Amendment 003.pdf

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

1. CONTRACT ID CODE

5. PROJECT NO. (If applicable)2. AMENDMENT/MODIFICATION NO. 3. EFFECTIVE DATE 4. REQUISITION/PURCHASE REQ.NO.

PAGE OF PAGES

6. ISSUED BY CODE 7. ADMINISTERED BY (If other than Item 6)

8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State and ZIP Code)

CODE

9A. AMENDMENT OF SOLICITATION NO.

9B. DATED (SEE ITEM 11)

10A. MODIFICATION OF CONTRACT/ORDER NO.

10B. DATED (SEE ITEM 13)

CODE FACILITY CODE

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers

Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended , by one of the following methods: (a) By completing

Items 8 and 15, and returning is extended, is not extended.

12. ACCOUNTING AND APPROPRIATION DATA (If required.)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS. IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

(x) A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE CONTRACT

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO THE AUTHORITY OF:

D. OTHER (Specify type of modification and authority) appropriation date, etc.) SET FORTH IN ITEM 14.

E. IMPORTANT: Contractor is not, is required to sign this document and return

ORDER NO. IN ITEM 10A.

1 2

0003 06/01/2018

FEDERAL AVIATION ADMINISTRATION

AAQ-500 - REGIONAL ACQUISITIONS

2200 S. 216TH STREET

DES MOINES WA 98198-6547

AAQ530ANM-AFN

x

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

separate letter or telegram which includes a reference to the solicitation and amendment number. FAILURE OF YOUR ACKNOWLEDGEMENT TO BE RECEIVED AT

THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted , such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted ; or (c) By ___________ 1 x x

697DCK-18-R-00313

1 copies to the issuing office.

06/01/2018

(x)

The following is hereby added to the subject RFO:

Due date extension: The Due Date for this RFO is extended to Tuesday July 17, 2018 by 4PM local Seattle time.

Answers to received questions, and addition Specification pages.

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)15A. NAME AND TITLE OF SIGNER (Type or print)

15C. DATE SIGNED 16B. CONTRACT AUTHORITY 15B. CONTRACTOR/OFFEROR 16C. DATE SIGNED

(Signature of person authorized to sign) (Signature of Contracting Officer)

Darren T. Odegard

Except as provided herein, all terms and conditions of the document referenced in Item 9 A or 10A, as heretofore changed, remains unchanged and in full force and effect .

1.3 A. Base Building:

1. #5. Will the FAA please provide the model # of the Roof Top Anchor system they are requiring?

A -See attached spec sections. I had listed these two sections in the table of contents but missed incorporating them in the final draft. These 2 sections shall clarify any roof hatch and fall protection railing questions.

ATCT:

2. #15. The cat walk area was not accessible during the site visit and looks like a lift is the only way to accomplish the required flashing work listed. Please provide the size and quantity of protrusions that require the listed repairs.

A _ I did take contractors out on the catwalk when they had asked to see it. The areas are qty (4 corner triangle protrusions under the catwalk grating system, each being approx.. 7-12 sq. ft.

areas.

3. #20. Please clarify if the old wall panel system must be removed before new panel installation.

A -The existing tower siding metal panel system remains with the new going over the existing.

4. Will the FAA please advise what the existing roof thickness is?

A Base Bldg. has 3.5” isocyanurate insulation with 1 ply pvc durolast membrane which is mechanically attached on a fluted metal deck

Link had no core taken being that the IR scan was free of anomalies. We believe the roof system consists of a metal deck, Insulation and mechanically attached Durolast PVC roof system. Same as the the base building roof system

Tower cab roof has aggregate surfacing, built up roof membrane)4 ply BUR/asphalt, tapered perlite insulation, and steel deck.

Copyright 2012 AIA MasterSpec Professional 02/12

PIPE AND TUBE RAILINGS 055213 - 1

SECTION 055213 - PIPE AND TUBE RAILINGS

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Galvanized Modular Counterweighted Guardrail System by Sector Safety

Guardrail systems.

B. Related Requirements:

1. ALL GUARDRAIL SHALL BE A PART OF AN OSHA COMPLIANT GUARDRAIL

SYSTEM.

2. GUARDRAIL SHALL HAVE A MINIMUM HEIGHT OF 42" ABOVE THE FINISHED

WALKING SURFACE.

