Each Strong Frame™ ordinary moment frame includes all the hardware necessary for assembly:
- (16) 7/8" x 3" high-strength bolts ASTM A325
- (16) 7/8" dia. heavy hex nuts
- (16) High-strength washers
- (8) 5/8" dia. cut washers
- (16) Direct Tension Indicator (DTI) washers
(optional - see Bolt-Tightening Requirements)
- (12) 5/8" dia. heavy hex nuts
- (4) 5/8" x 2 1/2" carriage bolts
- (16) Finger shims (optional)
- Installation sheet
- (1) 0.15" feeler gauge
DTI washer
(silicone side facing steel beam)
High-strength
washer
Heavy
hex nut
Installation Instructions
- Install anchorage into the footing per the Designer’s specifications. See OMFSL Anchorage Assembly and OMFAB Anchorage Assembly for more information on anchorage options.
- Remove the form template OMF-TPL and install 5/8" dia. heavy hex nuts onto the anchors, lowering them all the way down to the concrete. These will be used to level the frame.
- Lay out the components of the Strong Frame™ moment frame horizontally for assembly prior to positioning onto the anchor bolts.
- Bolt the columns and beams together using high‑strength bolts and washers (included) in accessible holes. Optional DTI washers are also included and should be used where required (see Bolt-Tightening Requirements). Do not fully tighten at this time.
- Lift the frame (using proper equipment) and position it onto the anchor bolts, so that it rests on the first set 5/8" heavy hex nuts. The top nailer should be 1 1/2" below the top of adjoining walls.
- Provide temporary diagonal bracing of the moment frame, as required, until it is tied into the floor or roof framing above.
- Install the remaining bolts connecting the columns and beam, do not fully tighten at this time.
- Plumb one column and adjust the temporary bracing as required. Install the 5/8" heavy hex nuts and washers onto the anchor bolts and fully tighten with wrench (1/2 turn past finger tight).
Note: A 3/4"– 2" gap is required under each baseplate for non-shrink grout (1 1/2" typical)
- Plumb the second column and level the beam, making sure to keep the column plumb. Install the remaining 5/8" heavy hex nuts onto the anchor bolts, finger-tight against the base plate.
- Return to the first column and fully tighten all 7/8" column-to-beam bolts. (See Bolt-Tightening Requirements for information on bolting and the use of DTI washers.)
- Check that the beam is still level and the second column is plumb, and adjust the temporary bracing on the second column as required.
- Fully tighten the 7/8" column-to-beam bolts and then the nuts on the anchor bolts on the second column. (See Bolt-Tightening Requirements for information on bolting and the use of DTI washers.)
- Install non‑shrink grout under each base plate (3/4" minimum) following the manufacturer’s instructions and local building codes (may require inspection).
- Install wood nailer blocks on top of each column, using the carriage bolts provided (12" and 15" columns have four bolt holes, only two bolts required).
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