DETAILED SPECS_SPSP Building C Roof Rehabilitation - James P McGrath -DNR-.pdf

SANDY POINT STATE PARK BUILDING C ROOF REHABILITATION IV-1

PROJECT NO.: EC24-09015-39

IV. DETAILED SPECIFICATIONS: REHABILITATION OF THE ROOF ON

BUILDING C, SANDY POINT STATE PARK CENTRAL STORAGE AND

DISTRIBUTION CENTER COMPOUND

1. SCOPE:

A. This project consists of providing all labor, equipment, materials, supplies, insurance, etc., necessary to apply a restoration coating over the existing metal roof on Building C in the Sandy Point State Park Central Storage and Distribution

Center; record address: 1100 E College Parkway, Annapolis, Maryland 21409.

Building C is a pre-engineered steel warehouse constructed approximately in

1997.

B. The proposed project’s scope of work shall include the following:

Demolition:

1. Remove and properly dispose of the existing lightning protection system;

abandon in place any attachment hardware that is fastened through the metal roof deck or fascia.

New Installation:

1. Remove and replace the fiberglass skylights with new corrugated steel roof panels. Panels are to match the gauge, profile and dimensions of the surrounding metal roof panels.

a. Seventeen (17) panels for approximately 510 SF (30 SF each).

2. Remove and replace the gutters and downspouts with new aluminum industrial series, 8-inch-wide box gutters and downspouts. Install with the manufacturer’s heavy duty support brackets and interior straps.

a. Approximately 247 LF of gutters.

b. Approximately 160 LF of downspouts

3. Remove and replace the flexible boot flashings around the gas flue and plumbing vent with lead flashings.

4. Apply the specified water-based rust converter to visibly corroded fasteners and hardware to remain in advance of applying the restoration coating system primers and other surface treatments.

SANDY POINT STATE PARK BUILDING C ROOF REHABILITATION IV-2

a. Approximately 1,722 fasteners

5. Cantilever Steel Beams supporting roof overhang at the west end of the building: Apply the specified water-based rust converter to visibly corroded; prime and paint with the specified exterior acrylic gloss paint.

6. Cantilever Steel Beams: Install the missing bolts, nuts, and washers at the bracket to the left of the door opening and prime and paint.

7. Prepare the existing roof deck, including abandoned-in-place hardware, in accordance with the restoration coating manufacturer’s instructions; install the specified water-based, acrylic, elastomeric roof restoration coating system over the entire corrugated metal roof deck; approximately 7,566

SF.

8. Install the specified batt insulation with stick pins and washers on the underside of the new corrugated roof panels covering the former skylight openings. Seventeen (17) openings for approximately 510 SF.

9. Survey the underside of the roof for areas where the existing insulation has come loose and is hanging. Restore the insulation in place using adhesive-backed insulation stick pins and washers.

NOTE: All quantities and dimensions listed above are approximate. It is the

Contractor’s responsibility to check / confirm the exact measurements to his / her satisfaction prior to bidding. The State shall not be held responsible for the Contractor’s failure to do this.

2. SITE VISIT:

A. All prospective bidders are encouraged to attend the Pre-bid conference meeting and familiarize themselves with the requirements for the project. Failure to attend the Pre-bid conference meeting, or visit the site, will not relieve the successful bidder from having to comply with the requirements of these specifications at no additional cost to the State.

B. The Contractor shall be responsible for ascertaining the conditions affecting the

Work, including but not limited to access and physical conditions at the site; the character of equipment at the site; and the facilities needed preliminary to and during prosecution of the work.

SANDY POINT STATE PARK BUILDING C ROOF REHABILITATION IV-3

C. The Contractor shall be responsible for ascertaining the character, quality, and quantity of surface and subsurface materials, or obstacles, to be encountered insofar, as this information is reasonably ascertainable from an inspection of the site.

D. The Contractor will need to contact Sandy Point State Park Manager, Curtis Dale, at 410-974-2149, to arrange site visits outside of the initial pre-bid conference.

3. QUALIFICATIONS OF THE CONTRACTOR:

A. The Contractor shall be licensed in the State of Maryland as a General Contractor to perform work associated with this project.

B. The Contractor shall have a minimum of five (5) years’ experience performing similar construction projects. Upon request, the Contractor shall supply a list of other similar, completed roofing projects to the DNR for review.

