SECTION 07255

CEMENTITIOUS FIREPROOFING

PART	GENERAL

SECTION INCLUDES

Cementitious [mineral fiber reinforced] fireproofing, spray applied.

RELATED SECTIONS

Section [______-____________]: Building structural substrate surfaces.

Section 07266 - Cellulose Fireproofing.

Section 07270 - Firestopping.

Section 09260 - Gypsum Board Systems: Gypsum board fireproofing.

Section [______-____________]: Plaster fireproofing.

Section [______-____________]: Intumescent coatings.

REFERENCES

ASTM E72 - Method For Conducting Strength Tests of Panels for Building Construction.

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

ASTM E119 - Method For Fire Tests of Building Construction and Materials.

ASTM E605 - Test Methods For Thickness and Density of Sprayed Fire-Resistive Material Applied to Structural Members.

ASTM E736 - Test Method For Cohesion/Adhesion of Sprayed Fire-Resistive Materials Applied to Structural Members.

ASTM E761 - Compressive Strength of Sprayed Fire-Resistive Material Applied to Structural Members.

UL (Underwriters Laboratories, Inc.) - Fire Hazard Classifications.

PERFORMANCE REQUIREMENTS

Cementitious Fireproofing System: Provide a fire rated assembly rating of [____] hours for [roof] [________] and [____] hours for [typical floor] [________] assembly to UL Assembly No. [____].

SUBMITTALS

Submit under provisions of Section [01300.] [________.]

Product Data: Provide data indicating product characteristics, performance and limitation criteria and [________].

Test Reports: Indicating the following:

Bond Strength of Fireproofing: ASTM E72, tested to provide minimum bond strength twenty times weight of fireproofing materials.

Fire test reports of fireproofing application to substrate materials similar to project conditions.

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

Manufacturer's Installation Instructions: Indicate special procedures, perimeter conditions requiring special attention, and [________].

Manufacturer's Certificate: Certify that [Products] [________] meet or exceed [specified requirements.] [________.]

Manufacturer's Field Reports: Submit under provisions of Section [01400.] [________.]

Manufacturer's Field Reports: Indicate environmental conditions under which fireproofing materials were installed.

QUALIFICATIONS

Manufacturer: Company specializing in manufacturing the products specified in this section with minimum [three] [____] years [documented] experience.

Applicator: Company specializing in applying the work of this section [with minimum [____] years [documented] experience.] [approved by manufacturer.]

REGULATORY REQUIREMENTS

Conform to [applicable] [________] code for [fire resistance ratings.] [________.]

Provide certificate of compliance for fireproofing materials to [authority having jurisdiction] [________] indicating approval for use on this project.

MOCKUP

Provide mockup of applied cementitious fireproofing under provisions of Section [01400.] [________.]

Construct mockup, [[____] feet ([____] m) long by [____] feet ([____] m) wide.] [[100] [____] sq ft ([9] [____] sq m).] Conform to project requirements for fire ratings, [thickness,] density of application, and [________].

Locate [where directed.] [________.]

Examine installation within one hour of application to determine variance due to shrinkage, temperature, and humidity.

Where shrinkage and cracking are evident, adjust mixture and method of application as necessary. Remove materials and re-construct mockup.

Mockup may [not] remain as part of the Work.

PRE-INSTALLATION CONFERENCE

Convene [one] [_____] week prior to commencing work of this section, under provisions of Section [01039.] [________.]

ENVIRONMENTAL REQUIREMENTS

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

Provide ventilation in areas to receive fireproofing during and 24 hours after application, to dry material.

Provide temporary enclosure to prevent spray from contaminating air.

SEQUENCING

Sequence work under the provisions of Section [01005] [________].

Sequence work in conjunction with placement of [ceiling hanger tabs,] [mechanical component hangers,] [electrical components,] [and] [________].

WARRANTY

Provide [five] [____] year warranty under provisions of Section [01700.] [________.]

Warranty: Include coverage for fireproofing to remain free from cracking, checking, dusting, flaking, spalling, separation, and blistering. Reinstall or repair failures.

PART	PRODUCTS

MANUFACTURERS

[__________________________________] Product [_________].

[__________________________________] Product [_________].

[__________________________________] Product [_________].

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

MATERIALS

Cementitious Spray Fireproofing: Factory mixed, cementitious material blended for uniform texture; non-fibrous materials; conforming to following requirements:

Bond Strength: ASTM E736, [300] [____] psi ([2 070] [____] Kpa) when set and dry.

Bond Impact: ASTM E72, no cracking, flaking or delamination.

Dry Density: ASTM E605, minimum average density of [17] [____] lb/cu ft ([290] [____] kg/cu m), with minimum individual density of any test sample of [15] [____] lb/cu ft ([240] [____] kg/cu m).

Compressive Strength: ASTM E761, minimum [70] [____] psi ([480] [____] Kpa).

Surface Burning Characteristics: ASTM E84.

Fiber Reinforcement: Mineral, inorganic, [________] type.

Primer [Adhesive] [Coating]: Of type recommended by fireproofing manufacturer.

[Overcoat] [Sealer]: [________].

Metal Lath: Expanded metal lath; [3.4] [____] lb/sq ft ([15] [____] kg/sq m), [galvanized] [rust inhibitive primer] finish.

Water: Clean, potable.

PART	EXECUTION

EXAMINATION

Verify that surfaces are ready to receive work.

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

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

Verify that voids and cracks in substrate are filled, and projections are removed where fireproofing is exposed to view as a finish material.

PREPARATION

Clean substrate of dirt, dust, grease, oil, loose material, or other matter which may effect bond of fireproofing.

Remove incompatible materials which affect bond by scraping, brushing, scrubbing, or sandblasting.

PROTECTION

Protect surfaces not scheduled for fireproofing and equipment from damage by overspray, fall-out, and dusting.

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

APPLICATION

Install metal lath over structural members [and as indicated on [shop drawings.] [Drawings.]

Apply [primer [adhesive] [coating],] fireproofing [and [overcoat] [sealer]] in accordance with manufacturer's instructions.

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

Apply [overcoat] [sealer] [to a thickness of [____] inches ([____] mm).] [at a rate of [____] gal/sq ft ([____] l/sq m).]

FIELD QUALITY CONTROL

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

Inspect the installed fireproofing after application and curing for integrity of fire protection, prior to concealment of Work.

Re-inspect the installed fireproofing for integrity of fire protection, after installation of subsequent Work.

CLEANING

Clean work under provisions of [01700.] [________.]

Remove excess material, overspray, droppings, and debris.

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

SCHEDULE

Location	Components	UL RatingUL Ass'y #

Penthouse	Framing and underside	2 hours	D999

of metal deck

Main Roof	Underside of framing	1 hour	G111

and metal deck

Boiler Room	All framing above	2 hours	E222

12 feet above floor

END OF SECTION