00013812_Att B_Special Provisions_RevAdd2.xlsx.docx

Attachment B – Special Provisions

These Special Provisions identify and modify certain sections of the Standard Specifications which are incorporated into this ITB and resulting Contract in ITB section C.2.6. The Standard Specifications are available online at:

https://www.oregon.gov/odot/Business/Specs/2024_STANDARD_SPECIFICATIONS.pdf

All number references in the special provisions shall be understood to refer to the sections and subsections of the Standard Specifications bearing like numbers.

TABLE OF CONTENTS FOR SPECIAL PROVISIONS

PROFESSIONAL OF RECORD CERTIFICATION:

06/30/2026

I certify the Special Provision Section listed below are applicable to the design for the subject project for Mobilization and Environmental Protection. Modified Special Provisions were prepared by me or under my supervision.

Section 00210, 00290

FINAL ELECTRONIC DOCUMENT AVAILABLE UPON REQUEST

I certify the Special Provision Section(s) listed below are applicable to the design for the subject project for Temporary Traffic Control. Modified Special Provisions were prepared by me or under my supervision.

Section(s) 00220, 00221, 00222, 00223

FINAL ELECTRONIC DOCUMENT AVAILABLE UPON REQUEST

I certify the Special Provision Section(s) listed below are applicable to the design for the subject project for the Bridge related work. Modified Special Provisions were prepared by me or under my supervision.

Section(s) 00253, 00255, 00501, 00530, 00535, 00540, 00542, 00582, 02050, 02510

FINAL ELECTRONIC DOCUMENT AVAILABLE UPON REQUEST

SPECIAL PROVISIONS

SECTION 00210 - MOBILIZATION

Comply with Section 00210 of the Standard Specifications.

SECTION 00220 - ACCOMMODATIONS FOR PUBLIC TRAFFIC

Comply with Section 00220 of the Standard Specifications modified as follows:

00220.40(e)(1) Closed Lanes - Replace this subsection, except for the subsection number and title, with the following:

Traffic Lanes may be closed on the Oregon Coast Highway US101 when allowed, shown, or directed during the following periods of time except as specified in 00220.40(e)(2):

Single Lane Closures – One Traffic Lane on the Oregon Coast Hwy US101 may be closed during the following times:

Daily, Monday through Thursday, between 5:00 a.m. and 4:00p.m.

Friday between 5:00 a.m. and 12:00 p.m.

Nightly, Sunday night through Friday morning, between 6:00 p.m. and 7:00 a.m.

00220.40(e)(2)(b) Special Events - Add the following to the end of this subsection:

The following special events will occur during this Project:

Independence Day – July 4 International Kite Festival – August 18 to August 24 Friday before Labor Day – August 29 Labor Day – September 1 Rod Run/Car – September 5 to September 7 Great Columbia Crossing – October 12

Add the following subsection:

00220.41 Bridge Work - Before starting any grading or Pavement removal at Bridge ends or removal of Pavement from Bridge decks, arrange so that all Equipment, labor, and Materials required to complete the Pavement replacement Work and Bridge deck waterproofing Work are on hand or are guaranteed to be delivered. Once grading and Pavement removal begins, vigorously prosecute and complete this Work. Complete paving and membrane waterproofing Work in the shortest possible time.

Temporarily taper or bevel longitudinal and transverse grade changes or drop‑offs resulting from grading and Pavement removal and membrane waterproofing Work with asphalt concrete mixture to provide a smooth and safe transition. Construct tapers according to 00620.40.

Add the following subsection:

00220.45 Load Restrictions on Bridges -

For Structure(s) No.07949B, limit the combined weight of Equipment, vehicles, and supplies placed in a closed Traffic Lane or Shoulder on the Bridge according to 00253.46.

SECTION 00221 - COMMON PROVISIONS FOR WORK ZONE TRAFFIC CONTROL

Comply with Section 00221 of the Standard Specifications modified as follows:

00221.06 Traffic Control Plan ‑ Replace this subsection with the following subsection:

00221.06 Traffic Control Plan and Tourist-Oriented Directional and Business Logo Signs –

(a) Traffic Control Plan - Submit one of the following, 5 Calendar Days before the preconstruction conference:

(1) Agency Traffic Control Plan ‑ If the Contractor intends to use the Agency TCP without modification, a written notification indicating that the Agency TCP will be used without modification.