C. Prior to the award of this Work, the Contractor shall provide the Department of

Natural Resources (DNR) Project Manager with correspondence from the roof restoration coating system manufacturer that indicates that the Contractor / Roof

Installer holds current, advanced roofing credentials with Tremco Roofing, or the manufacturer of an approved equal product, in the type of roofing system proposed by this project specification.

1. Should the Contractor wish to bid on an alternative restoration coating system, ostensibly the equal of the basis-of-design system, he must make a formal request in writing to the DNR Project Manager a minimum of ten

(10) days prior to the deadline for submitting bids. The request must include all the documentation listed in section 1.7.C “Approval of Other

Manufacturers and Comparable Products" of supplementary specification

Section 070150.71 Rehabilitation of Metal Roofing. DNR/DGS is the final judge as to equality.

4. SCHEDULE OF WORK:

A. Work shall be scheduled through and approved by the DNR Project Manager and the Maryland State Park Manager. The Contractor shall perform all Work

Monday through Friday during the normal working hours of 8:00 am to 5:00 pm unless otherwise approved by the Park Manager in writing. No work shall be performed on state or federal holidays.

SANDY POINT STATE PARK BUILDING C ROOF REHABILITATION IV-4

B. The Contractor shall notify the DNR Project Manager seven (7) days prior to his start of work. He shall coordinate with the DNR Project Manager, and Park

Manager on the date of the Pre-construction Conference, the schedule of the

Work, and any limitations on access to the properties required.

C. Use of the premises by the Contractor is to be limited to specified work areas and approved storage areas.

D. All work shall be completed within 60 calendar days of the notice to proceed, unless a written change order extending the time is approved by the DNR Project

Manager.

5. STANDARDS AND CODES:

A. All Work shall be performed in a workmanship manner in accordance with the highest standards of the trade.

B. The Contractor shall comply with Occupational Safety and Health Administration

(OSHA) and Maryland Occupational Safety and Health Administration

(MOSHA) regulations with regard to construction safety and health standards throughout the duration of the Project.

C. All Work shall be performed in accordance with the applicable code requirements in the 2021 Maryland Building Performance Standards (MBPS) consisting of amended versions of the following ICC codes and secondary references:

• Maryland Existing Building Code (MEBC)

• Maryland Building Code (MBC)

• Maryland Life Safety Code; NFPA 101, 2018

• Maryland Energy Code (MEC)

• MPC Plumbing Code

• Maryland Mechanical Code (MMC)

• Maryland Fuel Gas Code 2018

• Maryland Electrical Code (MEC); NFPA 70, 2020

• Maryland Accessibility Code (MAC)

• National Fire Protection Association (NFPA) Codes referenced in the aforementioned Maryland codes.

6. MATERIALS AND SUPPLIES:

A. General:

1. All materials shall be as specified or approved equals.

SANDY POINT STATE PARK BUILDING C ROOF REHABILITATION IV-5

1. The Contractor shall be responsible for the coordination, off-loading and proper storage of all materials and supplies up until the time of installation and/or the final inspection.

2. The Contractor shall submit to the DNR Project

Manager all Product Technical Data Sheets, Installation Instructions, and applicable Shop Drawings for “approval” prior to ordering / shipping any materials and supplies associated with this project.

3. Where applicable, materials shall be delivered in their original unopened containers with labels intact and legible. Damaged materials and supplies will not be accepted by the State.

4. All materials and supplies shall be stored up off the ground surface and be protected from weather with weather-resistant coverings or stored in a steel storage container. The proposed location for storage and staging area shall be approved by the Park Manager prior to the delivery / storage of any materials at the site.

5. The Contractor shall provide any materials or supplies that have not been specifically mentioned, but are necessary for the complete, safe and satisfactory completion of all parts of the Project as if specified, herein, and at no additional cost to the State.

B. Basis-of-Design Products and Systems; Product Standards:

1. New Metal Roof Panels: 26-gauge metal panels that match the profile and dimensions of the surrounding metal roof panels.

a. Existing panels resemble the industry standard Purlin Bearing R

(PBR) panel with rib spacing of 12” O.C.

b. Approximate dimensions: 36-inch x 120 inches.

c. Material and Finish: ASTM A792 steel sheet with aluminum-zinc alloy coating (aka, Galvalume®).

d. Performance Certifications: ASTM E1646 & ASTM E1680 rated for water resistance and air leakage resistance, respectively;

UL 580, Class 90 for wind uplift resistance.

