We have a rehab of a two story with a walk out basement where they are going to expand the basement level and make it mercantile with the two upper floors being R-2.

This is Type V-B construction and they are proposing to 1-hour horizontal to separate the mercantile from the R use. They are wanting to use the standpipes as their sprinkler risers.

My question is three-fold:
1. Can they sprinkler the entire building with 13R, or
2. Can they omit sprinklers completely in the mercantile if they separate from the R use by 1-hour (the mercantile by itself would not require sprinkler protection,
3. Can they sprinkler the mercantile with 13 and the R use 13R without a rated separation?

I am an AHJ and only wanting to require what the Code requires. I am having trouble deciphering the requirements.

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Architect here with a fire code question. We have a fully sprinklered building (ESFR), of Type II-B, tilt concrete construction.

The fire pump room is located on an exterior wall, and the only door into the pump room is from the exterior. We have 1-hr rated construction separating the fire pump room from the rest of the building.

The fire marshal is telling us that the exterior wall and door also have to be rated. I responded by pointing out the fire pump is required to be protected from the surrounding building, and that it does not need to be protected from the exterior, so exterior wall and door should not have to be rated.

Fire marshal disagrees and pointed to NFPA 20 4.14.1.1.2. That section does not specifically state that separation is required from the rest of the building, although Section 4.14.1.1.1 right before it does make that distinction, just like IBC/IFC do.

We have solid concrete walls that are inherently fire rated construction, so typically I would just say ok and label them rated. The issue is we are required to have ventilation in the pump room per NFPA 20, so we have a makeup air louver in the exterior wall. If we rate the wall, then my understanding is we will have to put a fire/smoke damper on that louver, which is added cost and unnecessary in my opinion.

Is your understanding that all walls have to be rated as the fire marshal is saying, or just the walls between pump room and rest of building?

I've done many buildings of this type in multiple states and this is the first time I've been told this. I'd appreciate your insight, thanks.

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Four-story office building wants to shut down five large air handlers nightly. Purpose is to lower energy costs when building is unoccupied. This will cause all fire/smoke dampers (FSDs) to close (the smoke detectors in return ducts need minimum operational air velocity).

The FSDs are mostly original from 1985-1988. Only UL tested for 5000 cycles and no dynamic.

I cannot find a code reference to prohibit this and believe that the FSDs are already near the end of their functional lifespan. Many have been replaced due to bad actuators, binding jack shafts and missing blades.

Anyone know of a code reference to prohibit this use or when a FSD must be replaced?

Thanks in advance.

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We have a project with an air supported dome structure. It's serving around 430,000+ sqft of indoor sports.

However, I am a bit confused with the type of construction this would be clasified as.

As per NFPA 5000 and IBC, an air-supported structure can be Type II-B (000), but wouldn't we be limited on allowable floor area restrictions for the site of the building?

Are there any exceptions to sprinkler protection for a building like this?

I would really appreciate your point of view, thanks in advance.

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We have a multistory hotel building with the rooms opening to an exterior corridor. There is Exterior Insulation Finish System (EIFS) along the walls of the exterior corridor.

NFPA 13 (2022), Section 9.2.3.3 allows omission of sprinklers from exterior exit corridors where the exterior wall of the corridor is at least 50% open and where the corridor is entirely of noncombustible construction.

It seems from research that EIFS is considered combustible and would require sprinkler protection along the exterior corridor.

Has anyone done more research on this or has this come up before for other projects with EIFS in the exterior corridors and ultimately required sprinkler protection?

​Thanks in advance.

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If a stair structure is supporting the fire barriers that enclose the exit enclosure, does the stair structure have to be fire rated as well?

Looking specifically at IBC 2018 Section 707.5.1 and NFPA 101 (2018) Section 7.1.3.2.

If there is a fire inside a stair, the means of egress is no longer usable and at that point are you protecting the interior of the building from the fire inside the exit enclosure?

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UL designs discuss loading-bearing and non-load bearing walls.

I haven't seem many where they discuss when, say, electrical, fire pump, fire alarm panels or other equipment are mounted on the walls.

At what point do you have to consider the objects on the wall and consider the wall as load-bearing?

It may just be a structural question, but my structural contacts have said not to worry but I wanted to hear others opinions. Thank you in advance!

