225DO005_West_Corridor_technical_specifications_-_Bridge_Maintenance_Services.pdf

Light Rail Bridge Maintenance 00 01 10 - 1 September 2019 Concrete Deck Sealing – Phase 2 Table of Contents Issued For Construction

General Requirements

SECTION 00 01 10

TABLE OF CONTENTS

SECTION DESCRIPTION

00 01 10 Table of Contents

DIVISION 01 GENERAL REQUIREMENTS

01 11 00 Summary of Work 01 12 10 LRT Bridge Access

DIVISION 03 CONCRETE

03 01 30 Concrete Bridge Deck Preparation

DIVISION 07 THERMAL AND MOISTURE PROTECTION

07 19 16 Bridge Deck Silane Sealer

END OF SECTION 00 01 10

Light Rail Bridge Maintenance 01 11 00 - 1 May 2025 Summary of Work Issued For Construction

Technical Specifications

SECTION 01 11 00

SUMMARY OF WORK

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. General provisions of the Contract, including General and Supplementary Conditions and other project specifcations, apply to this Section;

B. CDOT Standard Specifications for Road and Bridge Construction, current edition;

C. Project documents

D. Bridge Maintenance Scope of Work

1.2 SUMMARY

A. Section includes:

Part 1 – General

1.1 Related Documents

1.2 Summary

1.3 Project Information

1.4 Work Requirements

1.5 Passenger Access and Protection Requirements

1.6 Applicable Standards

1.7 Work Site Access and Security

1.8 Work restrictions

1.9 Photographic Documentation

1.10 Communications with Engineer

Part 2 – Products (Not used)

Part 3 – Execution

3.1 Disposal of Removed Materials

3.2 Site Cleanup

Part 4 - Measurement and Payment

Light Rail Bridge Maintenance 01 11 00 - 2 May 2025

1.3 PROJECT INFORMATION

A. Project Identification: Light Rail Bridge Maintenance

B. Project Location:

The work shall be performed at the following RTD Light Rail bridge on the West Corridor:

1. LRT bridge over Colfax Ave.

2. LRT Indiana Flyover at 6th Ave. Freeway

3. LRT bridge over 6th Ave. bridge (a.k.a Union bridge)

4. LRT bridge over Wadsworth Blvd.

5. LRT Consolidated mainline (CML) bridge

C. Owner: RTD

D. Key Owner Staff:

1. Contracting Officer: Amelia Thompson

2. Project Engineer: Svetlana Grechka/Jeffrey Freeland

3. Construction Manager: TBD

1.4 WORK REQUIREMENTS

A. The Contractor shall provide all necessary labor, materials, equipment, supervision, quality control, and insurance as necessary to complete the work shown in the contract drawings, in accordance with the referenced specifications and all other goverening regulations.

B. The Contractor shall obtain all applicable permits as required by State and City agencies.

C. All Work required for the project shall be in accordance with the Colorado Department of Transportation (CDOT) Standard Specifications for Road and Bridge Construction.

D. Work for the LRT over Wadsworth bridge includes:

1. Sweep bridge deck including passenger platform and depressed trackway.

2. Protect in place all elements and surfaces, other than the concrete deck surface that is to be sealed, from the effects of abrasive blasting and deck sealer overspray. These elements include but are not limited to:

a. Canopy structure

b. Stairways and associated railing

c. Elevators and elevator enclosures

d. Highblock loading platforms and railing

e. Utilities

Light Rail Bridge Maintenance 01 11 00 - 3 May 2025

f. Windscreens

g. Tactile surfaces

Materials for protecting these items shall be of sufficient weight, coverage, and fastening as to not be displaced by abrasion blasting operations or by wind that would not otherwise interfere with the work.

Damage of these elements, including paint finish or other surface damage, shall be repaired to the satisfaction of RTD at the Contractor’s expense.

