VOLUME 2 TECHNICAL SPECIFICATIONS BID NO PROJECT MANUAL FOR BONDS RANCH ROAD WIDENING PROJECT BIDS DUE JULY 9, :00 P.M.

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1 Vendor Name: JACK BEACHAM, C.P.M., A.P.P. PURCHASING AGENT TARRANT COUNTY PURCHASING DEPARTMENT ROB COX, C.P.M., A.P.P. ASSISTANT PURCHASING AGENT VOLUME 2 TECHNICAL SPECIFICATIONS BID NO PROJECT MANUAL FOR BONDS RANCH ROAD WIDENING PROJECT BIDS DUE JULY 9, :00 P.M. Technical Specifications Prepared by Frank W. Neal & Associates, Inc W. Broadway Fort Worth, TX BID NO

2 TABLE OF CONTENTS INTRODUCTION... 1 GENERAL NOTES... 2 SECTIONS EXTRACTED FROM TxDOT STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MAINTENANCE OF HIGHWAYS, STREETS, AND BRIDGES ITEM 461 STRUCTURAL PLATE STRUCTURES ITEM 466 HEADWALLS AND WINGWALLS

3 BONDS RANCH ROAD WIDENING PROJECT Includes the furnishing of all materials, except materials specified to be furnished by the County, equipment and labor for the installation of pavement and drainage structures and all necessary appurtenances and incidental work to provide a complete and serviceable project designated as: BONDS RANCH ROAD WIDENING PROJECT Pursuant to the foregoing 'Notice to Bidders', the undersigned Bidder, having thoroughly examined the Contract Documents, including plans, special contract documents, and Texas Department of Transportation Standard Specifications for Construction and Maintenance of Highways, Streets and Bridges, 2014 Edition, the site of the project and understanding the amount of work to be done, and the prevailing conditions, hereby proposes to do all the work, furnish all labor, equipment and material except as specified to be furnished by the County, which is necessary to fully complete the work as provided in the Plans and Contract Documents and subject to the inspection and approval of the Tarrant County Engineer; and binds himself upon acceptance of this Proposal to execute a contract and furnish an approved Performance Bond and Payment Bond, if any, as may be required by the Contract Documents for the performing and completing of the said work. Contractor proposes to do the work within the time stated and for the stated sums: The governing technical specifications for construction will be the 2014 Standard Specifications for Construction and Maintenance of Highways, Streets and Bridges, prepared by the Texas Department of Transportation (TxDOT). Volume 2_Technical Specifications PAGE 1 OF BID NO

4 BONDS RANCH ROAD WIDENING PROJECT I. GENERAL NOTES A. Any Lab Testing will be completed by and paid for by Tarrant County. B. The removal of any obstructions in existing drainage way due to the contractor s operations will be done at the Contractor s expense. C. Working days will be computed and charged in accordance with Item Calendar Days as indicated in the 2014 TxDOT Standard Specifications for Construction and Maintenance of Highways, Streets, and Bridges. D. Blasting of any kind or character is strictly prohibited. E. Tarrant County will excavate and prepare bedding for structural plate structure in accordance with plans. Contractor will be responsible for excavation of bedding and/or ground for installation of required footings and wingwalls. F. Contractor will be responsible for control of water in the creek during construction. This will be considered subsidiary and paid under the lump sum item. G. The contractor will provide any traffic control necessary to complete the work. Traffic Control will be in accordance with the TxMUTCD and will be considered subsidiary and paid under the lump sum bid item. H. Tarrant County will backfill structural plate structure, headwalls and wingwalls upon completion by the contractor. I. Measurement and Payment from the standard specifications is void and project will be bid as lump sum for all labor, equipment and materials to complete the work. Item 110. Excavation (This item is considered subsidiary to Item 466) If waste material from this project is placed in a base floodplain as defined by FEMA, a permit will have to be obtained from the local community responsible for enforcing National Flood Insurance Program (NFIP) regulations. The Contractor is responsible for ensuring that the owner of the property receiving the waste has obtained the necessary permit. Volume 2_Technical Specifications PAGE 2 OF BID NO

5 BONDS RANCH ROAD WIDENING PROJECT The following pages have been extracted from Texas Department of Transportation Standard Specifications for Construction and Maintenance of Highways, Streets, and Bridges Adopted by the Texas Department of Transportation November 1, 2014

