HUL VOR Roof Replacement SOW_revised_2.28.23_1.pdf

including all associated conduits and wiring. The center VOR antennas and DME antenna inside of the existing fiberglass teepee will be removed by the FAA. All work must be accomplished with the assistance of the FAA. Any penetrations exposed in the roof as a result of the removal of these antennas shall be temporarily covered and weatherproofed until the new roof is installed to prevent water from entering the inside of the building. All antennas and associated hardware shall be turned over to the FAA. The 16 monitor antennas shall be set aside and protected from damage.

2.) Remove all grounding down conductors and PVC conduit down to the existing building 4/0 counterpoise (2 feet deep and approx. 3 feet from exterior of building) that exists around the perimeter of the building. The counterpoise shall remain in place.

3.) Contractor shall carefully remove the existing fiberglass teepee from the VOR roof by means of a crane / telehandler. The existing fiberglass teepee will be refurbished for use at another location. The Contractor shall coordinate the on-site pick-up and transportation of the fiberglass teepee with the company doing the refurbishment as follows:

T Coyman Enterprises Terry Coyman Cell (603) 396-3269 tcoyman@tcoymanenterprises.com

The contractor is responsible for all costs related to the removal and loading of the teepee (removal from the roof and loading onto the truck from T Coyman Enterprises). The Contractor is not responsible for payment to T. Coyman Enterprises for costs related to the transportation of the fiberglass teepee, those costs will be borne by the FAA. Approximate dimensions for tepee; 16 feet tall, 6 foot diameter at the base, 2” wide flange all around screwed / bolted to roof deck (covered with roofing cement / flashing / roofing material).

Tepee weighs approximately 800 lbs.

4.) If the teepee is removed prior to the refurbish contractor’s trailer arriving on site, the fiberglass teepee shall be securely tied down. The teepee shall be kept upright and be placed on wood timbers and tied down with strapping to prevent it from tipping over. The contractor shall have the means necessary to load the teepee on to the refurbish contractor’s trailer at the coordinated time.

5.) Demolish and remove the existing roof membrane down to the roof deck for disposal. The existing roof membrane is modified bitumen with 1 inch thick polyiso board insulation.

Beneath the asphaltic roof membrane are metal 18 in. x 24 in. terne plates soldered together, which forms a counterpoise.

6.) Once the roof membrane is properly removed, the Contractor shall remove the existing T&G wood decking at points that extend beyond the outer perimeter of the building.

Statement of Work - Houlton VOR Roof Replacement - Revision 1 - 2/28/23

Project: Houlton (HUL) VOR, Removal of Existing Roof and Installation of a New Pitched Roof.

Location: Off Westford Hill Road, Hodgdon, ME 04730. Access Road to the site is approximately 2000 feet long. (LAT 46.0395 LONG -67.8341)

General: The Contractor shall provide all material, equipment (unless stated otherwise), supplies, transportation and labor to complete the specific scope of work. All work to be priced out in accordance with Davis-Bacon Wage Rates.

1.) Contractor shall remove the 16 monitor antennas mounted on the perimeter of the roof mailto:tcoyman@tcoymanenterprises.com

7.) Cut the existing structural steel beams that support the roof counterpoise at a point 30 inches from the exterior walls of the building, and remove all structural steel components beyond these points. This item includes four columns / posts and their related piers.

Remove concrete to a depth of 12” (min) below grade. Any / all sections that are cut shall be capped or boxed out so as to not create a nesting area for birds and rodents.

8.) The roof system has been tested for asbestos containing material (ACM). No asbestos was detected.

9.) The structure is known to contain lead at the following locations:

• Lead based paint on the wood decking

• Lead based paint on the steel beams

• Lead in the solder joints of the terne plates

Should the above building components be impacted by the planned roof replacement/repair project, the Contractor is responsible for compliance with all applicable State and Federal regulations regarding the safe removal/handling and disposal/recycling of the affected components. Construction and demolition debris generated as a result of this project shall be disposed of at a licensed solid waste disposal facility. Contractor shall supply waste disposal receipts for all construction debris.

10.) The contractor shall supply and install prefabricated roof trusses per attached specifications and attached sketch. The contractor is responsible for field verifying all dimensions including bearing points. The prefabricated trusses shall meet all local code requirements. The truss design shall be stamped by a State of Maine Licensed Professional Engineer. The roof shall have a 30 inch overhang on four sides. The roof shall have a 5:12 pitch.

11.) Roof sheathing shall be an integrated roofing system with flashing tape and/or liquid flashing at all seams for maximum moisture projection and high wind infiltration (ZIP System Roof Sheathing or equal).

12.) Install metal roof and all associated flashing required to make system weatherproof per attached specifications. Contractor to provide product color availability for selection by FAA.

Work to include continuous ridge vent and soffit vents (provide a minimum of 4 square feet of soffit vents evenly distributed along perimeter of building). Substitute products may be acceptable, submittal required.

13.) Install vinyl siding on both gable ends to match existing vinyl siding on the building. Provide and install all flashing/covering for fascia and soffit surfaces. The underside of the tongue and groove decking shall not be visible at project completion. This item includes framing as necessary to support fascia / soffit. Please note that this facility is exposed to high winds, the framing and attachment methods shall take that into account. Discuss framing and attachment methods on site with COR before starting work.

14.) Install lightning protection on new roof per attached drawings.

