Effective with the December 2018 Letting 311 2019 Standard Spec ifications Section 526 Temporary Structures
526.1 Description
1.This section describes the design, construction, maintenance, and removal of a temporary structure of the width specified and of t he necessary waterway area.
526.2 Materials
1.Furnish materials conforming to part 5. The contractor may inc orporate used materials in the structure if they are sound and suitable for the purpose intended.
526.3 Construction
526.3.1 Permits and Coordination
1.The contractor shall obtain any necessary permits as specified in 107.3 and shall coordinate with the issuing agency in securing the permits and complying with the t erms of the permits.
526.3.2 Design
1.Provide plans, signed and sealed by a professional engineer re gistered in the state of Wisconsin, for all temporary structures. Submit one copy of plans to place on file. If the engineer r equests, submit 2 extra copies of plans for review before ordering materials or s tarting construction.
2.The temporary structure shall span the stream and have dimensi ons sufficient to not constrict stream flow during use. The basic desig n criteria shall provide for a 5-year frequency storm with 6 inches of backwater. The plans shall show the minimum bridge length between abutment sheet piling, and the resultant five-year frequency high water elevation. Determine t he minimum low superstructure elevation using the given high water elevation and considering local conditions. The structure shall have the minimum roadway width sp ecified in the special provisi ons as measured between the faces of the railings or curbs, and at right angles to the centerline . Provide vertical abutments designed to prevent spilling fill material i nto the stream. If building a temporary crossing over a stream or lake subject to boating use, constru ct it to provide horizontal and vertical clearance, as the jurisdictional agency may require, adequate for row boats and small power boat s.
3.Design, construct, and maintain temporary structures conformin g to AASHTO LRFD Bridge Construction Specifications, Article 3.5. Design rail and posts according to the WisDOT Bridge Manual, chapter 30.
526.3.3 Temporary Structures
2.Inspect temporary structures c onforming to the National Bridge Inspection Standards and the department’s structure inspection manual before opening to traf fic. Perform additional inspections, as the department’s structure inspection manual requires, based on structure type and time in service. Submit inspection reports on department form DT2007 to the engineer and electronic copies to the department's bureau of structure s maintenance section. Ensure t hat a department-certified active team leader, listed online in the department's highway structur es information system, performs the inspections.
3.Maintain temporary structures and approaches in place until no longer needed. Unless the engineer directs otherwise, completely re move and dispose of as specifie d in 203.3.4 . Contractor-furnished materials remain the contract or's property upon removal.
526.4 Measurement
1.The department will measure the Te mporary Structure bid items as a single lump sum for each structure accept ably completed.
526.5 Payment
1.The department will pay for measured quantities at the contrac t unit price under the following bid items: ITEM NUMBER DESCRIPTION UNIT 526.0100 Temporary Structure (station) LS
2.Payment for the Temporary Structure bid items is full compensa tion for providing a temporary structure including design and construction; for backfilling with structure backfill; for maintaining; and for removing when no longer needed. Effective with the December 2018 Letting 312 2019 Standard Spec ifications Section 527 Structural Plate Pipe and Pipe Arches
527.1 Description
1.This section describes providing structural plate pipe, or str uctural plate pipe arches.
527.2 Materials
1.Furnish structural plate pipe o r structural plate pipe arches fabricated from zinc coated corrugated steel or aluminum alloy structur al plates unless the contract s pecifies otherwise.
2.Furnish erection bolts and zinc coated corrugated steel plate conforming to AASHTO M167.
3.Furnish erection bolts and aluminum alloy structural plate con forming to AASHTO M219, except do not use aluminum bolts and nuts.
4.Furnish plates of the thicknes s the plans show or the contract specifies.
5.Furnish pipe arches, for a desi gnated span width, conforming t o the span and rise dimensions, and the radii of curvatures the contract designates.
6.Unless the contract specify otherwise, furnish structural plat e pipe and pipe arches with square ends.
7.Repair damaged spelter coating according to AASHTO M167.
527.3 Construction
527.3.1 Fabrication
527.3.1 1 Description of Plates
1.Plates shall consist of zinc c oated corrugated steel or alumin um alloy structural units. Use the manufacturer’s standard plate wi dth and length for the size structure specified, and stagger the joints either circumferentially or longi tudinally. Measure plate width circumferentially, or parallel to the highway centerline. Plates sha ll include an approximately 2-inc h lip beyond each end crest, resulting in the given structure’s actual length being approximately 4 inche s longer than the nominal length, except if skewed or beveled. Connect the plates at longitudinal and circumferential seams by bolts.
2.Provide the radius of curvature the plans show.
527.3.1 2 Forming and Punching Plates
1.Curve each plate to the proper radius and punch the bolt holes so all plates curved to the same radius, except end plates, are interchangeable during erection.
2.Place bolt holes along those plate edges that form longitudina l seams in rows 2 inches apart, with one row in the valley and one in t he crest of the corrugations. Sta gger the bolt holes between crest and valley for steel plates.
3.Space the bolt holes along thos e plate edges that form the cir cumferential seams in the finished structure approximately 10 inches.
4.Place the center of the hole no closer to the plate edge than 1 3/4 times the diameter of the bolt.
5.Punch the bolt holes in steel pl ates 3/16 inch to 9/32 inch in thickness, inclusive, before zinc coating the plates.
6.If the completed structure is a circular pipe, curve the plate s so that if bolted together they form true circles of the required diameters.
7.Cut plates for forming skewed or sloped ends to produce the angle of skew or slope specified. Keep burned edges free from oxide and burrs. Place legible identification numerals on eac h plate part to designate its proper position in the finished structure. 527.3.2 Erection
1.If erecting a pipe or pipe arch structure in a trench, make the trench a sufficient w idth to allow thorough backfill compaction.
2.Bed the pipe or pipe arch in an earth foundation of uniform de nsity, carefully shaped by a template supported at the spec ified grade to fit the lower plates of the structure. If rock, in either ledge or boulder form is encountered, remove it below grade and replace with foundation backfill conforming to
520.2 to provide compacted bedding of a thickness of not less than 1 /2 inch for every foot of fill above
the structure, with a minimum a llowable thickness of 8 inches. If there is no stab le foundation at the grade established, remove and r eplace unstable soil under the s tructure and for a width of at least one diameter on each side of the structure with foundation backfill , and compact to provide adequate support for the structure, unless the plans or special provisio ns specify other special construction methods.
3.Provide the camber the plans show or the engineer specifies in the foundation bed for a pipe or pipe arch.
Referenced in this section
Sections that cite this one
Temporary Structures in other states
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Source: Wisconsin Standard Specifications for Highway and Structure Construction, 2019 Edition. Pages 320–320 of 601. View official source ↗