Chimneys supporting framing members

Heating · Masonry Chimneys · printed page 165 (PDF page 166)

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Supporting Framing Members Framing – Members Supported by Chimneys

Text in the illustration

chimney
floor joist
smoke chamber
firebox
fireplace
12" of solid masonry
framing members should not rest in or on chimneys unless there is at least 12 inches of solid masonry between the wood framing member and the flue
cross section through chimney

Generated explanation

The illustration shows a cross section through a masonry fireplace and chimney, including the firebox, smoke chamber, and adjacent floor joists. An upper wood floor joist bears on a projecting masonry course at the chimney. A circular enlargement shows 12 inches of solid masonry separating the joist end from the flue. The annotation states that framing members should not rest in or on chimneys unless at least this thickness of solid masonry separates the wood framing from the flue.

Components

masonry chimney chimney flue flue liner fireplace firebox smoke chamber floor joists projecting masonry bearing course

Materials

brick mortar wood concrete

Related illustrations

0961

Lateral support for masonry chimneys

· p. 163

Two house elevations compare lateral support conditions for exterior masonry chimneys on a wood frame house and a masonry or masonry veneer house. On the wood frame house, a dimension arrow identifies the laterally unsup