Guidelines for building when reopen post COVID-19 lockdown fire & life safety aspect

Guidelines for building when reopen post COVID-19 lockdown fire & life safety aspect

To prevent the spread of the coronavirus (Covid-19) disease among building workers and office staff when commercial activities resume in various states of India, the states, district administration and the labour department already issued a detailed advisory for business units reopening while the lockdown is still in place. The labour department said that since the city has a unique mix of industrial and office workforce, owing to closeness with other national Capital region cities, it has been decided to apply more stringent measures in a few domains to prevent the spread of this disease.

Additional labour commissioner of NCR, Haryana. “All organisations are expected to align their operations to these guidelines to ensure safe working conditions. In case the companies don’t comply with the standard operating procedures (SOP), their permissions will be withdrawn and criminal proceedings would be initiated against them,” he said.

What is COVID-19

COVID-19 is a disease caused by a new strain of coronavirus. ‘CO’ stands for corona, ‘VI’ for virus, and ‘D’ for disease. Formerly, this disease was referred to as ‘2019 novel coronavirus’ or ‘2019-nCoV. The COVID-19 virus is a new virus linked to the same family of viruses as Severe Acute Respiratory Syndrome (SARS) and some types of common cold.

What are the symptoms of COVID-19?

Symptoms can include fever, cough and shortness of breath. In more severe cases, infection can cause pneumonia or breathing difficulties. More rarely, the disease can be fatal. These symptoms are similar to the flu (influenza) or the common cold, which are a lot more common than COVID-19. This is why testing is required to confirm if someone has COVID-19.

How does COVID-19 spread?

The virus is transmitted through direct contact with respiratory droplets of an infected person (generated through coughing and sneezing). Individuals can also be infected from and touching surfaces contaminated with the virus and touching their face (e.g., eyes, nose, mouth). The COVID-19 virus may survive on surfaces for several hours, but simple disinfectants can kill it.

The outbreak of coronavirus disease (COVID-19) has been declared a Public Health Emergency of International Concern (PHEIC) and the virus has now spread to many countries and territories.

The Ministry of Home Affairs has issued new guidelines for the restarting of building operation post coronavirus lockdown. As per the new guidelines, the production units have been asked to consider first week after the lockdown ends as a trial period. The new guidelines address the issues from accommodation to sanitization needs. It also asks the companies to not target high production in the first week of operations. "When Lockout/Tagout procedures are not in place, many energy sources can prove to be hazardous to operators/supervisors who are servicing or maintaining electrical, mechanical or chemical equipment. When heavy machinery and equipment are not maintained periodically, they can become dangerous for the operators/engineers," NDMA said in a statement. 

Building owners and facility managers will be getting ready to reintroduce occupants to structures that may have been relatively vacant for an extended period. During this unique time, maintenance of all fire protection and life safety systems in commercial and multi-occupancy residential build­ings. However, it is possible that many of the ongoing inspection, testing, and maintenance (ITM) activities required by locally enforced codes and standards may not have been completed for a variety of reasons. Regardless of the level of ITM performed during this time, it is imperative that building owners and facility managers verify the performance of all building fire protection and life safety systems prior to reoccupation. Now we learn below factors that should be confirmed by a qualified person before re-open­ing a building to ensure safety of all its occupants.

Based on the assumption that the building was in compliance prior to being closed, the checklist below provides some initial steps to help ensure that the occupancy is safe enough to reopen until a qualified professional can complete the regularly scheduled ITM of all fire protection and life safety systems.

Fire and life safety checklist

Confirm all the following checkpoints for each of the building systems. While this is not a complete list, it does contain many of the items that can be addressed and confirmed by a building owner or facility manager during their initial work to reopen a building. We get help from IS, NBC 2016 & NFPA standard.

