Majestic STR33 manual Common Materials And Factors, STR/CVR Series Woodburning Fireplaces, 7412961

STR/CVR Series Woodburning Fireplaces

Example of Determining Hearth Extension Equivalents

To determine the thickness required for any new mate- rial:

NEW		K of new material (per inch)	thickness
required	=		X of listed
thickness		K of listed material (per inch)	material

Example for Common Brick

T (new) = 5.0 / 0.458 x 0.50 in. = 5.46 in. (new required thickness).

COMMON MATERIALS AND FACTORS

MATERIAL	K*	R	MINIMUM
			THICKNESS

EH2416	1.09	0.50 in.**
����������������� 0.458
Common Brick 5.0	0.10	5.46 in.**

R Value is for ��� inch.

*Units of K = BTU/SQ FT/HR/˚F/IN ** Thickness of Listed Material

Fig. 25 Hearth extension material factors.		FP533AD
	2x4"
Wall Covering	Stud
Noncombustible	�/�"
Decorative
Facing	�/�"
Seal all cracks	Outer Dome	NOTE: �/�"
between fireplace
surround and wall		air space
materials with	2x4" Header -	between
noncombustible		Outer Dome
material.	Do not notch at	and
	standoffs.	combustible
Noncombustible		materials
Decorative
Covering
	Seal crack
Hearth Extension	between fireplace
Insulation	and hearth extension
	with noncombustible
	material.
Side View	Safety Strips -
	Must be overlapped
	���" minimum.
		FP719

Fig. 26 Finish wall treatments and gap sealing.

Seal Cracks Between Fireplace and Hearth

Extension with Noncombustible Material

Noncombustible		Lower Surround
Material 7¹⁄₂"		Noncombustible
Max. Thickness					Fireplace
		Material
Combustible					Hearth
Floor
1/4" Min. Thickness					Majestic Safety
					Strips Must be
	Minimum Insulation				Overlapped 1/2"
FP1170	Value R-0.94				Min.
Fig. 27	Hearth extension dimensions.
Recessed Installation - STR33/36, CVR36 Only
Noncombustible
Material		Minimum
(if desired)
		36” (914 mm)		A
Insulation
with Minimum			6”
R Value
			(152 mm)		Minimum
of 2.75
			Minimum
					33”
					(838 mm)
		2”		2”
		(51 mm)		(51 mm)
		Hearth Extension
				A
		Minimum .030 Thick Stain-
		less Steel Plate
			Insulation with Minimum R
			Value of 2.75
			Minimum .030
	Maximum		Thick Stainless
	10”		Steel Plate
	(254 mm)

Maximum

14” (356 mm)

Hearth	FP1608
Extension

View A

NOTE: If noncombustible material is not used between the stainless steel plate and fireplace opening, the steel must be attached to the front of the unit a minimum of four (4) places on each piece with sheet metal screws no longer than 1/2".

NOTE: The size of the insulation and stainless steel plate must be within limits stated above and covers all combustible framing material.

Fig. 28 Recessed installation.

18 7412961