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i <br /> Figure i <br /> 3Mr'" Pire Barrier Duct Wrap 615+Commerciai Kitchen Grease Duct Systems <br /> 1 or 2 Hour Shaft Afternative Zero Clearance to Cambustibles <br /> Telescoping Wrap Technique With Banding For Ducts 24 inches (60,9 cm) or Less <br /> • 1. First Layer 3MT"' Fire Barrier Duct Wrap 615+ - 2 <br /> 2. Secand Layer 3MT"' Fire Barrier Duct Wrap 615+ <br /> � 3. 3/4 in. (19 mm�Wide Filament Tape � <br /> 4. Stee! Banding 112 in. {13 mm�Wide Min. 5 <br /> Typical for Permanent Fastening 6 <br /> 5. 3 in. (76 mm) Min. �ongitudinal Overlap � <br /> 6. 3 in. (76 mm) Min. Perimeter Overlap <br /> S <br /> 5ystem integrity is limited by quality of instailation. 3 \��;, <br /> Ducts>24 in. (60,9 cm)Wide Require Pinning an ,1 �'�� <br /> the Battam Side. � �$`� ,� <br /> .,r��., <br /> •.� .�.,r�,,, <br /> Consult Current Independent 7esting Laboratories �`1,� �� <br /> (Intertek, UL) Far Design or System Details. `�' <br /> There are three (3) approved instatlation techniques for insta!ling the <br /> 3MT"' Fire Barrier Duct Wrap 515+ (See Figures 1A, 1B, & 1C): <br /> 1.7elescoping 3 in. (76 mm) Overlap Wrap <br /> Cross Sectian View <br /> . Figure 'fA <br /> With the telescaping overlap wrap method, each <br /> blanket overlaps one adjacent blanket, and each '•c's°'m� '-t'6 mm' <br /> blanket has one edge exposed and one edge 1-1/Y(38 mm� 2 � 3 ,-}J2•c3s mm> <br /> covered by the next blanket as shown in Figure 1A. <br /> The visible edges of the perimeter over{aps aIl point <br /> in the same direction. <br /> 1. One Layer 3MT'" Fire Barrier Duct Wrap 615+ ( Z,•c5,., �m�TYP. _) <br /> 2. Steel Banding 1/2 in. (13 mm)Wide Min.Typical � <br /> 3. 3 in. (76 mm) Min. Longitudinal Overlap <br /> 2. Checkerboarti 3 in. (76 mm)Overiap Wrap <br /> Cross Sectian View <br /> Figure 1 B <br /> With the 3 in. (76 mm) checkerboard overlap <br /> wrap method, blankets with both edges expased 3•{'6 mm, ''{'6 mm, <br /> alternate with blankets with covered edges, as �-t,2•c3�mm> 2 1 3 ,-„2•c3�mm, <br /> shown in Figure 1 B.The visible edges of the <br /> perimeter overlaps alternate their directions and ��-- <br /> :.� <br /> appear on every other blanket. ----- ---- - <br /> _ 1. One Laysr 3MT"" Fire Barrier Duct Wrap 615+ 2�-c5�.3=m,Typ. <br /> 2.Stse! Banding 1!2 in. {13 mm}Wide Min.Typical � <br /> _ 3. 3 in. {76 mm} Min. �.ongitudinal Overlap <br /> 4 <br />