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I am overseeing an NFPA 101, Chapter 43 reconstruction project in an existing storage occupancy that is changing to an industrial/high hazard occupancy.

I am trying to coordinate the means of egress during construction.

Other parts of the building are currently occupied and the new area is less than 50% of the building.

Section 43.7.2.3 requires that the area comply with the applicable new construction chapters of the occupancy. The hazard category per table 43.7.3 leads me to believe this would be a hazard category 1.

The question is: when is the construction area considered to be high hazard?

The contents of the hazardous occupancy will not be present through the entirety of the construction and will only be put in place after the space is ready to be occupied and compliant with all means of egress requirements. During construction, the "high hazard contents room" is just a small room with nothing located inside.

Even with no high hazard contents present until the space is ready to be occupied, does it need to meet the egress requirements of new industrial/high hazard or can it meet the egress requirements of existing for storage?

Thanks.

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I have a new construction 5-story residential (dormitory) being constructed under UFC.

The architect inquired if lobbies need to be provided for the elevators, and, if not, do smoke protection (draft-curtains) need to be provided?

My immediate thought was of course, something needs to be provided. However, when I follow the code track of NFPA 101, it is not exactly clear in comparison to IBC.

The IBC is very clear, Section 3006 regarding the protection of hoistway openings.

Without going through the entire NFPA 101 code-track here, we end up back at NFPA 101 Chapter 8. Section 8.5.3 states a fire barrier can be used as a smoke barrier, provided it meets the requirements of Section 8.5. Hoistway openings, specifically elevator doors are not specifically mentioned in NFPA 101 Section 8.5. The only thing I can point to is Section 8.5.2 Continuity and Section 8.3.5.2 Joint Systems for Fire Barriers.

Other items: The hoistway is to be protected with a 2-hour fire rating, which requires the elevator door to be 1.5 hour rated (Section 8.6.5), and the building is protected throughout with automatic fire sprinklers, including the elevator shaft.

By definition, the building is not considered a high-rise. The hoistway height is ~57 feet.

​What are everyone's thoughts on this?

Thanks in advance.

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We have a situation where we'll have a piece of equipment in one control area that has a closed-use pipe arrangement with oxidizing gases that goes through different control areas. I've gotten conflicting feedback on this.

How do you figure the amount of "in-use" for each control area? 

Here's a sketch of the concept:

The equipment that is using the oxygen is on the fourth floor Control Area 2. The tanks that feed it are (2) 200 CF oxygen tanks that are in the second floor Control Area 1.

Which of the following two scenarios is the proper way to tally up the "in-use" quantity for the fourth floor Control Area 2 when comparing against the Maximum Allowable Quantities (MAQs)?

• Concept #1: The "in-use" amount is only the gas within the equipment itself, and only the gas within the piping to the extent of the control area wall.
• Concept #2: The "in-use" amount is all of the gas within the equipment itself, and all of the gas within all of the piping, and all of the gas within the (2) oxygen tanks which are actively hooked up to it.

 
My initial gut reaction was that the second option is correct, but now I’m not sure. My reasoning being that if there is an event in 4th floor control area 2 that causes a leak or something like that, it’s not going to just leak out what is physically within the control area… it’s going to leak out everything in all of the piping, all of the equipment, and all of the hooked up tanks. This is all presuming there are no safety devices to stop this from happening.

Assuming my initial gut reaction was correct, is there a way to limit the amount so that it stops at the control area wall?

As in: is there a safety device such as an automatic shutoff valve we can put at the wall such that in the event of a leak or other event, the automatic valve will shut off and then we only have to count the amount of gas between the equipment and the shutoff valve?

I’ve looked in the IBC and its commentary for more info, but couldn’t find anything helpful. I’ve also reached out to a number of different people and there seems to be a variety of different opinions on it.

Thanks in advance.

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I have a building with FM Approved doors, but I can’t identify the fire resistance rating.

We have a fire label but nothing else (see the image). Is there a minimum fire rating for any FM Approved door?

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I’ve been reviewing standards to determine the equivalency between fireproofing thickness and the fire resistance rating.

This is for an industrial plant structure. I realize there are many factors but at some point I need a reference to determine what the rating is required to be.