(2) Contractor-Modified Traffic Control Plan ‑ The Contractor may request to use a Contractor-modified Agency TCP, or a TCP developed by the Contractor. Do not use a modified TCP, or a TCP developed by the Contractor, unless approved by the Engineer. Use the Agency TCP unless a modified TCP, or a TCP developed by the Contractor is accepted.

The Engineer is not obligated to consider any modified Agency TCP or a TCP developed by the Contractor. The Agency will not be liable to the Contractor for failure to accept or act upon any request for a modified Agency TCP or a TCP developed by the Contractor.

To conserve time and funds, the Contractor may first submit a written request for a preliminary review by the Engineer. The request should contain a description of the proposal together with a rough estimate of anticipated dollar and time impacts. The Engineer will, within a reasonable time, respond to the Contractor in writing whether or not the request would be considered by the Agency.

If requesting a Contractor-modified Agency TCP, or a TCP developed by the Contractor, at a minimum the request shall meet all requirements of the Contract documents and comply with the Project transportation management plan (TMP). Provide the following information:

Stamped Working Drawings according to 00150.35 that include the proposed TCP showing all TCM and quantities of TCD.

A TPAR plan that includes:

Details and features used to provide pedestrian accessibility.

Pedestrian staging Plans at a scale no smaller than 1 inch = 50 feet.

Temporary alternate facilities or detour routes for pedestrian traffic.

Staging sequences and details for Work affecting vehicular, pedestrian, and bicycle traffic.

Proposed order and duration of the TCM.

A detailed temporary striping plan.

If the Contractor’s request to use a Contractor-modified Agency TCP, or a TCP developed by the Contractor is approved in whole or in part, acceptance will be made by a Change Order.

The Engineer will establish prices that represent a fair measure of the value of Work to be added, changed, or deleted as a result of any accepted modifications to the Agency TCP or an accepted TCP developed by the Contractor.

Once a TCP has been accepted by the Engineer, any additional modifications must be submitted by the Contractor for Agency review following the procedure described above. The Engineer is not obligated to consider additional modifications to a previously approved TCP.

(b) Tourist-Oriented Directional and Business Logo Signs ‑ Submit one of the following for approval, at least 5 Calendar Days before the preconstruction conference:

(1) No Signs ‑ If there are no tourist-oriented directional (TOD) or business logo signs on the Project, a written notification that no TOD or business logo signs exist within the Project limits or

(2) Signs ‑ Submit one copy of a sketch map of the Project showing all existing TOD and business logo signs and a written narrative describing how these signs will be kept in service and protected throughout all the construction stages. If modifications are necessary, submit updated information to the Engineer for approval at least 21 Calendar Days before the change is needed.

00221.90(b) Temporary Protection and Direction of Traffic – Replace the bullet that begins “Providing, Surfacing, maintain…” with the following bullet:

Providing, surfacing, maintaining, removing, and restoring the TPAR.

SECTION 00222 – TEMPORARY TRAFFIC CONTROL SIGNS

Comply with Section 00222 of the Standard Specifications modified as follows:

00222.40(e) Temporary Sign Placement ‑ Add the following to the end of the bullet list:

Install "ROAD WORK AHEAD" (W20‑1‑48) signs with a 36 by 24-inch "FINES DOUBLE" (R2‑6aP) rider on the Oregon Coast Highway, according to the "TCD Spacing Table" shown on the Standard Drawings or as modified by the Plans except do not install the "FINES DOUBLE" rider on concrete barrier mounted signs.

Install beyond each end of the Project, facing outgoing traffic, an "END ROAD WORK" (CG20‑2A‑24) sign a distance of (A ÷ 2) according to the "TCD Spacing Table" shown on the Standard Drawings or as modified by the Plans.

SECTION 00223 - WORK ZONE TRAFFIC CONTROL LABOR AND VEHICLES

Comply with Section 00223 of the Standard Specifications.

SECTION 00253 - TEMPORARY WORK ACCESS AND CONTAINMENT

Comply with Section 00253 of the Standard Specifications modified as follows:

00253.00 Scope - Add the following paragraph to the end of this subsection:

On Structure No. 07949B, provide temporary work access and containment systems for bearing replacement work at bents 56, 68, 80, and 84.