3. Prepare all horizontal and vertical concrete surfaces inside of fence curbs vertical face for concrete sealer application using dustless abrasion blasting.

4. Apply bridge deck sealer on all accessible concrete surfaces inside fence curbs.

This work shall be completed within 72 hours of abrasive blasting surface preparation. Any locations of prepared deck surface that have become fouled by passenger activity or other causes shall be high pressure water cleaned and dried prior to sealer application.

1.5 PASSENGER ACCESS AND PROTECTION REQUIREMENTS

A. The Contractor shall maintain RTD passenger access to trains at the Wadsworth Station during the full time trains are running during the Contractor’s work shift.

Passenger access shall include:

1. Platform train access for the full length of the bridge at the track that is to remain in operation during part of the Contractor’s work shift. This accessway shall generally be one-half the platform width, except where reduced at stairways and elevators.

2. Elevator access shall be maintained at both elevators except during the time period from 1:15 AM to 3:30 AM. The accessway at the platform in front of the elevator doors shall be a minimum of 6-feet measured along the direction of the bridge from the elevator door.

3. Stairway access shall be maintained to the extent practical during the Contractor’s work shift. The accessway at the platform at the top of the stairway shall be a minimum of 6-feet measured along the direction of the bridge from the top of the stair.

4. At times when stairway access is obstructed to accommodate the work, the Contractor shall provide appropriate signage directing RTD patrons to use the elevators.

5. While passenger volume is expected to be light during the Contractor’s work shift, in the event that passenger traffic is noticeably impeded by stairway closure and elevator congestion, the Contractor shall adjust work zone barriers to allow passenger use of the affected stairway or stairways.

6. In the event of elevator mechanical failure the adjacent stairway must remain in service.

Light Rail Bridge Maintenance 01 11 00 - 4 May 2025

B. Passenger accessways at stairways and elevators shall be separated from the work zone by ADA compliant pedestrian barricade.

C. Passengers shall be protected from the effects of deck surface abrasion blasting by the use of dustless abrasion blasting methods, or as needed, by the use of a physical barrier of sufficient dimensions to prevent abrasion blasting media from drifting into passenger areas.

1.6 APPLICABLE STANDARDS

A. The Contractor shall conduct work according to all federal, state and local regulations (EPA; OSHA; CDOT; governing local agencies).

B. The Contractor shall comply with RTD safety and environmental policies; The RTD Construction Manager will have the authority to stop Contractor work (at the Contractor’s expense) if the work is deemed to be in violation of regulatory requirements, RTD’s policies, or presents a safety hazard.

C. The terms and conditions of this Contract.

1.7 WORK SITE ACCESS AND SECURITY

A. General: Contractor shall have limited access to the project site as defined elsewhere in the project specifications.

B. Contractor shall obtain all necessary permits, including the RTD Light Rail Right-of- Way (ROS) Access Permit, to prior to accessing the site and commencing with the work.

C. Use of Site: Limit use of Project site to areas required to perform the work. Do not disturb portions of project site beyond areas necessary to the work operations.

Staging and storage areas are generally not available, and the work will require planning around these limitations.

D. Contractor is responsible for obtaining all necessary permits to complete the Work.

1.8 WORK RESTRICTIONS

A. Work Restrictions, General: Comply with restrictions on construction operations.

B. Existing Utility Interruptions: No utility interruptions are anticipated as associated with the work for this project.

C. Protect all existing utilities in place. Notify the Construction Manager immediately if conflicts exist between the Work and existing utilities.

1.9 PHOTOGRAPHIC DOCUMENTATION

A. Contractor is to photograph the work area prior to start of work, during work activities and after work milestones are completed. Photos shall also be taken of any damage or unforeseen conditions during the work period. Photos shall be performed in accordance with Section 01 32 33 - Photographic Documentation, and submitted to the Owner for record purposes.