2. New Flashings at Roof Penetrations:

SANDY POINT STATE PARK BUILDING C ROOF REHABILITATION IV-6

a. Plumbing Vent: No-caulk, 2.5 lb. Lead Boot Flashing replacing existing elastomeric; fabricated to match roof slope.

b. Radiant Heaters’ Exhaust Vent: No-caulk, 2.5 lb. Lead Flashing boot replacing existing elastomeric type; fabricated to match roof slope. Reinstall the existing roof flue assembly with cap flashing overtop.

c. Acceptable Manufacturer: GAF Master Flow® Lead Flashings.

d. Shop drawing of Lead Flashing of Radiant Heater Exhaust Vent is mandatory; submit for review by DNR Project Manager.

e. Deck Sealant (to seal lead boot to metal deck): GSSI MB-10A

Elastomeric Butyl Rubber Sealant, 7/8” wide x 3/16” thick.

f. Lead Boot Deck Fasteners: Galvanized Metal Roof Boot Screws, #14 x 7/8" long, manufactured by Aztec Washer Inc.

3. Restoration Coating for Low-slope Metal Roofs: Tremco Solargard® 6083 water-based, acrylic, elastomeric roof coating system, or an approved equal product. Refer to supplementary specification Section 070150.71 –

Rehabilitation of Metal Roofing.

4. New Gutters and Downspouts: Basis-of-Design: Commercial Aluminum

Box Gutters and Smooth Box Downspouts by Roof Drainage Components

& Accessories (RDCA) or an approved equal manufacturer:

g. Gutters: A style box, 8-inch wide, 0.040-inch thick aluminum with structural aluminum support brackets and hidden hangers; expansion joints restricting continuous gutter run to 30

LF.

h. Downspouts: 0.040-inch thick, 3” x 6” wide with all necessary outlets, offsets, elbows, and straps. Total of ten (10) in continuous lengths.

i. Furnish with end caps, stainless-steel fasteners, and sealant.

i. Fasteners to be Speed Master® #10 x 1-1/2” hex head with washers or equivalent.

ii. Fasteners for downspout straps and gutter outlets to be #8 x

½” hex head.

iii. Sealant: Tremco TremSEAL Pro polyurethane or an approved equal product; white color.

j. Color: Petersen Aluminum PAC-CLAD Bone White.

k. Gutter Screens: 8-inch-wide aluminum alloy gutter guard mesh.

SANDY POINT STATE PARK BUILDING C ROOF REHABILITATION IV-7

5. Rust Converter: Cortec CorrVerter (water-based) Rust Primer, or an approved equal product, to be used over corroded fasteners and structural steel beams.

6. Primer and Finish Paint for Structural Steel: Sherwin-Williams Pro

Industrial Acrylic Semi-Gloss or an approved equal product.

a. Apply as both the primer and finish coat for a total of two coats.

b. Color: Approximate the PAC-CLAD Bone White proposed for the gutters and downspouts from among the paint manufacturer’s standard colors. Submit color chart to the DGS Inspector and

DNR Project Manager for selection.

7. Roof Insulation: Vapor retarder faced, fiberglass blanket insulation, ASTM D1790 (low temperature-resistance), ASTM C1136, Type IV; ASTM C665 (mold-resistant), ASTM E84 Class A..

a. R-19, 6” thick x 36” wide x 120” long with 3-inch tabs.

b. Vapor retarder/radiant barrier facing consisting of white scrim-reinforced polypropylene laminated to metalized polyester film.

c. Install on the underside of steel roof panels with adhesive-backed stick fasteners with washers at 16” O.C. max.

d. Seal seams between new and adjacent insulation with 5.0-mil thick x 6-inch-wide reinforced aluminum seam tape.

7. SUBSTITUTIONS:

A. Substitution Limitations: Requests for substitutions will be considered in accordance with the provisions of Sections 5.03 – Substitutions and 5.04 –

Approved Equals in the MD DGS General Conditions Between Owner and

Contractor.