3. PIPE RAILINGS SHALL HAVE A MINIMUM NOMINAL DIAMETER OF 1 ½”

4. POST SPACING SHALL NOT EXCEED 8'-0".

5. ANCHORING OF POSTS AND FRAMING OF MEMBERS FOR RAILS SHALL BE

SUCH THAT THE COMPLETED STRUCTURE SHALL BE CAPABLE OF

WITHSTANDING A LOAD OF AT LEAST 200 POUNDS APPLIED IN ANY

DIRECTION AT ANY POINT ON THE TOP RAIL.

6. RAILING COUNTERWEIGHS SHALL HAVE ROOF PADS TO REST UPON

7. RAILING SYSTEMS MUST MEET OSHA REQUIREMENTS

MATERIAL

QUALITY

PIPE

1.2 ACTION SUBMITTALS

A. Product Data: For the following:

1. Galvanized Modular Counterweighted Guardrail “System” by Sector Safety

Guardrail systems.

B. LEED Submittals:

PIPE AND TUBE RAILINGS 055213 - 2

1. Product Data for Credit MR 4: For products having recycled content, documentation indicating percentages by weight of postconsumer and preconsumer recycled content.

Include statement indicating cost for each product having recycled content.

2. Laboratory Test Reports for Credit IEQ 4.2: For primers, documentation indicating that products comply with the testing and product requirements of the California Department of Public Health's (formerly, the California Department of Health Services') "Standard

Method for the Testing and Evaluation of Volatile Organic Chemical Emissions from

Indoor Sources Using Environmental Chambers."

C. Shop Drawings: Include plans, elevations, sections, details, and attachments to other work.

D. Samples: For each type of exposed finish required.

E. Delegated-Design Submittal: For railings, including analysis data signed and sealed by the qualified professional engineer responsible for their preparation.

1.3 INFORMATIONAL SUBMITTALS

A. Product Test Reports: For pipe and tube railings, for tests performed by a qualified testing agency, according to ASTM E 894 and ASTM E 935.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Steel Pipe and Tube Railings:

1. 1. Galvanized Modular Counterweighted Guardrail System (e.g. Sector Safety

Guardrail system)

2.2 PERFORMANCE REQUIREMENTS

A. Delegated Design: Engage a qualified professional engineer, as defined in Section 014000

"Quality Requirements," to design railings, including attachment to building construction.

B. Structural Performance: Railings, including attachment to building construction, shall withstand the effects of gravity loads and the following loads and stresses within limits and under conditions indicated:

1. Handrails and Top Rails of Guards:

a. Uniform load of 50 lbf/ ft. (0.73 kN/m) applied in any direction.

b. Concentrated load of 200 lbf (0.89 kN) applied in any direction.

c. Uniform and concentrated loads need not be assumed to act concurrently.

2. Infill of Guards:

a. Concentrated load of 50 lbf (0.22 kN) applied horizontally on an area of 1 sq. ft.

(0.093 sq. m).

PIPE AND TUBE RAILINGS 055213 - 3

b. Infill load and other loads need not be assumed to act concurrently.

2.3 METALS, GENERAL

A. Brackets, Flanges, and Anchors: Cast or formed metal of same type of material and finish as supported rails unless otherwise indicated.

2.4 STEEL AND IRON

A. Recycled Content of Steel Products: Postconsumer recycled content plus one-half of preconsumer recycled content not less than 25 percent.

B. Pipe: ASTM A 53/A 53M, Type F or Type S, Grade A, Standard Weight (Schedule 40), unless another grade and weight are required by structural loads.

1. Provide galvanized finish.

C. Plates, Shapes, and Bars: ASTM A 36/A 36M.

2.5 FASTENERS

A. General: Provide the following:

1. Hot-Dip Galvanized Railings: hot-dip zinc-coated steel fasteners complying with

ASTM A 153/A 153M or ASTM F 2329 for zinc coating.

2.6 MISCELLANEOUS MATERIALS

A. Welding Rods and Bare Electrodes: Select according to AWS specifications for metal alloy welded.

B. Low-Emitting Materials: Paints and coatings shall comply with the testing and product requirements of the California Department of Public Health's (formerly, the California

Department of Health Services') "Standard Method for the Testing and Evaluation of Volatile

Organic Chemical Emissions from Indoor Sources Using Environmental Chambers."

C. Etching Cleaner for Galvanized Metal: Complying with MPI#25.

D. Galvanizing Repair Paint: High-zinc-dust-content paint complying with SSPC-Paint 20 and compatible with paints specified to be used over it.