6 Item 461 Structural Plate Structures 1. DESCRIPTION 2. MATERIALS Furnish and install structural plate pipes, pipe arches, arches, underpasses, box culverts, and special shapes General. Furnish materials in accordance with the following. Item 420, Concrete Substructures Item 421, Hydraulic Cement Concrete Item 440, Reinforcement for Concrete Item 442, Metal for Structures, Item 445, Galvanizing, Item 447, Structural Bolting Provide galvanized steel plates conforming to AASHTO M 167. Provide aluminum plates conforming to AASHTO M 219. Use Class C concrete for footings unless otherwise shown on the plans. Fabrication. Use structural units of corrugated galvanized metal for steel plates. Furnish single plates in standard sizes to permit structure length increments of 2 ft. Provide plates with an approximate 2-in. lip beyond each end crest. Design and construct footings for arches to accommodate this additional length. Fabricate galvanized steel inverts, toe walls, footings, and closure plates when required in accordance with the requirements for the galvanized steel structural plate structure. Use structural units of corrugated aluminum alloy for aluminum plates. Furnish cut plates on structure ends to permit structure length increments of 1 ft. for aluminum alloy structures. Provide plates with an approximate 2-in. lip beyond each end crest. Design and construct footings for arches to accommodate this additional length. Fabricate aluminum alloy inverts, toe walls, footings, and closure plates in accordance with the requirements for the aluminum structural plate structure when required. Form plates to provide bolted lap joints. Punch bolt holes so all plates with like dimensions, curvature, and number of bolts per foot of seam will be interchangeable. Curve each plate to the proper radius to provide cross-sectional dimensions of the finished structure as shown on the plans. Stagger joints so no more than 3 plates are joined at any one point. Provide bolt holes along the edges of the plates, unless otherwise specified, that will form longitudinal seams in the finished structure as follows: Stagger holes in rows 2 in. apart, with one row in the valley and one on the crest of the corrugations and at least 4 bolts per foot for galvanized steel structures. Provide holes in rows 1-3/4 in. apart with 2 bolts in each valley and on each crest and at least 16 bolts per 3 feet for aluminum alloy structures. Provide bolt holes at a maximum spacing of 12 in. along the edges of the plates that will form circumferential seams in the finished structure. Ensure a minimum distance from center of hole to edge of plate of at least 1-3/4 times the diameter of the bolt. Provide bolt holes in the longitudinal seams with a hole diameter that does not exceed the diameter of the bolt by more than 1/8 in. Finish burned edges so they are galvanized and free from oxide and burrs and present a satisfactory appearance. Place legible identification marks on each plate to designate its proper position in the finish structure. TxDOT 461

7 Furnish an itemized statement of the number and size of plates in each shipment and furnish erection drawings showing the position of the plates in the structure. Furnish copies of mill test reports for the base metal. Provide samples of the plates in accordance with Tex-708-I, when directed. Provide metal headwalls that comply with the details shown on the plans Design. The gauge or minimum thickness and permissible corrugations of metal plates to be furnished for each structure will be shown on the plans. 3. CONSTRUCTION 3.1. Designation of Type. The type of structure will be indicated on the plans by the following descriptions: Structure type: structural plate pipe, structural plate pipe arch, structural plate arch, structural plate underpass, or structural plate box culvert. Type of material: galvanized steel or aluminum. Structure size: diameter or horizontal and vertical dimensions. When the type of material is not specified: either galvanized steel or aluminum Foundations. Construct substructure for structural plate arches as shown on the plans. Form and finish footings to established true lines and grades. Set anchors or box culvert slots to true line and grade when placing concrete for each substructure unit. Place substructure units in accordance with Item 420, Concret Substructures, 440, Reinforcementand Item for Concrete Place footings entirely on hard materials such as rock or shale or on firm soil or compacted soil cushion. Undercut and replace rock with a minimum 12 in. thick compacted soil cushion when only a portion of the founding area is rock. Remove the soil when a thin layer is partially covering rock within the bearing area and place the footings directly on rock in accordance with details shown on the plans Erection. Coat any steel in joints not protected by galvanizing with suitable asphalt paint. Handle pipes and plates carefully to avoid damage to any protective coating. Provide hot-dip galvanized anchor bolts with a minimum 3/4-in. diameter and 6-in. length spaced at maximum 19-in. centers for anchoring plates to headwalls or other concrete end treatment. Place plates for arch structures after the substructure has cured a minimum of 3 days. Insert all bolts not already in place when all plates are in position, and tighten all nuts progressively and uniformly, beginning at one end of the structure. Tighten all nuts a second time to a torque between 150 and 300 ft. lb. for steel bolts and between 100 and 150 ft. lb. for aluminum bolts. Check at least 20% of the bolts with a torque wrench when using an impact wrench. Replace all service bolts used in drawing the plates together with standard bolts. The tolerance for span and rise during erection is 2% of design measurements or 5 in., whichever is less Workmanship. Repair minor damage to galvanized coating in accordance with Section , Repa All other structural plates on which the galvanized coating has been damaged or that show defective workmanship will be rejected. This requirement applies not only to the individual plates but also to the shipment as a whole. The presence of any of the following defects will be cause for rejection: uneven laps; elliptical shape (unless specified); variation from a straight line; ragged edges; loose bolts; uneven bolt lines or spacing; illegible brand; bruised, scaled, or broken galvanized coating; or dents or bends in the metal TxDOT 461