15.) Install blown-in insulation in attic space above existing roof deck and below the new roof.

The insulation shall have a minimum 38 R-value.

16.) Install DME concrete foundation and associated power/control conduit, junction boxes, and grounding per the attached “DME Foundation Installation Plan”. Note 6 of Drawing BML- 1801792-S001 does not apply. Final location to be as directed / coordinated with COR on site, but will not be further than 30 feet from the face of the building.

17.) Supply and install DME Support Structure (LB2650NFX as manufactured by Jaquith Industries, Syracuse, NY (315)478-5700, or equal). The following items shall be included:

• LB2650NFX BUEC Non-Standard Length Stabilizer Rods with L2812SP DME Top Cap with Swivel Plate. This includes: L5003 Anchor Bolt Set, L5004 Anchor Plate, L5005H H.D. Lifting Device, L5006 Jack Assembly, L5016 Maintenance Stand, and L5008 Epoxy

• L5027 MG/40 Foundation Template Submittal required for ‘or equal’ items.

18.) Install 18in. x 16 in. x 8in. NEMA 4X Junction box, GRSC legs, and liquid tight conduit from junction box to the base of the DME Support Structure.

19.) Mount DME antenna on DME Support Structure with FAA oversight.

20.) In the interior of building, install junction boxes, conduit, and wiring per attached “DME

Foundation Installation Plan” sketch. 3-1/C #12 THHN wire shall be installed from the designated location in the power panel to the DME antenna through conduits/junction boxes and terminated at obstruction light on top of DME antenna.

21.) Contractor to provide pull rope in conduit run from the junction box at the base of the DME Support Structure to the DME cab in the interior of the building.

General Notes / Execution:

• Work to be completed within 60 days of receiving Notice to Proceed.

• Informational submittals required for products other than what is specified.

• Adhere to all manufacturer’s instructions / recommendations for all products.

• All work to be performed Monday through Friday between the hours of 07:00 AM to 4:00 PM or as otherwise coordinated with COR. Anything beyond the agreed upon work hours will be subject to the availability of SSC personnel and the approval of the COR. Contractor shall obtain approval of COR a minimum of 48 hours in advance of any proposed additional work hours.

• FAA will provide an escort at all times.

• FAA will locate underground cables and conduit prior to any excavation. Contractor shall hand-dig within three feet of any underground cabling / conduit.

• Contractor to use caution at all times with the operation, maneuvering, and placement of heavy equipment within the project area. Contractor shall use extreme caution when deploying outriggers of said equipment, so as to not cause damage to underground FAA infrastructure.

• Any areas disturbed during the course of work shall be returned to the condition that existed prior to the start of work, to the satisfaction of the COR.

• All work subject to the following provisions for Operational Risk Avoidance and Safety:

a. Operational Risk Avoidance:

1) General: The contractor shall NOT begin to perform any work until FAA personnel has taken the facility out of service and informs the contractor that work can commence.

2) Coordination of Work Affecting Operational Systems or Personnel. Coordinate all work that has any or may have any impact on any operational systems through the COR. Cease any work that is adversely impacting the operations of the facility and immediately repair or restore any portion of the operational system that has been damaged or suffered diminished performance as a result of the Contractor’s activities.

3) Avoid actions deemed detrimental or increasing risk to the facility’s mission or equipment.

4) Avoid activities that create objectionable noise, release detectable odors, or generate smoke. If required provide provisions to mitigate such actions.

5) Avoid activities that raise temperature or decrease air volume in electronic equipment spaces, electrical equipment spaces and other areas that would suffer potential failures or reduced performance from such changes.

6) Avoid activities that change temperature or air volume in occupied spaces to the maximum extent possible.

7) All space temperature and air volume changes must be scheduled and approved in advance by the COR.

8) Circuit Breakers. Circuit breakers and disconnect switches will be operated by FAA personnel only. Contractor personnel must not operate circuit breakers or any other electrical disconnecting device. FAA will lockout / tag out equipment to insure personnel safety while safeguarding facility operations.

b. Safety:

Attachments:

1) Perform all work safely and in accordance with the following requirements.

2) Comply with FAA Electrical Standards, FAA Safety Standards, National Electrical

Code, National Fire Code, OSHA, manufacturer’s recommendations, local, state, and federal regulations, other authorities having jurisdiction, and local facility.

3) Workers must use Personal Protective Equipment (PPE) as required by code, regulation, standard, or manufacturer’s recommendation.

1. Existing Roof Sketch (pg 5)

2. New Roof Plan and Elevation Sketch (pg 6)

3. DME Foundation Installation Plan Sketch (pg 7)

4. DME Foundation Installation Section A-A and B-B Sketch (pg 8)

5. FAA Drawing DME Antenna Equipment Layout (pg 9)

6. FAA Drawing DME Concrete Foundation Details (pg 10)

7. LB2650NFX x 20ft with L2812SP Top Cap Drawing (pg 11)

8. Metal Roof-138T Specifications (pg 12-19)

9. Prefabricated Roof Truss Specifications (pg 20-23)

10. Photo of existing VOR Building (pg 24)

11. FAA-STD-019F, Lightning and Surge Protection, Grounding, Bonding, and Shielding Requirements for Facilities and Electronic Equipment.

