2442Removal of Existing Bridges

2442.1DESCRIPTION

This Work consists of removing and disposing of existing Bridges.

2442.2MATERIALS

Use explosives for the removal of existing Bridges in accordance with 1711, “Use of Explosives,” and as approved by the Engineer.

2442.3CONSTRUCTION REQUIREMENTS

A General The Department will not require salvage of Material during bridge removal, unless otherwise shown on the Plans or as required by the Special Provisions. Remove Material, not required for salvage for the Department, using methods that will not damage salvaged members. Place salvaged Material in stockpiles at locations as directed by the Engineer. If the Contract requires delivery of salvaged Material to a storage yard or other designated location, place salvaged Material on dunnage or sound wooden pallets. Dispose of Material not required for salvage in accordance with 2104.3C, “Removal Operations,” and 2104.3D, “Disposal of Materials and Debris.” Completely remove portions of existing Bridge to bottom of footing or to an elevation shown in the Contract. Completely remove piling and obstructions that interfere with the new Structure. Fill pits or trenches resulting from the removal operations with Material meeting 1103, “Definitions: Select Grading Material,” as approved by the Engineer. Place backfill above water level in Layers no greater than 1 foot thick. Compact each Layer in accordance with the methods in 2106.3G.2, “Quality Compaction.”

If removing a Bridge from a location not on the site of the new Structure, excavate and dispose of the embankments adjoining the abutments as directed by the Engineer and in accordance with the following:

abutment and continuing until intersecting with the natural ground surface Do not constrict the stream channel except as required by the Contract or as approved by the Engineer. If removing part of an existing concrete pavement, remove the pavement to an existing joint or cut the pavement on a straight line at right angles to the centerline of the R oad. If cutting, use a saw to cut the top surface at least 1 inch deep without damaging the pavement remaining in place. During excavation, prevent undermining or disturbing the foundation Material under pavement remaining in place. B Structural Steel Dismantle salvaged structural steel in sections, individual members, or parts as shown on the Plans or as directed by the Engineer. Unless otherwise required by the Contract, remove structural steel in the reverse sequence of the original erection. Remove structural steel without damaging any structural members. Only cut field driven rivets. Use pilot nuts to draw pins. Match mark members with valve-action opaque paint markers in accordance with a diagram provided by the Department. Similarly mark pins, pin nuts, loose plates, and ring fills to indicate proper location. Securely wire or bolt loose parts to adjacent members, or pack loose parts in properly identified boxes. Coat pins, pin-holes, and machined surfaces with a lubricant listed on the APL. Remove rivets with a pneumatic chipping tool. Do not use torches unless specifically required by the Contract. Stockpile structural steel on suitable skids. Arrange dissimilar parts in separate piles. Stack structural steel to avoid damage to the members. C Timber Remove timber and lumber with minimal breakage or splitting. Remove nails, spikes, fastenings, and hardware from timber and lumber. Clean timber of dirt and other foreign matter except paint and bituminous surfacing Material.

2442.4METHOD OF MEASUREMENT

The Engineer will measure each total Bridge removal and will not separately measure salvage Material types or salvage portions of Work for each Bridge removed.

2442.5BASIS OF PAYMENT

The Contract Unit Price for Remove existing Bridge includes the cost to remove and dispose of the Structure within the removal limits designated in the Contract. The Department will pay for the removal of existing Bridges or Material salvage on the basis of the following schedule: Item No. Item Unit

2442.501 Remove Existing Bridge lump sum

1 Salvage and Haul Material (Bridge) lump sum