E. Universal Shop Primer: Fast-curing, lead- and chromate-free, universal modified-alkyd primer complying with MPI#79 and compatible with topcoat.

F. Epoxy Zinc-Rich Primer: Complying with MPI#20 and compatible with topcoat.

G. Shop Primer for Galvanized Steel: Primer formulated for exterior use over zinc-coated metal and compatible with finish paint systems indicated.

PIPE AND TUBE RAILINGS 055213 - 4

H. Epoxy Intermediate Coat: Complying with MPI #77 and compatible with primer and topcoat.

I. Polyurethane Topcoat: Complying with MPI #72 and compatible with undercoat.

J. Bituminous Paint: Cold-applied asphalt emulsion complying with ASTM D 1187/D 1187M.

K. Nonshrink, Nonmetallic Grout: Factory-packaged, nonstaining, noncorrosive, nongaseous grout complying with ASTM C 1107/C 1107M. Provide grout specifically recommended by manufacturer for interior and exterior applications.

2.7 FABRICATION

A. Cut, drill, and punch metals cleanly and accurately. Remove burrs and ease edges to a radius of approximately 1/32 inch (1 mm) unless otherwise indicated. Remove sharp or rough areas on exposed surfaces.

B. Form work true to line and level with accurate angles and surfaces.

C. Welded Connections: Cope components at connections to provide close fit, or use fittings designed for this purpose. Weld all around at connections, including at fittings.

1. Use materials and methods that minimize distortion and develop strength and corrosion resistance of base metals.

2. Obtain fusion without undercut or overlap.

3. Remove flux immediately.

4. At exposed connections, finish exposed surfaces smooth and blended so no roughness shows after finishing and welded surface matches contours of adjoining surfaces.

D. Welded Connections for Aluminum Pipe: Fabricate railings to interconnect members with concealed internal welds that eliminate surface grinding, using manufacturer's standard system of sleeve and socket fittings.

E. Nonwelded Connections: Connect members with concealed mechanical fasteners and fittings.

Fabricate members and fittings to produce flush, smooth, rigid, hairline joints.

F. Form changes in direction by inserting prefabricated elbow fittings

G. Close exposed ends of railing members with prefabricated end fittings.

H. Provide wall returns at ends of wall-mounted handrails unless otherwise indicated.

I. Brackets, Flanges, Fittings, and Anchors: Provide wall brackets, flanges, miscellaneous fittings, and anchors to interconnect railing members to other work unless otherwise indicated.

1. At brackets and fittings fastened to plaster or gypsum board partitions, provide crush-resistant fillers or other means to transfer loads through wall finishes to structural supports and prevent bracket or fitting rotation and crushing of substrate.

J. Expanded-Metal Infill Panels: Fabricate infill panels from expanded metal made from same metal as railings in which they are installed.

PIPE AND TUBE RAILINGS 055213 - 5

2.8 STEEL AND IRON FINISHES

A. Galvanized Railings:

1. Hot-dip galvanize exterior steel railings, including hardware, after fabrication.

2. Comply with ASTM A 123/A 123M for hot-dip galvanized railings.

3. Comply with ASTM A 153/A 153M for hot-dip galvanized hardware.

B. Preparing Galvanized Railings for Shop Priming: After galvanizing, thoroughly clean railings of grease, dirt, oil, flux, and other foreign matter, and treat with etching cleaner.

C. Preparation for Shop Priming: Prepare uncoated ferrous-metal surfaces to comply with [SSPC-

SP 6/NACE No. 3, "Commercial Blast Cleaning."] [SSPC-SP 3, "Power Tool Cleaning."]

D. Primer Application: Apply shop primer to prepared surfaces of railings unless otherwise indicated. Comply with requirements in SSPC-PA 1, "Shop, Field, and Maintenance Painting of

Steel," for shop painting. Primer need not be applied to surfaces to be embedded in concrete or masonry.

1. Do not apply primer to galvanized surfaces.

E. High-Performance Coating: Apply epoxy intermediate and polyurethane topcoats to prime-coated surfaces. Comply with coating manufacturer's written instructions and with requirements in SSPC-PA 1, "Shop, Field, and Maintenance Painting of Steel," for shop painting. Apply at spreading rates recommended by coating manufacturer.

PART 3 - EXECUTION

3.1 INSTALLATION, GENERAL

A. Set railings accurately in location, alignment, and elevation; measured from established lines and levels and free of rack.

1. Do not weld, cut, or abrade surfaces of railing components that are coated or finished after fabrication and that are intended for field connection by mechanical or other means without further cutting or fitting.