Attached below:

Attached as separate document:

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4.00"

5.98"

1 MG-30 LIR TOWER - DME

DME POWER & RF J-BOX

NOT TO SCALE

Q002

B

Q002

NOT TO SCALEQ002

TOP CAP

DME ANTENNA

Q002

NOT TO SCALE

A

6 ANCHOR PLATE

NOTES:

B

Q001

S001

.5

(GFM)

3.25" DIA.

DME ANTENNA

OB LIGHT

GROUND ROD

BY 12" TALL (GFM)

COLLAR 8" DIA

A

NOT TO SCALEQ002

MG-20 (TILT DOWN) W/ DME

Q001

(TILT-DOWN) FRAME

MG-30 MOUNTING4

STABILIZER RODS

MG-20 LIR TOWER

FOUNDATION

AROUND ENTIRE

GEOTEXTILE FABRIC

PACK OVER

6"LAYER OF HARD

FINISHED GRADE

S001

MG-30 FOUNDATION PLAN

STRUCTURE FOR DME ANTENNA X 20' TALL)

(JAQUITH INDUSTRIES L4030INX INVERTED STYLE SUPPORT

TOP CAP (GFM)

TURNBUCKLE, 1/2" X 6" TAKE-UP

GALVANIZED STEEL

LOCKNUT

HEX HD BOLT WITH HEX

5/8"-11 X 2 1/2" LG

DME RF J-BOX

NEMA 4X

18" x 16" x 8"

(2 PLS)

2" GRSC

2" GRSC

2" COUPLING

IN FOUNDATION

2" GRSC SWEEP

2" COUPLING

& RF J-BOX

DME PWR

JUNCTION BOX

18"x16"x8" NEMA 4X (NON-METALLIC)

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ENGINEERING SERVICES

DME

PROJECT ENGINEER MGR: ENGINEERING CENTER

THIS DRAWING PRODUCED ON NEW ENGLAND REGION MICROSTATION SYSTEM

ATO - TECHNICAL OPERATIONS EASTERN SERVICE AREA

W/ 4/0 BARE CU

1" PVC

COUNTERPOISE

4/0

BERLIN REGIONAL AIRPORTBERLIN

AND ELECTRICAL DRAWINGS FOR INTERIOR GROUNDING REQUIREMENTS.

ONLY EXTERIOR GROUNDING IS SHOWN: REFER TO EQUIPMENT INSTALLATION

SURFACE AND SUBSURFACE EARTH MATERIAL RENDERED TRANSPARENT.

3. SITE GROUNDING DETAILS ON THIS DRAWING ARE SHOWN WITH ALL

LIGHT IS APPROXIMATE 28.0 FEET.

2. DME OVERALL HEIGHT FROM GRADE TO TOP OF OBSTRUCTION

WELDED UNLESS OTHERWISE INDICATED.

1. ALL UNDERGROUND GROUND CONNECTIONS ARE EXOTHERMICALLY

TO LIR MAST

2 1-1/2" LIQUIDTIGHT

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BASE SQUARE JUNCTION BOX

LIR MAST

SQUARE JUNCTION BOX

MG-30 MOUNTING FRAME

JUCTION BOX

18" X 16" 8" NEMA 4X

FLEX CONDUIT TO

2 - 1-1/2" LIQUIDTIGHT

2 - 1-1/2" NIPPLE

2- 1 1/2" LIQUIDTIGHT

DME EQUIPMENT INSTALLATION

BML-1801792-Q002

04/12/2020180179204/20/2020

INSTALL DME

CONSTRUCTION, DT# 18811

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DEPARTMENT OF TRANSPORTATION

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APVD

01' 1' 3'2'

SCALE: 3/4" = 1'-0"

NOTES:

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ANCHOR PLATE

B

S001

S001

A

S001

S001

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4 1/2"

4 1/2"

9"

8'-0"

4'-0"4'-0"

FRAME

MOUNTING

MG-30

7"3'-5"3'-5"7"

(TYP)

ANCHOR BOLTS

WINCH

(TYP)

BOLTS

ANCHOR

FOUR SIDES

1" CHAMFER,

1 1/8"

5-#5

(2 PLS)

SWEEP

2" GRSC

8'-0"

8'-0"

S001

S001

(4 PL)

COUPLING

2" GRSC

SWEEPS

2" GRSC

NOT TO SCALES001

ANCHOR BOLT

4"

" (MAT'L ASTM A325)

3/4" DIA J-BOLT (GALVANIZED)

1"

1"

3"

CONCRETE FOUNDATION

TOP OF FINISHED

(2 PL)

TACK

(MAT'L ASTM A325)

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PROJECT ENGINEER MGR: ENGINEERING CENTER

CONSTRUCTION, DT# 18811

THIS DRAWING PRODUCED ON NEW ENGLAND REGION MICROSTATION SYSTEM

ATO - TECHNICAL OPERATIONS EASTERN SERVICE AREA

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5-#5

GRADE

LONG 071-11'-10.29"W

LAT 44-38'-0.72"N

CENTER OF DME ANTENNA

FABRIC

GEOTEXTILE

(3' AROUND ALL SIDES)

GEOTEXTILE FABRIC

PACK GRAVEL OVER

6" LAYER OF HARD

S001

(4 PL)

B

S001 SCALE: 3/4" = 1'-0"

DME ANTENNA FOUNDATION SECTION

NUT & WASHER

3" FROM TOP OF CONCRETE

LEVELING NUT & WASHER

FOR TILT DEVICE

BY *) TO PROVIDE RESTRAINT

WINCH ANCHOR BOLTS (INDICATED

NUT & WASHER ONLY NEEDED FOR

TOP OF CONCRETE

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LICENSED STATE OF NEW HAMPSHIRE LAND SURVEYOR.