Add the following subsection:

00253.09 Work Platform, Scaffolding and Containment Structural Design Requirements -

Design work platforms, scaffolding, and containment Structures for dead load, live load, and wind load. Obtain basic wind speed as shown on Standard Drawing TM671 and applied in the most critical direction. For Structures with fundamental frequency less than 1 Hz, design for wind loads accounting for structural dynamic effects.

Provide designs with a factor of safety of at least six for wire ropes and connecting hardware and at least four for all other components for containment Structure and work platform components.

Verify structural adequacy of the Bridge with added loading from containment Structures and work platforms using AASHTO Standard Specifications for Highway Bridges, Group II, III, V, and VI load combinations.

(a) Containment Structures Positioned Symmetrically on any Span ‑ For containment structures positioned symmetrically on any span, design calculations for the bridge structural members are not required if all of the following conditions are satisfied:

Total combined live load and dead load of all work platforms and containment Structures supported by the span, including all personnel, Equipment, Materials, and collected debris or water, does not exceed 25 pounds per square foot.

Point loads do not exceed 2750 pounds at each point and point loads are spaced at least 8.5 feet in both horizontal directions. Point loads are applied to deck within one foot of a girder, cross beam, or diaphragm, or directly to a girder, cross beam or diaphragm.

(b) Containment Structures Positioned Asymmetrically on any Span ‑ For containment structures positioned asymmetrically on any span, design calculations for the bridge structural members are not required if all of the following conditions are satisfied:

Total combined live load and dead load of all work platforms and containment Structures supported by the span, including all personnel, Equipment, Materials, and collected debris or water, does not exceed 25 pounds per square foot.

Point loads do not exceed 2750 pounds at each point and point loads are spaced at least 8.5 feet in both horizontal directions. Point loads are applied to deck within one foot of a girder, cross beam, or diaphragm.

(c) High Wind Events ‑ If removal of containment walls is used to comply with projected area limits at high wind speed, removal is required when actual wind speed or predicted wind speed exceeds allowable limits. 24-hour weather watch is required during non-work times. Predicted wind speeds are obtained from:

forecast.weather.gov/MapClick.php?lat= 46.215796&lon=-123.862144 &unit=0&lg=english&FcstType=graphical

Actual wind speeds are measured using a handheld wind speed measuring instrument with certified accuracy 3% of reading.

00253.40 General ‑ Add the following paragraph to the end of this subsection:

Containment and work platforms do not extend more than 1 foot below bottom of bent cap of the existing Structure.

00253.44 Marine Traffic Restrictions -

Bridge No. 07949B may not be closed to marine traffic.

Add the following subsection:

00253.46 Loads Placed on Structure Roadway, Shoulders, and Sidewalks ‑ When a Traffic Lane, Shoulder or sidewalk is closed the following loading may be applied to the Structure in addition to the loading identified in 00253.09:

When a Traffic Lane or Shoulder closures are allowed on Structure No.07949B:

Equipment, vehicles, and Materials may be placed in the closed:

Traffic Lane Shoulder Sidewalk Equipment, vehicles, and Materials may NOT be placed in or on:

Active Traffic Lane No more than one vehicle operating under D.O.T. overload permit will be allowed within the closed area on each span of the Structure.

Bending moment and maximum shear produced by one lane of OR-STP-5BW on each span of the Structure;

SECTION 00255 - TEMPORARY BRIDGE JACKING

Section 00255, which is not a Standard Specification, is included in this Project by Special Provision.

Description

00255.00 Scope - This Work consists of temporarily raising and shoring the existing Spans located at bents 56, 68, 80, and 84, with jacking system for the purpose of bearing replacement. Once the Work is completed, the span will be lowered back into place and the jacking system removed.

The term “jacking system” includes jacking equipment, temporary support seat, falsework jacking bent or temporary corbel.

00255.02 Plans - Plans for the existing Structure are available from the Engineer. Prints of these plans are available upon request.

00255.03 Submittals - Submit a stamped and detailed Bridge jacking work plan according to 00150.35, to the Engineer for review four weeks prior to Bridge jacking work. Design the work plan according to with the current AASHTO LRFD Bridge Design Specifications and jacking load diagram shown on the Plans. Design the temporary support to carry all Structure dead loads, live loads if allowed and construction loads.