General

1.    All inspection, testing, and maintenance is up to date on the following systems or building elements:

❑ Water-based fire protection system (NFPA 25)

❑ Fire pumps (NFPA 25 & IS 12469)

❑ Fire alarm system (NFPA 72 & IS 2189)

❑ Commercial cooking equipment ventilation and fire protection (NFPA 96)

❑ Portable fire extinguishers (NFPA 10)

❑ Fire/smoke dampers (NFPA 80 and NFPA 105)

❑ All fire doors (NFPA 80 and IS 3614)

❑ Emergency lighting equipment (NFPA 101 & IS 10322)

❑ Exit signs (NFPA 101 & IS 12349)

2.    Appropriate fire department access is unobstructed. (NFPA 1)

3.    For wildfire-prone areas, routine maintenance of combusti­ble vegetation has been completed. (NFPA 1)

4.    Hand sanitizers or alcohol-based hand rubs are stored and managed safely (NFPA 101), and if needed, learn more at https://youtu.be/1P3GjIBKwI8.

5.    Whether an undertaking from LPG piping installation agency and client stating that proposed gas bank, supply lines and other fitting associated with it is as per NBC of India -2016, Part-IV.

6.    Check with the local authority having jurisdiction (AHJ) to find out if they require any special provisions prior to reoc­cupying the building.

Fire Extinguishers (NFPA 10 & IS 2171)

❑ Fire extinguishers are accessible and not physically damaged.

❑ Fire extinguishers are Correctly located in the designated place. Operating instructions are clean, legible, and facing outwards.

❑ Pressure gauge reading or indicator is in the operable range or position on all fire extinguishers.

❑ Check weigh the extinguisher against the gross weight stamped on cylinder (this is the weight full, without hose, horn or carriage). If underweight by more than 10% of contents, the extinguisher should be removed from service and recharged.

Water-Based Systems (NFPA 25, IS 3844 and IS 13039)

❑ All control valves are open.

❑ Gauges are operable and not physically damaged.

❑ Water filled piping is maintained above 40 F (4 C).

❑ Sprinklers are not physically damaged. If any leakage will be repaired.

❑ There are no leaks from the piping or sprinklers.

❑ A Diesel fire pump should be required and provide diesel exhaust pipe from the diesel engine and terminate to atmosphere in a location acceptable to the local Authority.

❑ Fire department connections are accessible and not physically damaged.

❑ Hose connections (if provided) are accessible and not physically damaged.

❑ An additional static water storage tank to be provided at roof / terrace level with capacity specified by the local fire authority with arrangements of replenishment by main or alternate source of supply, which can be used in the eventuality of failure of other system under gravity flow.

❑ Visual inspection for all valves must be open, accessible and unobstructed. All the fire pumps to have direct access from the ground level.

Fire Alarm Systems (NFPA 72 & IS 2189)

❑ There are no trouble, supervisory, or alarm signals.

❑ Batteries and their connections should be examined and tested to ensure that they are in good serviceable condition under FACP.

❑ Notification appliances are not blocked or physically damaged.

❑ Fire Control panel functions should be checked and tested with all fault indicators and Loop circuits should be tested and checked.

❑ Initiating devices (smoke detectors, heat detectors, etc.,) are not physically damaged.

❑ Manual pull stations are accessible and not physically damaged.

❑ A test & inspection of all integration (Like: PA, Access Control, EXIT signage, AHU) and graphic software.

❑ A visual inspection with Cleaning should be made to check 60% Smoke Detector, MCP, Heat Detector under fire alarm system.

Electrical (NFPA 70B and NFPA 110)

❑ Confirm that routine maintenance and operational testing is completed for the following:

❑ Electrical equipment per the building’s Electrical Preventative Maintenance Program.

❑ Emergency and standby power systems.

Means of Egress (NFPA 101 & NBC 2016)

❑ All means of egress paths are unobstructed.

❑ All doors in the means of egress are working properly and not physically damaged.

❑ All doors are operable from egress side.

❑ All doors are not physically blocked.

❑ All fire doors are working properly and not physically damaged.

❑ All fire doors latch.

❑ All required lighting in the means of egress is functioning properly.

❑ Means of egress is illuminated when occupied.

❑ Emergency lighting is not blocked or physically damaged.