6. CONCRETE FOUNDATION SHALL BE LAYOUT BY GPS BY A

BE 1'.

OF THE CONCRETE, MINIMUM SPACING BETWEEN EACH SHALL

5. THE NUMBER OF REBAR CAGES WILL DEPEND ON THE DEPTH

SHALL BE 6'.

NO LEDGE IS EXPERIENCED THE DEPTH OF THE FOUNDATION

DOWEL REBAR INTO LEDGE AS INDICATED. IN THE EVENT THAT

4. CONTRACTOR SHALL EXCAVATE TO LEDGE SURFACE AND

WITH THE APPROVAL OF THE RESIDENT ENGINEER.

3. J-BOLTS MAY BE REPLACED WITH HILTI CHEMICAL ANCHORS

TIE WIRE TO BE 16 GAUGE OR LARGER ANNEALED IRON.

E. REINFORCEMENT STEEL PER ASTM A 615, GR. 40;

D. PLACE ALL CONCRETE ON UNDISTURBED SOIL OR LEDGE.

CONCRETE.

C. SECURELY PLACE ALL ANCHOR BOLTS PRIOR TO PLACING

B. SOIL BEARING CAPACITY = 3000 PSF. (MIN.)

PORTLAND CEMENT)

HIGH EARLY STRENGTH CONCRETE (TYPE 3

A. CONCRETE STRENGTH = 3000 PSI@ 28 DAYS, (MIN.)

2. CONCRETE FOUNDATION:

CAPACITY = 2.

STRUCTURE. MINIMUM SAFETY FACTOR FOR SOIL BEARING

1. DESIGN LOAD FOR FOUNDATION: 25 PSF ON EXPOSED AREA OF

4'-0"

10"

9"

DME ANTENNA FOUNDATION DESIGN

INSTALL DME

BML-1801792-S001

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DRAWN

DESIGNED

SUBMITTED BY

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DEPARTMENT OF TRANSPORTATION

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APVD

07 41 13

METAL ROOF PANELS

138 T

PART 1 GENERAL

1.1 SECTION INCLUDES

A. Standing-seam roof panels. Panels shall be continuous, one-piece, preformed, prefinished single length.

B. Metal roofing accessories.

C. The scope of work includes, but shall not be limited to: preformed metal roof panels, flashing required to weatherproof the system, related accessories necessary for attachment of the roofing system, all butyl tape and sealant used in conjunction with the roofing system, and necessary attachment hardware as required to meet the performance standards and complete the roofing enclosure.

1.2 RELATED SECTIONS

A. Section 07 62 00 - Sheet Metal Flashing.

1.3 REFERENCES

A. American Society of Civil Engineers: ASCE -7 - Minimum Design Loads for Buildings and Other Structures, version adopted by local Building Code authority having jurisdiction.

B. ASTM A792 - Specification for Steel Sheet, 55% Aluminum-Zinc Alloy-Coated by the Hot-Dip Process.

C. ASTM E1592-01Standard Test Method for Structural Performance of Sheet Metal Roof and Siding System by Uniform Static Air Pressure Difference

D. ASTM E1680-95 (Reapproved for 2003) - Standard Test Method for Rate of Air Leakage Through Exterior Metal Roof Panel Systems.

E. ASTM E1646-95 (Reapproved for 2003) Standard Test Method for Rate of Water Penetration Through Exterior Metal Roof Panel Systems By Uniform Static Air Pressure Difference.

F. Factory Mutual 4471 Approval Standard for Class 1 Panel Roofs:

1. Section 4.1 Combustibility-From Below Roof Assembly

2. Section 4.2 Combustibility-From Above Roof Assembly

3. Section 4.3 Wind Uplift Resistance

4. Section 4.4 Foot Traffic Resistance

5. Section 4.5 Hail Damage Resistance

6. Appendix G- Susceptibility to Leakage Test Procedure for Class 1 Panel Roofs.

G. ASTM E2140- Standard Test method for water penetration of metal roof panel systems by static water pressure head.

H. Building Code – as approved by local authority having jurisdiction.

I. SMACNA - Architectural Sheet Metal Manual, Latest Edition.

J. Underwriter’s Laboratories:

1. UL 580 - Tests for Uplift Resistance of Roof Assemblies.

2. UL 1897 - Uplift Tests for Roof Covering Systems, latest Edition.

1.4 SUBMITTALS

A. Product Data: Manufacturer literature indicating product specifications, installation instructions, and standard construction details.

B. Shop Drawings: To be prepared by metal roof system manufacturer.

1. Submit roof plan showing panel layout.

2. Provide metal roof flashing shop drawings.

a) Indicate gage and finish of materials.

b) Indicate fastener type, finish and spacing.

c) Indicate locations of field applied sealant.

d) Indicate location size and gauge of all back up plates.

3. Roof Panel Attachment:

a) Roof plan with wind uplift pressure calculations at field, corner and perimeter areas according to version of ASCE-7 referenced by locally-adopted Building Code and the authority having jurisdiction.

b) Roof plan indication roof clip spacing pattern at field, corner, perimeters and where panels are to be fixed from thermal movement.

c) Roof panel attachment plan must be stamped by State of Maine licensed professional engineer certifying roof attachment meets local Building Code requirements for wind uplift.

