• Welcome to The Building Code Forum

    Your premier resource for building code knowledge.

    This forum remains free to the public thanks to the generous support of our Sawhorse Members and Corporate Sponsors. Their contributions help keep this community thriving and accessible.

    Want enhanced access to expert discussions and exclusive features? Learn more about the benefits here.

    Ready to upgrade? Log in and upgrade now.

Wood Furring Strips on Ceiling Type I & II Construction

See IBC Section 603.1 #18 which references to Section 803.13

803.13 Application of Interior Finish Materials to Fire-Resistance-Rated or Noncombustible Building Elements
Where interior finish materials are applied on walls, ceilings or structural elements required to have a fire-resistance rating or to be of noncombustible construction, these finish materials shall comply with the provisions of this section.

803.13.1 Direct Attachment and Furred Construction
Where walls and ceilings are required by any provision in this code to be of fire-resistance-rated or noncombustible construction, the interior finish material shall be applied directly against such construction or to furring strips not exceeding 1 3/4 inches (44 mm), applied directly against such surfaces.

803.13.1.1 Furred Construction
If the interior finish material is applied to furring strips, the intervening spaces between such furring strips shall comply with one of the following:
  1. Be filled with material that is inorganic or noncombustible;
  2. Be filled with material that meets the requirements of a Class A material in accordance with Section 803.1.1 or 803.1.2; or
  3. Be fireblocked at a maximum of 8 feet (2438 mm) in every direction in accordance with Section 718.
 
Ty J. said:
See IBC Section 603.1 #18 which references to Section 803.13

803.13 Application of Interior Finish Materials to Fire-Resistance-Rated or Noncombustible Building Elements
Where interior finish materials are applied on walls, ceilings or structural elements required to have a fire-resistance rating or to be of noncombustible construction, these finish materials shall comply with the provisions of this section.

803.13.1 Direct Attachment and Furred Construction
Where walls and ceilings are required by any provision in this code to be of fire-resistance-rated or noncombustible construction, the interior finish material shall be applied directly against such construction or to furring strips not exceeding 1 3/4 inches (44 mm), applied directly against such surfaces.

803.13.1.1 Furred Construction
If the interior finish material is applied to furring strips, the intervening spaces between such furring strips shall comply with one of the following:
  1. Be filled with material that is inorganic or noncombustible;
  2. Be filled with material that meets the requirements of a Class A material in accordance with Section 803.1.1 or 803.1.2; or
  3. Be fireblocked at a maximum of 8 feet (2438 mm) in every direction in accordance with Section 718.
Click to expand...

why not use metal hat channels?
 
How are wood and metal strips treated differently? Seems like both need to meet the 3 requirements:
  1. Be filled with material that is inorganic or noncombustible;
  2. Be filled with material that meets the requirements of a Class A material in accordance with Section 803.1.1 or 803.1.2; or
  3. Be fireblocked at a maximum of 8 feet (2438 mm) in every direction in accordance with Section 718.
 
e hilton said:
How are wood and metal strips treated differently? Seems like both need to meet the 3 requirements:
  1. Be filled with material that is inorganic or noncombustible;
  2. Be filled with material that meets the requirements of a Class A material in accordance with Section 803.1.1 or 803.1.2; or
  3. Be fireblocked at a maximum of 8 feet (2438 mm) in every direction in accordance with Section 718.
Click to expand...
Same requirements, just different materials.
 
e hilton said:
Ok. In #3 Tim says why not use metal hat channels, with the implication it would make a difference in codevapplication.
Click to expand...
Yeah, I thought the same... but per my reading of 803.13.1.1, there is no differentiation, thus the same implications whether wood or hat channel.
 
Ty J. said:
Yeah, I thought the same... but per my reading of 803.13.1.1, there is no differentiation, thus the same implications whether wood or hat channel.
Click to expand...

Isn't hat channel, hat channel and wood furring strips are 'furring' strips? The section is for furring strips, not metal framing.
(devil's advocate)
 
Ty J. said:
803.13.1.1 Furred Construction
If the interior finish material is applied to furring strips, the intervening spaces between such furring strips shall comply with one of the following:
  1. Be filled with material that is inorganic or noncombustible;
  2. Be filled with material that meets the requirements of a Class A material in accordance with Section 803.1.1 or 803.1.2; or
  3. Be fireblocked at a maximum of 8 feet (2438 mm) in every direction in accordance with Section 718.
Click to expand...

It says 1 of the following, #1 says in organic or noncombustible, IMHO hat channel is noncombustible so no fireblocking or filling cavities is required. Be the same as a metal stud wall with nothing in it. AHH my bad does say filled with matierial. We all miss things once in a while. :eek:
 
You must log in or register to reply here.
Back
Top