Light Rail Bridge Maintenance 01 11 00 - 5 May 2025

1.10 COMMUNICATIONS WITH ENGINEER

A. Contractor is to document any communications with the RTD Engineer whenever required by the Contract Documents and when communications will impact cost, schedule or safety. Documentation will typically be handled using the “Request for Information” component of RTD’s Submittal Tracking System. Engineer will respond to Contractor’s request within 14 days of receipt of request, if time allows. Changes in the field during construction shall be documented by both the Engineer and the Contractor.

PART 2 - PRODUCTS (NOT USED)

PART 3 - EXECUTION

3.1 DISPOSAL OF REMOVED MATERIALS

A. Contractor is responsible for the removal and disposal of any materials removed from the work site.

B. See also Section 01 74 00 – Cleaning and Waste Management (will be provide with the Work Order).

END OF SECTION

Light Rail Bridge Maintenance 01 11 00 - 6 May 2025

INTENTIONALLY LEFT BLANK

Light Rail Bridge Maintenance 01 12 00 - 1 May 2025 Bridge Access Issued For Construction

Technical Specifications

SECTION 01 12 10

BRIDGE ACCESS

PART 1 - GENERAL

1.1 SUMMARY

A. This section includes requirements for access to the RTD Light Rail bridge over East Colfax Avenue for contracted bridge maintenance work.

PART 2 - PRODUCTS (NOT USED)

PART 3 - EXECUTION

3.1 SAFETY TRAINING REQUIREMENTS

A. All workers working along the LRT tracks are required to complete the On Track Safety Training (OTST) provided by RTD at no cost. Class registration may be arranged by contacting Mathew Cross at Mathew.Cross@rtd-denver.com or 303- 299-3823.

3.2 ACCESS PERMIT REQUIREMENTS

A. Light Rail Right-of-Way (ROW) Access Permit shall be required for all work on this project. The permit shall be obtained in accordance with RTD Section 01 14 13.

When the access permit is approved, it will be valid from Sunday at 12:00 a.m. to the next Saturday at 11:59 p.m.

B. A mandatory Light Rail Right-of-Way (ROW) Access Permit meeting for work in or around the RTD track way is held every Wednesday at 2:00 p.m., at 1350 Rio Court, Denver, CO. 80204. If the Contractors’ representative is not present at the meeting, the permit will not be granted for the following week.

C. The Contractor shall provide RTD with weekly and daily notification of scheduled working hours by contacting Brian Farris by the preferred method of e-mail (Brian.Farris@RTD-denver.com) or by phone (303-253-4732). The Light Rail Control number 303-299-3480 is to be used if the Contractor is unable to reach Brian Farris at the above number.

D. The Contractor must also apply for and obtain an RTD Building and Grounds Access Permit prior to work at the Colfax bridge. In order to receive an access permit to work at the bridge, a completed electronic access permit must be emailed to bgap@rtd-denver.com at least 5 business days before work is scheduled to begin.

A copy of the permit is available at http://www.rtd-denver.com/documents/rtd-building-grounds-permit-form.pdf.

mailto:Mathew.Cross@rtd-denver.com Brian.Farris@RTD-denver.com bgap@rtd-denver.com%20 http://www.rtd-denver.com/documents/rtd-building-grounds-permit-form.pdf.

http://www.rtd-denver.com/documents/rtd-building-grounds-permit-form.pdf.

Light Rail Bridge Maintenance 01 12 00 - 2 May 2025

3.3 TEMPORARY ACCESS RESTRICTIONS

A. Access may not be allowed due to RTD train restrictions, extreme weather (heavy snow, icy conditions), and emergency situations as required by RTD. RTD will inform the contractor when daily notifications are provided to RTD if work would not be allowed due to weather conditions. The LRT flaggers will alert the work crews when they need to exit the work zone in case of emergency.

