Fire insulate steel beams

[GHGH]

Of course, fire protection is needed in a residence as well. BBR applies there too

 

[Cpt_NoPants]

Judging from the pictures, you have a Br3 building and therefore you do not need to protect the load-bearing structure against fire (this is called R0 in BBR). There could be other factors involved, such as if you have a rented apartment within its own fire compartment, but assuming it is just one residence in the building and no fire compartment boundaries.

 

[Reeeeflex]

Judging from the pictures, you have a Br3 building, and then you do not need to protect the load-bearing structure against fire (it's called R0 in BBR). There may be some other factors that come into play, such as if you have a rental apartment within its own fire compartment, but I assume it's just a residence in the building and no fire compartment boundaries.

Yes, it is a single-family house.

Björn C

 

[Matti_75]

Of course, fire protection is needed even in a residence. BBR applies there too

No, it's not needed since the entire building, including the conservatory, is classified as a fire compartment!!

 

[Cpt_NoPants]

Yes, it's a single-family house.

Björn C

Then you don't need to protect the structural framework against fire

 

[Noseone]

Would be fun with pictures of the construction!

 

[GHGH]

Once again, you indeed have a Br3 building, and according to the current EKS (11), the main system in a Br3 building that accommodates occupancy class 3 should be assigned fire safety class 2, i.e., R15. For the curious, this can be found in EKS 11, chapter 1.1.2, §2 table C-5.

But as mentioned, ask the designer about load utilization and if it can be done without extra protection, it is often not very high utilization due to other parameters that require overdimensioning, e.g., deflection.

 

[Matti_75]

Again, you do indeed have a Br3 building, and according to the current EKS (11), the main system in a Br3 building containing operational class 3 should be assigned to fire safety class 2, i.e., R15. For the curious, this can be read in EKS 11, chapter 1.1.2, §2 table C-5.

But as mentioned, ask the designer about load utilization and if it can work without extra protection, it often isn't very high utilization due to other parameters that require over-dimensioning, e.g., deflection.

This applies when there is more than one residence in the building. See below

 

[GHGH]

Fixed fire compartments are not the same as fire safety class for load-bearing structures, even if we don't have fire compartments, the requirement for the load-bearing structure is R15. If we had several residential apartments separated as separate fire compartments EI60, the requirement for load-bearing structures stabilizing fire compartment boundaries would have been R60.

 

[witten]

Again, you indeed have a Br3 building, and according to the current EKS (11), the main system in a Br3 building housing occupancy class 3 should be classified as fire safety class 2, i.e., R15. For the curious, this can be read in EKS 11, chapter 1.1.2, §2, table C-5.

But as mentioned, ask the designer about load utilization and if it can go without extra protection, it is often not so highly utilized due to other parameters requiring over-dimensioning, such as deflection.

Exactly so. For R15, one can often manage without fire protection by reading the nomogram for unprotected steel under the standard fire curve. (However, if it is R60, this usually doesn’t work, as there is approximately only a small percentage of the steel's strength remaining then).

 

[ÉlPon]

Again, you correctly have a Br3 building, and according to the applicable EKS (11), the main system in a Br3 building that houses occupancy class 3 should be assigned fire safety class 2, i.e., R15. For the curious, this can be read in EKS 11, Chapter 1.1.2, Section 2, Table C-5.

But as mentioned, ask the designer about the load utilization and if it can go without extra protection; it is often not very high utilization due to other parameters that require over-dimensioning, such as deflection.

I have a 7m HEB-220 where it states "utilization rate beam 40% ultimate limit". Can I manage without fire protection then?

 

[ÉlPon]

Something like that, yes. For R15, you can often manage without fire protection by reading off a nomogram for unprotected steel under the standard fire curve. (However, if it's R60, this usually doesn't work as there is roughly only a few percent of the steel's strength left then).

Do you have an example or a link to a table to look at? I need to know if my steel beam needs to be protected to meet R15 or if I can avoid it. Breakage limit 40%.