If you ve been researching class a chimney pipes you ve probably heard of the 3 2 10 foot rule numerous times.
Ibc chimney height above roof.
Both above the flat roof and 2 feet above the point at which a horizontal line from the chimney would touch the highest portion of the nearest roof.
Specifications aren t there to merely cause you problems.
This rule refers to the proper height of the chimney pipe above the roof.
The ontario building code height of chimney flues 9 21 4 4.
The international code council icc is a non profit organization dedicated to developing model codes and standards used in the design build and compliance process.
The 3 2 10 rule the chimney opening above the roof of a sticks and bricks house should be 3 feet above the roof line or 2 feet above any part of the building within 10 whichever is higher.
For gas vents or a type l vent this distance above the roof surface must be at least 2 ft 0 61m.
They intend to make sure that the chimney draws properly and that a fire hazard does not occur.
The top of the chimney should be at least 3 ft 0 92 m above the roof surface.
The 10 foot rule explains the clearance you need.
Explained the chimney pipe must be a minimum of three feet above the roof but also two feet taller than anything within ten feet.
For most small structures like small cabins and tiny homes the tallest part of the structure is within 10 of the chimney.
And at least 2 higher than any portion of a building within 10.
Chimneys shall extend not less than 2 feet 610 mm higher than any portion of a building within 10 feet 3048 mm but shall be not less than 3 feet 914 mm above the highest point where the chimney passes through the roof.
Height of chimney flues 1 achimney flue shall extend not less than a 900 mm above the highest point at which the chimney comes in contact with the roof and b 600 mm above the highest roof surface or structure within 3 m of the chimney.
Most wood stove and factory built fireplace manufacturers and local building codes will require that the chimney must extend at least 2 feet above any portion of any structure within 10 feet measured horizontally and must extend at least 3 feet above the highest point of its roof penetration.
The chimney must extend at least 3 above the highest point where it passes through a roof.
When a chimney is not adequately supported by ties or securely restrained in any way its height h when measured from the highest point of intersection with the roof surface gutter and so on should not exceed 4 5w provided the density of the masonry is greater than 1500 kg m 3 that is.
This specification makes sure steep roof slopes are cleared.
