Offset deviation (cont’d), Warning, Roof support (dtc-rs) – M&G DuraVent DuraTech® Canada User Manual

Page 9: Installation instructions

OFFSET & RISE CHART MODEL DURATECH

CANADA (DTC)

(5" @ 10")

Figure 12

WARNING

A support must always be installed right above each

offset (two elbows) to support the chimney above the

offset.

RISE

OFFSET

Install the remaining chimney as described in the instructions for the

Interior Straight installation.

INSTALLATION CALCULATIONS
Determine the offset required in view of the obstacles that must be avoided

(see figure 12). Refer to table 8 below to determine the elbows required

as well as the insulated length needed.

ANGLE

DIA.

INCHES

ONE LENGTH BETWEEN ELBOWS

TWO LENGTHS BETWEEN ELBOWS

8 & 48

12 & 48

18 & 48

24 &48

36 & 48 48 & 48

15°

5" @ 10"

Offset

3-5/16

4-5/16

5-7/8

7-7/16

10-1/2

13-5/8

15-3/8

16-7/16

19-1/2

22-5/8

25-3/4

Rise

15-11/16

19-9/16

25-3/8

31-3/16

42-3/4

54-3/8

60-15/16

64-13/16

70-9/16

76-3/8

99-9/16

30°

5" @ 10"

Offset

7-7/16

9-7/16

12-7/16

15-7/16 21-7/16

27-7/16

30-13/16

32-13/16

35-13/16

38-13/16

44-13/16

50-13/16

Rise

23-1/2

28-11/16

33-7/8

44-1/4

54-11/16

60-9/16

69-1/4

74-7/16

84-13/16

95-1/4

45°

5" @ 10"

Offset

10-5/16

13-3/16

17-3/8

21-5/8

30-1/8

38-5/8

43-7/16

46-1/4

50-1/2

54-3/4

63-1/4

71-11/16

Rise

17-13/16

20-5/8

24-7/8

29-1/8

37-5/8

46-1/8

50-15/16

53-3/4

62-1/4

70-3/4

79-3/16

Table 8

OFFSET DEVIATION (CONT’D)

ROOF SUPPORT (DTC-RS)

The roof support has three possible uses:
It may be used to support a chimney from the roof. It adjusts to any

roof pitch.
It may be used on a floor, ceiling or roof above an offset to support the

chimney above the offset.
It may be used on a floor, ceiling or roof as a supplementary support when

the chimney height exceeds that of the primary support. (See maximum

length height supported, page 3).

INSTALLATION INSTRUCTIONS

With the chimney extending through the hole in the roof, ceiling or floor

and the radiation shield in place, proceed as follows (Refer to figure 15

for visual references):

Step 1. Assemble the support collar to fit your chimney diameter, as

described on the instruction sheet supplied with the support.

Step 2. Slip the support down over the stainless steel chimney until its

brackets rest on the roof or floor. Tighten the collar around the

chimney, then secure it by screwing the four 1/2" metal screws

(supplied) through the holes located on each side of the collar

bolts and into the chimney (Figure 32).

Step 3. Center the chimney and nail or screw the support to the roof or

floor using (8) - 2-1/2" nails or (8) N°8 - 1-1/4" wood screws.

(figure 14).

Figure 14

Figure 13

SCREWS

RADIATION SHIELD

CONNECTOR SUPPORT

(DTC-FRSCS)

RADIATION SHIELD

CONNECTOR

(DTC-RSCI)

SCREWS

Figure 15

RAIN CAP

(DTC-VC)

STORM COLLAR

(DTC-SC)

FLASHING

(DTC-FF)

ROOF SUPPORT

(DTC-RS

2 in. MIN

6 in. MIN