IBC 2015 Table 508.4 - what am I missing?

[Paul Legan]

Hi all, new member here, looking forward to contributing to the forum.

I thought table 508.4 showed required occupancy separations based on occupancy hazard.

So a B-occupancy and F-1 (Moderate-hazard factory industrial) requires no separation.

But a B-occupancy and F-2 (Low-hazard factory industrial) requires 1-hour (sprinklered) or 2-hour (non-sprinklered)

How does that make sense? B occupancy and moderate hazard, no separation. B occupancy and low hazard, 1 or 2 hr separation.

Any thoughts?
Thanks, Paul

 

[RLGA]

Welcome to the forum!

Separation is based on fire load. A Group B occupancy tends to have a high fire load considering all the furnishings and paper products it encloses. Group B and Group F-1 occupancies are considered to have comparable fire loads; thus, there is no need to separate the two. A Group F-2 occupancy has a low fire load; it, therefore, needs to be protected from the higher fire load within a Group B occupancy.

 

[Paul Legan]

Welcome to the forum!

Separation is based on fire load. A Group B occupancy tends to have a high fire load considering all the furnishings and paper products it encloses. Group B and Group F-1 occupancies are considered to have comparable fire loads; thus, there is no need to separate the two. A Group F-2 occupancy has a low fire load; it, therefore, needs to be protected from the higher fire load within a Group B occupancy.

Ah, that makes sense, I guess I had in my mind that a F occupancy in general was a higher hazard than a B, but that's not necessarily the case. Thanks!

 

[cda]

Welcome

What part of Colorado ??

I went to Salida this past year and loved it!!!

 

[cda]

Ah, that makes sense, I guess I had in my mind that a F occupancy in general was a higher hazard than a B, but that's not necessarily the case. Thanks!

Don’t you just love codes??

 

[my250r11]

Works the same with the S occ. also

 

[SCBO1]

Don’t you just love codes??

cda, there's only a "LIKE" button, you and jar don't give us any other choice

 

[cda]

cda, there's only a "LIKE" button, you and jar don't give us any other choice

Hay

We are not stupid

 

[Paul Legan]

Welcome

What part of Colorado ??

I went to Salida this past year and loved it!!!

Salida is a great little town, I'm glad you liked it. I'm out of Boulder.

Thanks for the help, all.

 

[Yikes]

Paul - a fly fisherman?

 

[Paul Legan]

Paul - a fly fisherman?

Oh yeah!

 

[fatboy]

You need to get involved with the Colorado Chapter of the ICC........some really, really smart code folks there.........good resource.

https://coloradochaptericc.org/

 

[north star]

@@@

" cda, there's only a "LIKE" button, you and jar don't give us any other choice "

PC, what other choice are you wanting, and have you sent a PM to Jeff with your thoughts ?
@@@

 

[cda]

Oh yeah!

Forum Road trip !!!

 

[SCBO1]

@@@
PC, what other choice are you wanting, and have you sent a PM to Jeff with your thoughts ?
@@@

A "I love you man!", button
A Dislike button,
Maybe a WWJD (What Would Jar Do?) button
Ask cda button?

Just messing with cda and Jar,
It's fine the way it's setup!

 

[cda]

"Dilly Dilly"

 

[mark handler]

A "I love you man!", button
A Dislike button,
Maybe a WWJD (What Would Jar Do?) button
Ask cda button?

Just messing with cda and Jar,
It's fine the way it's setup!

A No comment or "I blocked your A** button

 

[SCBO1]

"That's how they do it in that other jurisdiction!" button.

"Dilly Dilly! button,good one cda

 

[Paul Legan]

You need to get involved with the Colorado Chapter of the ICC........some really, really smart code folks there.........good resource.

https://coloradochaptericc.org/

Thanks for the tip! I'll check it out.

 

[JBI]

Table 508.4 is really used to provide required separations in order to allow the separated mixed use provisions of Section 508 to be properly applied, that is the sum of the ratios method as opposed to the 'most restrictive' provisions for non-separated occupancies. It's really about determining allowable building area.

 

[cda]

"That's how they do it in that other jurisdiction!" button.

"Dilly Dilly! button,good one cda

Well since we can’t advertise

 

[SCBO1]

We took the Budweiser brewery tour in St. Louis, at the end you got to sample one of their brews. While tasting a beer, they played several of their commercials, it was amazing how many commercials they made and how many you remembered. The "I love you man!" was my favorite, but the frogs had their day too.

I think this threads been hi-jacked!

 

[cda]

We took the Budweiser brewery tour in St. Louis, at the end you got to sample one of their brews. While tasting a beer, they played several of their commercials, it was amazing how many commercials they made and how many you remembered. The "I love you man!" was my favorite, but the frogs had their day too.

I think this threads been hi-jacked!

Yep went to Sea World in San Diego once a few years ago, and in their hospitality area, they had about six stands giving out FREE Bud, and you would just make the rounds, and the servers did not care if you quad dipped a few times!!

 

[sergoodo]

Welcome to the forum!

Separation is based on fire load. A Group B occupancy tends to have a high fire load considering all the furnishings and paper products it encloses. Group B and Group F-1 occupancies are considered to have comparable fire loads; thus, there is no need to separate the two. A Group F-2 occupancy has a low fire load; it, therefore, needs to be protected from the higher fire load within a Group B occupancy.

Moderate-Hazard factory Industrial, Group F-1
Low-Hazard factory Industrial, Group F-2

Is 'hazard' related to fire load?
Is a low hazard > moderate hazard?
Is a change of occupancy from F-2 to F-1 a change to a less hazardous occupancy?

Thanks for any enlightenment!