2. Set posts plumb within a tolerance of 1/16 inch in 3 feet (2 mm in 1 m).

3. Align rails so variations from level for horizontal members and variations from parallel with rake of steps and ramps for sloping members do not exceed 1/4 inch in 12 feet (6 mm in 3.5 m).

B. Control of Corrosion: Prevent galvanic action and other forms of corrosion by insulating metals and other materials from direct contact with incompatible materials.

1. Coat, with a heavy coat of bituminous paint, concealed surfaces of aluminum that are in contact with grout, concrete, masonry, wood, or dissimilar metals.

PIPE AND TUBE RAILINGS 055213 - 6

3.2 ANCHORING POSTS

A. Use manufactures recommended counterweight system for the guardrail system.

3.3 ATTACHING RAILINGS

A. Attach railings to railing manufactures counterweight system. The counterweights shall rest upon roof pads supplied with the railing system.

3.4 ADJUSTING AND CLEANING

A. Touchup Painting: Immediately after erection, clean field welds, bolted connections, and abraded areas of shop paint, and paint exposed areas with the same material as used for shop painting to comply with SSPC-PA 1 requirements for touching up shop-painted surfaces.

B. Galvanized Surfaces: Clean field welds, bolted connections, and abraded areas, and repair galvanizing to comply with ASTM A 780/A 780M.

END OF SECTION 055213

EASTERWOOD FIELD AIRPORT Roofing/Waterproofing 01/09/2018

(CLL) Project Specification

ROOF ACCESSORIES 077200 - 1

SECTION 077200 - ROOF ACCESSORIES

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Bilco Thermally Broken Roof Hatches (ATCT cab roof & Base Building hatches)

2. Bil-Guard 2.0 Roof Hatch Railing System (Attached to the 2 new roof hatches)

1.2 ACTION SUBMITTALS

A. Product Data: Bilco Thermally Broken Roof Hatches (ATCT cab roof & Base Building hatches)

B. Bil-Guard 2.0 Roof Hatch Railing System (Attached to the 2 new roof hatches)

C. Retain "Shop Drawings" Paragraph below for work that involves custom fabrication or if manufacturer's Product Data are inadequate.

D. Shop Drawings: For roof accessories.

E. Samples: For each exposed product and for each color and texture specified.

1.3 INFORMATIONAL SUBMITTALS

A. Sample warranties.

1.4 CLOSEOUT SUBMITTALS

A. Operation and maintenance data.

1.5 WARRANTY

A. Special Warranty on Painted Finishes: Manufacturer's standard form in which manufacturer agrees to repair finishes or replace roof accessories that show evidence of deterioration of factory-applied finishes within 20 years from date of Substantial Completion.

PART 2 - PRODUCTS

A. Size: Contractor shall field measure the roughing-in information or Shop Drawings of equipment to be supported.

ROOF ACCESSORIES 077200 - 2

B. Construction:

1. Curb Profile: [Manufacturer's standard] compatible with roofing system.

2. On ribbed or fluted metal roofs, form deck-mounting flange at perimeter bottom to conform to roof profile.

3. Fabricate curbs to minimum height of [12 inches (305 mm)] above roofing surface unless otherwise indicated.

4. Top Surface: Level top of curb, with roof slope accommodated [by sloping deck-mounting flange] [or] [by use of leveler frame].

5. Sloping Roofs: Where roof slope exceeds 1:48, fabricate curb with perimeter curb height tapered to accommodate roof slope so that top surface of perimeter curb is level. Equip unit with water diverter or cricket on side that obstructs water flow.

6. Insulation: Factory insulated with [1-1/2-inch- (38-mm-)] thick glass-fiber board insulation.

7. Liner: Same material as curb, of manufacturer's standard thickness and finish.

8. Nailer: Factory-installed wood nailer [along top flange of curb] [under top flange on side of curb], continuous around curb perimeter.

9. Wind Restraint Straps and Base Flange Attachment: Provide wind restraint straps, welded strap connectors, and base flange attachment to roof structure at perimeter of curb, of size and spacing required to meet wind uplift requirements.

10. Platform Cap: Where portion of roof curb is not covered by equipment, provide weathertight platform cap formed from 3/4-inch (19-mm) thick plywood covered with metal sheet of same type, thickness, and finish as required for curb.

