To: All customers needing information on FIRE TREATED STAIRWAYS.

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1 To: All customers eedig iformatio o FIRE TREATED STAIRWAYS. For may years, The Marwi Compay has offered as a optio FIRE TREATED STAIRS. We are proud to promote our D-Blaze Fire Retardat Treated Plywood. The plywood used o our Fire Treated Stairs is treated with a fire retardat which meets the UL stadards for the desigatio of FRS Ratig. This meas that the treatmet has met the 30 miute test stadards for Flame Spread, Smoke Developed, & Fuel Cosumptio to achieve the FRS desigatio by Uderwriters Laboratories. The fire retardat treated plywood used i The Marwi Compay, Ic. stairways carries a Class I or A ratig which is recommeded for areas where fire hazards are most severe. Materials with the lowest rate of flame spread (0-25) are classed by all buildig codes as Class I or A. D-Blaze s flamespread characteristics have bee tested ad approved by the followig applicable stadards: NFPA Stadard No. 255 ASTM Stadard E-84 UL Classified with FR-S Ratig There is o idustry ratig o foldig attic stairways such as 15 miute, 20 miute, etc. Therefore, our stairs are NOT Rated by ay group, but the plywood we use does meet the UL FRS Stadard. If you eed ay iformatio, please call our Customer Service departmet at Rev

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3 A BCDEF A AA BCADDEAECCDDEDDECDADEDAAED EDDEFEDDEEDAAAEDE EDAAEDAEDAEEDACDDEFEDEAEEAA EDAAEDAEDEDAAEADDDD DEA EACED D 200 E. Woodlaw Road Charlotte, NC Fax:

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6 D-Blaze fire retardat treated (FRT) wood is available for iterior applicatios where fire retardat costructio materials are required by buildig codes. D-Blaze treated lumber ad plywood is highly effective i cotrollig the spread of flame ad smoke caused by fire. D-Blaze treated products show o evidece of sigificat progressive combustio at 30 miutes exposure to flame. I most applicatios, D-Blaze treated products offer a lower i-place cost tha ocombustible-classified materials. Product Features UL Classified with FR-S Ratig Code Compliat uder ESR 2645 Very Low Smoke Ratig Low-corrosivity Low-hygroscopicity No VOC s or Formaldehyde Workable with commo wood-workig tools No-bloomig 50-Year Limited Warraty D-Blaze Treated Products are: Compliat with major buildig codes (IBC & IRC). Tested ad certified by Uderwriters Laboratories (UL). Quality Cotrol assured by third-party ispectio agecies such as TP, SPIB ad UL. UL classified with a FR-S ratig for the species listed i Table 5. Exhibits a flame spread ad smoke developed idex of 25 or less uder ASTM E 84 flame tuel testig of a 30-miute duratio without evidece of sigificat progressio combustio. D-Blaze has oe of the lowest smoke ratigs i the idustry. Compliat with codes uder ICC-ES ESR 2645 for the species listed i Table 5. Exhibits a flame spread idex of 25 or less whe subjected to ASTM E 84 flame tuel testig of 30-miute duratio without evidece of sigificat progressive combustio. Tested for hygroscopicity i accordace with ASTM D 3201, resultig i classificatio as a iterior Type A (HT) fire-retardat wood as defied i AWPA Stadards P50, U1, UCFA. Protected by a 50-Year Limited Warraty. Visit for warraty details. Commo Applicatios Roof ad floor trusses Roof decks ad sheathig Iterior o-load-bearig partitios Exterior load-bearig walls protected by a weather barrier Subfloorig Studs ad Joists Beams ad purlis Blockig ad furrig How to Specify D-Blaze FRT Lumber ad Plywood To assure structural itegrity i roof areas of high temperature ad humidity, D-Blaze spa ad stregth desig adjustmet factors have bee determied by idepedet third parties i accordace with ASTM D 5516 for plywood ad ASTM D 5664 for lumber. Exteded specificatios ca be foud i Sweet s Directory ad ARCAT. All D-Blaze FRT lumber ad plywood: shall be pressure-treated with D-Blaze fire retardat to meet Uderwriters Laboratories FR-S ratig or a flame spread ad smoke idex ratig deotig a surface-burig characteristic ratig of 25 or less for flame spread ad smoke developed. shall bear the Uderwriters Laboratories label or stamp attestig to the FR-S ratig or flame spread ad smoke idex ratig, or the ESR 2645 Buildig Code Approval, ad to the fact that it also meets the America Wood Protectio Associatio (AWPA) P50, U1, UCFA for iterior Type A (HT) use. shall be kil-dried to a maximum moisture cotet of 19% for lumber ad 15% for plywood. shall be kept dry at all times durig trasit, job site storage ad costructio. All structural desig calculatios shall be based o the D-Blaze Stregth Desig Factor Tables as published i ESR AWPA P R OTECTING W OOD SINCE 1904 Proud Sposor ESR Stadardized 3-part specificatios are available at ad FR-S Ratig 1 of 4 Viace LLC 200 E. Woodlaw Rd., Suite 350, Charlotte, NC Fax: ProductIfo@viace.et Viace IH-06 10/10

