Project manual

PART 3 - EXECUTION

3.1 INSTALLATION A. General:

1. Install flashing and sheet metal items as shown in Sheet Metal and Air Conditioning Contractors National Association, Inc., publication, ARCHITECTURAL SHEET METAL MANUAL, except as otherwise shown or specified.

^{2. Apply Sealant as specified in Section 07 92 00, JOINT SEALANTS.}

3. Apply sheet metal and other flashing material to surfaces which are smooth, sound, clean, dry and free from defects that might affect the application.

4. Remove projections which would puncture the materials and fill holes and depressions with material compatible with the substrate. Cover holes or cracks in wood wider than 6 mm (1/4 inch) with sheet metal compatible with the roofing and flashing material used.

5. Coordinate with masonry work for the application of a skim coat of mortar to surfaces of unit masonry to receive flashing material before the application of flashing.

6. Apply a layer of 7 Kg (15 pound) saturated felt followed by a layer of rosin paper to wood surfaces to be covered with copper. Lap each ply 50 mm (2 inch) with the slope and nail with large headed copper nails.

^{7. Confine direct nailing of sheet metal to strips 300 mm (12 inch) or}

less wide. Nail flashing along one edge only. Space nail not over

100 mm (4 inches) on center unless specified otherwise.

8. Install bolts, rivets, and screws where indicated, specified, or required in accordance with the SMACNA Sheet Metal Manual. Space rivets at 75 mm (3 inch) on centers in two rows in a staggered position. Use neoprene washers under fastener heads when fastener head is exposed.

9. Coordinate with roofing work for the installation of metal base flashings and other metal items having roof flanges for anchorage and watertight installation.

10. Nail continuous cleats on 75 mm (3 inch) on centers in two rows in a staggered position.

11. Nail individual cleats with two nails and bend end tab over nail heads. Lock other end of cleat into hemmed edge.

12. Install flashings in conjunction with other trades so that flashings are inserted in other materials and joined together to provide a water tight installation.

^{13. Where required to prevent galvanic action between dissimilar metal}

isolate the contact areas of dissimilar metal with sheet lead, waterproof building paper, or a coat of bituminous paint.

14. Isolate aluminum in contact with dissimilar metals others than stainless steel, white bronze or other metal compatible with aluminum by:
a. Paint dissimilar metal with a prime coat of zinc-chromate or other suitable primer, followed by two coats of aluminum paint.

b. Paint dissimilar metal with a coat of bituminous paint. c. Apply an approved caulking material between aluminum and

^{dissimilar metal.}
15. Paint aluminum in contact with or built into mortar, concrete, plaster, or other masonry materials with a coat of bituminous paint.

16. Paint aluminum in contact with absorptive materials that may become repeatedly wet with two coats of bituminous paint or two coats of aluminum paint.

17. Bitumen Stops:
a. Install bitumen stops for built-up roof opening penetrations through deck and at formed sheet metal gravel stops.

b. Nail leg of bitumen stop at 300 mm (12 inch) intervals to

^{nailing strip at roof edge before roofing material is installed.}

3.2 THROUGH-WALL FLASHING A. General:

1. Install continuous through-wall flashing between top of concrete foundation walls and bottom of masonry building walls; at top of concrete floors; under masonry, concrete, or stone copings and elsewhere as shown.

2. Where exposed portions are used as a counterflashings, lap base flashings at least 100 mm (4 inches)and use thickness of metal as specified for exposed locations.

^{3. Exposed edge of flashing may be formed as a receiver for two piece}

counter flashing as specified.

4. Terminate exterior edge beyond face of wall approximately 6 mm (1/4 inch) with drip edge where not part of counter flashing.

5. Turn back edge up 6 mm (1/4 inch) unless noted otherwise where flashing terminates in mortar joint or hollow masonry unit joint.

6. Terminate interior raised edge in masonry backup unit approximately

38 mm (1-1/2 inch) into unit unless shown otherwise.