11. Metal Counterflashing: Manufacturer's standard, removable, fabricated of same metal and finish as curb.

12. Security Grille: [Provide for all units] [Provide where indicated].

13. Damper Tray: Provide damper tray or shelf with opening [3 inches (76 mm

2.2 ROOF HATCH

A. Roof Hatches: Bilco Thermally Broken Roof Hatches (ATCT cab roof & Base Building hatches)

B. Metal roof-hatch units with lids and insulated walled curbs, welded or mechanically fastened and sealed corner joints, continuous lid-to-curb counterflashing and weathertight perimeter gasketing, and integrally formed deck-mounting flange at perimeter bottom.

C. Type and Size: Contractor shall field measure the hatch openings prior to submittal and ordering products. Bilco Thermally Broken Roof Hatches, single leaf.

D. Loads: Minimum [40-lbf/sq. ft. (1.9-kPa)] external live load and [20-lbf/sq. ft. (0.95-kPa)] internal uplift load.

1. Dome Glazing: Minimum [40-lbf/sq. ft. (1.9-kPa)] external live load and [20-lbf/sq. ft.

(0.95-kPa)] internal uplift load.

E. Hatch Material: Standard Bilco finish for Thermally broken roof hatch

1. Thickness: [Manufacturer's standard thickness for hatch size indicated]

2. Finish: Mill finish aluminum

ROOF ACCESSORIES 077200 - 3

F. Construction:

1. Insulation: Polyisocyanurate

a. R-Value: 20+ according to manf.

2. Nailer: Factory-supplied continuous around hatch perimeter.

3. Hatch Lid: Opaque, insulated, and double walled, with manufacturer's standard metal liner of same material and finish as outer metal lid.

4. Hatch Lid: Glazed, insulated, and double walled, with manufacturer's standard metal liner of same material and finish as outer metal lid.

5. Curb Liner: Manufacturer's standard, of same material and finish as metal curb.

6. On ribbed or fluted metal roofs, form flange at perimeter bottom to conform to roof profile.

7. Fabricate curbs to minimum height of [12 inches (305 mm)] above roofing surface unless otherwise indicated.

G. Hardware: Spring operators, hold-open arm, [galvanized] [stainless]-steel spring latch with turn handles, [galvanized] [stainless]-steel butt- or pintle-type hinge system, and padlock hasps inside and outside.

1. Provide two-point latch on lids larger than 84 inches (2130 mm).

H. Safety Railing System: “BIL-GUARD 2.0 Roof Hatch Railing Sytsem” Roof-hatch manufacturer's standard system including rails, clamps, fasteners, safety barrier at railing opening, and accessories required for a complete installation; attached to roof hatch and complying with 29 CFR 1910.23 requirements and authorities having jurisdiction.

1. Height: [42 inches (1060 mm)] above finished roof deck.

2. Posts and Rails: Factory Aluminum with powder coat paint finish.

3. Flat Bar: Galvanized steel, 2 inches (50 mm) high by 3/8 inch (9 mm) thick.

4. Maximum Opening Size: System constructed to prevent passage of a sphere 21 inches

(533 mm) in diameter.

5. Self-Latching Gate: Provide manufacturer's standard hinges and self-latching mechanism.

6. Post and Rail Tops and Ends: Weather resistant, closed or plugged with prefabricated end fittings.

7. Provide weep holes or another means to drain entrapped water in hollow sections of handrail and railing members.

8. Fabricate joints exposed to weather to be watertight.

9. Fasteners: Manufacturer's standard, finished to match railing system.

10. Finish: [Manufacturer's standard]

a. Color: yellow

2.3 MISCELLANEOUS MATERIALS

A. General: Provide materials and types of fasteners, protective coatings, sealants, and other miscellaneous items required by manufacturer for a complete installation.

ROOF ACCESSORIES 077200 - 4

B. Acrylic Glazing: ASTM D 4802, thermoformable, monolithic sheet, manufacturer's standard, Type UVA (formulated with UV absorber), Finish 1 (smooth or polished).

C. Polycarbonate Glazing: Thermoformable, monolithic polycarbonate sheets manufactured by extrusion process, burglar-resistance rated according to UL 972 with an average impact strength of [12 to 16 ft-lbf/in. (640 to 854 J/m)] of width when tested according to ASTM D 256, Method A (Izod).

D. Cellulosic-Fiber Board Insulation: ASTM C 208, Type II, Grade 1, thickness as indicated.

E. Glass-Fiber Board Insulation: ASTM C 726, nominal density of 3 lb/cu. ft. (48 kg/cu. m), thermal resistivity of 4.3 deg F x h x sq. ft./Btu x in. at 75 deg F (29.8 K x m/W at 24 deg C), thickness as indicated.

