. Snug
tighten leveling and top nuts in a star pattern (
diagram 2D
).
2.6
After monorail is installed, columns may be slightly tilted away from
overhung hung load to level the monorail if needed. Final anchor
rod nut tightening will be done at the end of the install. For F1554
grade 36 anchor bolts with clean, lubricated threads and bearing surfaces,
snug tight and verification torques are shown (
chart 2A
).
2.7
Install remaining columns (repeat
steps 2.3
through
2.6
).
2.8
Turn of the nut method is used for final tightening of anchor rod nuts. Mark
one flat on top nut and mark a corresponding reference on the base plate for
each bolt. Top nuts should be turned in increments in a star pattern (at least
two full tightening cycles) to achieve 1/6 turn of nut (one flat).
2.9
Verify nut tightening using torque wrench. Leveling nut and top nut
verification torque is shown in
chart 2A
.
2.10
After at least 48 hours, recheck torque on nuts.
WARNING
Leveling nut height from concrete shall not exceed one anchor bolt diameter.
0.5 * OF
ANCHOR BOLT
Diagram 2B.
Installing leveling nuts.
COLUMN KNEE BRACE BRACKET:
ORIENT TO FACE MONORAIL
COLUMN TOP PLATE:
ORIENT SHORT SIDE
TO FACE MONORAIL
Diagram 2C.
Column orientation.
1
2
3
4
5
6
7
8
Diagram 2D.
Anchor nut tightening
pattern.
6
9/18 Rev B
Chart 2A.
Torque chart.
Gr. 36 Anchor
Bolt Dia.
Snug Tight
Torque
Verification
Torque
3/4”
25 ft.-lbs.
75 ft.-lbs.
7/8”
40 ft.-lbs.
120 ft-lbs.
1”
60 ft.-lbs.
180 ft.-lbs.