3.4 ACCESS SCHEDULE FOR WORK ON STRUCTURES

A. Contractor access within the Light Rail Corridor shall be limited to Sunday through Thursday nights, starting at approximately 2a.m. and ending at approxiamately 5a.m.

if the LRT power line system is required to be deenergized. If the LRT power line system is not required to be deenergized, then the work hours will be between 1.30am and 5.30 am. No access is allowed on Friday and Saturday nights.

B. When working on the bridge during the time period noted in paragraph A of this section, the Contractor shall install temporary orange fence at the start of the shift to designate safe work areas as approved by RTD. The fence shall be a 36"-40" in height orange construction fence secured to supports between the two tracks. The fence must not interfere with train movement on the opposite (live) track. Placement will be verified by flaggers before work begins. Temporary fence shall be removed before 4:15 A.M.

3.5 RTD FLAGGERS

A. RTD will schedule flaggers for each night’s work based upon the weekly access request. Flaggers will be onsite before 9:25 P.M. to have a meeting with all personnel that will be on the track for that night’s work, and will be in contact with all workers throughout the night and alert them when it is time to begin clearing the track.

B. The Contractor may have multiple crews working simultaneously along the closed track during the time the opposite track remains live.

C. Limitations on allowed work zone length along a bridge may be dependent by flagger sight distance and location of crossing tracks which need to remain in operation during the work. These limitations will be provided to the Contractor during the weekly permit request meetings

D. RTD will not charge the Contractor for RTD flaggers. However, if the flaggers are requested and not utilized a charge could be applied.

3.6 CONTRACTOR ENTRY TO CORRIDOR

As shown in the drawing set.

3.7 HIGHRAIL VEHICLES AND EQUIPMENT

If used, equipment used along LRT tracks must be of a size that can access the track via 12 foot access gates and not be more than 8 feet in width.

Light Rail Bridge Maintenance 01 12 00 - 3 May 2025

3.8 LRT POWER LINES SAFETY

A. LRT power lines must be de-energized before any work may be performed within 10 feet of the overhead power line.

B. The Contractor shall contact Brian Farris with all requests to power down Light Rail Power lines. This request is to be discussed at weekly access request meetings and with each night’s notification of work.

C. `De-energizing and re-energizing the line each takes 15 minutes, thereby reducing the available work hours.

PART 4 - MEASUREMENT AND PAYMENT

The Work in this Section shall not be measured or paid for separately, but shall be considered incidental to the Work.

Light Rail Bridge Maintenance 01 12 00 - 4 May 2025

INTENTIONALLY LEFT BLANK

Light Rail Bridge Maintenance 03 01 30 - 1 May 2025 Concrete Deck Sealing Concrete Bridge Deck Preparation Issued for Construction

Technical Specifications

SECTION 03 01 30

CONCRETE BRIDGE DECK PREPARATION

PART 1 - GENERAL

1.1 SUMMARY

A. This section includes requirements for bridge deck preparation for concrete surface sealing.

B. Work for this section includes:

1. Sweep bridge deck.

PART 2 - PRODUCTS (NOT USED)

PART 3 - EXECUTION

A. Bridge Deck Cleaning

1. All loose debris shall be collected by sweeping, shoveling, vacuuming and other suitable methods.

2. Equipment for collecting trash and other debris from bridge decks shall be determined by the Contractor, subject to the approval of the RTD Construction Manager, and will normally consist of, but not be limited to, industrial vacuums, brushes, brooms, and shovels. Leaf blowers and similar equipment are not acceptable.

3. The contractor shall not cause or allow trash and/or debris from the bridge to be deposited into a wetland, stream, other water body, bridge drainage system, or into active traffic lanes during the cleaning of the bridge.

B. Deck Drains

1. The Contractor shall prevent debris from entering deck drain systems during deck and joint cleaning.

C. Disposal of Waste Materials

1. Waste materials from deck preparation activities shall be removed from RTD property and shall be disposed of in accordance with local regulations, codes and ordinances.

2. All waste materials from deck preparation activities shall be removed from the bridge deck prior to abrasion blasting.

