《Construction Building Envelope and Interior Finishes Databook：Fireproofing.pdf》由会员分享，可在线阅读，更多相关《Construction Building Envelope and Interior Finishes Databook：Fireproofing.pdf（26页珍藏版）》请在三一文库上搜索。
1、Construction Building Envelope and Interior Finishes Databook Sidney M. Levy McGraw-Hill New York San Francisco Washington, D.C. Auckland Bogot Caracas Lisbon London Madrid Mexico City Milan Montreal New Delhi San Juan Singapore Sydney Tokyo Toronto 481 Section Fireproofi ng Contents 7 7.0.0 Firepro
2、ofi ng or fi re resisting? 7.1.0 Four accepted methods to fi reproof steel 7.1.1Spray-on or trowel-on “dry” or “wet” systems 7.2.0 Fireproofi ng terminology 7.3.0 Typical spray fi reproofi ng specifi ca- tions 7.4.0 Spray fi reproofi ng guide for dry mix applications 7.5.0 UL/ULC fi re-resistance ra
3、tings chart (dry and wet mixes) 7.6.0Standard physical-performance prop- erties for spray-applied materials 7.7.0 Column fi reproofi ng utilizing gyp- sum drywall (two- and three-hour ratings) 7.8.0 Two-hour fi re-rated drywall column enclosure (UL Design X518) 7.9.0Two three-hour drywall column en-
4、 closure design (UL Design X518, X515) 7.10.0Three-hour drywall column enclo- sure at precast concrete panel (UL Design U904) 7.11.0Three-hour drywall column enclo- sure at 12“ block wall corner (UL Design X515) 7.12.0Three-hour concrete column enclo- sure (traffi c area) 7.13.0Three-hour masonry co
5、lumn enclo- sure 7.14.0Fire resistant materials and con- struction per the Uniform Building Code 7.15.0Finishes on interior surfaces per Uniform Building Code 7.16.0 Flame spread classifi cations 7.17.0 Maximum fl ame spread classifi ca- tions 7.18.0Firestopping through-penetrations 7.0.0 Fireproofi
6、 ng or Fire Resisting? Fireproofi ng, in many cases, might better be referred to as fi re resistance because the materials ap- plied, mainly to structural steel systems, are meant to protect these systems from collapsing when exposed to the presence of fi re for specifi c periods of time (one, two,
7、three, or four hours). In other cases, the term fi re retardant is more applicable, particularly when applied to fl ammable or com- bustible materials, like wood. In this case, fi re retardancy provides a limit to the fl ame spread, fuel contribution, and smoke development that would have occurred i
8、f the combustible surface had not been treated with a fi re-resistive coating. 7.1.0 Four Accepted Methods to Fireproof Steel 1. Spray or trowel on materials of a cementitious or mineral-fi ber nature. 2. Concrete encase structural steel columns or beams, or increase the thickness of concrete- suspe
9、nded slabs on metal deck. 3. Apply specifi c numbers of layers of gypsum drywall onto the structural steel members. 4. Spray, brush, or roll on a water- or solvent-based intumescent material or mastic. 7.1.1 Spray-on or Trowel-On “Dry” or “Wet” Systems Spray- or trowel-on “dry” or “wet” cementitious
10、 or mineral-fi ber materials are the most prevalent forms of structural-steel fi reproofi ng and are generally divided into two groupings (Type I and Type II). Type IA factory-mixed cementitious materials with a minimum density of 15/14 pounds per cu- bic foot (240 kg/cubic meter). Type II A factory
11、-mixed, asbestos-free, mineral-fi ber material with inorganic binders, having a minimum applied dry density of 15 pounds per cubic foot (240 kg/cubic meter). If this system is used, it is generally followed by a water overspray to press any loose fi bers and allow the binders to migrate and product
12、a fi rm surface. 7.2.0 Fireproofi ng Terminology Air erosion Resistance of spray fi reproofi ng to dusting, fl aking, sifting, and delamination be- cause of air movement across its surface. ASTM E-859-82/GSA sets the performance quality for air erosion; it is to be 0.025 gm/ft2maximum. Bond strength
13、 The ability of the spray fi reproofi ng to resist pulling away from the steel sub- strate. The higher the bond strength, the lower the chance for cohesive or adhesive failure. ASMT E-736-80 refers to bond strength and sets 200 lbs/ft2as the minimum bond strength. DamageabilityThe resistance to phys