What is the process to determine what the required fire-resistance-rating of a component needs to be?

In this case, it is for structural steel supporting columns of the open structure. The structure is composed of the main support columns and those supporting vessels, etc. The structure is about 5-6 levels tall.  For simplicity I wanted to address the main columns starting on floor 1 where a pool fire may start.  If I could find the standard / guidance for this then I can adapt for vessel supports, etc.  

I’ve been through calculations and information from API 2218 to determine the fireproofing thickness for a certain hour rating. However, I have yet to determine or find the hourly rating requirement.

I’m assuming it will be 1-3 hours, for example, using API 2510 (LPG) as a guide with reference to UL 1709. It does specify a 1½ hour time rating which then gives a fireproofing thickness. Further, the fire protection requirements will come from a risk assessment of the system. I have to be able to give guidance to the risk team to help them come to suitable answers.

What can I use to provide a best answer to an hourly rating, hopefully, chapter and verse?

Thank you for your help in advance.

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​In the corridors of an apartment building (wrap) there are fire doors that are double-egress pairs that are left-hand-reverse by left-hand reverse which follows the natural traffic pattern within the corridor.

However, there are also several right-hand-reverse by right-hand-reverse in the same corridor.

Is there a requirement one way or another on which direction these are supposed to be?

​I informed the project manager that the egress needs to follow the natural traffic pattern. I was curious about the different flow patterns of the doors so I researched the code but was unable to locate anything in the code regarding whether it was code or not, except for the AHJ. The county where I live also agreed with me but if someone out there knows if this is code please respond.

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I am designing a two-story dormitory Type II-B (under 2018 IBC) with CMU walls throughout.

The floor deck consists of 5-inch composite metal deck. The corridor walls and walls between suites must be 1/2-hour (due to sprinkler exception - NFPA 13 fully sprinklered).

There is also a horizontal separation between the two floors of 1/2-hour minimum.

There are two stair towers which are required to be 1-hour fire rated.

With the walls of the stair tower requiring a higher rating than is required between the two floors, is the floor then required to also be 1 hour?

In other words, can the floor penetrating a shaft enclosure (the walls of the stair shaft will sit on the metal deck) be of a lesser rating than the actual stair enclosure walls?

From what I've read regarding continuity, I'd say the floor rating would have to be 1 hour; but, I'm not clear. Please help.

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If a material has a Class A flame spread rating, can I assume that it does not diminish the rating of a fire-rated assembly?

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We are a sprinkler contractor running into a new situation for an apartment building. The apartment is designed under NFPA 13R.

We have an inspector requesting that we firestop a draft stop from the corridor into an apartment.

Can you point us in the right direction whether this is required?

A high-rise is considered a building with an occupied floor located more than 75-ft above the lowest level of fire department vehicle access.

Would a rooftop access stair with floor level located at 76' warrant the requirements of a high-rise building?

IBC 2015 Section 1011.12.2 states that where a stairway is provided for roof access shall be provided through a penthouse complying with 1510.2. Section 1510.2 states penthouse complying with 1510.2.1-5 shall be considered part of the story below.

The roof is not occupied and is only provided for egress for equipment access for equipment located on the roof.

Technically a portion of the occupied story is located above 75-ft.

Do I need to meet highrise requirements?

Thanks in advance.

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I am a recent architectural graduate designing and developing a small apartment building with a robust dedicated bike storage room (in lieu of car parking). The goal is to foster sustainable, walkable, urban design.

My concern is the recent and growing occurrence of e-bike electrical fires often triggered by non-UL certified lithium batteries. As I understand it, electrical fires are a different animal than your traditional wood fuel fire, in so far as effective suppression, burn rate, etc.

Does current code satisfy any electrical fire concerns?

Does NFPA 13 or even 13R provide sufficient protection for tenants and occupants in this new e-bike era?

Is this a topic of discussion among the ICC and code communities?

Concerned and looking out for safety. Thanks in advance.

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We are working on a 20-story apartment building where the corridors are open with parapet walls on either side. These serve as an exit access corridor. The project is under NFPA 101.

In Chapter 7 of NFPA 101, the exist access corridor is supposed to have a minimum fire resistance rating of 1-hour.  However, I can't seem to find any provision in the code regarding open corridors.

