|

| From underside of
floor, locate the exact position of the sag or soft spot by
having somebody above tap on the floor, with knuckles or rubber
mallet as to not damage floor covering. |
|

| Pre-assemble
angle plates and support arms using hex bolts, washers and nuts.
Then screw brackets to the floor centering between the joists. |
|

| Tap support arms
with a hammer to remove a sag or to firm up floor. |
|

| Screw support arms
to joists. Make sure all fasteners are tight. |
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