8. METHOD OF WORK:

A. General:

1. All work shall be performed in accordance with the appropriate trades and in a professional manner.

2. The Contractor shall coordinate all work with the various trades and suppliers in order to complete the project expeditiously and within the

SANDY POINT STATE PARK BUILDING C ROOF REHABILITATION IV-8

time limits of the contract.

3. All work shall be performed in accordance with applicable DGS Contract requirements and local Building Codes.

4. All work shall be performed in the best and most professional manner by mechanics skilled in their respective trades.

5. In the event of damage to State property during the work, the Contractor shall promptly repair or replace items damaged to the satisfaction of the

DNR Project Manager at no additional cost to the

State.

6. Where applicable, all materials and supplies shall be installed in accordance with the manufacturer’s written instructions as if specified herein.

7. Throughout the project the Contractor shall schedule and coordinate all work with the Park Manager to minimize disruption to Park operations.

8. The Contractor shall maintain the job site in a safe, neat, and orderly manner throughout the entire project.

9. The Contractor shall be responsible for the removal and proper disposal of all project-related debris throughout the duration of the project.

10. Throughout the duration of the project the Contractor shall take steps to maintain a weatherproofed roof; and any other protection for State property by the appropriate means of plywood, tarps, plastic sheeting, etc.

until the project has been completed.

11. The Contractor shall provide and maintain all necessary barricades, signs and other control devices; and shall take all necessary precautions for the protection of the work and safety of the public.

12. The Public Access to the building shall be properly protected when necessary; and no building emergency exits may be obstructed or blocked in any way.

13. The Contractor shall perform any work that has not been specifically mentioned but is reasonably implied and is necessary for the safe and

SANDY POINT STATE PARK BUILDING C ROOF REHABILITATION IV-9

satisfactory completion of the project, as if specified herein and at no

B. Execution of Specific Categories of Renovation:

1. Demolition.

a. Remove and properly dispose of the seventeen (17) fiberglass skylights panels on the roof.

b. Remove and properly dispose of the existing lightning protection system; abandon in place any attachment hardware that is fastened through the metal roof deck or fascia.

c. Remove and properly dispose of the existing gutters and downspouts; abandon the straps in place and cut back flush with the edge of metal roof panels.

2. Metal Panel Installation Over Former Skylights.

a. Obtain and install 26-gauge, Galvalume® steel panels that match the profile and dimensions of the surrounding metal roof panels.

b. The new panels will be coated along with the rest of the roof with specified restoration coating. Consult the restoration coating manufacturer for compatibility of its primer with the metal panel’s factory finish.

c. Obtain fasteners and washers from the manufacturer of the metal roof panels; install in strict accordance with the manufacturer’s instructions and as prescribed by UL 580 for achieving the Class

90 rating.

3. Batt Insulation.

a. Obtain and install insulation in a continuous blanket to matching the width and length of each roof opening (approximately 36” wide by 120” long).

b. Fasten at a maximum of 16” O.C. in each direction with the specified stick pin fasteners applied to the underside of the new roof panels.

c. Overlap the flanges with the existing, adjacent layers of insulation and seal seams with specified reinforced foil tape.

SANDY POINT STATE PARK BUILDING C ROOF REHABILITATION IV-10

4. Replacement Flashings for Roof Penetrations.

a. Fabricate lead boot flashings to conform to the profile and slope of the existing steel roof panels.

b. When fabricating the lead boot flashing for the gas flue, take into account the juncture of the raised horizontal chase. Remove the steel cover of the chase as required to install the lead boot flashing beneath.

i. Replace the chase cover using the specified butyl sealant beneath the leading edges.

ii. Replace the fasteners with the specified new if the old ones are covered with an advanced state of rust.

c. Apply the specified butyl tape sealant in continuous strips beneath the leading edges of the flashings.

d. Firmly seat the flashings in the butyl sealant and install the specified fasteners at a maximum of 2” O.C. on all sides.

e. Once fastened, apply an elastomeric sealant along the joint between the flashing and the metal roof panels. Sealant is to be a type recommended by the restoration coating manufacturer.

5. Roof Restoration Coating: Substrate Preparation and System Application.

a. Refer to supplementary specification Section 070150.71 –

Rehabilitation of Metal Roofing.

