Smoke chamber forms must be removed

Heating · Wood Burning Fireplaces · printed page 189 (PDF page 190)

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Book index entries

Smoke Chamber – Forms Must be Removed Wood Fireplaces

Text in the illustration

chimney
smoke chamber
damper
firebox
floor joist
cross section through chimney
forming boards are used to provide a smooth mortar surface over corbelled bricks
while smooth walls are desirable, all forms should be removed when the mortar has set

Generated explanation

A cross section through a masonry fireplace and chimney shows the firebox, damper, and tapered smoke chamber leading to the chimney flue. Corbelled bricks form the sloping side of the smoke chamber, with forming boards used to create a smooth mortar surface over the bricks. The annotation states that all forms must be removed after the mortar has set, even though smooth chamber walls are desirable. The lower section shows the masonry support beneath the fireplace and an adjacent wood floor joist.