Majestic Appliances EWF36A Ceiling Chimney Hole Possible Obstructions, Cutting the Hole

Vermont Castings EWF36A

Locate center point of the chimney on ceiling as though a straight up chimney arrangement is to be used. Measure your offset dimension from straight up chim- ney center point on ceiling.

Ceiling Chimney Hole/

Possible Obstructions

The size of the hole in ceiling will vary with the angle at which the chimney passes through ceiling.

Drive a nail up through ceiling at marked chimney center point. Go to floor above and see where hole will be cut. Check to see where existing ceiling joists and other possible obstructions are located...i.e. wiring, plumbing etc... If necessary, re-position chimney and/or fireplace to avoid obstructions.

Cutting the Hole

Cover fireplace collar opening and cut proper sized chimney hole in chimney.

Framing the Ceiling Hole

Frame the ceiling chimney hole as shown in Figure 10. It is good practice to use framing lumber that is the same size as the ceiling joists; this is a requirement at attic level.

The following table gives firestop spacer model num- bers:

Chimney Hole Size

	Angle of Chimney at Ceiling
Size of Chimney	Vertical	30°
	FS2A	FS6A
8” Flue	17¹⁄₂” x 17¹⁄₂”	17⁷⁄₈” x 29⁵⁄₈”
	(445 x 445mm)	(454 x 753mm)

Fig. 9 Ceiling chimney hole sizes necessary for installing firestop spacer.

The inside dimension of the frame must be the same as the hole size selected from Figure 9 in order to provide required the 2” (51mm) air space between the outside diameter of the chimney and the edges of the framed ceiling hole.

Positioning, Safety Strips,

Securing the Fireplace

Slide fireplace into position.

Safety strips are used to ensure that any combustible materials in front of the fireplace are protected even though a noncombustible hearth extension is required.

When the finished extended hearth is added, the top of the finished hearth must be flush with the bottom of the fireplace. “Z” shaped metal safety strips have been

Existing	17¹⁄₂”	17¹⁄₂”
Ceiling		(445mm)
	(445mm)
Joists

Chimney

Hole

New Framing

Members

			Ceiling	FP551b
Fig. 10	Typical frame for ceiling chimney hole.
			“Z” Metal Safety
			Strips (1 or 2 pcs.)
				“Z” Safety
				Strip
			Fire-	Decorative
1¹⁄₂”			place	Hearth
				Face
(38mm)		1/2” Min.
			Plat-
		Overlap
			form
			Hearth Ext.	FP557b
Fig. 11	Safety strip installation.

supplied with the fireplace and are required for installa- tion. The safety strips provided have a 1” offset. For applications with a greater offset, “Z” shaped strips will have to be fabricated of metal. Overlap safety strips at least 1/2” to provide a positive joint. The safety strips must also extend at least 1¹⁄₂” (38mm) beyond the sides of the fireplace. (Fig. 11)

NOTE: Safety strips are not required over noncombus- tible floors where all supports at the base of the fire- place are noncombustible.

Four (4) nailing flanges are supplied with the fireplace (found on the fireplace hearth). To level the box and secure it firmly in place, remove the nailing flanges from the hearth and install at the sides of the fireplace as shown in Figure 12.

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