RF-FB-SS-VPB

Letter # RF-FB-SS-VPB

Roof joint fire barriers with SS foil & vapor barrier Construction Specialties, Inc. 6696 State Route 405, PO Box 380 Muncy, Pennsylvania (570) 546-5941 Fax: (570) 546-8022 www.c-sgroup.com

January 19, 2016 Spectrum Specialty Builders Attn: Dan Pridemore 3902 West Valley Hwy North, Suite 500 Auburn, WA 98001 Project: Lincoln Square II

Location: Bellevue, WA

C/S Project #156859 Re: Brake shaped metal for fire barrier flange attachment

Mr. Pridemore, In reference to the above mentioned project it has come to our attention that there is concern for the use a vapor barrier material in front of the fire barrier component which seems to interrupt the intent of having a metal cover over the fire barrier as listed in UL #FF-D-2009. To mitigate this concern, we recommend the use of our 2mil stainless steel foil behind the vapor barrier but in front of the fire barrier to satisfy the UL listing intent. You will find the acceptance of the 2mil stainless steel foil in section 2.B. The foil will be attached in the same manner as the vapor barrier material, “sandwiched” between the frames of the EJC system and the substrate. This will function in the same manner as the UL indicates with the galvanized washer strips, with a continuous “clamping” action of the foil. For example, this type of installation is similar to the installation of a “gasketed” type system over a fire barrier where a metal cover is not available and is to be fulfilled by the stainless steel foil. It is in our opinion that the use of the 2mil stainless steel foil, as detailed herein behind the vapor barrier, will follow the intent of the UL listing and that the fire rated assembly will perform up to its listed rating.

If additional information is required, please feel free to contact us.

Sincerely,

Justin Moon Product Development Specialist Expansion Joint Cover Systems P: 570-546-4602 E: jmoon@c-sgroup.com Encl Cc: file, Pam Weihermuller (C/S)

WRB

!

WRB AT WALLS CANNOT EXTEND LOWER THAN THE TOP OF CURB NO INTERFACE OF FIRE BARRIER RETAINER

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WRB AT WALLS CANNOT EXTEND LOWER THAN THE TOP OF CURB NO INTERFACE OF FIRE BARRIER RETAINER

GALV 16 GA METAL PROFILE INSTALLED ON METAL STUD

2 MILL SS FOIL

CURB CAP FLASHING BY MCKINSTRY, REFER TO SHEET METAL SHOP DRWGS.

Spectrum Specialty Builders

18 GA GALV BRAKE SHAPE

01/15/2016 P092-079513-00 Seismic Exterior P1and 2 R8.pdf C:\Users\Dan\OneDrive\2016 Projects\Linc Square\EXT SHOPS 1-11-16\P092-079513-00 Seismic Exterior P1and 2 R8.pdf

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XHBN.FF-D-2009 - Joint Systems

System No. FF-D-2009 XHBN.FF-D-2009 Joint Systems

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Design/System/Construction/Assembly Usage Disclaimer Authoritie s Having Jurisdiction should be consulte d in all case s as to the particular re quire m e nts cove ring the installation and use of UL C e rtifie d products, e quipm e nt, syste m , de vice s, and m ate rials.

Authoritie s Having Jurisdiction should be consulte d be fore construction.

Fire re sistance asse m blie s and products are de ve lope d by the de sign subm itte r and have be e n inve stigate d by UL for com pliance with applicable re quire m e nts. The publishe d inform ation cannot always addre ss e ve ry construction nuance e ncounte re d in the fie ld.

W he n fie ld issue s arise , it is re com m e nde d the first contact for assistance be the te chnical se rvice staff provide d by the product m anufacture r note d for the de sign. Use rs of fire re sistance asse m blie s are advise d to consult the ge ne ral Guide Inform ation for e ach product cate gory and e ach group of asse m blie s. The Guide Inform ation include s spe cifics conce rning alte rnate m ate rials and alte rnate m e thods of construction.

O nly products which be ar UL's Mark are conside re d C e rtifie d.

Joint Systems Se e Ge ne ral Inform ation for Joint Syste m s

System No. FF-D-2009 March 20, 2006 A ssembly Rating — 2 Hr Nominal Joint Widths — 8, 10 and 12 In. (See Item 2A ) Class II and III Movement Capabilities — 50% Compression, Extension or Horizontal Shear

1. Floor A ssembly — Min 4-1/2 in. (114 m m ) thick re inforce d lightwe ight or norm al we ight (100-150 pcf or 1600-2400 k g/m 3) structural concre te .

2. Joint System — Max width of joint (at time of installation of joint system) is 8, 10 or 12 in. (203, 254 or 305 mm). The joint system is designed to accommodate a max 50 percent compression, extension or horizontal shear from its installed width. The joint syste m consists of the following: A. Mechanical Joint A ssembly — Fire barrie r m ate rial e ncase d in corrugate d m e tal and provide d with inte gral galvanize d ste e l angle s. Angle s are to be attache d to floor with m in 3/16 in. (5 m m ) diam by 1-1/2 in. (38 m m ) long m asonry anchors space d a m ax of 18 in. (457 m m ) on ce nte r. Asse m bly to be installe d in floor in accordance with the installation instructions provide with the product. The following asse m blie s are to be

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XHBN.FF-D-2009 - Joint Systems use d with the diffe re nt joint size s: Nom Joint Width In. (mm)

Mechanical Joint Designation

8 (203)

MFX-8F

10 (254)

MFX-10F

12 (305)

MFX-12F

CONSTRUCTION SPECIA LTIES INC B. Joint Cover — Min 0.034 in. (0.9 m m ) thick m e tallic cove r plate s se cure d to top side of floor, continuous ove r full le ngth of joint. C ove r plate attache d to floor on one side of ope ning only with m in 1-1/2 in. (38 m m ) long m asonry anchors space d a m ax of 18 in.

(457 m m ) on ce nte r. As an alte rnate , whe re the line ar joint ope ning is e nclose d within a chase wall and is non load be aring, a cove r consisting of a cre ase d she e t of m in 2 m il (0.05 m m ) thick stainle ss ste e l foil se cure d with 1 in. (25 m m ) wide continuous galv ste e l washe r strips along e ach side of the joint ope ning m ay be use d. *Be aring the UL C lassification Mark Last Update d on 2006-03-20 Q ue stions?

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