Masonry Fireplace Firebox Dimensions

The size of fireplaces will vary but masonry fireboxes should be at least four inches thick and 20 inches deep.

Masonry fireplace firebox dimensions. Then he draws a centerline and measures out 21 in. The throat shall not be less than 8 inches 203 mm above the fireplace opening. The throat opening shall not be less than 4 inches 102 mm deep. 2 generally ranges from 6 to 60 sq in.

This article series provides information about masonry fireplaces. The technical notes address all the necessary features in a brick fireplace and their relationship to one another. Unlike traditional masonry fireplaces most factory built fireplaces are metal and come from the factory as complete units with a firebox a specific chimney system and all miscellaneous parts. 400 mm in front of the fireplace opening.

Once the area was tented it was time to layout the base of the firebox on the slab. In each direction to mark the 42 in. Brickwork should be strong enough to hold any decorative stone or other materials used on the exterior of the fireplace. To provide adequate draft and safe venting of combustion products the chimney flue for a fireplace has to be adequate in size or cross sectional area.

Typical firebox assembly. Oversized models available in 60 and 72 openings with dual chimney systems. The firebox of a concrete or masonry fireplace shall have a minimum depth of 20 inches 508 mm. Thus the best performance is generally achieved when the inlet is located near the front of the fireplace within the combustion chamber.

The air inlet damper assembly area as shown in fig. Prefabricated fireplaces factory built or prefabricated fireplaces are relative newcomers to the fireplace scene. Our conventional model is compatible with either masonry chimneys or ul 103 metal chimney systems. Details are provided in technical notes 19a while proper chimney construction is outlined in technical notes.

He draws a line along the back to establish the 20 in. Fireplace flue size specifications relation of fireplace size to flue opening dimensions table of required chimney flue size and flue dimensions for masonry fireplaces. 200 mm on each side of the fireplace opening and 16 in. 3870 to 38 700 mm2 depending on the other components in the exterior air supply system.

Model building codes also require that the hearth extend a minimum of 8 in. Mike begins by snapping a chalkline to mark the front face of the fireplace. Hearth may be a reinforced brick masonry cantilever. Traditional style firebox with angled back wall straight back wall option also available.

Fireplace design details checklist sides of firebox must pinch in towards back back wall of fireplace must be straight up for first 12 inches back wall must slope towards front for remainder of height width and height of opening must come from table below smoke shelf up above fireplace must be sized.