Lennox Hearth LBR-4324-H, LBC-4324-H, LBC-3824-H, LBR-3824 Framing Specifications, FTF10

Page 7

Note: The framed depth, 25-1/2" (648 mm) from a framed wall, must always be measured from a finished surface. If a wall covering such as drywall is to be attached to the rear wall, then the framed depth must be measured from the drywall surface. It is important that this dimension be exact.

If the appliance is to be elevated above floor level, a solid continuous platform must be constructed.

The header may rest on the top metal spacers, but must not be notched to fit around them.

Consult all local codes.

FRAMING SPECIFICATIONS

Header

Framing Dimensions

 

Fireplace Opening Width

 

 

 

 

38

43

 

 

 

A

48-1/8"

52-7/8"

 

(1222 mm)

(1343 mm)

 

 

 

B

50"

50"

 

(1270 mm)

(1270 mm)

 

 

 

C

26-1/4"

31"

 

(667 mm)

(787 mm)

 

 

 

D

13-1/8"

15-1/2"

 

(334 mm)

(394 mm)

E

77-1/4"

82"

 

(1962 mm)

(2083 mm)

 

 

 

F

38-5/8"

41"

 

(981 mm)

(1041 mm)

 

 

 

G

25-1/2"

25-1/2"

 

(648 mm)

(648 mm)

 

 

 

J

11"

11"

 

(279 mm)

(279 mm)

 

 

 

K

54-5/8"

58"

 

(1388 mm)

(1473 mm)

 

 

 

Back Wall of Chase/Enclosure

Including Finishing Materials

FOAK-4 Combustionif any Air Kit

D K

F

C

A

E

Rough

Corner InstallationFraming Face

(Unfinished Shown)

Figure 13

FOAK-4 Combustion

Back Wall of Chase/Enclosure

Air Kit

Including Finishing Materials

 

if any

G

J

A

Rough Framing Face

(Unfinished Shown)

Outside Chase

B

A

Fireplace Framing

Figure 11

FOAK

Back Wall of Chase/Enclosure

Combustion

Including Finising Materials if any

Air Kit

 

Figure 14

Note: All framing dimensions calculated for 1/2" dry wall at the fireplace face. If sheathing the chase or finishing with other thickness materials, calculations will need to be made.

Framing Dimensions for Ceiling

B

 

Flue Type

A

B

 

FTF10 Vertical

19"

19"

A

 

(483 mm)

(483 mm)

Ceiling Framing

 

 

 

FTF10

19"

29"

Figure 15

Offset 30°

(483 mm)

(737 mm)

 

Framing Dimensions for Roof

 

A

Inside Chase

G

Rough

Framing Face

(Unfinished

Shown)

Pitch

C

D*

 

 

0/12

19"

19"

 

 

 

(483 mm)

(483 mm)

 

 

6/12

19"

22"

 

 

 

(483 mm)

(559 mm)

D

C

 

 

 

 

Figure 12

12/12

19"

27"

Roof Framing

 

 

(483 mm)

(686 mm)

 

 

 

 

 

 

 

Figure 16

* Perpendicular to roof ridge

 

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

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Contents WH Report No -915173A Retain These Instructions For Future ReferenceTable of Contents Clearances and Height Requirements Typical InstallationPrecautions IntroductionLocation of Fireplace Assembly OutlineChimney Height Chase EnclosureClearances Installing the FireplaceAssembly Steps PRE-INSTALLATION NotesTop View Fireplace SpecificationsFront LBC Shown Left Side Right SideFTF10 Framing SpecificationsInstalling the Chimney System For Canadian Installations, Proceed with Steps 6 throughChimney 30 Offset Through Floor 8d nails when completely installedOr Ceiling For Canada Only12 to 12/12 Roof Pitch Model Flat to 6/12Multiple Terminations TEN Foot Rule SummaryFTF10 Chimney Component Calculations FTF10-CT2 Termination Special Offset InstructionsOffset Calculations FTF10-CT1 TerminationInches FTF10 Vertical Elevation ChartNumber Of FTF10 Chimney OnlyInstalling Offsets FTF10 Offset Elevation ChartFirst, review the Offset Elevation Chart and for reference Optional Equipment Considerations Fireplace Finishes Cold Climate InsulationOpening Width Hearth Extension DimensionsMethods of Determining Hearth Extension and Wall Shield TL = minimum thickness of listed materialValue = 1/k = r x thickness of material used Finish to Your TasteRM = rM x TS = 0.05 x 3/4 = There are a wide variety of finished looks forInstallation Components 850,003M REV. G 01/2010 Installation ComponentsOrange, CA
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