BOOK 4 – Reference Information

Light Rail Modernization Program (LRMP)

CROMWELL MAINTENANCE AND STORAGE FACILITY

MODERNIZATION PROJECT

TRANCHE 3

DESIGN-BUILD (DB)

BOOK 4 – REFERENCE DOCUMENTS

(For Information Only)

CONTRACT NUMBER: T-2443-0150

Maryland Transit Administration Light Rail Modernization Program (LRMP) TRANCHE 3

T-2443-0150 Page 2 of 8 Book 4 (Reference Documents)

TABLE OF CONTENTS

Appendix A – Base Technical Concept Drawings

Appendix B – Design Calculations

Appendix C – Equipment Cut Sheets

Appendix D – MTA Roofing Policy

Appendix E – SWM Documents

Appendix F – Geotechnical Boring information

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Appendix A - Base Technical Concept Drawings

To be provided via Data Room after NDA is received.

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Appendix B – Design Calculations

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Appendix C – Equipment Cut Sheets

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Appendix D – MTA Roofing Policy

ROOFING POLICIES 070100 - 1

SECTION 070100 – ROOFING POLICIES

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.

1.2 SUMMARY

A. This section includes general requirements for new roofing construction, re-roofing construction, and roofing system guarantee requirements applicable to roofing work for Maryland Transit Administration.

B. References to national standards documents and publications including but not limited to the list provide shall form a part of this specification to the extent applicable to this project. When there is a conflict between referenced standards, applicable building codes and additional requirements outlined elsewhere in this section or contract documents, the most stringent requirement shall govern unless superseded by the Engineer of Record due to structural constraints as per the existing conditions. The references to national standards documents and publications shall be interpreted to refer to the most current edition or revision in effect at the time a design is in progress as this takes precedence.

1. Maryland Building Performance Standards

2. Chapter VII of the DGS procedure manual for professional services” dated July

2019- “Roofing Standards & Guarantee Requirements”.

3. Chapter-15 of IBC– “Roof Assemblies and Roof Top Structures”.

4. Section 705 of IEBC - “Re-roofing”.

5. Chapter-4 of IECC - “Commercial Energy Efficiency”.

6. NEC.

7. IPC

8. IMC

9. IGCC for Sustainability Compliance.

10. OSHA/MOSHA.

11. American Society for Testing Materials (ASTM)

12. American National Standards Institute (ANSI)

13. Factory Mutual System (FM)

14. Underwriters' Laboratories (UL)

15. International Building Code (IBC)

16. American Institute of Steel Construction Manual (AISC)

17. Sheet Metal and Air Conditioning Contractors National Association, Inc.

(SMACNA)

18. National Roofing Contractors Association (NRCA)

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19. National Institute of Standards and Technology (NIST)

1.3 NEW ROOFING CONSTRUCTION:

A. For new building projects, the selection of either a steep slope or low slope roofing system has been based on the results of a 60-year life cycle cost analysis as well as the maintenance and replacement intervals and costs for either roofing systems.

B. Roof on new construction shall be pitched to drains, scuppers, or gutters as applicable with the roof slope achieved structurally.

1. Low slope roof shall be required to have a minimum slope as per the applicable building code but not less than 1/2" per foot.

2. Where this slope is not feasible to achieve structurally, the slope may be achieved via tapered insulation.

C. Overflow drains or scuppers shall be provided in accordance with the applicable code requirements.

D. All materials used for roofing systems shall be HAZMAT free.

E. All new roofs shall be provided with OSHA compliant permanent roof access, roof fall protection or fall arrest system for inspection and maintenance.

F. Low slope roof system shall include, minimum ½” thick substrate board, vapor barrier, insulation and minimum ½” thick cover board where applicable for various roof types.

G. Steep slope roofs with a minimum slope of 2-1/2 inches per foot, may be finished with roofing types as appropriate to the project. All steep slope roofs must have a full width (36") of modified bitumen ice dam protection membrane installed at all eaves and valleys.

1. Standing seam metal roofing systems where used, shall be fabricated metal panel systems from nominal 22 gauge Aluminum-zinc alloy coated steel or G-90 galvanized steel. The panels shall have a UL Class 120 rating. The finish should be minimum 3-coat, 70% Kynar and shall be tested in accordance with ASTM procedures. The system shall have a minimum 20 year manufacturer's weatherproof warranty. The Kynar color finish shall also be covered by a 20 year manufacturer's warranty.

