Hennepin County

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PROJECT QUESTION: Our sheeting supplier has stated that the PZC-37 & PZC-39 cover plated sections are still in trial running and are not currently being made. Please provide an alternate section to use in place of these.

Question: Our sheeting supplier has stated that the PZC-37 & PZC-39 cover plated sections are still in trial running and are not currently being made. Please provide an alternate section to use in place of these.

Response: The 37-CP and 39-CP sections in question are produced by welding plates onto a PZC-26 section. The PZC-26 is currently available in Minnesota; it is the welding process that makes the section more unique step in the production. Speaking with the local sales rep from LB Foster, they acknowledged that the sections are carried in their catalogue and can be made. The LB Foster Rep indicated that the ?trial? designation referred to the additional time and cost associated with the uniqueness of the section and the fact that they are not in the regular production schedule.

The sheet pile plans do include a note that indicates the Contractor may substitute an alternate piling system or section provided it meets the minimum required section modulus. Contractors should note that calculations provided by a registered engineer for walls above 10 feet in height are required in the special provisions. Research indicates an alternate to the PZC 37-CP and PZC 39-CP sections specified that Contractors could consider is a PZ 40 section produced by Skylinesteel (scheduled to be rolled in August). Manufacturer?s representatives indicated that cover plates (typically 1/4 in. or 3/8 in.) could be scheduled to be welded to the PZ 40 section by late September, 2014. With the exception of the temporary walls N1 and N2, and a small portion of Wall R for shoofly grading, the majority of the railroad retaining walls X,P,Q,R would not need to be begin installation until the late winter or spring of 2014-2015.