The UL 580 test method provides a comparative measure of uplift resistance of roof deck constructions. An air space of 1/2 inch shall be provided at the top, end and sides of the member unless Common Class A roof coverings include asphalt fiberglass composition shingles, concrete and flat/barrel-shaped tiles. Contact a McElroy representative for … 1-800-328-1687. Each month in this column, one of NRCA's technical services staff members will answer readers' technical questions. In fact, if an existing roof deck (the structural surface beneath the roofing system) is in good condition, new asphalt shingles can even be installed over older shingles, reducing the need (and cost) of a tear off of the old roofing. Download the AEP Span Product Selection Guide and Color Design Guide . Foam plastics that are used as part of a Class A, B or C roof covering can be used without a thermal barrier if the assembly passes FM 4450 or UL 1256. Roofing assemblies and roof coverings are rated as Class A, B, and C or may be non-classified, all of which is based on their effectiveness against fire exposures. Class A roof assemblies are those that are effective against severe fire test exposure. Wood fiber, perm rating 3.0-5.0. A roofing contractor should be aware of model building codes' minimum requirements when not using Class A products or roof assemblies. Wet-Felted/G2: Wet–Felted Protectone® – Baroque™, Baroque Customline®, Cashmere®, Directional Fissured, Fine Fissured, Fine Fis sured Class A roof assemblies also include ferrous or copper shingles or sheets, metal sheets and shingles, clay or concrete roof tile or slate installed on noncombustible decks or ferrous, copper or metal sheets installed without a roof deck on noncombustible framing. Most often UL or Gypsum Assoc. The tests were completed successfully, and three new UL listings were issued: HW-D-0488, HW-D-0489 and HW-D-0490. This is how to detail an unvented roof assembly for flat and low slope roofs. The tests undertaken at UL applied to three specific situations with fire-rated wall assemblies and non-rated roof assemblies: (1) the roof purlin is located inside the wall, (2) parallel to the wall and (3) perpendicular to the wall. FireGuard E-84 Intumescent Coating is more cost-effective than other solutions without sacrificing protection (as low as $0.75 per square foot). Meet ASTM E1264 Class A rating; ... roof support structure, and roof assembly including deck, insulation, and roofing system. Class A roof assemblies include those with coverings of brick, masonry and exposed concrete roof deck. The system is also listed with F.M. Ballasted systems are primarily used for large new construction projects, but can also be used on roof replacement or recovery projects where the existing structure can support the additional weight. Our roof systems are rated by code for external fire resistance, under-deck exposure, and time-temperature resistance. floating), the entire assembly has to have a rating. The system is also listed with F.M. conducted for roof assemblies installed over combustible decks. SCROLL DOWN. (Factory Mutual) to meet I-90 wind uplift. CBC 705A / CRC R337.5. Common assembly-rated Class A coverings include: Fire-retardant treated wood shakes (with Class B fire rating, approved by the California Office of the State Fire Marshal as a result of passing the required natural weathering test). provides as a component in roof assemblies. B. It is important to note that a Class 1 rating only applies to the components listed for each layer in an FM Approved RoofNav report. other roof protrustions sothat notiiing obstructs tiieflow ofair from eave to ridge. Roofs and roof edges. FM Approval assemblies are categorized according to deck type and the specific type of construction (new, tear-off or retrofit). The recommended dimensions should be specified from the table below. B. Underwriters Laboratories rated roof assemblies are grouped according to deck type (non-combustible or combustible) and are further categorized by the severity of fire exposure (Class A, B or C). Our laboratory testing apparatus is so accurate and test procedures so rigorous that it is the only roofing material manufacturer's test laboratory … Where a specific construction detail provides for a sec- Roof Insulation — Min 2-1/4 in. Wet-Felted/G2: Wet–Felted Protectone® – Baroque™, Baroque Customline®, Cashmere®, Directional Fissured, Fine Fissured, Fine Fis sured "CLASS B" ROOFING ASSEMBLY. Yes, all metal roofing has a default class A rating. Roof systems are segregated into combustible and non-combustible construction types. deck