❑ Exit signs are not blocked or physically damaged.

❑ Exit signs are properly illuminated.

Ref:

https://www.researchgate.net/publication/40932394_NFPA's_Fire_Protection_Handbook

https://www.nfpa.org/Codes-and-Standards/All-Codes-and-Standards/Handbooks

https://www.who.int/emergencies/diseases/novel-coronavirus-2019

https://www.indiatvnews.com/business/news-manufacturing-production-unit-lockdown-restart-new-mha-guidelines-615807

https://www.who.int/medicines/areas/quality_safety/quality_assurance/supplement_4.pdf?ua=1

Fire Doors and Fire Exit Doors

Fire Doors and Fire Exit Doors

A fire door is a door with a fire-resistance rating (sometimes referred to as a fire protection rating for closures) used as part of a passive fire protection system to reduce the spread of fire and smoke between separate compartments of a structure and to enable safe egress from a building or structure or ship.

A fire door is more than just the door itself, it refers to the door, the fixings, the fitting, the ironmongery (latches, handles, etc.) and the frame. Fire doors should be compliant and tested to BS 476 Part 22 or to the European equivalent BS EN 1634-1. BS EN 13502-2, Fire classification of construction products and building elements sets the fire resistance classifications. 

This standard should not be confused with NFPA 80-2019 Standard for Fire Doors and Other Opening Protectives.  NFPA 80-2019 provides guidelines for the installation and maintenance of assemblies and devices used to protect openings in walls, floors, and ceilings whose main goal is to keep fire and smoke from moving throughout a building. Not including fabric fire safety curtains, this standard covers devices that have been the focus of a standardized fire test. Fire doors are designed to stop or slow down the spread of fire, smoke and toxic fumes from one part of a building to another, giving the building's occupants a chance to exit safely. The doors help protect the contents and structure of the building by limiting the fire spread

NFPA 80-2019 addresses information on swinging doors with builders hardware, swinging doors with fire door hardware, horizontally sliding doors, special-purpose horizontally sliding accordion doors or folding doors, vertically sliding fire doors, rolling steel doors, fire shutters, service counter fire doors, and host of others. The document can be used as a means to give guidance to authorities having jurisdiction (AHJs), so they can see if assemblies have met and maintained appropriate standards.

NFPA 80-2019 addresses information on swinging doors with builders hardware, swinging doors with fire door hardware, horizontally sliding doors, special-purpose horizontally sliding accordion doors or folding doors, vertically sliding fire doors, rolling steel doors, fire shutters, service counter fire doors, and host of others. The document can be used as a means to give guidance to authorities having jurisdiction (AHJs), so they can see if assemblies have met and maintained appropriate standards.

Here are some of the key features to look out for in terms of both domestic and commercial use:

•      Fire doors are made up of various components. The door itself is usually made from a solid timber frame, but they can sometimes be covered again in fire-resistant glass.
•      Around the edges of the door will be the intumescent seal, which is designed to expand when temperatures reach beyond 200°C to seal the gaps between the door and frame.
•      For a private premises, it is advised to install fire doors where the risk is most imminent, for example the kitchen, or rooms which house lots of electrical devices. If your property is a new build, it should have been subject to regulations ensuring certain doors are fire doors – check this with the developer.
•           For commercial or non-domestic properties, liability lies with whoever is deemed the ‘responsible person’ for that property or the employer. For example, the owner of the property, or the person in control of the property for trade reasons would be responsible.
•      Thorough risk assessments must be carried out and it is advisable to get professional help with all fire-safety-related regulations. There is more to fire safety than just fire doors; escape routes, lighting, warning systems and equipment checks are also required.
•         When you’re choosing a door it’s important to know what the different specifications mean.
•           Around 42% of deaths during house fires are not from direct contact with the flames, but the consumption of smoke. With this in mind, keep an eye out for a doorset with cold smoke seals. These should be within the intumescent seal.