Include the following information in the submittal:

The proposed method of the jacking, and shoring.

Descriptions of equipment to be used Descriptions and values of all loads, including construction equipment loads Justification for allowable bearing stresses used to support the falsework bent.

Complete details and calculations for jacking and supporting the existing Structure

This review does not relieve the Contractor of the responsibility for the safety of the method or Equipment. Do not perform Work until the work plan has been approved by the Engineer and all comments are adequately addressed.

00255.04 Methods and Monitoring System - The Bridge jacking work plan includes, but is not limited to, the following:

Detailed time schedule of the planned operations.

Details to temporarily strengthen the existing Bridge members. Provide temporary supports to bear directly on girder stems or bent caps or bear on support sills which are structurally adequate to transmit the load to the stems or cap without overstressing any member of the new or existing Structure. Design temporary supports not to induce permanent forces into the completed Structure or produce cracking.

Contingency plans to address potential malfunctions or interruptions in the work plan.

Details to ensure stability of the Bridge while the Bridge is being raised, during the removal of the existing bearings, installation of the new bearing and lowering of the Bridge.

Details of how secondary supports, such as blocking and cribbing, will be installed after the Bridge has been raised.

Lateral stability of the Bridge and jacking system.

Equipment that ensures uniform lifting of the Bridge.

Provide a redundant system of supports during the entire jacking operation for backup should any of the jacks fail. Include stacks of steel plates added as necessary to maintain the redundant supports at each jack location within 1/4 inch of the jacking sill or corbels.

Descriptions of the displacement monitoring system. Include in the displacement monitoring system, but not limited to:

Equipment to be used, Location of control points, Method and schedule of taking measurements, Provisions to jack the Structure if settlement occur in the temporary supports during construction.

Construction

00255.50 Jacking Operations:

(a) General - Control and monitor the jacking operations to ensure that the jacking loads are applied simultaneously to prevent distortion and excessive stresses that would damage the Structure. Jack the Superstructure as necessary to maintain the total vertical displacements at control points to less than 1/4 inch from the elevations recorded prior to jacking or as modified by the Engineer.

Remove attachments from the existing Structure and concrete surfaces to restore to original conditions, except where permanent alterations are shown on the plans.

(b) Unanticipated Displacements - If, during construction, unanticipated displacements, cracking or other damage occur, do the following:

Discontinue the construction until corrective measures satisfactory to the Engineer are performed.

Repair damage to the structure as a result of the Contractor's operations.

Measurement

00255.80 Measurement - No measurement of quantities will be made for Work performed under this Section.

Payment

00255.90 Payment - The accepted quantities of Work performed under this Section will be paid for at the Contract lump sum amount for the item “Bridge Jacking at Bent _____”.

The Bent number will be inserted in the blank.

Payment will be payment in full for furnishing the Bridge jacking work plan, furnishing and placing all Materials, and for furnishing all Equipment, labor, and Incidentals necessary to complete the Work as specified.

No separate or additional payment will be made for designing, constructing, maintaining, inspecting, or removing the temporary Bridge jacking.

SECTION 00290 - ENVIRONMENTAL PROTECTION

Comply with Section 00290 of the Standard Specifications modified as follows:

00290.30(a)(7) Water Quality:

Do not discharge water contaminated by pollutants including sediment, drilling fluids and waste, concrete, grout, or water contained within a work area isolation, into any waters of the State or U.S. or conveyances draining thereto until it has been treated using Materials such as those listed in 00280.15 or 00280.16 or by pumping to a vegetated upland location. Do not allow Project discharges to increase the concentration of any pollutant in the receiving water to a level that exceeds the limits prescribed by OAR 340‑041.

Do not use permanent stormwater quality treatment facilities to treat construction runoff unless prescribed by an ESCP approved under Section 00280.

If construction discharge water is released using an outfall or diffuser port, do not exceed velocities more than 4 feet per second, and do not exceed an aperture size of 1 inch.

Implement containment measures adequate to prevent pollutants from entering waters of the State or U.S. Such pollutants include but are not limited to construction and demolition materials, waste spoils, fuel or petroleum products, detergents, silt, welding slag and grindings, concrete sawcutting by-products and sandblasting abrasives.