Roof Deck Construction #457 • FM Class 1 Roof Decks • ASTM E108 Fire Classifi ed Assemblies • ASTM E119 Fire Resistance Rated Roof/Ceiling Assemblies • UL and FM Wind Uplift Rated Assemblies. Exceptions: 2. DensDeck® roof boards are designed to address four persistent challenges inherent in commercial roofing assemblies: fire resistance, moisture absorption, strength and dimensional stability. Code Section (15-12-030) “Use of Combustibles” was revised on May 17, 2000, in conjunction with other code sections to allow the use of Exterior Insulation finishing Systems (EIFS) on … 3. The tendency is to assume that Class A roof systems have a Class A flame spread, and so on, but there is no correlation. This document will help you with the installation of your cedar shake and shingle roofs. Find out how to best install your next synthetic composite polymer roof. There are no specific materials or products that are automatically qualified as Class C roof coverings. One goal of this column will be to increase your understanding of each of these ratings, and what the rating does and does not do for your peace of mind. 1. The hourly rating of the roof assembly shall be equal to or greater than the hourly rating of the wall assembly. This award winning Champions Hall project at the University of Arkansas demonstrates the aesthetic appeal of a 238T wall panel system.. The following conceptual details (Figures 9-1 to 9-6) show some of the typical conditions commonly encountered. Jobsite Storage Many moisture-sensitive roof insulations have specific storage requirements that must be followed at the jobsite. Foam plastics that are used as part of a Class A, B or C roof covering can be used without a thermal barrier if the assembly passes FM 4450 or UL 1256. The test evaluates the roof deck, or the roof deck assembly and its attachment to supports, as well as the attachment of any roof covering. Other organizations, such as the Brick Institute of America, the AISI and CSSBI, have limited information, details and design information. traffic and hail damage resistance. An MBMAbuilding with a fire rated roof assembly places the metal building in a totally new class of construction with the following advantages: 1. Testing is required. To obtain a UL 790 fire classification, roof assemblies are required to pass a series of exterior fire exposure tests – the Class A tests are more severe than the Class B tests, which are more severe than the Class C tests. A Class 1 roof has undergone a series of tests that evaluate the entire roof assembly, including the external spread of flame test utilized for the Class A rating. 2. floor/ceiling assembly below to the underside of the floor or roof sheathing, slab or deck above or to the fire‐resistance‐ rated floor/ceiling or roof/ceiling assembly above, and shall be securely attached thereto. Take a tour of the motorhome manufacturing process at the Best Selling Motorhome Manufacturer in North America, Thor Motor Coach. 1. The overall min base coat thickness shall be sufficient to fully embed the mesh. Class A roof assemblies shall be permitted for use in buildings or structures of all types of construction. In many in-stances, the use of nontreated, construction-grade wood is suitable for use in roof assemblies as blocking or nailers provided reasonable measures are taken to ensure the nontreated wood remains reasonably dry when in service. Good roofing practice dictates proper drainage to prevent possible excessive live load and, in the event of a roof leak, to minimize potential interior damage to the roofing assembly and to the interior of the building. A Class 1 roof has undergone a series of tests that evaluate the entire roof assembly, including the external spread of flame test utilized for the Class A rating. Table 3 is a detailed list of available publications and technical data (primarily in North America). Steep slope roofs have a pitch of ___ or greater. Roof eaves may be either “open” or “enclosed.” Open roof eaves have exposed rafter tails and an unenclosed space on the underside of the roof deck. MINIMUM R-VALUE OF EXTERIOR CI DETERMINED BY TOTAL R-VALUE OF INSULATED ASSEMBLY (SEE ALSO: UNVENTED ROOF SECTION). Roof covering fire ratings are Class A, B, C, or unrated; with Class A providing the best performance. G-P Gypsum DensDeck®, United States Gypsum Co, SECUROCK® Glass-Mat Roof Board (Type SGMRX), National Gypsum “DEXcell Glass Mat Roof Board” or “DEXcell FV glass Mat Roof Board”. 