The same requirements as above will apply to a fire exit door. There are also additional requirements where the door is the final exit point of a building:

1.   The door should open in the direction of evacuation.
2.    There should be no locks or catches. Many use a push bar system that will open the door when pressed down. If the door is also a secure entrance, the lock/catches must self-open when the fire alarm sounds.
3.    The final fire exit door must lead to a place of safety.
4.    It must have a self-closing mechanism so that the door will shut behind people evacuating in order to contain the fire and smoke. This will also limit the oxygen going in to the building which will feed a fire.
5.   The signage will need mandatory fire exit signs that are illuminated. Situated above the door. 

The following requirements must be complied with in respect of premises where necessary (whether due to the features of the premises, the activity carried on there, any hazard present or any other relevant circumstances) in order to safeguard the safety of relevant persons -

a.  Emergency routes and exits must lead as directly as possible to a place of safety;

b.  In the event of danger, it must be possible for persons to evacuate the premises as quickly and as safely as possible;

c.  The number, distribution and dimensions of emergency routes and exits must be adequate having regard to the use, equipment and dimensions of the premises and the maximum number of persons who may be present there at any one time;

d.  Emergency doors must open in the direction of escape;

e.  Sliding or revolving doors must not be used for exits specifically intended as emergency exits;

f.   Emergency doors must not be so locked or fastened that they cannot be easily and immediately opened by any person who may require to use them in an emergency;

g.  Emergency routes and exits must be indicated by signs; and

h.  Emergency routes and exits requiring illumination must be provided with emergency lighting of adequate intensity in the case of failure of their normal lighting.”

The “responsible person” is the landlord, employer, owner, and occupier. Anyone who uses or would require the use of the fire exit will have a responsibility to ensure that it remains clear, free from damage and that any contravention to this is reported to the employer, owner, occupier, landlord as soon as possible.

Sources:
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/485420/BR_PDF_AD_B1_2013.pdf
http://firecode.org.uk/Code_of_Practice_hardware_for_fire_and_escape_doors.pdf

Fire doors rating

Fire doors rating

Definition of a Fire Door - a door assembly, which is designed to hold back fire and smoke for a designated period and has been tested under conditions for door assemblies described in British Standard 476 Part 22; Fire Door Guidance -British Standard 8214-2008 (Code of Practice for Fire Door Assemblies).

Fire doors are made up of various components. The door itself is usually made from a solid timber frame, but they can sometimes be covered again in fire-resistant glass.

When I’m asked, “What is the required rating for a door in a particular wall?” nine times out of 10 my answer is, “It depends.” (This is the standard answer for nearly everything code-related.) In the Life Safety Code, required ratings for doors and other opening protective (e.g., windows) depend on the required hourly, fire-resistance rating of the barrier in which the opening is located and the function the barrier is serving.

Not all fire barriers are created equal. A door in an exit enclosure fire barrier will probably require a different rating than a door in a similarly rated corridor or hazardous area enclosure. Or a smoke barrier. Or a smoke partition. Or a shaft enclosure. (You get the idea.) At first glance it may seem convoluted, but the code does a good job of consolidating the opening protective rating requirements in one location. In the 2018 edition, you’ll find the required door rating in Table 8.3.3.2.2 (what I’ll refer to as “the table”). In the 2015 and earlier editions, the required ratings were located in Table 8.3.4.2. Prior to the 2003 edition, there was no handy consolidated table. If you’re using the 2000 or earlier edition, you’ll have to sort through a series of requirements and exceptions to determine the required door rating. (If you’re using the 2000 or earlier edition, you’re using a code that’s some 20 years out of date, and it might be time to join the rest of us in the 21^st century. But I digress.)

To use the table, you’ll first need to establish the fire barrier’s purpose as required by the code. The table lists the purpose under the heading “Component.” Components include:

• ·        Elevator hoistways
• ·        Elevator lobbies
• ·        Vertical shafts
• ·        Horizontal exits
• ·        Exit access corridors
• ·        Other fire barriers
• ·        Smoke barriers
• ·        Smoke partitions

This is where the table has, at times, caused some confusion. Some have misinterpreted it as prescribing minimum fire-resistance ratings for various fire barriers. For example, the bottom row addresses smoke partitions. The second column specifies fire-resistance ratings for smoke partitions (half hour and one hour). Some have been led to believe that based on the table, all smoke partitions must have a minimum fire resistance rating of a half hour. This is not the case for smoke partitions or any of the other components listed in the table.

