This Architectural Drawing of AutoCAD 2d drawing is Fire detail section. The hearth is built out of a fireproof material, such as bricks, and extends out beyond the fireplace. The surround protects the walls around the fireplace and is often topped by a decorative mantel, perfect for hanging Christmas stockings or holding family pictures. Masonry fireboxes shall be constructed of SOLID masonry units, hollow masonry units grouted SOLID, stone or concrete. The minimum thickness of back and side walls shall be 8 inches of SOLID masonry. The firebox of a concrete or masonry fireplace shall have a minimum depth of 20 inches. For more details and information download the drawing file.