Do not allow curing concrete or grout to be submerged within waters of the State or U.S. less than 24 hours after placement, except within work area isolation. Do not end-dump riprap into the waters of the State or U.S. Place riprap from above the ordinary high water line.

Monitor weather and streamflow forecasts and conditions to anticipate high flows that may unintentionally inundate any portion of the Project Site.

If high flow conditions occur or are anticipated to occur that may unintentionally inundate any portion of the Project Site, remove all potentially affected Equipment, Materials, and debris from the potential inundation area. Cease Work in the area until water recedes and the risk of further high water events passes. The Engineer retains the authority to temporarily halt or modify the Work in case of excessive turbidity or damage to natural resources.

If Work in or around waters of the State or U.S. violate permit conditions or any requirement of this subsection, stop such Work and notify the Engineer.

00290.34(a) Regulated Work Areas - Add the following to the end of this subsection:

The regulated work area is the area at or below the Highest Measured Tide (HMT) elevation shown on the plans.

The total volume of material filled or discharged into waters of the State and waters of the U.S. shall not exceed 0 cubic yards.

The total volume of material excavated from the waters of the State and waters of the U.S. shall not exceed 0 cubic yards.

00290.36(a) Migratory Birds ‑ Add the following to the end of this subsection:

Do not disturb migratory bird nesting habitat (shrubs, trees, and structures), or clear vegetation from March 1 to September 1 of each year without prior written approval from the Engineer. Notify the Engineer, in writing, a minimum of 10 Calendar Days prior to starting activities that could harm nesting birds.

(1) Bird Management - Bird management activities to comply with the Migratory Bird Treaty Act (16 U.S.C. 703 712) will be performed by the Agency. Ensure that the Agency and its permitted agents have access to the project area, as needed to prevent migratory bird nesting. Nesting prevention may include daily bird harassment and the installation and maintenance of devices that exclude birds.

Do not disturb migratory bird nesting habitats (shrubs, trees, and structures), or clear vegetation from March 1 to September 1 of each calendar year without prior written approval from the Engineer. Notify the Engineer, in writing, a minimum of 10 Calendar Days prior to starting activities that could harm nesting birds.

Add the following subsection:

00290.42 Work Containment Plan - A Work Containment Plan (WCP) is required on this Project for all activities.

Develop and submit a WCP for approval at least 28 Calendar Days prior to mobilization for all activities. Maintain a copy of the WCP on the Project Site at all times during construction, readily available to employees and inspectors. Ensure that all employees comply with the provisions of the WCP. Design the WCP to avoid or minimize disturbance to protected features (sensitive cultural or natural resources, regulated work areas, aquatic life or habitat in regulated work areas) related to Contractor operations.

Before developing the WCP, meet with Agency to review the Contractor’s activities that require the WCP to ensure that all parties understand the locations of protected features to be avoided and the measures needed to avoid and protect them.

Notify the Engineer at least 10 Calendar Days before beginning work access or containment construction activities.

The Agency reserves the right to stop Work and require the Contractor to change the WCP methods and Equipment before any additional Contract Work, at no additional cost to the Agency, if and when, in the opinion of the Agency, such methods jeopardize sensitive cultural or natural resources, regulated work areas, or aquatic life or habitat in regulated work areas.

The WCP shall identify how the Contractor's construction operations will protect regulated features during mobilization, construction, maintenance, and demolition. Include a narrative describing compliance with Section 00290 as related to construction, operation, and demolition activities specified in Section 00253.

Design, construct, maintain, and remove temporary work access and containment systems according to Section 00253.

00290.90 Payment - Add the following paragraph(s) to the end of this subsection:

The work containment plan will be paid for at the Contract lump sum amount for the item "Work Containment Plan".

Payment will be payment in full for furnishing all Materials, Equipment, labor, and Incidentals necessary to complete the Work as specified. Payment includes providing and updating the Work Containment Plan.

SECTION 00501 - BRIDGE REMOVAL

Comply with Section 00501 of the Standard Specifications modified as follows:

00501.00 Scope - Add the following paragraph(s) to the end of this subsection:

Remove portions of the existing bridge over The Columbia River as shown.

Add the following subsection:

00501.02 Plans - Plans of the existing Structure are available from the Engineer. Prints of these plans are available upon request.

Add the following subsection:

00501.03 Submittals - Submit unstamped bridge removal plans according to 00150.35 21 Calendar Days before beginning removal work.