C. Engineering Calculations: Submit wind uplift pressure calculations according to ASCE 7 Wind Speed for project location with respect to appropriate Importance Factor, Exposure category and Safety Factor. Calculations shall be sealed by a State of Maine licensed professional engineer, licensed to practice structural engineering in the State of Maine.

D. Samples:

1. Submit two samples, 12" long, full width panel, showing metal gage, seam and required finish.

2. Two samples each for roof panel clip, bearing plate and clip fastener.

3. Submit color samples for Engineer’s selection.

4. Submit sample warranties:

a) Coating Warranty.

b) Manufacturer Water Tightness Warranty complying with this Specification.

c) Installer Warranty.

E. Certification:

1. Submit roof panel manufacturer's certification that fasteners, clips, backup plates, closures, roof panels and finishes meet specification requirements, wind uplift requirements.

2. Submit roof panel manufacturer’s certification that installer meets requirements to install roof system and is qualified to obtain required warranties.

3. Test Reports –Certified test results that indicate roof system meets or exceeds design and performance criteria. Testing to include:

a) Uplift Testing

(1) Underwriters Laboratory: Submit documentation that panel System has been tested for uplift in accordance with Underwriters Laboratories UL-580 and UL 1897 and has been tested to failure.

(2) Test reports prepared by independent test laboratory and stamped by a professional engineer substantiating that roof system will meet the allowable wind pressures with a safety factor of 2.0.

b) Static Water Testing Certification:

(1) The panel system shall be tested in accordance with FM4471 Appendix G, and pass with no leakage. The test specimen must successfully withstand being submerged under 6” of water for a minimum period of 7 days.

c) Air and Water Testing Certification

(1) ASTM E1680 – Manufacturer’s test data for air infiltration rates up to 20 pounds per square inch differential pressure.

(2) ASTME1646- Manufacturer’s test data for water infiltration rates up to 20 pounds per square inch differential pressure.

d) Impact Resistance

(1) Submit documentation that panel system has been tested at Factory Mutual per FM 4471 Section 4.5 and is currently rated for “Severe Hail”

1.5 DELIVERY, STORAGE AND HANDLING

A. Deliver panels to jobsite properly packaged to provide protection against transportation damage.

B. Exercise care in unloading, storing and erecting panels to prevent bending, warping, twisting, and surface damage.

C. Store all material and accessories above ground on well skidded platforms. Store under waterproof covering. Provide proper ventilation to panels to prevent condensation build-up between each panel.

D. Remove from site panels which are damaged, or become water-stained during storage and handling.

Remove, and replace materials, which are installed damage, or stained.

1.6 WARRANTIES

A. Panel Coating: Minimum 20 year warranty. Furnish manufacturer's warranty panel coating warranty covering checking, crazing, peeling, chalking, fading, and adhesion.

B. Metal Roof Warranty:

1. Manufacturer’s Weather Tightness Warranty.

a) Warranties supplied by Metal Roof Installer or 3rd Party Warranties are not acceptable.

b) Minimum 20 year warranty

2. Coverage includes roof panels, roof flashing, roof penetrations and roof curbs.

1.7 DESIGN AND PERFORMANCE CRITERIA

A. Thermal Movement: Metal Roofing system, including flashing, shall accommodate unlimited thermal movement without buckling or excess stress on the structure.

B. Roof panel and trim attachments will be designed to satisfy the requirements of the roof design (shown in shop drawings).

C. Maximum wind uplift capacity of roof system shall be determined using certified results from UL 1897-98, Uplift Tests for Roof Covering Systems. Testing of the entire roof assembly shall be conducted in a UL-580 test chamber.

D. Panel system installation shall be in accordance with ASCE 7 Wind Speeds for project location with respect to appropriate Exposure category, Building Importance Factor and a Safety Factor of 2.0.

1.8 COORDINATION

A. Coordinate Work, with installation of other associated Work, to ensure quality application.

B. Coordinate Work with installation of associated metal flashings, roof sheathing system, and pre-fabricated trusses to ensure compatibility.

C. Coordinate Work to minimize foot traffic and construction activity on installed finished surfaces.

1.9 PRE-ROOFING CONFERENCE

A. Schedule meeting to discuss roof Work before start of work onsite.

B. Comply with requirements of roof Specification Section(s).

C. Required attendees: Contractor, metal deck & roof installer, metal roof system manufacturer’s representative, and any other subcontractors who may have work that requires roof access or traffic.

1.10 QUALITY ASSURANCE

A. Manufacturer: Manufacturer’s facility and equipment must undergo an annual quality assurance audit by Factory Mutual. This assures that manufacturers equipment, procedures and quality program are maintained to insure a uniform product consistent with that which was tested and FM Approved.

B. Installer Qualifications: Installer ("roofer") to perform the Work of this Section, which firm has no fewer than 5 years of successful experience with installation metal roof systems similar to those required for this Project, and is qualified by the roof panel manufacturer, for installation of manufacturer-warranted systems.

C. Field Measurements: Prior to fabrication of panels, take field measurements of structure or substrates to receive panel system. Allow for trimming panel units, where final dimensions cannot be established prior to fabrication.

PART 2 - PRODUCTS

2.1 ROOF PANEL SYSTEM

A. Basis of Design: 138T by Architectural Building Components, Houston, TX , or approved substitute, meeting the following requirements.