7. Under copings terminate both edges beyond face of wall approximately

6 mm (1/4 inch) with drip edge.

^{8. Lap end joints at least two corrugations, but not less than 100 mm}

(4 inches). Seal laps with sealant.

9. Where dowels, reinforcing bars and fastening devices penetrate flashing, seal penetration with sealing compound. Sealing compound
is specified in Section 07 92 00, JOINT SEALANTS.

10. Coordinate with other work to set in a bed of mortar above and below flashing so that total thickness of the two layers of mortar and flashing are same as regular mortar joint.

11. Where ends of flashing terminate turn ends up 25 mm (1 inch) and fold corners to form dam extending to wall face in vertical mortar or veneer joint.

12. Turn flashing up not less than 200 mm (8 inch) between masonry or behind exterior veneer.

13. When flashing terminates in reglet extend flashing full depth into reglet and secure with lead or plastic wedges spaced 150 mm (6 inch) on center.

14. Continue flashing around columns:

a. Where flashing cannot be inserted in column reglet hold flashing vertical leg against column.

^{b. Counterflash top edge with 75 mm (3 inch) wide strip of}

saturated cotton unless shown otherwise. Secure cotton strip with roof cement to column. Lap base flashing with cotton strip

38 mm (1 1/2 inch).
B. Flashing at Top of Concrete Foundation Walls Where concrete is exposed.

^{Turn up not less than 200 mm (8 inch) high and into masonry backup mortar}

joint or reglet in concrete backup as specified.

C. Flashing at Cavity Wall Construction: Where flashing occurs in cavity walls turn vertical portion up against backup under waterproofing, if

any, into mortar joint. Turn up over insulation, if any, and horizontally through insulation into mortar joint.

D. Flashing at Veneer Walls:
1. Install near line of finish floors over shelf angles or where shown.

2. Turn up against sheathing.

3. At stud framing, hem top edge 19 mm (3/4 inch) and secure to each stud with stainless steel fasteners through sheathing.

4. At concrete backing, extend flashing into reglet as specified.

5. Coordinate with installation of waterproofing or asphalt felt for lap over top of flashing.
E. Lintel Flashing when not part of shelf angle flashing:
1. Install flashing full length of lintel to nearest vertical joint in masonry over veneer.

2. Turn ends up 25 mm (1 inch) and fold corners to form dam and extend end to face of wall.

3. Turn back edge up to top of lintel; terminate back edge as specified for back-up wall.
F. Window Sill Flashing:
1. Install flashing to extend not less than 100 mm (4 inch) beyond ends of sill into vertical joint of masonry or veneer.

2. Turn back edge up to terminate under window frame.

^{3. Turn ends up 25 mm (1 inch) and fold corners to form dam and extend}

to face of wall.

G. Door Sill Flashing:
1. Install flashing under bottom of plate sills of doors over curbs opening onto roofs. Extend flashing out to form counter flashing or receiver for counter flashing over base flashing. Set in sealant.

2. Extend sill flashing 200 mm (8 inch) beyond jamb opening. Turn ends up one inch in vertical masonry joint, extend end to face of wall. Join to counter flashing for water tight joint.

3. Where doors thresholds cover over waterproof membranes install sill flashing over waterproof membrane under thresholds. Extend beyond opening to cover exposed portion of waterproof membrane and not less than 150 mm (6 inch) beyond door jamb opening at ends. Turn up approximately 6 mm (1/4 inch) under threshold.
H. Flashing at Masonry, Stone, or Precast Concrete Copings:
1. Install flashing with drips on both wall faces unless shown otherwise.

^{2. Form penetration openings to fit tight against dowel or other item}

with edge turned up. Seal penetrations with sealant.

3.3 BASE FLASHING
A. Install where roof membrane type base flashing is not used and where shown.
1. Install flashing at intersections of roofs with vertical surfaces or at penetrations through roofs, to provide watertight construction.