8 3.5. Excavation and Backfill. Excavate and backfill or construct the embankment around and over the structural plate structure in accordance with Item 400, Excavation and Backfill for this Section. Furnish acceptable devices for monitoring the horizontal and vertical shape of the structure. The tolerance for span and rise during backfilling operations is 2% of design measurements or 5 in., whichever is less. For arches (except pipe arches), if the headwalls are built after backfilling the arch, place the first material midway between the ends of the arch, forming as narrow a ramp as possible until the top of the arch is reached. Construct the ramp evenly from both sides, and thoroughly compact the backfill as it is placed. Deposit the remainder of the backfill from the top of the arch both ways from the center to the ends and as evenly as possible on both sides of the arch after constructing the 2 ramps to the top of the arch. If the headwalls are built before backfilling the arch, place the fill material first adjacent to one headwall until the top of the arch has been reached and then from the top of the arch toward the other headwall. Deposit the material evenly on both sides of the arch. Perform the same backfill phases for all structures more or less simultaneously. Do not drop backfill from such a height or concentrate it in such an amount before distribution over the top arch that it will damage the flexible structure. Compact this backfill with hand-operated tamps or other acceptable equipment. Use only hand-operated, mechanical tamping equipment within vertical planes 2 ft. beyond the horizontal limits of the structure until a minimum of 2 ft. of cover has been compacted over the structure. Ensure all large construction equipment is kept a minimum of 3 ft. from the center of the span to prevent local deformations of the plates due to concentrated loads. Do not use heavy earth-moving equipment over the structure until a minimum of 4 ft. of permanent or temporary compacted fill has been placed over the structure unless otherwise shown on the plans or permitted in writing. Check with the structure manufacturer before crossing the structure with any construction equipment with a 75,000 lb. or greater single-axle load. Additional cover beyond 4 ft. may be required to accommodate these vehicles. Remove and replace damaged plates or structures at no expense to the Department. Inspect the inside periphery of the structure for local or unequal deformation caused by improper construction methods before adding each new layer of loose backfill material. Continue inspections until a minimum of 24 in. of cover is obtained. Evidence of such deformation will be reason for corrective measures as directed. 4. MEASUREMENT 5. PAYMENT Structural plate pipes, pipe arches, arches, underpasses, and box culverts will be measured by the foot. Measurement will be made between the ends of the barrel along the flow line, not including safety end treatments. Safety end treatments will be measured in accordance with Item 467, Safety End Treatment. For multiple structures, the measured length will be the sum of the lengths of the barrels. This is a plans quantity measurement Item. The quantity to be paid is the quantity shown in the proposal unless modified by Article 9.2., Plans Quantity. Measurement. Additional measurements or calculations will be made if adjustments of quantities are required. The work performed and materials furnished in accordance with this Item and measured as provided under Measurement will be paid for at the bid price for Structural Plate Pipes, Structural Plate Pipe Arches, Structural Plate Underpasses, and Structural Plate Box Culverts of the size, gauge or minimum thickness, and material specified. This price is full compensation for furnishing, transporting, and erecting the structural plate structures; bolts, nuts, washers, anchor bolts, and anchor channels or angles; aluminum alloy inverts, toe walls, footings, closure plates, and stiffeners; and equipment, labor, tools, and incidentals. Inverts, toe walls, footings, closure plates, elbows, skewed sections, and stiffeners will not be paid for directly but are subsidiary to this item. TxDOT 461 Protection methods for excavations greater than 5 ft. in depth will be measured and paid for as required under Item 402, Trench Excavation Protection, or Item 403, Temporary Special Shoring. Excavation, shaping, bedding, and backfill will be paid for in accordance with Item 400, Excavation and Backfill for Structures.

