Burnham SCG 1100-H4 - Manual (Page 35)

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Fire Stop/Wall Thimble/Support, (SC_ _FS):
• The Saf-T Vent SC Fire Stop can be used as a firestop, a wall thimble, or as a support plate.
• To use as a Wall Thimble prepare an opening according to the chart below. Remove any insulation from the opening,
using additional framing if necessary. Attach the plate over the center of the opening using appropriate fasteners.
• Install the vent section through the thimble plate and secure the section to the thimble by screwing the self-tapping
screws through the holes in the tabs on the plate and into the outer wall of the vent. Apply silicone sealant around the vent
section where it passes through the plate and around the plate where it is attached to the structure.
• To use as a Firestop before passing through ceilings or enclosed chases, prepare a round or square opening ¼” larger than
the outer jacket (5¼” for 3” vent or 7¼” for 4” vent). Remove any insulation from the opening. Secure the firestop to
the structure at the four (4) corners. Install the vent section through the firestop and secure to the thimble by screwing the
self-tapping screws through the holes in the tabs on plate and into outer wall of the vent. This method can also be used to
support the vent section either vertically or horizontally.
Tall Cone Flashing:
Directly On Roof or Curb:
Tall Cones are available for flat (SC_ _TCF), 2/12 pitch (SC_ _TCFA), and 6/12 - 12/12 pitch roofs (SC_ _TCFB).
Prepare a square or round opening at least 1/4” larger than the outer jacket (5¼” for 3” vent or 7¼” for 4” vent). Remove
any insulation from the opening. Apply weather-stripping or outdoor caulk to the bottom of the cone plate and attach the
plate to the roof using common construction methods. Flash over the cone plate and seal the fastener heads using normal
roofing requirements. When the vent pipe is in place through the Tall Cone, attach a storm collar (sold separately) around
the pipe. Apply high temperature silicone sealant around the pipe where it passes through the top of the storm collar.
Continue to install vent sections as needed to meet the height requirements by code. Seal weather exposed joints of the
outer jacket with foil tape or an exterior grade silicone sealant.