2. Install metal flashings and accessories having flanges extending out on top of the built-up roofing before final bituminous coat and roof aggregate is applied.

^{3. Set flanges in heavy trowel coat of roof cement and nail through}

flanges into wood nailers over bituminous roofing.

4. Secure flange by nailing through roofing into wood blocking with nails spaced 75 mm (3 inch) on centers or, when flange over 100 mm (4 inch) wide terminate in a 13 mm (1/2 inch) folded edge anchored with cleats spaced 200 mm (8 inch) on center. Secure one end of cleat over nail heads. Lock other end into the seam.
B. For long runs of base flashings install in lengths of not less than 2400 mm (8 feet) nor more than 3000 mm (10 feet). Install a 75 mm (3 inch) wide slip type, loose lock expansion joint filled with sealant in joints of base flashing sections over 2400 mm (8 feet) in length. Lock and solder corner joints at corners.
C. Extend base flashing up under counter flashing of roof specialties and accessories or equipment not less than 75 mm (3 inch).

3.4 COPINGS A. General:

1. On walls topped with a wood plank, install a continuous edge strip on the front[ and rear] edge of the plank. Lock the coping to the
edge strip with a 19 mm (3/4 inch) loose lock seam.

2. Where shown turn down roof side of coping and extend down over base flashing as specified for counter-flashing. Secure counter-flashing to lock strip in coping at continuous cleat.

3. Install ends adjoining existing construction so as to form space for installation of sealants. Sealant is specified in Section 07 92 00, JOINT SEALANTS.
B. Aluminum Coping:
1. Install with 6 mm (1/4 inch) joint between ends of coping sections.

2. Install joint covers, centered at each joint, and securely lock in place.

3.5 EXPANSION JOINT COVERS, INSULATED
A. Install insulated expansion joint covers at locations shown on curbs not less than 200 mm (8 inch) high above roof surface.
B. Install continuous edge strips of same metal as expansion joint flange, nailed at not less than 75 mm (3 inch) centers.
C. Install insulated expansion joint covers in accordance with manufacturer's directions locking edges to edge strips.

- - - E N D - - -

SECTION 07 81 00 - APPLIED FIREPROOFING

PART 1 - GENERAL

1.1 DESCRIPTION

A. This section specifies mineral fiber and cementitious coverings to provide fire resistance to interior structural steel members shown.

1.2 SUBMITTALS

A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES.
B. Manufacturer's Literature and Data:
1. Manufacturer's complete and detailed application instructions and specifications.

2. Manufacturer's repair and patching instructions. C. Certificates:

1. Certificate from testing laboratory attesting fireproofing material and application method meet the specified fire ratings.
a. List thickness and density of material required to meet fire ratings.

b. Accompanied by complete test report and test record.

2. Manufacturer's certificate indicating sprayed-on fireproofing material supplied under the Contract is same within manufacturing tolerance as fireproofing material tested.
D. Miscellaneous:
1. Manufacturer's written approval of surfaces to receive sprayed-on fireproofing.

^{2. Manufacturer's written approval of completed installation.}

3. Manufacturer's written approval of the applicators of fireproofing material.

1.3 PRODUCT DELIVERY, STORAGE AND HANDLING
A. Deliver to jobsite in sealed containers marked and labeled to show manufacturer's name and brand and certification of compliance with the specified requirements.
B. Remove damaged containers from the site.
C. Store the materials off the ground, under cover, away from damp surfaces.
D. Keep dry until ready for use.
E. Remove materials that have been exposed to water before installation from the site.

1.4 QUALITY CONTROL

A. Test for fire endurance in accordance with ASTM E119, for fire rating specified, in a nationally recognized laboratory.
B. Manufacturer's inspection and approval of surfaces to receive fireproofing as specified under paragraph Examination.
C. Manufacturer's approval of fireproofing applications. D. Manufacturer's approval of completed installation.