Light Rail Bridge Maintenance 03 01 30 - 2 May 2025 Concrete Deck Sealing Concrete Bridge Deck Preparation Issued for Construction

PART 4 - MEASUREMENT AND PAYMENT

4.1 METHOD OF MEASUREMENT

A. Bridge Deck Sweeping shall be measured by the square yard of deck area between fence curbs as measured in plan view. Quantities will be those shown in the bid list unless it is determined that there are discrepancies on the bid list in an amount plus or minus 2 percent of the quantity shown for an individual bridge.

4.2 BASIS OF PAYMENT

The accepted quantities will be paid for that the contract unit price per unit of measurement for each of the pay items listed below that appear in the bid schedule.

Payment will be made under:

Pay Item Pay Unit

Bridge Deck Sweeping Square Yard

Payment will be full compensation for all work necessary to complete the designated pay item.

Light Rail Bridge Maintenance 07 19 16 - 1 May 2025 Concrete Deck Sealing Bridge Deck Silane Sealer Issued for Construction

Technical Specifications

SECTION 07 19 16

BRIDGE DECK SILANE SEALER

PART 1 - GENERAL

1.1 SUMMARY

A. This section includes requirements for sealing Light Rail bridge decks using silane sealer. Bridge deck concrete surfaces to seal include all horizontal and vertical surfaces inside of fence curbs including fence curb vertical faces, walkways, deck, plinths supporting railroad track, and pedestals supporting poles for overhead electric lines.

B. Work for this section includes:

1. Surface preparation by dustless abrasion blasting.

2. Silane sealer application.

1.2 RELATED SECTIONS

A. Section 01 33 00 Submittal Procedures

B. Section 01 35 26 Government Safety Requirements

C. Section 01 35 43 Environmental Procedures

D. Section 01 66 00 Product Storage and Handling Requirements

E. Section 03 01 30 Concrete Deck Preparation

1.3 QUALIFICATIONS

A. Manufacturer qualifications: Manufacturer shall be a company specializing in manufacturing the products specified in this section with minimum five years’ documented experience. Manufacturer shall be ISO 9001 certified.

B. Contractor qualifications: Contractor shall be qualified in the field of concrete surface preparation and coating with a successful track record of 5 years or more. Contractor shall maintain qualified personnel who have received product training by a manufacturer's representative.

1.4 DELIVERY, STORAGE, AND HANDLING

A. All materials must be delivered in original, unopened containers with the Manufacturer’s name, labels, product identification, and batch numbers. Damaged material must be removed from the site immediately.

B. Store all materials off the ground and protect from rain, freezing or excessive heat until ready for use.

C. Store and handle all products in accordance with Manufacturer recommendations.

Light Rail Bridge Maintenance 07 19 16 - 2 May 2025

D. Container Marking and Shipping Certifications: Each container shall be clearly marked with the manufacturer's batch number. Each shipment shall be accompanied by a certification that the coating materials are from the batches indicated on the containers and comply with the requirements of these specifications.

1.5 REFERENCES

A. International Concrete Repair Institute, Guideline No. 03732

1.6 SUBMITTALS

A. The Contractor shall provide five references showing previous successful experience with the specified or comparable surface preparation and coating system.

References shall include the name, address, and telephone number for the owner of each installation for which the Contractor provided the service.

B. Product Data: Provide product data sheets and material safety data sheets (MSDS) for each coating material, solvent, cleaning agent or other hazardous material to be used.

C. Manufacturer’s Quality Assurance: Submit manufacturer’s certification that sealer complies with specified requirements and is suitable for intended application.

