Definition of combustible construction?

[Bagge]

I am in doubt weather or not a trapezoid construction as shown in the attached picture should be categorised as obstructed combustible. What would you think? And where would I be able to find a list of definitions for combustible materials?

 

[cdafd]

Per the building code the project was designed under, or NFPA 13 if sprinkler question.

OK what am I missing, I know it is early. I see concrete and metal.

Are you asking if the cieling is obstructed or unobstructed????

 

[Bagge]

Sorry, NFPA13 sprinkler question.

The reason I ask, is because of the trapezoid steel. In case of a fire, there is a risk that the steel will collapse. I'm in doubt if the trapezoid therefore could be categorised as combustible in the NFPA13 code.
And how would you categorise the construction shown in the picture?

 

[stookeyfpe]

It appears as a parrallelogram to me but it may be the camera angle.

While the term pocket ceiling is not defined in NFPA 13, this appears to be case where I would evaluate the design based on Section 8.6.7.1 of the 2002 edition.

 

[cdafd]

look at 3.3.14 and 3.3.16

 

[cdafd]

look at 3.3.14 and 3.3.16

sorry nfpa 13 2002

 

[DonPhillips]

To find the definition of combustible, start in the building code that references NFPA 13. What I see in the photo appears to be IIB, which is noncombustible construction.

Don Phillips

http://worthingtonengineering.com