Will these corridors be required to have a fire resistance rating? What about the doors of the dwelling units?

I'm assuming if the corridor is not fire rated, then we wouldn't need opening protection through these partitions/walls. 

Thanks in advance.

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Are there any code requirements, or restrictions, to using spray-applied cementitious fireproofing on a steel structure in the space above the ceiling of a building when it is being used as a return air plenum?

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Canopies and overhangs have been discussed extensively, including the Meyerfire article and Exterior Projection Cheatsheet.

I know when and how NFPA 13 requires protection, but I am finding architects often provide a "gap" between the face of the building and an exterior canopy. Sometimes this gap is very small.

I have had an AHJ tell me a gap of any size results in no protection required, even if a roof overhang overlaps above.

I'd like to ask the building code experts here if this is a function of if the area beneath is considered part of the Fire Area.

Once again I have a project where it is a wide canopy of combustible construction, would require protection beneath, but it is free-standing, with just a couple inches gap between the canopy and the exterior wall of the building.

Sprinklers required, or not?

Thanks in advance.

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Can anyone point me in the right direction for codes pertaining to the construction of a draft curtain?

My client will be installing them as part of an attic design, where draft curtains are required per the sprinkler listing.

The sprinkler data sheet covers the depth requirement of the draft curtain. From browsing some websites I can gather they can be constructed of fire-resistant fiberglass woven textiles, glass (smoke baffles), or even panels of sheet metal.

Does NFPA or the IBC define how they are to be constructed?

My client will most likely use sheet metal. I'm curious if there is a gauge requirement for the metal. I may be overthinking it, but I like to see the code defining the curtain requirement, to avoid the contractor putting the wrong materials in place. I appreciate any help that anyone can provide. Thank you.

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What are you all seeing or specifying for firestop identification labels?

Masterspec calls for metal or plastic labels.

I found an FCIA (Firestop Contractors International Association) article that speaks to stamped metal tags or ceramic fiber tags (Google is failing on what that actually would look like).

It seems the firestop manufacturers all have stickers.

I have always specified the metal or plastic labels using the Masterspec language. If I get anything at all installed, it is the manufacturer stickers. I have concerns about the longevity of the stickers.

I’m curious what others are calling for, what your AHJs or clients ask for, and what is actually getting installed. Thanks in advance.

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How is it determined whether a steel structure will have spray-applied fire resistant materials?

I'm creating performance specification for a bid-set on a project, so I don't yet have input from a structural engineer. The project is a warehouse with large fire loads and exposed steel.

Recently, a project out for bid is a low-rise office building, 100% sprinklered with a wet-pipe system that is concealed by a suspended ceiling. On that project, all of the structural steel has spray-applied fire resistant materials.

What drives the issue of spray-applied fire resistive materials?

Thanks in advance.

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I have an S-1 occupancy. It is a privately owned storage unit (no public access) used for the storage of exotic cars, maybe 3 vehicles in total. The space is about 1,400 square feet, and is fire sprinkler protected. There is a wood-framed mezzanine at the back of the unit as is about 300 square feet.

The question that has come up is if the underside of the open wood stairs to the mezzanine needs to be protected with fire-retardant gypsum board?

There is no sprinkler coverage under the stairs. The mezzanine may be built out by the owner to have a few chairs, a couch, a television, etc.

Digging into the code talks a lot about accessibility but not so much about the fire resistance requirements for the stairs. I have the found following in the 2015 IBC (code we are under):

1104.4 Multistory buildings and facilities. At least one accessible route shall connect each accessible story and mezzanine in multilevel buildings and facilities.

Exceptions
1. An accessible route is NOT required to stories and mezzanines that have an aggregate area of not more than 3,000 square feet (278.7 m2) and are located above and below accessible levels. This exception shall not apply to:

...and...

4. Where a two-story building or facility has one story or mezzanine with an occupant load of five or fewer persons that does not contain public use space, that story or mezzanine shall not be required to be connected by an accessible route to the story above or below.

So...the accessibility issue is covered but nothing about the rating of the stairs that I can find. Any help would be appreciated. Maybe I am not looking in the correct code section.

Thank you!

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