1. Factory-formed panel. Panels shall be symmetrical in design and shall be mechanically seamed with a field operated electric seaming machine provided by the manufacturer.

2. Minimum seam height 1 3/8 inches. Integral seam, double lock and snap together type panels are not acceptable

3. Panel system shall utilize both continuous and individual clips in order to maximize wind uplift resistance in edge and corner zones.

4. Clips used to attach panel to substrate shall provide minimum 3/8” air space between panel and roof deck to reduce heat transfer into the building envelope.

5. Seam cap matching panel finish with two rows of integral factory hot applied sealant.

6. Galvalume coated sheet steel, Type AZ-50, Grade 50 as described in ASTM A792; 24 gauge.

7. Finish: Two coat coil applied, baked-on full-strength (70% resin, PVF2) fluorocarbon coating consisting of a nominal of .25 mil dry film thickness primer, nominal dry film thickness of .75 mil color coat. Finish to be selected from manufacturer’s standard color selection. The back side of the material should be .25 mil. Primer and 0.25 polyester wash coat.

8. Roof panel system must allow individual roof panel removal and replacement from any point on the roof without damage to adjacent roof panel(s).

9. Panels must be furnished and installed in continuous lengths from ridge to eave with no overlaps. Panels too long to ship will be manufactured on site using manufacturers employees and equipment.

10. Panel surface characteristics to be chosen by Architect for roof panel manufacturer’s available types.

a) Smooth.

b) Striations.

c) Stiffener ribs

d) Plank

11. Manufacturer watertightness warranty, meeting requirements of this Section.

2.2 FASTENERS AND ACCESSORIES

A. Panel Clip Screw - screw required in wind uplift rating requirements for application, with corrosion-resistant coating, in length necessary to penetrate metal deck minimum 3/4 inch., as supplied by roof panel manufacturer.

B. Roof Panels Clip:

1. Intermittent Clip: 24 gauge grade 50 coated steel, 2 piece fixed clips minimum 8” long, designed to allow unlimited roof panel thermal movement and not contact roof panel cap, as supplied by roof panel manufacturer, marking meeting wind uplift requirements of this Section.

2. Intermittent Clip Bearing Plate: in gage, size and finish as supplied by and approved by roof panel manufacturer for use in roof panel manufacturer’s full assembly warranted systems.

3. Fiber Reinforced Polycarbonate Shim Plate: used in lieu of bearing plates in areas where deck is uneven to insure level finished panel surface.

4. Multi Span-Continuous Clip: as provided by roof panel manufacturer in edge and corner zones to maximize wind uplift performance and for full assembly warranted systems.

C. Trim and flashing will be of the same gage and finish unless approved otherwise by the metal roof system manufacturer.

1. Ridge closures, consisting of metal channel surrounding factory precut closed cell foam, will not be secured through the field of the panel.

2. Trim will be installed specifically as displayed in the manufacturer provided shop drawings.

Proposed changes must be approved in writing by the metal roof system manufacturer.

D. Concealed supports, angles, plates, accessories and brackets: in gage and finish as recommended, and furnished by manufacturer.

E. Accessory Screw: Size and screw type as provided by panel manufacturer for each use, with prefinished hex washer head in color to match panels where exposed to view.

F. Rivets: full stainless steel, including mandrel, in size to match application.

G. Field Sealant: Color coordinated primerless silicone, or high grade, non-drying butyl, as supplied by panel manufacturer.

H. Sealant Tape: non-drying, 100 percent solids, high grade butyl tape, as supplied by panel manufacturer, in sizes to match application.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Ensure surfaces are ready for panel application.

B. Inspect and ensure surfaces are free from objectionable warp, wave, and buckle before proceeding with installation of pre-formed metal roofing.

C. Ensure substrate is ready to receive metal roofing. Report items for correction and do not proceed with metal roof panel system installation until resolved.

3.2 INSTALLATION OF ROOF PANELS

A. Comply with and install roofing and flashings in accordance with all details shown on manufacturer’s approved shop drawings and manufacturer's product data and instructions, within specified erection tolerances.

B. Install field panels in continuous lengths, without endlaps. Remove and replace panels with endlaps.

C. Do not install panels damaged by shipment or handling.

D. Install intermittent clips with bearing plates and continuous clips according to pattern in wind uplift rating at field, corners and perimeter roof areas.

E. Fix panels at location depicted on reviewed shop drawing(s).

F. Breadpan roof panel at ridge, hip and headwalls.

G. Allow for 1 inch panel clearance at penetrations.

H. Install concealed supports, angles and brackets as furnished by manufacturer to form complete assemblies.

I. Remove roof panel and flashing protective film prior to extended exposure to sunlight, heat, and other weather elements.

J. Field-apply sealant tape and gun-grade sealant according to reviewed shop drawings and manufacturer’s requirements for airtight, waterproof installation.

K. Ensure sealant beads and tape are applied prior to sheet metal installation to achieve a concealed bead. Neatly trim exposed portions of sealant without damaging roof panel or flashing finish.

L. Align pipe penetrations to occur at center of roof panel. Report and have corrected improperly-placed penetrations before proceeding with panel installation. Remove and replace roof panels which have improperly-placed penetration flashings.

M. Install sheet metal flashings according to manufacturer’s recommendations, reviewed shop drawings and in accordance with provision of Section 07 62 00.

