A2

C2

B2

A1

B1

C1

A2

C2

B2

A1

B1

C1

Figure 36

Joints

FTF13 OFFSET ELEVATION CHART

 

A

B

 

FTF13-ES30

 

Number of FTF13

A

B

Offset

Height

Offset/Return

FTF13-S4

Chimney Sections

Offset

Height

 

 

 

 

 

 

 

 

 

(Inches)

(Inches)

Elbow Set

Stabilizer

12"

18"

36"

(mm)

(mm)

 

 

 

 

 

 

 

 

 

 

 

4

 

15

³⁄₄

1

0

0

0

0

102

400

9

 

24

¹⁄₂

1

0

1

0

0

229

622

12

 

29

³⁄₄

1

0

0

1

0

305

756

14

¹⁄₄

33

¹⁄₂

1

0

2

0

0

362

851

17

¹⁄₄

38

¹⁄₂

1

0

1

1

0

438

978

20

¹⁄₄

43

³⁄₄

1

0

0

2

0

514

1111

21

 

45

¹⁄₄

1

0

0

0

1

533

1149

22

¹⁄₄

47

¹⁄₂

1

0

2

1

0

565

1207

25

¹⁄₄

52

¹⁄₂

1

0

1

2

0

641

1334

26

¹⁄₄

54

¹⁄₄

1

0

1

0

1

667

1378

28

¹⁄₄

57

³⁄₄

1

0

0

3

0

718

1467

29

¹⁄₄

59

¹⁄₄

1

0

0

1

1

743

1505

31

¹⁄₄

63

 

1

0

2

0

1

794

1600

32

¹⁄₂

65

 

1

0

4

1

0

826

1651

34

¹⁄₄

68

¹⁄₄

1

0

1

1

1

870

1734

36

¹⁄₄

71

³⁄₄

1

0

3

0

1

921

1822

37

¹⁄₄

73

¹⁄₄

1

0

0

2

1

946

1861

38

¹⁄₄

75

 

1

0

0

0

2

972

1905

39

¹⁄₄

77

 

1

0

2

1

1

997

1956

41

¹⁄₂

80

¹⁄₂

1

0

1

4

0

1054

2045

43

¹⁄₄

83

³⁄₄

1

0

1

0

2

1099

2127

44

¹⁄₂

85

³⁄₄

1

0

3

1

1

1130

2178

45

¹⁄₄

87

¹⁄₂

1

0

0

3

1

1149

2223

46

¹⁄₄

89

 

1

0

0

1

2

1175

2261

48

¹⁄₄

91

¹⁄₂

1

0

2

0

2

1226

2324

49

¹⁄₂

94

¹⁄₂

1

0

1

5

0

1257

2400

51

¹⁄₄

97

³⁄₄

1

0

1

1

2

1302

2483

54

¹⁄₄

103

 

1

0

0

2

2

1378

2616

55

¹⁄₄

104

¹⁄₂

1

0

0

0

3

1403

2654

56

¹⁄₂

106

¹⁄₂

1

0

2

1

2

1435

2705

59

¹⁄₂

111

³⁄₄

1

0

1

2

2

1511

2838

61

³⁄₄

116

 

1

1

1

0

3

1568

2946

64

³⁄₄

121

¹⁄₄

1

1

0

1

3

1645

3080

67

 

124

³⁄₄

1

1

2

0

3

1702

3169

69

 

127

³⁄₄

1

1

1

3

2

1753

3245

70

 

130

 

1

1

1

1

3

1778

3302

73

 

135

¹⁄₄

1

1

0

2

3

1854

3435

75

 

138

³⁄₄

1

1

2

1

3

1905

3524

79

 

145

¹⁄₂

1

1

1

0

4

2007

3696

80

¹⁄₄

147

¹⁄₂

1

1

3

1

3

2038

3747

82

 

150

³⁄₄

1

1

0

1

4

2083

3829

87

 

159

¹⁄₂

1

1

1

1

4

2210

4051

 

 

 

 

 

 

 

 

 

 

 

Chimney

 

 

 

 

 

 

Required

At

6'

 

 

 

 

 

 

Past

Section

 

 

 

 

 

4'

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Screws

Joint

 

 

 

 

 

 

 

 

Offset

Every

 

 

 

 

 

Required 6'

In

of

 

No. 8 x 1/2" SMS

 

6'

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Screws

For

First

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No

Joints

 

 

 

 

 

 

 

 

 

Figure 37

INSTALLING OFFSETS

First, review the Offset Elevation Chart and see Figure 39 for reference.

Step 1. Determine the offset distance where chimney is to pass through the first ceiling- dimension “A.” To find this point on your ceil- ing, first determine the center point for a vertical chimney following the instructions for vertical installation.

Measure height to the ceiling from the top of fireplace-dimension “B.” Use the appropriate Offset Elevation Chart to find dimension “A.” Mark point where you will drive your nail to show the center point for your offset ceiling cut.

Step 2. Proceed by using the Straight Up Installation Instructions for cutting and framing ceiling and roof openings.

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

13