H. Energy Compliance: Insulation thermal resistance values shall be established in accordance with the applicable energy code. The insulation R-value of the roof insulation entirely above the roof deck shall comply with the applicable code requirement but not less than R-30 CI for a roof over conditioned space.

I. Sustainability: Roofing materials and color shall be selected to achieve cool roofing.

Roof systems selected for new roof surfaces shall maximize light and heat reflectance.

White roofs shall be the standard for new, low slope roofs.

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1. Roofing Materials: All roofing systems, other than vegetated roof systems, must comply with the following requirements:

a. Low-Sloped roofing less than or equal to 2:12 slope must have an SRI of at least 78.

b. Steep-Sloped roofing greater than 2:12 slope must have an SRI of at least

29.

2. Photovoltaic Panels—Building Integrated Photovoltaic (BIPV) panels should be designed as part of the building envelope system or solar shading system as a way of generating on-site, renewable energy. Where this is not feasible, the building structure shall be designed to consider support of future solar panel installations.

1.4 RE-ROOFING CONSTRUCTION:

A. FOR ROOF REPLACEMENT PROJECTS, the selection of the replacement roofing system shall be based on an evaluation of costs associated with factors affecting the proposed system, including durability, span dimension, structural condition, foundation design/capacity, and disposition or accommodation of roof top equipment, slip resistance as well as the maintenance and replacement intervals.

B. Low slope re-roofing project shall aim to achieve minimum 3/8-inch per foot slope to drain but not less than the existing roof slope. Where this slope is not feasible due to existing constraints, minimum 1/4-inch per foot slope or slope as required by applicable building code shall be provided. Drainage valleys shall have crickets such that slope directs storm water towards the low point drain or scupper.

C. Overflow drains or scuppers shall be provided in accordance with the applicable code requirements.

D. All materials used for re-roofing systems shall be HAZMAT free.

E. Low slope roof system shall include, minimum ½” thick substrate board, vapor barrier, insulation, minimum ½” thick cover board and roofing membrane.

F. Fall protection and Roof Access: Where feasible, all re-roofing shall be provided with OSHA compliant permanent roof access and fall-protection system for inspection and maintenance. This may include one or more of the following as appropriate to the project:

1. Minimum 42” high parapet.

2. Fall arrest system with anchor points or continuous lifeline cable system.

3. Existing ladders shall be equipped with fall arrest systems where required per

OSHA/MOSHA.

4. Evaluate existing roof access and provide new roof access where required.

5. Roof hatch shall be equipped with safety post and guardrail system.

G. Energy Compliance: Insulation thermal resistance values shall be established in accordance with the applicable energy code. The minimum insulation R-value of the

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roof insulation entirely above the roof deck over a conditioned space shall be minimum R-30.

H. Sustainability: Roofing materials and color shall be selected to achieve cool roofing.

Roof systems selected for new roof surfaces shall maximize light and heat reflectance.

White or light gray roofs shall be the standard for low slope re-roofs.

1. Roofing Materials: All roofing systems, other than vegetated roof systems, must comply with the following requirements:

a. Low-Sloped roofing less than or equal to 2:12 slope must have an SRI of at least 78.

b. Steep-Sloped roofing greater than 2:12 slope must have an SRI of at least

29.

1.5 Photovoltaic Panels—Building Integrated Photovoltaic (BIPV) panels may be designed as part of the building envelope system or solar shading system as a way of generating on-site, renewable energy. Evaluate the feasibility as directed by the MTA. QUALITY

ASSURANCE

A. Manufacturer Qualifications: A qualified manufacturer that is UL listed and listed in FM Approvals' RoofNav for roofing system identical to that used for this Project.

Manufacturer shall have a minimum of twenty (20) years’ experience in the production of specified roofing system and shall demonstrate past experience with examples of projects of similar type and exposure.

B. Installer Qualifications: A qualified firm that is approved, authorized, or certified by roofing system manufacturer to install manufacturer's product and that is eligible to receive manufacturer's special warranty. The installer shall be authorized by the manufacturer and the work shall be supervised by a person having a minimum of five

(5) years’ experience installing specified roofing system on similar type and size projects.

C. Source Limitations: Obtain components, including roof insulation for roofing system from same manufacturer providing the roofing system warranty or from manufacturer approved by the manufacturer providing the roofing system warranty.

D. The manufacturer’s factory approved representative shall make all inspections, at no cost to the Administration, at the required intervals and perform any other work necessary such that the specified warranty is delivered at the conclusion of the work.

