Monessen Hearth BWBC500MHB, BWBC400MHB Chimney Installation, Elbow Installation, Elbow Supports

CHIMNEY INSTALLATION

ELBOW INSTALLATION

The following are important points that should be observed when installing elbows on the fireplace.

1.Securely nail down all four (4) support straps to the surround- ing structure of all elbows not installed directly on top of the fireplace.

IMPORTANT: Use a minimum of two (2) 8-penny nails per strap. This allows the support strap to carry the weight of the chimney above the elbow and prevents this weight from break- ing the elbow or chimney sections apart.

2.Do not use elbows in any combination that inclines the chimney more than 30° from vertical. See Figure 16.

3.The minimum height of the fireplace and chimney system when using 1 pair of elbows is 13'

Support Straps

Air Inlet Pipe

30° Elbow Flue Pipe

Figure 16 - Elbow Supports

SC Chimney

Cap

Storm Collar

612 Flashing

Roof

“S” Series

Chimney

Components

Maintain 2"

Minimum Air Space

Clearance to

Combustibles

SVTR

Firestop

Thimble

(0°-15° Pitch)

SE30

Elbows

4.Inclined portions of chimney are often used as stor- age. Enclose the inclined portions of chimney that pass through living spaces to avoid contact with and possible damage to chimney. Maintain minimum air space of 2" between chimney and enclosing. See Figure 17.

5.The length of inclined portion of chimney between elbows must not exceed 6' if it is not supported.

The length of inclined portion of chimney between elbows must not exceed 20' if it is supported every 6' with metal support straps.

6.When enclosing the elbows and inclined portions of the chimney, enclosing materials must be installed vertically to maintain the required 2"minimum air space clearance to the chimney at the extremities of the offset. It is best that enclosing material not follow inclined portions of chimney.

Figure 17 - Typical Chimney Offset Installation

61D0087 17