6. Gutter and Downspout Installation.

a. Install the gutters using the specified support brackets and hidden hangers secured with the specified stainless-steel screws.

b. Support brackets and hidden hangers are to be spaced a maximum of four (4) feet and two (2) feet O.C., respectively.

c. Install the specified gutter guard mesh fully seated in gutters, in continuous, uninterrupted runs.

d. Seal all holes left by the removal of the original downspout attachment hardware in the metal siding with LDPE plugs made for the purpose (ex: Sheet Metal Plugs by Essentra Components; in manufacturer’s white). Obtain plugs that match the size of the holes.

e. Install each downspout approximately in same location as the original.

f. Connect gutter outlets to gutters using specified stainless-steel zip screws.

SANDY POINT STATE PARK BUILDING C ROOF REHABILITATION IV-11

g. Install each downspout with a minimum of four straps equally spaced.

h. Clean off and resituate the splash blocks to align the downspout outlets.

7. Cantilever Steel Beams and Bolts.

a. Wire brush away any flaking or paint and rust, in accordance with the manufacturer’s instructions.

b. Apply the specified rust converter to the wet mil thickness required by the manufacturer over all surfaces of the steel beams and bolts.

Repeat the process as required to successfully eliminate the rust, penetrate to bare metal, and form the desired iron tannate and protective layer.

c. While the product is still wet, protect it from rain.

d. Install the missing bolts, nuts, and washers at the bracket at the left of the door opening. Hardware shall match the nearby existing.

e. Once the rust converter is dry, apply the specified Industrial

Acrylic Semi-Gloss paint system to all surfaces of the cantilever beams including bolts.

9. WARRANTY AND GUARANTEE:

A. The Contractor shall guarantee all work for a period of two (2) years from the date of Substantial Completion. Any roofing system and flashings defects; and sealant and adhesive failures related to the work of this project found within the warranty period shall be corrected, repaired, or replaced by the Contractor at no

B. The Contractor shall provide to the DNR Project Manager all manufacturer’s warranties, guarantees, owner’s manuals, etc., for the roofing system, flashings, sealants, adhesives, and for other all materials used on this project. All information shall be neatly compiled in a three-ring binder(s) and be submitted to the DNR Project Manager at the time of Substantial Completion of this project.

10. GENERAL REQUIREMENTS:

A. The Maryland Dept. of Natural Resources “Instructions to Bidder for

Construction Projects” and “General Conditions” are hereby made part of these specifications.

SANDY POINT STATE PARK BUILDING C ROOF REHABILITATION IV-12

B. All work shall be coordinated with the Park Manager and DNR

Project Manager at the work initiation meeting.

C. The Contractor shall complete the project within 60 calendar days of the start date.

D. The completed project is subject to the inspection and approval by the DNR

Project Manager.

E. The Contractor shall provide all signage, barricades, etc., to insure a safe work area for his employees and for the general public and state workers that may be working inside or around the Central Storage and Distribution Center

Compound throughout the contract period.

F. The Contractor shall notify his workers to adhere and follow all park regulations posted on every bulletin board in the park. Regulations posted include no speeding, require the use of seat belts, stopping at stop signs, no drinking of alcohol or drug use; and to be watchful for all wildlife. Employees should have either company IDs or valid, state-issued IDs on their person at all times.

11. METHOD OF BIDDING:

A. All Bids shall be submitted online via eMaryland Market Place Advantage

(eMMA). NO PAPER BIDS will be accepted.

B. On the Bid Form opposite "Total Bid" the Contractor shall insert a bid price defined as the cost to complete all work described herein.

12. METHOD OF PAYMENT:

A. After satisfactory completion of the project as specified herein, the Contractor shall submit an invoice to the DNR Project Manager for approval, processing, and payment.

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SANDY POINT STATE PARK BUILDING C ROOF REHABILITATION IV-13

V. DRAWINGS AND SUPPLEMENTARTY SPECIFICATIONS

1. The following drawings and supplementary specifications are attached and should be considered part of these specifications.

24” x 36” Drawing CS Project Information; State, Vicinity, and Location

Maps

24” x 36” Drawing A-1 Aerial of Central Storage and Distribution Center;

Bird’s Eye View of Building C; Closeup of Building

Roof in Plan; Closeups of Cantilever Beams

8-1/2” x 11” Section 070150.71 - Rehabilitation of Metal Roofing

VI. ALTERNATES AND UNIT PRICES

1. UNIT PRICES: None.

2. ADD ALTERNATES: None