14、ical abuse from abrasion, impact penetration, and com- pression. Two tests conducted by the City of San Francisco developed two standards and one test by ASTM provides the third: Impact penetrationSix cubic centimeters maximum (City of San Francisco). Abrasion resistance22 cubic centimeters maximum
15、(City of San Francisco). Compression500 pounds per square foot minimum (ASTM E-761-80). Dry mixIt has no requirement to pre-mix with water or other additives. It can be applied in its original state by air under pressure. Water is introduced at the spray nozzle prior to application. The dry mix is q
16、uick and easy to apply. Wet mixThe product is mixed with water to provide a slurry that is applied under high pressure through a nozzle. Although it is frequently referred to as cementitious, many manufacturers products do not contain cement. This type of application provides cost-effective, fi re-r
17、esistant per- formance per unit thickness. 482Section 7 7.3.0 Typical Spray Fireproofi ng Specifi cations Fireproofi ng483 7.4.0 Spray Fireproofi ng Guide for Dry Mix Applications 484Section 7 (By permission of Isolatex International, Stanhope, New Jersey.) 7.4.0 Spray Fireproofi ng Guide for Dry Mi
18、x ApplicationsContinued Fireproofi ng485 (By permission of Isolatex International, Stanhope, New Jersey.) 7.5.0 UL/ULC Fire-Resistance Ratings Chart (Dry and Wet Mixes) 486Section 7 (By permission of Isolatex International, Stanhope, New Jersey.) 7.6.0 Standard Physical-Performance Properties for Sp
19、ray-Applied Materials Fireproofi ng487 (By permission of Isolatex International, Stanhope, New Jersey.) 7.7.0 Column Fireproofi ng Utilizing Gypsum Drywall (Two- and Three-Hour Ratings) 488Section 7 (By permission from United States Gypsum Corp., Chicago, Illinois.) 7.8.0 Two-Hour Fire-Rated Drywall
20、 Column Enclosure (UL Design X518) Fireproofi ng489 7.9.0 Two Three-Hour Drywall Column Enclosure Design (UL Design X518, X515) 490Section 7 7.10.0 Three-Hour Drywall Column Enclosure to Precast Concrete Panel (UL Design U904) Fireproofi ng491 7.11.0 Three-Hour Drywall Column Enclosure at 12“ Block
21、Wall Corner (UL Design X515) 492Section 7 7.12.0 Three-Hour Concrete Column Enclosure (Traffi c Area) Fireproofi ng493 7.13.0 Three-Hour Masonry Column Enclosure 494Section 7 Fireproofi ng495 (Reproduced from the 1997 Edition of the Uniform Building Code, Volumes 1, 2, 3, copyright 1997, with the pe
22、rmission of the publisher, the International Conference of Building Offi cials (ICBO). ICBO assumes no responsibility for the accuracy or the completion of summaries provided therein.) 7.14.0 Fire Resistant Materials and Construction per Uniform Building Code 496Section 7 Continued Fireproofi ng497
23、Continued 498Section 7 Continued Fireproofi ng499 Continued 500Section 7 Continued Fireproofi ng501 Continued 502Section 7 Continued Fireproofi ng503 (Reproduced from the 1997 Edition of the Uniform Building Code, Volumes 1, 2, 3, copyright 1997, with the permission of the publisher, the Internation
24、al Conference of Building Offi cials (ICBO). ICBO assumes no responsibility for the accuracy or the com- pletion of summaries provided therein.) 7.15.0 Interior Finish Criteria 504Section 7 Figure 7.15.0Continued (Reproduced from the 1997 Edition of the Uniform Building Code, Volumes 1, 2, 3, copyri
25、ght 1997, with the permission of the publisher, the International Conference of Building Offi cials (ICBO). ICBO assumes no responsibility for the accuracy or the com- pletion of summaries provided therein.) (Reproduced from the 1997 Edition of the Uniform Building Code, Volumes 1, 2, 3, copyright 1
26、997, with the permission of the publisher, the International Conference of Building Offi cials (ICBO). ICBO assumes no responsibility for the accuracy or the com- pletion of summaries provided therein.) 7.16.0 Flame Spread Classifi cations 7.17.0 Maximum Flame Spread Class Fireproofi ng505 7.18.0 Firestopping Through-Penetrations