Include the following information in the submittal:

Removal sequence, including contractor staging and traffic staging.

Detailed schedule of bridge removal work.

Type of equipment that will be used, including size and capacity.

Equipment location during removal operations.

Do not begin bridge removal work until the bridge removal plans have been approved.

SECTION 00530 - STEEL REINFORCEMENT FOR CONCRETE

Comply with Section 00530 of the Standard Specifications modified as follows:

00530.10 Materials ‑ Replace this subsection, except for the subsection number and title, with the following:

00530.41(a) Fabric ‑ Replace this subsection with the following subsection:

00530.41(a) Welded Wire Reinforcement ‑ If welded wire reinforcement is shipped in rolls, straighten it into flat sheets before placing.

00530.41(b) Ties and Supports – Replace the bullet that begins “When stainless steel rebar is specified…” with the following bullet:

When stainless steel reinforcing is specified, use stainless steel ties and supports meeting the requirements of 02513.60.

Delete the bullet that begins “Tie stainless steel reinforcement …”.

Delete the bullet that begins “Support stainless steel reinforcement…”.

Replace the bullet that begins "Do not allow direct contact between stainless …" with the following bullet:

Do not allow stainless steel reinforcement to directly contact ASTM A1035 CS reinforcement. Do not allow stainless steel reinforcement or ASTM A1035 CS reinforcement in direct contact with other reinforcement with a different type of metal. When stainless steel or ASTM A1035 CS reinforcing or dowels are located near other reinforcing with a different type of metal, use nylon or polyethylene spacers to maintain a minimum 1 inch clearance between the two metals and bind them with nylon cable ties. Where insufficient space exists to maintain this minimum, either bar may be sleeved with a continuous polyethylene or nylon tube extending at least 1 inch in each direction past the point of closest contact between the two dissimilar bars.

Add the following bullets to the end of the bullet list:

When ASTM A1035 CS reinforcing is specified, use epoxy coated ties and supports meeting the requirements of 02510.60(a).

00530.43 Splicing Welded Wire Fabric – Replace this subsection with the following subsection:

00530.43 Splicing Welded Wire Reinforcement ‑ Overlap sheets of welded wire reinforcement as shown or provide edge and end laps not less than one mesh in width. Securely fasten sheets at the ends and edges according to 00530.41.

00530.80(a) Lump Sum - Add the following to the end of this subsection:

The estimated quantity of reinforcement is:

Structure Number Uncoated Reinforcement Quantity (Pound)

Grade 60

00530.90 Payment ‑ Replace this subsection, except for the subsection number and title, with the following:

The accepted quantities of reinforcement will be paid for at the Contract unit price, per unit of measurement, for the following items:

Pay Item Unit of Measurement

In items (a), (c), (e), and (f) the grade of reinforcement will be inserted in the blank.

In items (b) and (d) the ASTM chromium content, CS, CM, or CL will be inserted in the blank.

Item (a) and (b) include fabricating and placing uncoated reinforcement as specified.

Item (c) and (d) include placing epoxy coated reinforcement as specified.

Item (e) includes fabricating and placing stainless steel reinforcement as specified.

Item (f) includes fabricating and placing welded wire reinforcement as specified.

Payment for reinforcement will be made when the reinforcement is incorporated into the concrete.

Payment will be payment in full for furnishing and placing all Materials, and for furnishing all Equipment, labor, and Incidentals necessary to complete the Work as specified.

No separate or additional payment will be made for clips, wire, separators, wire chairs, or other Material used in fastening the reinforcement in place.

SECTION 00535 ‑ POST-INSTALLED ANCHOR SYSTEMS

Comply with Section 00535 of the Standard Specifications modified as follows:

Add the following subsection:

00535.45(c) Anchor Test Summary - Test the installed anchors according to Table 00535‑2 and Section 00165.

Table 00535-2

Str.

Sheet

Test (yes/no) Prod.

Test (yes/no)

System (Mech/Resin) Type (bolt/ rebar) Size

Grade

Sustained Tension (yes/no)

Replace anchors that fail at no additional cost to the Agency.

SECTION 00540 - STRUCTURAL CONCRETE

00540.80(a)(1) Lump Sum - Add the following to the end of this subsection:

The estimated quantity of concrete is:

Bridge No. 07949B

Type and Class Quantity (Cu. Yd.)