1.6 CONTRACTOR’S GUARANTEE

A. THE CONTRACTOR must be a NDL certified roofing system installer for at least 5 years continuously (currently), and must provide to the Maryland Transit Administration a current letter from a roofing materials manufacturer stating roof installation work and that their workmanship, including flashings and sheet-metal work, will be fully covered by the Manufacturer’s 20 year NDL warranty, without exception.

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B. THE CONTRACTOR must also provide the MTA with a minimum 2-year workmanship guarantee.

C. Manufacturer’s periodic inspection program may be included in the specification.

1.7 MANUFACTURER’S WARRANTY:

A. Furnish the roof manufacturer's 20-year NDL (no-dollar-limit) roof system materials and installation workmanship warranty, including flashing, insulation, and accessories necessary for a watertight roof system construction. Provide warranty directly to the Maryland Transit Administration and commence warranty effective date at time of Substantial Completion of the project. The warranty must state that:

1. If within the warranty period the roof system, as installed for its intended use in the normal climatic and environmental conditions of the facility, becomes non-watertight, shows evidence of moisture intrusion within the assembly, blisters, splits, tears, delaminates, separates at the seams, or shows evidence of excessive weathering due to defective materials or installation workmanship, the repair or replacement of the defective and damaged materials of the roof system assembly and correction of defective workmanship are the responsibility of the roof manufacturer. All costs associated with the repair or replacement work are the responsibility of the roof manufacturer.

2. When the manufacturer or his approved applicator fail to perform the repairs within 72 hours of notification, emergency temporary repairs performed by others does not void the warranty.

3. Upon completion of installation, and acceptance by the MTA, the manufacturer must supply the appropriate warranty to the MTA.

4. Exception is not permitted for any damage due to wind speed less than the design wind speed or 90 mph whichever is greater.

PART 2 - PRODUCTS

NOT USED.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine substrates, areas, and conditions, with Installer present, for compliance with requirements and other conditions affecting performance of the Work.

B. Proceed with installation only after unsatisfactory conditions have been corrected.

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3.2 PREPARATION

A. Clean substrate of dust, debris, moisture, and other substances detrimental to roofing installation and prepare surface according to roofing system manufacturer's written instructions.

B. Prevent materials from entering and clogging roof drains and conductors and from spilling or migrating onto surfaces of other construction.

1. Remove roof-drain plugs when no work is taking place or when rain is forecast.

C. Preparation of Demolition Waste: Evaluate opportunities to recycle existing materials.

Prepare and maintain recyclable waste materials according to recycling or reuse facility requirements. Maintain materials free of dirt, adhesives, solvents, petroleum contamination, and other substances deleterious to the recycling process.

1. Except for items or materials to be salvaged or recycled, remove demolition waste materials from Project site and dispose of them as specified in the Specification Section “022400 Environmental Assessment”.

3.3 INSTALLATION OF ROOFING, GENERAL

A. Install roofing system as specified and according to roofing system manufacturer's written instructions, applicable recommendations per ARMA/NRCA's guidelines FM Approvals' RoofNav listed roof assembly requirements, and FM Global Property Loss Prevention Data Sheet 1-29.

3.4 FIELD QUALITY CONTROL

A. Testing Agency: Contractor shall engage a qualified testing agency to inspect substrate conditions, surface preparation, membrane application, flashings, protection, and drainage components, and to furnish reports to Engineer of Record.

B. Final Roof Inspection: Arrange for roofing system manufacturer's technical personnel to inspect roofing installation on completion, in presence of Engineer of Record, and to prepare inspection report.

1. Notify Owner 48 hours in advance of date and time of inspection.

C. Repair or remove and replace components of roofing system where inspections indicate that they do not comply with specified requirements.

D. Roofing system will be considered defective if it does not pass tests and inspections.

E. Additional testing and inspecting, at Contractor's expense, will be performed to determine if replaced or additional work complies with specified requirements.

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3.5 PROTECTING AND CLEANING

A. Protect roofing system from damage and wear during remainder of construction period.

B. Correct deficiencies in or remove roofing system that does not comply with requirements, repair substrates, and repair or reinstall roofing system to a condition free of damage and deterioration at time of Substantial Completion and according to warranty requirements.

C. Clean overspray and spillage from adjacent construction using cleaning agents and procedures recommended by manufacturer of affected construction.

END OF SECTION 070100

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Appendix E – SWM Documents

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Appendix F – Geotechnical Boring Information

2. Photovoltaic Panels—Building Integrated Photovoltaic (BIPV) panels should be designed as part of the building envelope system or solar shading system as a way of generating on-site, renewable energy. Where this is not feasible, the building structu...