How can I find out more about an existing fire door?

Each fire door is labeled with a permanent label that must remain legible. Fire-rated frames may have a label or embossment from a listing agency. The door and frame labels contain a wealth of information, including the manufacturer, length of time the component is designed to resist fire, whether the opening is to be equipped with fire exit hardware, and whether the door carries a temperature rise rating or is a smoke door assembly.

Fire door labels usually include a number allowing manufacturers to access more information about the door’s original construction. Frame labels may state a fire resistance duration longer than that of the door. In this case, the assembly’s rating will be the lower of the two. Some hardware, such as fire exit hardware, will also be labeled, but the information on the label is typically less detailed.

The requirements for smoke partitions are located in Section 8.4; you’ll find no fire-resistance rating requirement there. Smoke partitions require a rating only where required by another section of the code. An example would be corridor walls in new, large, residential board-and-care occupancies, which require a half-hour rating (32.3.3.6.2). Once it’s determined that the smoke partition requires a fire-resistance rating, then refer to the table to determine the required fire-protection rating of any doors. In the case of a half-hour rated smoke partition, doors must have a one-third hour, or 20 minute, fire-protection rating. In short, use the table to determine the required opening protective rating when a barrier is required by another section of the code to have a fire-resistance rating.

Fire barriers having a one-hour rating might require one-hour doors, three-quarter-hour doors, or one-third-hour doors. Again, it depends on the barrier’s application. Fire barriers having a two-hour rating generally require one-and-a-half hour doors. Fire barriers with a rating exceeding two hours are rarely required by the code, except for a few occupancy separation fire barriers involving relatively hazardous occupancies.

I sometimes get the question, “Why does the code allow a 20-minute door in a one-hour barrier? Why not just require a one-hour door?” This would certainly make life easier when applying the code, but it also might require a more expensive door than is actually needed for life safety. Where the code requires 20-minute doors, it’s usually in a barrier that the committees primarily wanted to be smoke resistant. Before the days of smoke partitions, which first appeared in the 2000 edition, when a committee wanted a smoke resistant barrier (e.g., a corridor wall), it was simpler to mandate a one-hour barrier than to come up with criteria to evaluate smoke resistance. Since they really wanted a nominal degree of fire resistance, rather than mandating a substantial one-hour door, they were comfortable with a 20-minute door, which would inherently resist the passage of smoke.

Other reasons for the difference in fire barrier ratings and door ratings are the tests used to establish the ratings. You might have noticed I refer to the fire-resistance rating of a fire barrier, whereas a door has a fire-protection rating. Fire barrier assemblies are tested at a lab using a standard like ASTM E119, Standard Test Methods for Fire Tests of Building Construction and Materials, which yields a fire-resistance rating. Fire doors are tested using a standard like NFPA 252, Standard Methods of Fire Tests of Door Assemblies, which yields a fire-protection rating. Comparing the ratings from the different tests is not an apples-to-apples comparison. An hour’s worth of fire resistance (fire barrier) is not necessarily equivalent to an hour’s worth of fire protection (fire door).

And although it’s not a very scientific reason, this is the way the code has done it for many years and it seems to work. To this point, there has been no compelling reason to change the approach. If it’s not broken, there’s no need to fix it.

Remember Fire resisting glass can withstand exposure to the heat condition in a fire test for at least 60 minutes before it reaches a temperature high enough to soften it. This is mainly because, with clear FR glazing, nearly 50 per cent of the incident heat is transmitted through the glass by radiation.

Where can I find the code requirements for fire doors?