7 Techical Specificatios Structural Properties D-Blaze FRT wood has bee tested by idepedet laboratories followig idustry stadards ASTM D 5516 & ASTM D 5664 to develop stregth reductio factors for various use coditios, icludig roof temperatures of up to 150 F for lumber ad 170 F for plywood. Cosult Table 1 (D-Blaze Lumber Stregth Desig Adjustmet Factors) ad Table 2, 3 ad 4 (D-Blaze Plywood Spa Ratig Adjustmets) for specific adjustmet factors. Testig ad Approvals D-Blaze FRT wood meets or exceeds the guidelies for testig costructio materials as set forth ad/or established by the followig authorities ad specificatios: Testig Approvals ASTM D 5516 ICC-ES ESR 2645 ASTM D 5664 City of Los Ageles RR ASTM E 84 CAN/ULC S102 ASTM D 3201 CAN/ULC S102.2 Natioal Fire Protectio Associatio (255) New York City Buildig Code (MEA Numbers ad ) Natioal Buildig Code of Caada Table 1 Stregth Desig Adjustmet Factors for D-Blaze Fire Retardat Lumber compared to Utreated Lumber Property Service Temperature < 100 F (38 C) D-Blaze Lumber Roof Framig Climate Zoe 1,2 1A 1B 2 Compressio Parallel, Fc Horizotal Shear Tesio Parallel Bedig: Modulus of Elasticity, E Bedig: Extreme Fiber Stress, Fb Fasteers/Coectors Table 1 1 Climate Zoe defiitio: Zoe 1 Miimum desig roof live load or maximum groud sow load 20 psf (960 Pa) Zoe 1A SouthWest Arizoa, South East Nevada (area bouded by Las Vegas- Yuma- Phoeix- Tucso) Zoe 1B All other qualifyig areas of the Uited States Zoe 2 Maximum groud sow load 20 psf (960 Pa) 2 Duratio of load adjustmets for sow loads, 7-day (costructio) loads, ad wid loads as give i the Natioal Desig Specificatios for Wood Costructio apply. 2 of 4 Viace LLC 200 E. Woodlaw Rd., Suite 350, Charlotte, NC Fax: ProductIfo@viace.et Viace IH-06 10/10

8 Techical Specificatios Table 2 Spa Ratigs for D-Blaze Fire Retardat Souther Pie Plywood for Roof Sheathig Applicable at a Temperature up to 170º F (77ºC) Based o Uiform Loadig, Two Spa Costructio ad L/180 Deflectio Limit Table 3 Plywood Thickess (Iches) D-Blaze 1,2,3,4,5,8,9,10,11,12,13 Plywood Roof Sheatigs Spa Ratigs Used at Temperatures > 100 F ad < 170 F Climate Zoe 6,7 1A 1B 2 3/8" (0.375) /32" (0.469) /2" (0.500) /32" (0.594) /8" (0.625) /32" (0.719) /4" (0.750) /8" (0.875) (1.000) /8" (1.125) Spa Ratigs for D-Blaze Fire Retardat Douglas Fir ad other species Plywood for Roof Sheathig Applicable at a Temperature up to 170º F (77ºC) Based o Uiform Loadig, Two Spa Costructio ad L/180 Deflectio Limit Plywood Thickess (Iches) D-Blaze 1,2,3,4,5,8,9,10,11,12,13 Plywood Roof Sheatigs Spa Ratigs Used at Temperatures > 100 F ad < 170 F Climate Zoe 6,7 1A 1B 2 3/8" (0.375) /32" (0.469) /2" (0.500) /32" (0.594) /8" (0.625) /32" (0.719) /4" (0.750) /8" (0.875) (1.000) /8" (1.125) Tables 2 ad 3 SI Uits Coversio: 1 ich = 25.4 mm, 1 psf = 48 N/m2 1 All loads are based o two-spa coditio with paels 24 iches wide or wider, stregth axis perpedicular to supports. 2 Fasteer size ad spacig must be as required i the applicable buildig code for utreated plywood of the same thickess. 3 Roof spas ad loads apply to roof systems havig the miimum vetilatio areas required by the applicable buildig code. Fifty percet of required vet area must be located o upper portio of sloped roofs to provide atural air flow. 4 For low-sloped or flat roofs with membrae or built-up roofig havig a perm ratig less tha 0.2, use rigid isulatio havig a miimum R value of 4.0 betwee sheathig ad roofig, or use ext thicker pael tha tabulated for the spa ad load (e.g., 19/32 for 24 iches, 23/32 for 32 iches); ad use a cotiuous ceilig air barrier ad vapor retarder with a perm ratig less tha 0.2 o the bottom of the roof framig above the ceilig fiish. 5 For ublocked roof diaphragms pael edge clips are required for roof sheathig: oe midway betwee supports for 24-ich ad 32-ich spas, two at 1/3 poits betwee supports for 48-ich spa. Clips must be specifically maufactured for the plywood thickess used. 6 Tabulated loads for Zoe 1A are based o a duratio of load adjustmet for 7-day (costructio) loads of Tabulated loads for Zoe 1B ad Zoe 2 are based o a duratio of load adjustmet for sow of All values withi the table are based o a dead load (DL) of 8 psf. If the DL is less tha or greater tha 8 psf, the tabulated live load may be icreased or decreased by the differece. Applicable material weights, psf: asphalt shigles - 2.0, 1/2-ich plywood - 1.5, 5/8-ich plywood - 1.8, 3/4-ich plywood Climate Zoe defiitio: ZONE 1 Miimum desig roof live load or maximum groud sow load 20 psf (960 Pa) ZONE 1A SouthWest Arizoa, South East Nevada (area Bouded by Las Vegas- Yuma- Phoeix- Tucso) ZONE 1B All other qualifyig areas of the Uited States ZONE 2 Maximum groud sow load 20 psf (960 Pa) 8 Duratio of load adjustmets for sow loads, 7-day (costructio) loads, ad wid loads as give i the Natioal Desig Specificatios for Wood Costructio apply. 9 D-Blaze treated plywood must ot be used as roof sheathig if a radiat shield is used beeath the roof sheathig. 10 The 19/32-ich ad 5/8-ich thickess are limited to performace rated 4-ply or 5-ply. 23/32- ad 3/4-ich thickesses are limited to performace rated 5-ply or 7-ply. 11 Deflectio of roof sheathig at tabulated maximum live load is less tha 1/240 of the spa, ad uder maximum live load plus dead load is less tha 1/180 of the spa. 12 Staples used to attach asphalt shigles must be miimum 15/16-ich crow ad miimum 1-ich leg, or otherwise comply with the applicable code, with the quatity of fasteers adjusted i accordace with Table 1 of this report. 13 Placemet of isulatio ad airflow should be desiged to maitai acceptable wood temperatures. Good vetilatio is essetial i fire retardat wood costructio to miimize excessive relative humidity ad codesatio. At relative humidity coditios whe FRW moisture cotet levels are expected to exceed 15%, appropriate desig value adjustmets for high moisture cotet should be made. 3 of 4 Viace LLC 200 E. Woodlaw Rd., Suite 350, Charlotte, NC Fax: ProductIfo@viace.et Viace IH-06 10/10

