DuraVent DuraChimney II 설치 지침 매뉴얼 - 페이지 13

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1. Clearances | Permits | Applications | Equipment | Installation Notes

clearance between the chimney and any

combustible materials. Interior enclosures

may be constructed with standard framing and

sheathed with sheetrock or plywood. Use a Wall

Strap or Stabilizer at least every 8 feet to maintain

a minimum of 2 inches of air space between the

chimney and combustible materials.

OFFSET ELBOW INSTALLATION

A 30° elbow (measured from the vertical) is

the largest that can be used in an offset. A

30° elbow may not be combined with another

elbow to make a steeper offset (e.g. two 30°

elbows are not allowed to be put together to

form a 60° elbow). Avoid elbows if possible. A

totally vertical chimney is more efficient. When

elbows are necessary to avoid obstructions

such as rafters, ridgepoles, or joists, you

are only allowed to use 1 pair of elbows in

any one chimney system. refer to Offset

Chart in Table 3 (page 14) to determine the

pipe sections needed for the offset desired.

horizontal runs of chimney violate building

code and are not allowed.

1. Attach Elbows: Attach elbow to Chimney

Section or other elbow by mating the male

and female ends with each other and

using the (4) sheet metal screws provided.

Attach one elbow to the Chimney Section

below, and align it for the offset. Determine

the required offset length and attach an

appropriate length (or lengths) of Chimney

Section(s) above the elbow. Attach the

second elbow above the Chimney Section to

complete the offset (Fig. 17).

2. Secure Offset: Use an elbow Strap to

secure the offset. Secure the elbow Strap's

band to chimney around the upper portion of

the top elbow, then tighten the nut and bolt

until the clamp is firm. Wrap the Elbow Strap

end over an adjacent joist or rafter and secure

it with at least two 8-penny nails or #8, 1-1/2"

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screws. Add additional elbow Straps for each

section of chimney in the offset (Fig. 18).

every chimney section in the offset must be

supported. Do not add more Chimney Sections

until the elbows and the offset are supported.

Be sure that the chimney above the second

elbow remains vertical.

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ELBOW STRAP

Figure 17

1 PER

SECTION

ELBOW STRAP

Figure 18

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30° OR 15°

ELBOW

ELBOW STRAP