National Fire Protection Association (NFPA) 80, Standard for Fire Doors and Other Opening Protectives, is referenced by the International Building Code (IBC), International Fire Code (IFC), NFPA 101, Life Safety Code, and other codes and standards. NFPA 105, Standard for the Installation of Smoke Door Assemblies and Other Opening Protectives, addresses smoke doors and is also referenced in these publications.

Some fire door requirements are included within the applicable building or fire code, but NFPA 80 and 105 are referenced for many of the detailed requirements. For product-specific issues, the manufacturer’s listings must be referenced. For example, to find out the maximum fire door size available from a particular manufacturer,

The increased use of sprinklers has resulted in reduced requirements for temperature-rise doors. The 2012 IBC requires doors in interior exit stairways/ramps and exit passageways to have a maximum transmitted rise in temperature of 232 C (450 F) above ambient at the end of 30 minutes of exposure, but also includes an exception stating temperature-rise doors are not required in buildings equipped throughout with an automatic sprinkler system.

For the convenience of building occupants, how can fire doors be held open in a code-compliant manner?

Fire doors must be closed during a fire to compartmentalize the building and prevent the spread of smoke and flames. The intent is to protect the means of egress and allow building occupants time to evacuate safely. If fire doors are blocked or wedged open, they will not be able to do their job and protect the building and its occupants.

What is positive-latching, and is it required for all fire doors?

Hardware on fire door assemblies has to have an active latchbolt to prevent the pressure caused by a fire from pushing the door open and allowing smoke and flames to spread. A springlatch found in a standard lockset or latchset is considered an active latchbolt; some fire door configurations require a specific ‘latch throw’ (i.e. dimension of latch projection).

A deadbolt is not an active latchbolt, because it can be held retracted. An electromagnetic lock does not provide a positive latch, because there is no latching mechanism and the locking is accomplished when the electromagnet bonds to the steel armature. Electric strikes used on fire doors must be fail-secure—that is, when power is cut, the latch is securely captured behind the strike keeper. A fail-safe electric strike could allow the door to become unlatched, so such strikes may not be used on fire doors.

How is fire exit hardware different from panic hardware?

When panic hardware is used on fire doors, it must be fire exit hardware, which bears labels for both panic and fire resistance. A door with fire exit hardware will also have an additional label, indicating it is equipped with fire exit hardware. Fire exit hardware does not incorporate a mechanical dogging feature—the means to hold the latch retracted using a key, thumbturn, or Allen wrench. For fire doors where a ‘push/pull’ condition is desired, fire exit hardware with electric latch retraction may be used, as long as the latch projects automatically upon fire alarm, to secure the door.

Some vertical rod fire exit hardware for pairs of doors can be installed ‘less bottom rod’ (LBR). These devices use the top rod and latch only, with no bottom rod or latch. The advantage is there is no floor-mounted strike, and no bottom rod or latch to become damaged by carts or traffic. This configuration can sometimes cause a reduction in security, because it may be more easily defeated with only one latching point at the top of the door. In most cases, doors with LBR devices are required to have an auxiliary fire pin, which mounts in the edge of one door and projects into a hole in the edge of the other door if there is a fire.

Do fire doors need smoke gasketing? Are smoke doors also fire doors?

NFPA 80 and NFPA 105 do not specifically state fire doors and smoke doors require smoke gasketing. The key is to check the applicable code or standard, such as the International Building Code, for a limitation on air infiltration, typically a reference to UL 1784, Air Leakage Tests of Door Assemblies, as the test standard.

For fire doors and smoke doors in certain locations, the limit for air infiltration is 0.02 m3/(s • m2) or less as tested at a pressure of 0.02 kPa (3 cfm per square foot or less as tested at a pressure of 0.10 inch of water)—for most door sizes, this cannot be achieved without smoke gasketing. The requirements for smoke doors and fire doors depend on where they are used. For example, smoke barriers, smoke partitions, exit enclosures, and corridors all have varying requirements for smoke and fire resistance, and the applicable code sections must be consulted to see if a limit on air infiltration is established.

Thanks for reading, and as always, stay safe.