9 Techical Specificatios Table 4 D-Blaze Treated Plywood Subfloor Allowable Spas (Iches) used at Temperatures < 100º F (38º C) Plywood Thickess (Iches) Souther Pie Allowable Spa (Iches) 1,2 Douglas Fir Allowable Spa (Iches) 1,2 3/8" (0.375) /32" (0.469) /2" (0.500) /32" (0.594) /8" (0.625) /32" (0.719) /4" (0.750) /8" (0.875) (1.000) /8" (1.125) Table 4 SI Uits Coversio: 1 ich = 25.4 mm, 1 psf = 48 N/m2 1 Uiform live load = 100 psf ad Dead load = 10 psf, LL deflectio L/360, LL+ DL deflectio L/240 2 Fasteer size ad spacig must be as required i the applicable buildig code for utreated plywood of the same thickess. Proper roof system vetilatio shall be used to provide a uiform flow of air over all iterior surfaces of the plywood to prevet heat build-up ad sufficiet to effectively remove moisture where the roof is warmed by solar radiatio. Safety & Hadlig D-Blaze pressure-treated products do ot cotai ay EPA-listed hazardous chemicals ad are easy to work with, requirig o special precautios other tha routie wood workig safety procedures. Whe workig with or machiig D-Blaze pressure-treated wood, the followig safety precautios should be followed: Wear gloves to protect agaist spliters. Wear a dust mask whe machiig ay wood to reduce the ihalatio of wood dusts. Wear appropriate eye protectio to reduce the potetial for eye ijury from wood particles ad flyig debris durig machiig. Wash thoroughly with mild soap ad water after workig with treated wood. Wood scraps should be disposed of i accordace with local waste maagemet regulatios. Do ot bur. Refer to the latest D-Blaze Material Safety Data Sheet available at AWPA P R OTECTING W OOD SINCE 1904 Proud Sposor ESR 2645 FR-S Ratig Table 5 The followig species are buildig code compliat whe treated accordig to ESR 2645, ad these species also have the UL FR-S Classificatio. D-Blaze Lumber ad Plywood Approved Species Softwood Lumber Jack Pie Red Pie Hem-Fir Black Spruce Lodgepole Pie Alpie Fir Spruce-Pie-Fir (SPF) Eglema Spruce Poderosa Pie Balsam Fir White Fir Red Spruce Souther Pie Douglas Fir Wester Hemlock White Spruce Plywood Douglas Fir Laua Souther Pie Red Pie Hardwood lumber Basswood Red Oak NOTE: From time to time, additioal species will be tested. Check with your supplier if the species desired are ot show. 4 of 4 Viace LLC 200 E. Woodlaw Rd., Suite 350, Charlotte, NC Fax: ProductIfo@viace.et Viace IH-06 10/10