what is the building code for fireplace surrounds (non combustible in Dallas?

Answer 1

Ok, Lets try to take this in steps.
1. Tke IRC code and it's son the CABO code and there brother
the BOCA code all state the same thing in different words.
The framing around fireplace and chimney shall have a 1"or2" air
space, but, I think you want to know about trim?
2.When masonary chimneys are contructed as part of masonary or concrete walls, combustible materials shall not be in contact with the masonary or concrete wall less than12 inches(306 mm) from the inside surface of the nearest flue lining.
3. Exposed combustible trim and the edges of sheathing materials,such as wood,siding and flooring shall be permitted to abut the masonary side walls provided such combustible trim or or sheathing is a minimum of 12" from the inside surface of the nearest flue lining. Combustible material and trim shall not overlap the corners of the chimney by more than 1" (25.4mm).
4. Distance (in front) from top of the opening to throat 8".
5. Fireplace lintel (masonary support across the top of opening
to throat) must be noncombustible ( steel is always used).
6.Hearth extension(each side of opening) min of 8", 12" if fireplace
opening > 6 sg.ft.
7. Hearth extension (front of opening) 16" if opening<6 sg. ft.
20" if opening >6 sg.ft.
Don't forget your exterior air intake opening to the fire box.
This is just for information and may vary because all States do
adopt their own admendment. Check with Bld Inspector.
Hope this helps but there is alot more to your fireplace.

Answer 2

Dallas Building Code

Answer 3

best to ask the city of dallas, usually it is 12 inches non-combustable material, sides and top, front floor might be 18 inches.

Answer 4

codes vary from state to state county to county. check with the local county for the up to date codes.