^{E. Manufacturer's representative shall observe and advise at the}

commencement of application, and shall visit the site as required thereafter for the purpose of ascertaining proper application.

F. Pre-Application Test Area.
1. Apply a test area consisting of a typical overhead fireproofing installation, including not less than 4.5 m (15 feet) of beam and deck.
a. Apply to one column.

b. Apply for the hourly ratings used.

2. Install in location selected by the Contracting Officer’s Representative (COR), for approval by the representative of the fireproofing material manufacturer and by the Government.

3. Perform Bond test on painted steel in accordance with ASTM E736.

4. Do not proceed in other areas until installation of test area has been completed and approved.

^{5. Keep approved installation area open for observation as criteria for}

sprayed-on fireproofing.

1.5 APPLICABLE PUBLICATIONS
A. Publications listed below form a part of this specification to the extent referenced. Publications are referenced in the text by the basic designation only.
B. American Society for Testing and Materials (ASTM):

1.	C841-03	Installation of Interior Lathing and Furring
^2.	^C847-06	^Metal Lath
^3.	^E84-08	^Surface Burning Characteristics of Building
	^Materials
^4.	^E119-08	^Fire Tests of Building Construction and Materials
^5.	^E605-93 (R2006)	^Thickness and Density of Sprayed Fire-Resistive

Materials Applied to Structural Members

6. E736-00 Cohesion/Adhesion of Sprayed Fire-Resistive

Materials Applied to Structural Members

7. E759-92 (R2005) The Effect of Deflection on Sprayed Fire-Resistive

Material Applied to Structural Members

^{8. E760-92 (R2005) Impact on Bonding of Sprayed Fire-Resistive}

Material Applied to Structural Members

9. E761-92 (R2005) Compressive Strength of Fire-Resistive Material

Applied to Structural Members

10. E859-93 (R2006) Air Erosion of Sprayed Fire-Resistive Materials

^{Applied to Structural Members}

11. E937-93 (R2005) Corrosion of Steel by Sprayed Fire-Resistive

Material Applied to Structural Members

12. E1042-02 Acoustically, Absorptive Materials Applied by

Trowel or Spray.

^{13. G21-96 (R2002) Determining Resistance of Synthetic Polymeric}

Materials to Fungi

C. Underwriters Laboratories, Inc. (UL):
1. Fire Resistance Directory Latest Edition including Supplements
D. Warnock Hersey (WH):
1. Certification Listings Latest Edition
E. Factory Mutual System (FM):
1. Approval Guide Latest Edition including Supplements

PART 2 - PRODUCTS

2.1 SPRAYED-ON FIREPROOFING

A. ASTM E1042, Class (a), Category A.
1. Type I, factory mixed cementitious materials with approved aggregate.

2. Type II, factory mixed mineral fiber with integral inorganic binders minimum 240 kg/m³ (15 1b/ft³) density per ASTM E605 test unless specified otherwise. Use in areas that are completely encased.

B. Materials containing asbestos are not permitted.
C. Fireproofing characteristics when applied in the thickness and density required to achieve the fire-rating specified.

	^Characteristic	^Test	^Results
^1.	^Deflection	^ASTM E759	^No cracking, spalling, or delamination when backing to which it is applied has a deflection up to 1/120 in 3 m (10 ft.)
^2.	^Corrosion-Resistance	^ASTM E937	^No promotion of corrosion of

			^steel.
3.	Bond Impact	ASTM E760	No cracking, spalling, or delamination.
4.	Cohesion/Adhesion (Bond Strength)	ASTM E736	Minimum cohesive/adhesive strength of 9.57 kPa (200 lbf/ft^2) for protected areas. ^19.15 kPa (400 lbf/ft^2^)^for ^exposed areas.
5.	Air Erosion	ASTM E859	Maximum gain weight of the collecting filter 0.27gm/m^2(0.025 gm/ft^2).
6.	Compressive Strength	ASTM E761	Minimum compressive strength 36 kPa (5 lbf/in^2).
7.	Surface Burning Characteristics with adhesive and sealer to be used	ASTM E84	Flame spread 25 or less smoke developed 50 or less

D. Bonding adhesive for Type II (fibrous) materials as recommended and supplied by the fireproofing material manufacturer.

