5
9/18 Rev B
STEP 2A - COLUMN INSTALLATION (POURED FOUNDATION)
2.1
Cast in Anchor Bolts requirements:
A) All groutless columns using leveling nuts require cast-in anchor bolts.
B) Eight hole base plates are standard.
C) 3/4” or 7/8” diameter anchor bolts are used for most standard configurations with 1” diameter being
required on the largest sizes. Refer to the General Arrangement Drawing for anchor bolt size.
D) Anchor bolts specified are ASTM F1554 Grade 36. Galvanized rods with a tacked nut are
recommended. If plain bolts are used, coat the exposed portion using the cold galvanizing spray paint
provided (anchor bolts supplied by others).
E) With the double nut moment base design, shear forces are transferred through the bolts. Therefore bolt
holes in column base plate are not oversized. Anchor bolt templates are recommended to precisely hold
anchor bolts in correct alignment during pouring and curing of concrete (anchor bolt templates supplied
by others).
F) Anchor bolts are embedded three quarters of the footer depth with 4” to 6” of threaded rod exposed.
G) Galvanized grade DH nuts and galvanized grade F436 flat washers are recommended (anchor nuts and
washers supplied by others).
2.2
Pour the footing according to the
foundation dimension on the General
Arrangement Drawing and in
diagram
2A
with the anchor bolts in place.
Verify all footings are at the same
elevation unless otherwise detailed
on General Arrangement Drawing.
Protect protruding threads on anchor
bolts until columns are installed.
Note:
Foundation requirements are
based on a soil pressure of 2500 lbs
per square foot. Concrete
recommended for foundation is 3000
lbs. per square inch of compressive force.
Note:
Foundation/concrete must cure 7 days prior to column installation. Foundation/concrete must cure 28
days prior to using fall arrest system.
NOTE:
Monorail should not deviate by more than 0.5 degrees from horizontal. If application requires
foundations at different elevations to achieve this, verify the General Arrangement Drawing details this so
that columns can be fabricated to custom individual lengths.
WARNING
Verify foundation depth meets local codes to prevent frost heave. Contact Gorbel if revision to foundation depth on
the General Arrangement Drawing is required. This may affect square width dimension.
Diagram 2A.
Cast-in Poured Foundation Detail.
ANCHOR BOLT
ALIGNMENT
TEMPLATES
REINFORCING BARS
5/8" TOP, 3/4" BOTTOM
ON 12" CENTERS
F1554 GR. 36
ANCHOR RODS
TACK GALVANIZED GR.
DH NUTS HERE TO FORM
HEADED ANCHOR BOLT
F436 WASHERS
FOUNDATION
SQ. WIDTH
FOUNDATION
DEPTH
3/4 OF
DEPTH
2 1/2"
4" TO 6"
3"
WARNING
Consult a qualified engineer if you deviate from the recommended dimensions provided in this manual or on the
General Arrangement Drawing. Gorbel. Inc. is not responsible for any deviation from these foundation requirements.
