ITEM 522 STRUCTURAL PLATE CORRUGATED METAL STRUCTURES ON FOOTINGS
522.01
Description
522.02
Materials
522.03 General
522.04 Method
of Measurement
522.05 Basis of
Payment
522.01 Description. This work consists of
furnishing structural plate corrugated metal structures of specified dimensions,
including metal bearing angles or channels as required, and erecting same on
concrete footings.
522.02 Materials. Furnish plates and bolts
conforming to 707.03 or 707.23. Furnish steel bearing angles
or channels conforming to 707.03 or 711.01. Furnish aluminum bearing
angles or channels conforming to 707.23.
522.03 General. Properly support the metal
bearing angle or channel in the position shown on the plans before placing
footing concrete.
Erect
the plates according to the manufacturer’s assembly instructions. Hold
the unsupported edges of all plates in position using temporary props.
Progressively install a sufficient number of bolts to hold the plates in
position. Do not tighten bolts until tightening will not interfere with the
adjustment and matching of additional sections. If using drift pins or
pry bars, take care to prevent chipping or injury to the galvanized
coating. Tighten the bolts to a final minimum torque of 100 foot-pounds
(140 Nm).
Within
the limits of backfill, field coat the exterior of the 707.03 conduit above the limits of the
bedding. The coating material and application shall conform to AASHTO M 243M. Thoroughly seal around all plate
seams and bolts. Allow asphalt mastic material to dry for 48 hours and
tar base material to dry for 28 hours before placing the conduit backfill.
Backfill according to the requirements
for 611.
522.04 Method of Measurement. The Department
will measure the actual number of feet (meters) of the corrugated metal
structure, installed in place. The Department will determine the length
by taking the average of the two side measurements, end to end, at the point of
bearing.
Excavation
will be paid for under Item 203 or 503 as shown on the plans.
Concrete
footings will be paid for as a separate pay item.
522.05 Basis of Payment. The
Department will pay for accepted quantities at the contract price as follows:
Item
Unit
Description
522
Foot
(Meter)
___' ___" (___ mm) Structural Plate
Corrugated Metal Structure,
___-inch (___ mm)