SECTION 07253

CELLULOSE FIREPROOFING

PART 1 GENERAL

SECTION INCLUDES

Cellulose fireproofing, spray applied.

Protective [overcoat.] [sealer.]

PRODUCTS INSTALLED BUT NOT FURNISHED UNDER THIS SECTION

Section 09206 - Metal Furring and Lathing: Metal lath over [structural members.] [________.]

RELATED SECTIONS

Section 07218 - Sprayed Cellulose Insulation.

Section 07255 - Cementitious Fireproofing.

Section [____-________]: Intumescent coatings.

REFERENCES

ASTM E84 - Test for Surface Burning Characteristics of Building Materials.

ASTM E119 - Fire Tests of Building Construction and Materials.

ASTM E760 - Effect of Impact on Bonding of Sprayed Fire-Resistive Material Applied to Structural Members.

UL - Fire Hazard Classifications.

PERFORMANCE REQUIREMENTS

Installed materials to conform to UL Assembly No. [____] for a fire resistance rating of [________] hours.

Bond Strength of Fireproofing: ASTM E760, tested to provide minimum bond strength twenty times weight of fireproofing materials.

Application:	Verify fire test reports of fireproofing application to substrate materials similar to project conditions.

Verify reports from independent testing agencies, of product proposed for use, which indicate conformance to ASTM E119 and ASTM E84.

SUBMITTALS

Submit product data under provisions of Section [01300.] [01340.]

Provide product data on specified products.

Submit [two] [________] copies of certified test reports of bond strength and product property tests.

Submit manufacturer's installation instructions under provisions of Section [01300.] [01340.]

Submit manufacturer's certificate under provisions of Section [01400] [01405] that [products] [________] meet or exceed [specified fire resistance rating requirements.] [________________.]

QUALITY ASSURANCE

Manufacturer: Company specializing in fireproofing materials with [three] [________] years experience.

Applicator: Company specializing in fireproofing materials [with [________] years [documented] experience.] [approved by manufacturer.]

REGULATORY REQUIREMENTS

Conform to [applicable] [________] code for [flame/fuel/smoke ratings] [overcoating requirements] [____________] and fire resistance ratings.

MOCKUP

Provide mockup of specified materials under provisions of Section [01400.] [01405.]

Apply materials to representative substrates on site. Conform to requirements for fire ratings and finish texture.

Apply materials to an area of [________] sq ft ([________] sq m).

Comply with project requirements as to thickness, density of application, and fire rating.

Examine installation within one hour of application to determine shrinkage and bond to substrate.

ENVIRONMENTAL REQUIREMENTS

Provide ventilation in areas to receive fireproofing during and 24 hours after application to dry material. Maintain non-toxic, unpolluted working area.

Provide temporary enclosure to prevent spray from contaminating air.

Do not apply spray fireproofing when temperature of substrate material and surrounding air is below 40 degrees F (5 degrees C).

WARRANTY

Provide [five] [____] year [manufacturer's] warranty under provisions of Section [01700.] [01740.]

Warranty: Applied fireproofing to remain free from cracks, checking, dusting, flaking, spalling, separation, and blistering. Reinstall or repair such defects or failures.

PART 2 PRODUCTS

MANUFACTURERS

[________________________________.]

[________________________________.]

[________________________________.]

Substitutions: Under provisions of Section [01600.] [01630.]

MATERIALS

Cellulose Fiber Sprayed Fireproofing: Non-combustible cellulose with integral binder, conforming to the following:

Fire hazard classification

for flame/fuel/smoke	[20/10/0] [___/___/___]

Thermal K (ksi) factor	[0.22] [____] ([0.032] [____])

Density	[2.0] [____] lb/cu ft

([32] [____] kg/cu m)

Primer Adhesive:	Of type recommended by fireproofing manufacturer.

[Overcoat] [and] [Sealer]: Comply with UL requirements and manufacturer's recommendations for specific site conditions.

****** [OR] ******

[Cementitious Overcoat: [________________] type, spray applied; flame/fuel/smoke rating of [____/____/____] in

accordance with ASTM E84; manufactured by [________].]

Metal Lath: Expanded metal lath; galvanized.

Water:	Clean, potable.

PART 3 EXECUTION

EXAMINATION

Verify that substrate surfaces are ready to receive work.

Confirm compatibility of surfaces to receive fireproofing materials.

Verify clips, hangers, supports, sleeves, and other items required to penetrate fireproofing are in place before application.

Verify ducts, piping, equipment, or other items which would interfere with application of fireproofing are not positioned until fireproofing work is completed.

Beginning of installation means acceptance of [existing conditions.] [substrate.]

PREPARATION

Remove incompatible materials which affect bond.

Fill voids and cracks in substrate, remove projections and level where sprayed fireproofing is exposed to view as finish material.

Protect adjacent surfaces and equipment from damage by overspray fall-out, and dusting.

Close off and seal ductwork in areas where fireproofing is being applied.

APPLICATION

Mix and apply fireproofing in accordance with manufacturer's instructions.

[Install metal lath over structural members [and as detailed].]

Apply [primer adhesive and] fireproofing in sufficient thickness to achieve rating with as many passes as necessary to cover with monolithic blanket of uniform density and texture.

Tamp fireproofing after application to provide dense smooth surface.

Apply spray [overcoat] [sealer] on surfaces of fireproofing.

FIELD QUALITY CONTROL

Field inspection [and testing] will be performed under provisions of Section [01400.] [01410.]

Inspections will be performed to verify compliance with requirements.

Correct unacceptable work and provide further inspection to verify compliance with requirements.

CLEANING

Remove excess material, overspray, droppings, and debris.

Remove fireproofing from materials and surfaces not specifically required to be fireproofed.

PROTECTION

Protect applied sprayed fireproofing from damage under provisions of Section [01500.] [01535.]

SCHEDULE

END OF SECTION