9 Item 466 Headwalls and Wingwalls 1. DESCRIPTION 2. MATERIALS Furnish, construct, and install concrete headwalls and wingwalls for drainage structures and underpasses General. Furnish materials in accordance with the following. Item 420, Concrete Substructures Item 421, Hydraulic Cement Concrete Item 440, Reinforcement for Concrete 2.2. Fabrication. Use Class C concrete for cast-in-place and precast concrete units unless otherwise shown on the plans. Furnish cast-in-place or precast headwalls and wingwalls unless otherwise shown on the plans General. Fabricate cast-in-place concrete units and precast units in accordance with Item 420 Concrete Substructures. Use the following definitions for he Headwalls refers to all-barrelwalls,andmultiple-barrelincludingpipe wi culvert structures. Wingwalls refers - barreltoor multipleall-barrelwallsboxculvert structuresatthe. ends o Lifting Holes. Provide no more than 4 lifting holes in each section for precast units. Lifting holes may be cast, cut into fresh concrete after form removal, or drilled. Provide lifting holes large enough for adequate lifting devices based on the size and weight of the section. The maximum hole diameter is 3 in. at the inside surface of the wall and 4 in. at the outside surface. Cut no more than 1 longitudinal wire or 2 circumferential wires per layer of reinforcing steel when locating lift holes. Repair spalled areas around lifting holes Marking. Clearly mark each precast unit before shipment from the casting or fabrication yard with the following: the date of manufacture, the name or trademark of the manufacturer, and the type and size designation Storage and Shipment. Store precast units on a level surface. Do not place any loads on precast concrete units until design strength is reached. Do not ship units until design strength requirements have been met Causes for Rejection. Precast units may be rejected for not meeting any one of the specification requirements. Individual units may also be rejected for fractures or cracks passing through the wall or surface defects indicating honeycombed or open texture surfaces. Remove rejected units from the project, and replace them with acceptable units meeting the requirements of this Item Defects and Repairs. Occasional imperfections in manufacture or accidental damage sustained during handling may be repaired. The repaired units will be acceptable if they conform to the requirements of this Item and the repairs are sound, properly finished, and cured in conformance with pertinent specifications. TxDOT 466

10 3. CONSTRUCTION 3.1. General. Remove portions of existing structures and drill, dowel, and grout in accordance with Item 420, Concrete Substructures Excavation, Shaping, Bedding, and Backfill. Excavate, shape, bed, and backfill in accordance with Item 400, Excavation and Backfill for Structures Take special precautions in placing and compacting the. backfill to avoid any movement or damage to the units. Bed precast units on foundations of firm and stable material accurately shaped to conform to the bases of the units Placement of Precast Units. Provide adequate means to lift and place the precast units. Fill lifting holes with mortar or concrete and cure. Precast concrete or mortar plugs may be used Connections. Make connections to new or existing structures in accordance with the details shown on the plans. Furnish jointing material in accordance with Item 464, Reinforced Concrete Pipe, or as shown on the plans. Remove a length of the existing pipe from the headwall to the joint when removing existing headwalls as shown on the plans or as approved. Re-lay the removed pipe if approved, or furnish and lay a length of new pipe. 4. MEASUREMENT This is a plans quantity measurement item. The quantity to be paid is the quantity shown in the proposal unless modified by Article 9.2., Plans Quantity Measurement Additional measurements or calculations will be made if adjustments of quantities are required Headwalls. Headwalls will be measured by each end of a structure Wingwalls. Wingwalls will be measured by one of the following methods: Square Foot. Wingwalls will be measured by the square foot of the front surface area of the wall of each type. The area will be measured from the top of the footing or apron to the top of the wall unless otherwise shown on the plans. If there is no footing or apron, then measurement is from the bottom of the wall Each. Wingwalls will be measured by each end of a structure. 5. PAYMENT The work performed and materials furnished in accordance with this Item and measured as provided under Measurement will be paid for at the price bid for Headwalls of the type and pipe size (diameter or design) specified, Wingwalls of the type specified when measurement is by the square foot, or Wingwalls type and wall height specified when measurement is by each. For payment purposes, the wingwall height will be rounded to the nearest foot. All wingwalls and headwalls of the same type will be paid for equally when skew does not affect the type. This price is full compensation for constructing, furnishing, transporting, and installing the headwalls or wingwalls; connecting to existing structure; breaking back, removing and disposing of portions of the existing structure, and replacing portions of the existing structure as required to make connections; excavation and backfill; and concrete, reinforcing steel, corrugated metal pipe or reinforced concrete pipe, equipment, labor, tools, and incidentals. Apron concrete or riprap between or around the wingwalls of single- or multiple-barrel box culvert structures will be measured and paid for in accordance with Item 432, Riprap. The removal and re-laying of existing pipe or the furnishing of new pipe to replace existing pipe will not be paid for directly but will be considered subsidiary to this Item. TxDOT 466