General Structural Concrete, Class 3300 5.0

FALSEWORK DESIGN CHECKLIST

Instructions - This checklist was developed to facilitate the design, review, and erection of falsework to be used for Oregon Department of Transportation bridge construction projects. This checklist is intended to act as a reminder to design or check for specific important aspects of this construction. It is not a substitute for plan and/or design criteria or specification requirements.

The Checklist is to be completed and signed by the Falsework Design Engineer. Answer every question. Attach to the Checklist an explanation of any negative responses.

Submit the Checklist according to 00540.41(a).

A.

Contract Plans, Specifications, Permits, Etc.

SECTION 00542 - CONCRETE REPAIR

Section 00542, which is not in the Standard Specifications, is included in this Project by Special Provision.

Description

00542.00 Scope ‑ This Work consists of locating and repairing damage concrete and reinforcement in Structures, and providing mortar or resin buildup over shallow reinforcement.

00542.01 Definitions:

Anode ‑ A galvanic unit consisting of a sacrificial zinc core and a cementitious mortar outer cover for corrosion prevention and on‑going corrosion control of surrounding reinforcing steel.

Damaged Concrete ‑ Concrete that is spalled or delaminated due to corroded reinforcement or metal appurtenances such as bearing devices, drains, and conduits; concrete that is debonded from corroded reinforcing bars; concrete with near-surface rock pockets; unsound or delaminated existing patches; and concrete that has been drilled, excavated, or removed during prior maintenance work or during the Work of this Contract.

Hand Patch ‑ Installing hand-troweled repair mortar in concrete cavities up to 0.50 square foot surface area.

Pumped Repair ‑ Installing Pumped Repair mortar in concrete cavities greater than 0.50 square foot surface area.

Saturated Surface Dry Condition ‑ Surface condition where hardened concrete is thoroughly saturated with water, but any free water has been removed from the surface.

Shallow Rebar ‑ Steel reinforcement with 1/2 inch or less of concrete cover.

00542.02 Submittals ‑ Submit the following at least 21 Calendar Days before beginning concrete repair Work according to 00150.37. Within 21 Calendar Days after receipt of submittals, the Engineer will review the submittals and designate them in writing as "approved", "approved as noted", or "returned for correction".

(a) Concrete Repair Mortar ‑ Submit before concrete repair work the following:

A description of all relevant constituents and properties of the Material. Data published by manufacturer is acceptable unless certifications of the Material characteristics are required by the Specifications.

For prepackaged products, the manufacturer’s certification that the contents include cement and Aggregate and do not include silica fume, fly ash, or any other porosity-reducing admixture. Provide the proportion (by weight) of portland cement to Sand according to the provisions of 00165.35.

The Specifications subsection with which each repair mortar complies.

If proposing alternative repair mortar to those specified in 00542.10, test data demonstrating compliance with 00542.10.

For alternate repair mortar submit three 4 by 8‑inch cylinders of repair mortar cast in the presence of the Engineer using the proposed mix proportions, admixtures, and mixing and application Equipment, at least 10 Calendar Days before starting concrete repair Work. Cast and cure the cylinders according to AASHTO T 23 or R 39.

Submit records of mix proportions and which mix design was used in each repair location. Maintain and provide records that are complete enough to be able to match repaired areas with the mix records.

(b) Concrete Repair Procedure ‑ Prior to beginning Work under this Section, submit a concrete repair procedure that includes the following:

Manufacturer’s specifications and operating instructions for all Equipment.

Details of each step to accomplish the Work.

Steps to regularly maintain quality control of all newly applied mortar.

Plan to maintain records of verification of proportion (by weight) of Sand to portland cement and quantity of any additives for all mortar mixed on-site.

Plan to maintain records identifying the mix design for each repaired area.

(c) Repair Damaged Reinforcing Bars ‑ Submit a plan for accomplishing reinforcing bar repair that includes the following:

Welder certifications according to AWS D1.4 Pre-approved welding procedure specification (WPS) or procedure qualification record / welding procedure specification (PQR/WPS) Detailed procedure for electrode control measures Detailed procedure for achieving, maintaining, and monitoring pre-heat and inter‑pass temperatures.

