Fairbanks 12-1492 - 12-1496 A.A.R. Combination Railroad Track/MTS - Manual (Page 28)

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50538-13
ABOVE: Check weighbridge steel for squareness by suspending a plumb bob at the
juncture of the previously established "centering" line, and at the juncture of the middle web
of the main beams. Measure and observe the distance between the plumb bob line and the
web, it should be the same at the top and bottom.
4: When end section has been centered, install the middle section, and connect the sections
together as indicated on the certified drawings. The top flange of the joined main beams
must be level and on the same plane to fully support the track rail without shimming. When
this is completed, and all plates and bolts have been installed, tighten all bolts to their final
torque value.
5: Install the other end section in the same manner, checking to ensure that the centers of
the main beams are centered on the rail cutouts in the concrete approaches for the entire
scale.
Ensure the top flanges of the main beams are level, install all plates and bolts, and tighten all
bolts to their final torque value.
NOTE: Do not weld in the Cross Bracing until the bridge is leveled and the dead load is bal-
anced. See Step 9 on page 35.