522.04 451 galvanized coating. Tighten the bolts to a final minimum torque of 100 foot -pounds (140 Nm). Within the limits of backfill, field coat the ex terior 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, inst alled 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 (___ m m) ITEM 523 DYNAMIC LOA D TEST
523.01 Description
523.02 General
523.03 Equipment
523.04 Test Report
523.05 Basis of Payment
523.01 Description. This work consists of establishing a driving criteria for all
the piles of a specified shape, cross -section, and ultimate bearing capacity or as specified on the plans to be installed in the structure. This shall be accomplished by applying dynamic loads with a pile hammer during driving of production piles to determine driving requirements. Apply the dynamic loa d to the piles using a pile hammer that is operating at its normal operating level. Perform restrike tests when specified in the plans
523.02 General. Perform dynamic tests on a minimum of two successfully
tested piles. A successfully tested pile is one that provides adequate data to provide pile driving criteria as described in 523.04. Perform signal matching analysis of the dynamic test data on at least one of the two test piles. Perform the test according to ASTM D 4945 to determine driving require ments to achieve the required ultimate bearing values for the piles to be installed in the structure. Perform restrike tests after piles have been driven and a minimum time specified in the plans has elapsed. When performing a restrike, warm the hammer bef ore