D. Warranty: Submit manufacturer’s standard warranty.

E. Plans and Procedures:

1. Safety and health procedures shall be submitted.

2. Disposal methods for solvents and cleaning materials used at the project site shall be submitted.

3. Plan for protection of surrounding areas and non-work surfaces shall be submitted.

F. Submit supplier’s shipping certifications for all materials used for the project.

G. Submit manufacturer’s target application rate as determined in Section 3 of this specification.

H. Submit record of provided application rate as described in Section 4.2 of this specification.

PART 2 - PRODUCTS

2.1 SILANE SEALER

A. Silane sealer shall be a vapor permeable penetrating sealer and water repellant suitable for application on vertical and horizontal surfaces.

B. Sealer shall have the following properties and characteristics:

Light Rail Bridge Maintenance 07 19 16 - 3 May 2025

1. Water based emulsion cream type sealer to provide loss-free, single-step application.

2. Provides clearly visible distinction of treated and untreated areas.

3. Capable of application by airless spray, brush, or roller.

4. Silane content shall be 80% minimum.

5. Penetration depth shall be not less than 10 mm at established application rate.

C. Subject to compliance with the above requirements, acceptable products include but are not limited to the following:

1. Sikagard 706 Thixo, manufactured by Sika Corporation

2. S-Tech Concreme, manufactured by Dry-Treat Pty Ltd

Other products shall be subject to review and approval by RTD.

PART 3 - TEST SAMPLE – NOT USED

PART 4 - EXECUTION

4.1 SURFACE PREPARATION

A. Concrete surfaces to be sealed shall be prepared by dustless abrasion blasting, and shall include all horizontal and vertical surfaces between the fence curbs, including:

deck; walkway; plinths; overhead power pole pedestals, and highblock loading platform concrete ramp.

B. Abrasion blasting shall be conducted in such a manner as not to damage or remove existing protective coatings on metal elements including components of the track, electrical systems, and fence.

C. Abrasion blasting shall be performed within 72 hours of application of concrete sealer.

D. Extent of abrasion blasting shall be sufficient to remove all visual evidence of residue, laitance and other surface contaminants.

E. Resulting concrete surface profile shall correspond to CSP 2 or CSP 3 in accordance with ICRI Concrete Repair Manual standards.

4.2 APPLICATION

A. Manufacturer’s representative shall provide contractor with assistance at the job site to establish target application rates for representative concrete surface conditions.

Manufacturer’s representative shall provide the Contractor and RTD Construction Manager with written instructions for the field determined application rates and any related application requirements.

Light Rail Bridge Maintenance 07 19 16 - 4 May 2025

B. Contractor shall prepare the quantity of sealant required for a given area based on the established target application rate. Applicator shall control application rate as needed to comply with target rate to the extent practical. Contractor shall submit to RTD a record of the bridge limits covered per each 55-gallon container of sealant used.

C. Apply sealer in accordance with manufacturer’s instructions. Adhere to all limitations and cautions for the product as stated in the manufacturer’s printed literature.

D. Do not apply sealer during inclement weather or if rain, snow, or high winds exceeding 30 mph are expected within four hours.

4.3 CLEANING

A. Leave finished work and work area in a neat, clean condition each work shift.

PART 5 - MEASUREMENT AND PAYMENT

5.1 METHOD OF MEASUREMENT

A. Bridge Deck Surface Preparation will be measured by the square foot. Quantities will be those shown in the bid list unless it is determined that there are discrepancies in the bid list in an amount plus or minus 2 percent of the quantity shown for an individual bridge.

B. Bridge Deck Silane Sealer will be measured by the square foot. Quantities will be those shown in the bid list unless it is determined that there are discrepancies in the bid list in an amount plus or minus 2 percent of the quantity shown for an individual bridge.

5.2 BASIS OF PAYMENT

The accepted quantities will be paid for that the contract unit price per unit of measurement for each of the pay items listed below that appear in the bid schedule.

Payment will be made under:

Pay Item Pay Unit

Bridge Deck Surface Preparation Square Foot

Bridge Deck Silane Sealer Square Foot

Payment will be full compensation for all work necessary to complete the designated pay item.