F. Polyisocyanurate Board Insulation: ASTM C 1289, thickness and thermal resistivity as indicated.

G. Wood Nailers: Softwood lumber, pressure treated with waterborne preservatives for aboveground use, acceptable to authorities having jurisdiction,[ containing no arsenic or chromium,] and complying with AWPA C2; not less than 1-1/2 inches (38 mm) thick.

H. Security Grilles: [3/4-inch (19-mm)] diameter, ASTM A 1011/A 1011M steel bars spaced [6 inches (150 mm)] o.c. in one direction and [12 inches (300 mm)] o.c. in the other[, shop-primed for field finish]. Bituminous Coating: Cold-applied asphalt emulsion complying with

ASTM D 1187/D 1187M.

I. Underlayment:

1. Felt: ASTM D 226/D 226M, Type II (No. 30), asphalt-saturated organic felt, nonperforated.

2. Polyethylene Sheet: 6-mil- (0.15-mm-) thick polyethylene sheet complying with

ASTM D 4397.

3. Slip Sheet: Building paper, 3 lb/100 sq. ft. (0.16 kg/sq. m) minimum, rosin sized.

4. Self-Adhering, High-Temperature Sheet: Minimum 30 to 40 mils (0.76 to 1.0 mm) thick, consisting of slip-resisting polyethylene-film top surface laminated to layer of butyl or

SBS-modified asphalt adhesive, with release-paper backing; cold applied. Provide primer when recommended by underlayment manufacturer.

5. Fasteners: Roof accessory manufacturer's recommended fasteners suitable for application and metals being fastened. Match finish of exposed fasteners with finish of material being fastened. Provide nonremovable fastener heads to exterior exposed fasteners. Furnish the following unless otherwise indicated:

J. Gaskets: Manufacturer's standard tubular or fingered design of neoprene, EPDM, PVC, or silicone or a flat design of foam rubber, sponge neoprene, or cork.

K. Elastomeric Sealant: ASTM C 920, elastomeric polymer sealant as recommended by roof accessory manufacturer for installation indicated; low modulus; of type, grade, class, and use classifications required to seal joints and remain watertight.

L. Butyl Sealant: ASTM C 1311, single-component, solvent-release butyl rubber sealant;

polyisobutylene plasticized; heavy bodied for expansion joints with limited movement.

ROOF ACCESSORIES 077200 - 5

M. Asphalt Roofing Cement: ASTM D 4586/D 4586M, asbestos free, of consistency required for application.

PART 3 - EXECUTION

3.1 INSTALLATION

A. General: Verify dimensions of roof openings for roof accessories. Install roof accessories according to manufacturer's written instructions.

1. Install roof accessories level; plumb; true to line and elevation; and without warping, jogs in alignment, buckling, or tool marks.

2. Anchor roof accessories securely in place so they are capable of resisting indicated loads.

3. Use fasteners, separators, sealants, and other miscellaneous items as required to complete installation of roof accessories and fit them to substrates.

4. Install roof accessories to resist exposure to weather without failing, rattling, leaking, or loosening of fasteners and seals.

B. Metal Protection: Protect metals against galvanic action by separating dissimilar metals from contact with each other or with corrosive substrates by painting contact surfaces with bituminous coating or by other permanent separation as recommended by manufacturer.

1. Coat concealed side of [uncoated aluminum] [stainless-steel] roof accessories with bituminous coating where in contact with wood, ferrous metal, or cementitious construction.

2. Underlayment: Where installing roof accessories directly on cementitious or wood substrates, install a course of underlayment and cover with manufacturer's recommended slip sheet.

C. Security Grilles: Weld bar intersections and[, using tamper-resistant bolts, attach the] ends of bars to structural frame or primary curb walls.

D. Seal joints with [elastomeric] [or] [butyl] sealant as required by roof accessory manufacturer.

3.2 REPAIR AND CLEANING

A. Galvanized Surfaces: Clean field welds, bolted connections, and abraded areas and repair galvanizing according to ASTM A 780/A 780M.

B. Touch up factory-primed surfaces with compatible primer ready for field painting according to

Section 099113 "Exterior Painting."

C. Clean exposed surfaces according to manufacturer's written instructions.

D. Replace roof accessories that have been damaged or that cannot be successfully repaired by finish touchup or similar minor repair procedures.

END OF SECTION 077200