4½" thickness UL Class A with min. B. Video Library. TPO Roofing Systems 101. UL tests rate an entire assembly. Ft. of Details No. 1-800-257-6215. Class A Roofing Mike S. Hudson, Owner PO Box 6500 Incline Village, Nevada 89450 775-831-9171 mike@classaroofing.com The Fireguard SBS roofing system is manufactured with fire-retardant chemicals, qualifying the assembly for the UL Class A/B fire rating over combustible and noncombustible deck. 3. It is only intended to be used by experienced professionals who follow proper safety and workmanship practices. ** NOTE TO SPECIFIER ** Insert the appropriate DORA Assembly number as found in the current Directory of Roof Assemblies (DORA) by SPRI. UL is a global independent safety science company with more than a century of expertise innovating safety solutions. Technical Bulletins. Detail 3-A 8.10 and 4 A 8.10 shows the gutter condition at the sill end of the skylight ... Class A roof construction per ASTM E108, FM4770, NFPA 256, UBC 32-7, ULC-S107, … The designation primarily differentiates between burn rates. Where more than twenty-five percent (25%) of the total roof area is replaced, altered or repaired within any twelve month period. 5. Short for thermoplastic polyolefin, TPO is a single-ply roofing membrane that offers excellent performance at a cost-effective price. The building code lists a number of roof types deemed to be Class A (in other words, testing is not required). Roof Slope of 3/12. If the MUA risers are to be field cut, cut the risers in as desired. 1. In many in-stances, the use of nontreated, construction-grade wood is suitable for use in roof assemblies as blocking or nailers provided reasonable measures are taken to ensure the nontreated wood remains reasonably dry when in service. Examples of a by assembly fire rating include fire-retardant treated wooden shakes and aluminum roof coverings. LOCATE A SALES REP. FIND A DISTRIBUTOR. Class A roof assemblies are those that are effective against severe fire test exposure. Parapro Roof Membrane 35 Details 36 Teranap Plaza Deck/Teranap Green Roofing 40 System Layouts 41 ... Class A rating. Also, try to ensure that the membrane does not rely on adhered or embedded sheet metal for water- proofing. Furthermore, Class "A" rated tile roof systems are usually eligible for the lowest fire insurance rates. The roof is the most vulnerable part of any home during a wildfire. Since tile roof tiles are noncombustible, they enhance a structure's level of fire safety. All. Go to work with a building solution that meets building code requirements for fire-resistent construction while increasing structural ratings. 8.2. January 21, 2013. Richard L. Fricklas. The current CRCA Roofing Specification manual no longer refers to Roof Classes. Roof assemblies with designation Class A or Class B can also be applied on Class C structures. Note 1: Underlayment and Asphalt Shingles are listed Class A components of a listed roof deck assembly by an Approved Agency. All other areas in Santa Cruz County require a Class 'B' minimum roofing assembly, … Description. Class A roof assemblies include minimum 16 ounce per square foot (0.0416 kg/m 2) copper sheets installed over combustible decks. Appropriately, metal panels are included: ferrous (steel) and copper shingles or sheets, metal sheets, and shingles on noncombustible decks (e.g., steel, concrete—not wood), or on noncombustible framing where a deck is not included (e.g., directly over metal purlins). Locate the assembly and unpack from the crate. The most common flashing for standing seam roofing is the ridge cap, which is used at the peak of a roof where two opposing roof slopes join, and attaches to the roof with z-flashing. Where a specific construction detail provides for a sec- Sika Sarnafil. Trusses supporting metal roof deck panels covered by 1/2” (12.7 mm) regular gypsum sheathing either loose laid, or adhesively or mechanically attached to roof deck. 2. Heat-welded seams provide superior strength. However, unless you can design a way to just put metal roofing on the building without a support system (i.e. DensDeck® roof boards are designed to address four persistent challenges inherent in commercial roofing assemblies: fire resistance, moisture absorption, strength and dimensional stability. The greatest risks to roofs aren’t always seen. Ballasted systems are traditionally the easiest of all systems to install and have earned the Underwriters Laboratories Class A rating. … ... A UL rated Class A roof assembly has up to ____ wide of a flame spread during testing? Standing Seam Roofing. It There are three levels of fire resistance; Class A is the highest level. The finished assembly provides a strong, Description: Standing seam