3.3 CLEANING

A. Clean exposed surfaces of Work promptly after completion of installation.

B. Clean mud, dirt, and construction-related debris from panels before panels are scratched or marred.

3.4 PROTECTION

A. Protect Work as required to ensure roofing will be without damage at time of final completion.

B. Do not allow excessive foot traffic over finished surfaces.

C. Do not track mud, dirt, or construction-related debris onto panel surfaces.

D. Replace damaged Work before final completion.

END OF SECTION

SPECIFICATIONS FOR METAL PLATE CONNECTED WOOD TRUSSES

1.01 WORK INCLUDED

Design, manufacture, and supply wood Trusses as shown on Construction Documents and as specified.

1.02 DEFINITIONS

A. BCSI: Guide to Good Practice for Handling, Installing, Restraining & Bracing of Metal Plate Connected Wood Trusses jointly produced by the Structural Building Components Association (SBCA) and the Truss Plate Institute (TPI).

B. Building: Structure used or intended for supporting or sheltering any use or occupancy.

C. Building Code: As it applies to a Building, any set of standards set forth and enforced by a jurisdiction for the protection of public safety.

D. Building Designer: Owner of the Building or the individual or organization who contracts with the Owner for the design of the Building Structural System and/or who is responsible for the preparation of the Construction Documents. When mandated by the legal requirements, the Building Designer shall be a Registered Design Professional.

E. Building Structural System: Completed combination of structural elements, Trusses, connections and other systems, which serve to support the Building’s self-weight and the specified loads to the foundation or ground.

F. Construction Documents: Written, graphic and pictorial documents prepared or assembled for describing the design (including the Building Structural System), location and physical characteristics of the elements of a Building necessary to obtain a Building permit and construct a Building.

G. Contractor: Owner of the Building or the person who contracts with the Owner, who constructs the Building in accordance with the Construction Documents and the Truss Submittal Package.

The term “Contractor” shall include those subcontractors who have a direct contract with the Contractor to construct all or a portion of the construction.

H. Cover/Truss Index Sheet: Sheet that is signed and sealed, where required by the legal requirements, by the Truss Designer, and depending on the legal requirements shall be permitted to contain the following information: (1) identification of the Building, including Building name and address, lot, block, subdivision, and city or county; (2) identification of Construction Documents by drawing number(s) with revision date; (3) specified Building Code; (4) computer program used; (5) roof dead and live loads; (6) floor dead and live loads; (7) wind load criteria from a specifically defined code (e.g., ASCE 7) and any other design loads (such as ponding, mechanical loads, etc.); (8) name, address and license number of Registered Design Professional for the Building, if known; (9) a listing of the individual identification numbers and dates of each Truss Design Drawing referenced by the Cover/Truss Index Sheet; and (10) name, address, date of drawing and license number of Truss Designer.

I. Owner: Person having a legal or equitable interest in the property upon which a Building is to be constructed, and: (1) either prepares, or retains the Building Designer or Registered Design Professional to prepare the Construction Documents; and (2) either constructs, or retains the Contractor to construct the Building.

J. Permanent Individual Truss Member Restraint: Restraint that is used to prevent local buckling of an individual Truss chord or web member due to the axial forces in the individual Truss member (see BCSI).

Sample Truss Specifications

K. Registered Design Professional: Architect or engineer, who is licensed to practice their respective design profession as defined by the legal requirements of the jurisdiction in which the Building is to be constructed.

L. Truss: Individual metal plate connected wood component manufactured for the construction of a Building.

M. Truss Design Drawing: Written, graphic and pictorial depiction of an individual Truss that includes the information required in item E of Section 1.03 Design.

N. Truss Designer: Person responsible for the preparation of the Truss Design Drawings. Where the legal requirements mandate a Registered Design Professional for buildings, the Building Designer and Truss Designer shall be a Registered Design Professional.

O. Truss Manufacturer: Person engaged in the fabrication of Trusses.

P. Truss Placement Diagram: Illustration identifying the assumed location of each Truss.

Q. Truss Submittal Package: Package consisting of each individual Truss Design Drawing, and, as applicable, the Truss Placement Diagram, the Cover/Truss Index Sheet, lateral restraint and diagonal bracing details designed in accordance with generally accepted engineering practice, applicable BCSI-defined lateral restraint and diagonal bracing details, and any other structural details germane to the Trusses.

1.03 DESIGN

A. Trusses shall be designed in accordance with ANSI/TPI 1, National Design Standard for Metal Plate Connected Wood Truss Construction and this specification. Where any applicable design feature is not specifically covered by ANSI/TPI 1 or this specification, design shall be in accordance with the applicable provisions of the latest edition of ANSI/AWC NDS - National Design Specification® (NDS®) for Wood Construction, and all applicable legal requirements.

B. Truss Manufacturer shall furnish Truss Design Drawings prepared in accordance with all applicable legal requirements.

C. If required by the Construction Documents and the Truss Manufacturer’s contract, the Truss Manufacturer shall furnish a Truss Placement Diagram which shall provide at a minimum the location assumed for each Truss based on the Truss Manufacturer's interpretation of the Construction Documents

D. Where required by the Truss Manufacturer’s contract, the local Building official or applicable legal requirements, the Truss Manufacturer shall submit the Truss Submittal Package to the Building Designer and/or the local Building official for review and approval prior to the manufacturing of the Trusses.