E. Adhesive may be an integral part of the material or applied separately to surface receiving fireproofing material.

2.2 SEALER

A. Sealer for Type II (fibrous) material as recommended and supplied by the fireproofing material manufacturer.
B. Surface burning characteristics as specified for fireproofing material. C. Fungus resistant.
2.3 WATER
A. Clean, fresh, and free from organic and mineral impurities. B. pH of 6.9 to 7.1.
PART 3 - EXECUTION

3.1 EXAMINATION

A. Verify surfaces to receive fireproofing are clean and free of dust, soot, oil, grease, water soluble materials or any foreign substance which would prevent adhesion of the fireproofing material.
B. Verify hangers, inserts and clips are installed before the application of fireproofing material.
C. Verify ductwork, piping, and other obstructing material and equipment is
not installed that will interfere with fireproofing installation.
D. Verify temperature and enclosure conditions are required by fireproofing material manufacturer.

3.2 APPLICATION

A. Do not start application until written approval has been obtained from manufacturer of fireproofing materials that surfaces have been inspected by the manufacturer or his representative, and are suitable to receive sprayed-on fireproofing.
B. Coordinate application of fireproofing material with other trades. C. Mix and apply in accordance with manufacturer's instructions.

^{1. Mechanically control material and water ratios.}

2. Apply adhesive and sealer, when not an integral part of the materials, in accordance with the manufacturer's instructions.

3. Apply to density and thickness indicated in UL Fire Resistance Directory, FM Approval Guide, or WH Certification Listings unless specified otherwise. Test in accordance with ASTM E119.

4. Minimum applied dry density per cubic meter (cubic foot) for the underside of the walk on deck (interstitial) hung purl in or beam and steel deck, columns in interstitial spaces and mechanical equipment rooms shall be as follows:

a. Type II - 350 kg/m³ (22 lb/ft³).
D. Application shall be completed in one area, inspected and approved by Contracting Officer’s Representative (COR) before removal of application equipment and proceeding with further work.

3.3 FIELD TESTS

A. Tests of applied material will be performed by VA retained Testing

Laboratory. See Section 01 45 29, TESTING LABORATORY SERVICES.

B. Contracting Officer’s Representative (COR) will select area to be tested in specific bays on each floor using a geometric grid pattern.
C. Test for thickness and density in accordance with ASTM E605. Areas showing thickness less than that required as a result of fire endurance test will be rejected.
D. Areas showing less than required fireproofing characteristics will be rejected on the following field tests.
1. Test for cohesion/adhesion: ASTM E736.

^{2. Test for bond impact strength: ASTM E760.}
3.4 PATCHING AND REPAIRING
A. Inspect after mechanical, electrical and other trades have completed work in contact with fireproofing material, but before sprayed material is covered by subsequent construction.
B. Perform corrective measures in accordance with fireproofing material

^{Manufacturer's recommendations.}
1. Respray areas requiring additional fireproofing material to provide the required thickness, and replace dislodged or removed material.

2. Spray material for patching by machine directly on point to be patched, or into a container and then hand apply.

^{3. Hand mixing of material is not permitted.}
C. Repair:
1. Respray all test and rejected areas.

2. Patch fireproofing material which is removed or disturbed after approval.

D. Perform final inspection of sprayed areas after patching and repair.

3.5 SCHEDULE

A. Apply fireproofing material in interior structural steel members and on underside of interior roof decks, except on following surfaces:
1. Steel to be encased in concrete, concrete filled columns or designated to receive other type of fireproofing.
B. Type II:
1. One hour fire rating.

- - - E N D - - -

SECTION 07 84 00 - FIRESTOPPING