roofing is composed of preformed or field formed pans, usually between 14 to 18 inches wide when finished. Fire‐resistance classifications A, B and C relate to exterior fire exposure and are intended to represent different levels of fire resistance performance. Class A is the highest rating, offering the highest resistance to fire, and unrated is the worst. Examples of a Class A roof covering include concrete or clay roof tiles, fiberglass asphalt composition shingles and metal roofs. An example of an unrated covering is an untreated wood shake roof. Explore each roof assembly in greater detail below or dig into the downloadable materials to learn more. Fire resistance is based on two test standards: UL 790 and ASTM E 108. Because of its high thermal performance, it is the product of choice for energy-aware architects, specifiers, … ROOFING 1. Floor/Ceiling Assemblies Ceiling system, lighting, HVAC outlets, and other penetrants through the ceiling, the plenum, structural system, subfloor, and finish floor. tance and fire ratings of cold-formed steel assemblies. Class A roof assemblies and roof cov-erings shall be listed and identified as Class A by an approved testing agency. The Brand test simulates various sizes ranging from 9.25 g to 2000 g (depending upon the Class of roof covering sought) of burning embers landing on the surface of the roof covering. Although designed for roof systems, 138T and 238T panels can be utilized as a wall system. The details for the manufacturers’ system typically include the following information: The UL 790 classification (e.g. Where the room‐side fire‐resistance‐rated membrane of Roof covering fire ratings are Class A, B, C, or unrated; with Class A providing the best performance. • UL 1256 – Fire Test of Roof Deck Constructions, Roof Deck Construction No. Asphalt is one of the oldest roofing technologies still in use today and it is a reliable solution for both residential and commercial roofing needs. Ballast Roof. CSA A123.21 Assemblies. Steel Roof Deck — Max 3 in. 3. B. The hourly rating of the roof assembly shall be equal to or greater than the hourly rating of the wall assembly. the roof deck, such framing members shall be not less than 3 inches, nominal, in width. (Note FM Class I Roof Coverings are not specifically listed in the IBC, but since the FM test procedures include ASTM E 108, a FM Class I roof covering would be acceptable to the IBC.) Steel Roof Deck — Max 3 in. work proposed and show in detail that it will conform to the ... or floor/ceiling assemblies and roofs or roof/ceiling assemblies shall be protected by an approved fire-resistant ... Class l (Thermal) 500 1 Class ll (Wind Sway) 500 10 Class lll (Seismic) 100 30 38. 1.1 The test methods described in this fire-test-response standard are applicable to assemblies of masonry units and to composite assemblies of structural materials for buildings, including loadbearing and other walls and partitions, columns, girders, beams, slabs, and composite slab and beam assemblies for floors and roofs. Class A, B or C roof coverings may be applied directly to the concrete or wood surface of floor/ceiling designs being used as ro of/ceiling designs without a reduction of the fire resistance rating. 1. Architectural and Structural Roofing Products. 26 galvanized sheet gage. The 1978 Roofing Specification manual classified a Class A roof as a 4-ply built-up roof membrane (organic felt), and a Class B specification meant that one ply and one mopping of asphalt was deducted (3-ply built-up roof). Insulated steel deck roof components, incorporated in a complete insulated steel deck roof assembly(s), which exhibit low fire spread below the deck, adequate simulated wind uplift resistance, minimum heat damage potential and adequate strength during the Approval examination will qualify as a Class I assembly. The class-A fire-retardant roof tiles are plugged with metal bird stop. 3. ARMA offers roofing professionals a wide variety of general, educational and specialized publications on both residential and commercial asphalt roofing systems. 2x4 Lumber, Oriented Vertically or Horizontally. 