E. The Truss Design Drawings shall include, at a minimum, the following information:

1. Building Code used for design, unless specified on Cover/Truss Index Sheet,

2. Slope or depth, span, and spacing.

3. Location of all joints and support locations.

4. Number of plies if greater than one.

5. Required bearing widths.

6. Design loads as applicable, including:

• Top chord live load (for roof Trusses this shall be the controlling case of live, rain or snow load);

• Top chord dead load;

• Bottom chord live load;

• Bottom chord dead load;

• Additional loads and locations.

• Environmental load design criteria (wind speed, snow, seismic, and all applicable factors as required to calculate the Truss loads); and

• Other lateral loads, including drag strut loads.

7. Adjustments to wood member and metal connector plate design values for conditions of use.

8. Maximum reaction force and direction, including maximum uplift reaction forces where applicable.

9. Metal connector plate type, manufacturer, size, thickness or gauge, and the dimensioned location of each metal connector plate except where symmetrically located relative to the joint interface.

10. Size, species, and grade for each wood member;

11. Truss-to-Truss connection and Truss field assembly requirements.

12. Calculated span to deflection ratio and/or maximum vertical and horizontal deflection for live and for live plus dead load and KCR (creep factor) as applicable.

13. Maximum axial compression and tension forces in the Truss members.

14. Fabrication tolerance per ANSI/TPI 1.

15. Required Permanent Individual Truss Member Restraint location.

16. Truss Designer

2.01 MATERIALS

A. Lumber

1. Lumber used shall be identified by grade mark of a lumber inspection bureau or agency approved by the American Lumber Standards Committee, and shall be the size, species, and grade as shown on the Truss Design Drawings, or equivalent as approved by the Truss Designer.

2. Adjustment of value for duration of load or conditions of use shall be in accordance with

ANSI/TPI 1.

3. Fire retardant treated (FRT) lumber, if applicable, shall meet the specifications of the fire retardant chemical manufacturer, the Truss design and ANSI/TPI 1 and shall be re-dried after treatment to 19 percent maximum moisture content at temperatures not to exceed 160°F (71°C) in accordance with AWPA Standards C20. FRT lumber design values shall be developed from approved test methods and procedures that consider potential strength-reduction characteristics, including the effects of elevated temperature and moisture. Design values shall be approved by the authorities having jurisdiction. Lumber treater shall supply certificate of compliance.

B. Metal Connector Plates

1. Metal connector plates shall be manufactured by a SBCA member plate manufacturer and shall be of galvanized steel, aluminum-zinc alloy coated steel or stainless steel conforming to the requirements of ANSI/TPI 1. Minimum thickness in inches (or mm for metric units), including both uncoated and coated thicknesses, if galvanized and aluminum-zinc alloy coated, shall be specified for each type of metal connector plate. Working stresses in steel are to be applied to effectiveness ratios for plates as determined by test and in accordance with ANSI/TPI 1.

2. In highly corrosive environments, special applied coatings or stainless steel may be required, as specified in the Construction Documents

3. At the request of Building Designer, an SBCA member plate manufacturer shall furnish a certified record that materials comply with steel specifications.

2.02 MANUFACTURING

Trusses shall be manufactured to meet the quality requirements of ANSI/TPI 1 and in accordance with the information provided in the final approved Truss Design Drawings.

3.01 HANDLING, INSTALLING, AND BRACING

A. Trusses shall be handled during manufacturing, delivery and by the Contractor at the job site so as not to be subjected to excessive bending.

B. Trusses shall be unloaded in a manner so as to minimize lateral strain. Trusses shall be protected from damage that might result from on-site activities and environmental conditions. Trusses shall be handled in such a way so as to prevent toppling when banding is removed.

C. Contractor shall be responsible for the handling, installation, and temporary restraint/bracing of the Trusses in a good workmanlike manner and in accordance with the recommendations set forth in SBCA/TPI’s Building Component Safety Information (BCSI): Guide to Good Practice for Handling, Installing, Restraining & Bracing of Metal Plate Connected Wood Trusses.

D. Apparent damage to Trusses, if any, shall be reported to Truss Manufacturer prior to erection.

E. Trusses shall be set and secured level and plumb, and in correct location. Each Truss shall be held in correct alignment until specified permanent restraint and bracing is installed.

F. Cutting and altering of Trusses is not permitted. If any Truss should become broken, damaged, or altered, written concurrence and approval by a Registered Design Professional is required.

G. Concentrated loads shall not be placed on top of Trusses until all specified restraint and bracing has been installed and structural sheathing is permanently nailed in place. Specifically avoid stacking full bundles of construction materials or other concentrated loads on top of Trusses.

H. The Truss Submittal Package and any supplementary information provided by the Truss Manufacturer shall be provided by the Contractor to the individual or organization responsible for the installation of the Trusses.

I. Trusses shall be permanently restrained and braced in a manner consistent with good Building practices as outlined in BCSI and in accordance with the requirements of the Construction Documents. Trusses shall furthermore be anchored or restrained to prevent out-of-plane movement so as to keep all Truss members from simultaneously buckling together in the same direction. Such permanent lateral restraint shall be accomplished by: (a) anchorage to solid end walls; (b) permanent diagonal bracing in the plane of the web members; or (c) other suitable means.

J. Materials used in temporary and permanent restraint and bracing shall be furnished by Contractor.