00542.03 Pre-welding Conference ‑ Before beginning concrete repair Work, meet with the Contractor’s supervisory personnel, concrete repair Subcontractor’s supervisory personnel, the Contractor’s certified welding inspector (CWI), and the Engineer at a mutually agreed upon time. The pre-welding conference includes discussion of the Contractor’s quality control responsibilities, documentation requirements, welding procedures and Equipment, and demonstration of welder skills.

Materials

00542.10 Patch Material:

(a) Pumped Repair Mortar ‑ Provide one of the following mortars with the required admixture as specified in 00542.15.

Pumped BASF MasterEmaco S 440MC (formerly BASF LA Repair Mortar).

Alternative repair mortar conforming to the following:

Non-polymer flowable micro-concrete Suitable for pumping At least 4,000 psi 28-Day compressive strength “Low” potential for cracking and no cracking in 28 Calendar Days when tested according to ASTM C1581, including Appendix Electrical resistivity in the range of 2,000 to 20,000 ohm-cm

Submit proposed alternative Materials for approval according to 00542.02.

(b) Hand Patch Material ‑ Provide Hand Patching Materials according to 02015.20 or 02015.30. Observe QPL remarks and follow the manufacturer’s recommendation for application.

00542.11 Non-conductive Resin ‑ Non-conductive resin is acceptable for filling cavities of 0.05 square feet or less and for resin buildup over Shallow Rebar in sound concrete. Furnish a non-conductive resin from the category “Resin Bonded Anchor System” of the QPL, mixed at a 1:1 ratio with clean abrasive blasting Material.

00542.12 Abrasive ‑ Furnish clean, dry, non-metallic grit abrasive Material with no mineral constituents that break down and remain on the surface in visible quantity. Furnish hard angular shaped abrasives from 16 - 30 mesh.

00542.13 Water ‑ Furnish water according to Section 02020.

00542.14 Reinforcement and Added Steel ‑ Furnish ASTM A706 Grade 60 uncoated reinforcing bars conforming to 02510.10. Furnish uncoated, ungalvanized welded wire fabric conforming to 02510.40. Other metal embedded in the mortar to facilitate concrete replacement shall be uncoated and ungalvanized.

00542.15 Admixtures ‑ Use only admixtures approved by the Engineer.

If using admixtures to reduce the water-cement ratio, or to retard or accelerate the development of strength, use only admixtures compatible with the mortar and at the rate specified by the manufacturer.

00542.17 Mechanical Anchors ‑ Furnish the following mechanical screw anchors or approved equal:

Dewalt Ultracon + (Hex washer head) Hilti Kwik Con II + (Hex washer head) ITW Red Head Tapcon (Hex washer head)

00542.18 Galvanic Zinc Anode ‑ Furnish one of the following galvanic zinc Anodes or approved equal:

Galvashield XP2 (100 grams zinc) Vector Corrosion Technologies 5436 N. Desert Saguaro Ct.

Tucson, AZ 85745

(520) 230-0060 Fax (813) 830-7565 www.vector-corrosion.com Sentinel Silver (100 grams zinc) The Euclid Chemical Company 19218 Redwood Rd.

Cleveland, OH 44110

(216) 531-9222 Fax (216) 531-9596 www.euclidchemical.com

MasterProtect 8105 Anode, 105 grams zinc (24 anodes/case) Master Builders Solutions/MBCC Group 889 Valley Park Drive.

Shakopee, MN 55379

(800) 433-9517 (Customer service) www.master-builders-solutions.com

Labor

00542.30 Welders ‑ Provide certified welders and welding inspectors according to AWS D1.4.

Construction

00542.40 Work Access, Containment, and Disposal ‑ Provide Work access and debris containment according to Section 00253.

Dispose of waste according to 00290.20.

00542.41 Locating and Marking ‑ Locate and mark the following:

All concrete having visible spalling or delamination due to corrosion of reinforcement or metal appurtenances such as bearing devices, drains, and conduits. Include within the repair boundaries all Damaged Concrete at the edges of spalls.

All visible unsound patches of Material.

All concrete that is visibly loose, or that becomes dislodged or loosened when struck with a 16-ounce masonry hammer or by other approved technique.

Verify the presence of steel with a metal detector.

The Contractor is advised that concrete containing Aggregate larger than 2 inches can cause false readings.