4. Summary of Topics. "What I like about [ 3M™ Fire and Water Barrier Tape] is it has infection control built in. Class A-B-C Roof Coverings Class A, B, or C roofing systems are sometimes confused with Class A-B-C/I-II-III flame spread categories above. Class A, B or C roof coverings may be installed over existing classified roof assemblies under the following conditions without additional roof classification tests, provided the resulting classification that roof covering on roof assemblies that incorporate EPS insulation must be classified as part of a Class A, B or C roof assembly. Cornices are built up with 2x12s and 2x8s and covered with 1-in. Multi-Ply SBS-Modified Bitumen Systems. To the present day, static simulation was the only available method to compare roofing assemblies with winduplift resistance. “1505.2 Class A roof assemblies. Standard 790, Edition 8 Edition Date: April 22, 2004 DOD Approved: March 21, 1984 ANSI Approved: October 19, 2018 USD $402.00-$998.00. (705A.2;R327.5.2) 2. Other organizations, such as the Brick Institute of America, the AISI and CSSBI, have limited information, details and design information. Because FM Approvals requires a 2:1 safety factor, roofs with field of roof uplift forces of 30 pounds per square foot are the maximum for 1-60 ratings, and 37.5 pounds per square foot are the maximum for 1-75 ratings, etc. A white IB Roof Systems membrane can reduce your energy consumption and your rising electric bills, by reflecting up to 90% of the heat that normally enters a home through the roof. Ask The Expert. Fire ratings may pertain to resistance to fire from above the roof system (the familiar Class A, B, or C ratings), or fire exposure from the building interior (the underside of the roof deck). The minimum roof coverings No interior Class I vapor retarders are installed on the ceiling side (attic floor) of the unvented attic assembly or on the ceiling side of the unvented enclosed rafter assembly. Class A roof assemblies and roof coverings shall be listed and identified as Class A by an approved testing agency. This aluminum roof covering is an assembly-rated Class A. 1505.2 Class A roof assemblies. What is wrong about this detail on the EPDM roof edge? 3. Each of our systems is patented and conform to UL 2703. The following conceptual details (Figures 9-1 to 9-6) show some of the typical conditions commonly encountered. Roof Insulation — Min 2-1/4 in. 2. Burlington, NJ 08016. 11. Most roofing membranes, as well as a single-layer, self-adhered, bituminous sheets, are Class I … Reminders: 1. Where 1/2-in. When provided, valley flashing shall be not less than No. Truss depth shall be 5-1/4" with a Min. (76 mm) deep galv steel fluted roof deck. Locate the wall and ceiling joists that will support the assembly. Designed by installers for installers, these complete systems are faster … Panels are mechanically attached with hidden fasteners to a continuous solid substrate with an A roofing assembly that, in combination with the roof slope, has been classified by an approved testing agency, with a listing and follow-up service, as "Class A" in compliance with ASTM E 108 or UL 790. DensDeck roof board is a patented glass mat-faced, noncombustible, nonstructural, treated gypsum core panel. 2. (roofing) an assembly of interacting roof components including the roof deck, vapor retarder (if needed), insulation and roof covering The roofing assemblies incorporating the membranes comply with the following properties when installed as described in this report. Learn how adding a DensDeck® Prime or DensDeck® StormX™ Prime Roof Board to your roof assembly can help thwart the common damage inflicted by water, wind, fire, puncture, and more. If you need clarification or more information please contact one of … Resistance Directory. Any space between the roof covering and roof decking or at the eave end shall … 9.3 BUILT-UP ROOFING Class A designation Refers to material that may ignite but will not sustain a flame. Fire Resistive Technology. Roof covering shall be Class A as specified in Section 1505.2/R902. All replacement, alterations, or repairs. 4½" thickness UL Class A with min. Built-up roofing, also called BUR, is the most common roofing material used on low-slope roofs. LP ® FlameBlock ® is an ICC-ES evaluated component of 1- and 2-hour fire-rated wall assemblies and roof deck applications. 3. Class A roof assemblies shall be permitted for use in buildings or structures of all types of construction. 30, Class 60 and Class 90 tests. The recommended method is to apply the base coat in two (2) passes. UL Class A UL Class A Not Applicable Not Applicable UL Class A InsulRoof HD Composite (Flat EPS factory-bonded to ½"-thick 100 psi high-density polyiso) UL Class A UL Class A UL Class A UL Class A UL Class A UL Class A UL Class A with min. Assembly-rated Class A roof coverings are those that meet Class A standards when combined with other elements. 9.3 BUILT-UP ROOFING Class A products will not Class A products will not generate excessive visibility-obscuring smoke, an important factor in designing safe egress • While a Class 1 assembly can be substituted for a Class A, Roof system is designed to achieve a FM 1-___ wind uplift rating. For insulated steel roof deck assemblies, FM Class 1 includes FM 4470 and FM 4450 Approval Standard for Class 1 Insulated Steel Decks Roofs. It is reinforced with metal lath and is installed with a series of three separate polymer-modified cementitious applications, and sealed with Westcoat’s SC-10 Acrylic Topcoat. COVER BOARD IN HIGH IMPACT AREAS. The finished product weighs approximately 2½ lbs per square foot. "CLASS B" ROOFING ASSEMBLY. on the roof for prolonged periods (longer than 48 hours). Asphalt Roofing … The operative word here is systems. Class A fire testing is considered severe fire test exposure, while Class B is considered moderate fire test exposure, and Class C is considered light fire test exposure. Polyiso roof insulation, perm rating 1.0. Please note, however, that the performance of a roof depends on all components used in the roofing assembly and how the components interact. Due to the materials used in their construction, most asphalt shingle roof assemblies have a Class A fire resistance rating. Detail the space between the roof covering and roof decking; the spaces shall be constructed to prevent the intrusion of flames and embers, or provide one layer of 72 pound mineral-surfaced nonperforated cap sheet meeting ASTM D3909. A. Polyisocyanurate (polyiso) is a closed-cell, rigid foam board insulation used in roof and wall assemblies within commercial and residential buildings of all types. The roof assembly shall include the following construction features: A. Fire Classification: Roofing assemblies covered under this report have been tested for fire classification Class A, B, or C in accordance with UL 790 (ASTM E108), as required by . 4. tance and fire ratings of cold-formed steel assemblies. Class B Roofs. All Class 1 roof assemblies are Class A roofs, but not all Class A roof systems meet the Class 1 rating. Waterproofing - Monolithic Membrane 6125 - Waterproofing Monolithic Membrane 6125® (MM6125®) is a thick, tough, flexible, self-healing membrane for use in waterproofing. MM6125 is a special formulation of refined asphalts and synthetic rubbers. To get the Class A rating on a Metal roof you need a listed assembly. Class A roof assemblies include ferrous or copper shingles or sheets, metal sheets and shingles, clay or concrete roof tile, or slate installed on noncombustible decks. Concrete roof decks are inherently more fire resistant than steel and have a different set of criteria for rating. Class A, B, or C) The deck construction supporting the roofing system (combustible or noncombustible) Any restrictions on the roof incline A noncombustible (tile or metal) or Class 'A' roofing assembly is required in SRA - Very High Fire Hazard Severity Zones. Roof assemblies shall be divided into the classes defined below. It minimizes air movement by eliminating the need for a sprayer, making it the top tool for health care-qualified firestop contractors." A roof is classified as a Class A as the result of one test, the external spread of flame test (ASTME 108 or UL 790 Standard). Class A, B or C roof coverings may be applied directly to the concrete or wood surface of floor/ceiling designs being used as ro of/ceiling designs without a reduction of the fire resistance rating. These revisions to ANSI/UL 790 include the following changes in requirements: Addition of Appendix A - Additional Procedure for Calibration of Apparatus. (Note FM Class I Roof Coverings are not specifically listed in the IBC, but since the FM test procedures include ASTM E 108, a FM Class I roof covering would be acceptable to the IBC.) Get Inspired! roof membrane will always drain free and clear of any adjacent system. Asphalt Roofing Solutions 101. Wood Roof: Wrap Back: 1-Hour: 2" x6" @ 24" o.c., 2" x10" wood rafter, 2" x 4" @16" o.c. For example, shake roofing with a fire-retardant treatment rates Class B on its own, but achieves a Class A rating when combined with specified underlying materials such as … 3. The "PV system" consists of the racking system AND the module as an assembly. An MBMAbuilding with a fire rated roof assembly places the metal building in a totally new class of construction with the following advantages: 1. The lower portion of a sloping roof assembly that projects beyond and overhangs an exterior wall at the lower end of the rafter tails. Size Duct Area per Assembly Construction Design Rating Tiles/Panels Panel System % Ceiling Area 100 Sq.
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