What is the meaning of fire tower in a building?

A fire tower is a firefighting shaft: an enclosed shaft of 120-minute fire resistance holding a protected lobby, a staircase and a fireman's lift, opening straight outside or through a protected passage. Fire fighters use it to reach the fire, and occupants use it to escape.

Is a fire tower the same as a fire escape staircase?

No. A fire escape staircase can be an open stair on the outside wall with no lift. A fire tower is enclosed and contains a fireman's lift and a lobby with fire fighting equipment. Some state rules, such as Gujarat's, use the two names together, so read the clause.

Above what height is a fire tower required?

Under NBCS 2026, in high-rise buildings of 24 m or more. States set their own lines: Telangana requires one at 24 m and above from 7 October 2026, and Goa above 8 storeys or 24 m.

What is a fireman's lift?

The lift inside the fire tower. Fire fighters use it to reach floors quickly, it goes down to the basements, and it also brings down people who cannot use the stairs.

How many fire towers does a high-rise need?

NBCS 2026 plans one for each residential tower and educational block, and one for each compartment of offices, shops, hospitals and assembly buildings, with at least two where a floor has three or more compartments.

Can a fire tower open into the ground floor lobby?

Not into a large lobby. NBCS 2026 lets a fire tower discharge straight outside or through an exit passageway with 120-minute walls; in homes and schools it must open straight outside.

Glossary 16 min read

Fire tower: the firefighting shaft in a building, and how it differs from a fire escape staircase

Updated October 2026By Flamekite Editorial DeskFacts checked against official sources on 24 October 2026

Quick answer

A fire tower is a firefighting shaft: an enclosed 120-minute stair, lobby and fireman's lift. NBCS 2026 plans one for each high-rise tower of 24 m or more.

It is built first for fire fighters, who ride the fireman's lift up and fight the fire from a hydrant in its lobby, and it doubles as a protected way out for occupants. An external fire escape staircase is a different thing: an open stair on the outside wall. States set their own triggers: Telangana moved its fire tower line from above 15 m to 24 m on 7 October 2026, and Goa asks for one above 8 storeys or 24 m.

Fire resistance of the shaft: 120 min; Walls, lobby and doors; At a glance
Telangana trigger since 7 Oct 2026: 24 m; Was above 15 m; State rules
Goa trigger: 8 storeys; Or 24 m; State rules
Lobby pressurisation: 25 to 30 Pa; Unless naturally ventilated; The numbers

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Fire tower at a glance

The fire tower as NBCS 2026 Part F defines it, with the source of each fact.
What	The rule	Source
Other name	Firefighting shaft; Part F lists the term as "Firefighting Shaft (Fire Tower)" in clause 2.24	BIS, SP 7:2026
What it contains	A protected lobby, a staircase and a fireman's lift, enclosed together	BIS, SP 7:2026
Fire resistance	120 min for the shaft, with 120 min fire doors	BIS, SP 7:2026
Kit in the lobby	Wet riser and landing valve, hydrant and hose reel, firemen's talk-back, room for at least 2 wheelchairs	BIS, SP 7:2026
Where it leads	Straight to the exit discharge outside, or through an exit passageway with 120 min walls	BIS, SP 7:2026
How many	One for each residential tower, educational block, and compartment of institutional, assembly, business and mercantile buildings; at least 2 where a floor has 3 or more compartments	BIS, SP 7:2026
Applies to	High-rise buildings, which Part F starts at 24 m (clause 2.39); smaller single-stair buildings make that stair a shaft type	BIS, SP 7:2026
The lift	A fireman's lift that also serves basements and acts as the evacuation lift for people who need help	BIS, SP 7:2026
Not the same as	An external fire escape staircase, which is an open stair on the outside wall (clause 4.4.2.4.3.4)	BIS, SP 7:2026
Legal force	NBCS 2026 is voluntary; state instruments such as Telangana's circular 3455 of 2026 make a fire tower compulsory	TGFD circular 3455

Fire tower and fire escape staircase compared

The two are often confused. NBCS 2026 Part F treats them as different exits with different rules.
Option	Fire tower (firefighting shaft)	External fire escape staircase	Source
What it is	An enclosed shaft of lobby, stair and fireman's lift	An open stair on the outside wall or facade	BIS, SP 7:2026
Built for	Fire fighters first, and occupants' escape	Occupants' escape	BIS, SP 7:2026
Lift	Fireman's lift, down to the basements	None	BIS, SP 7:2026
Fire rating	120 min shaft and doors	Non-combustible; the doorway to it 120 min; openings within 3 m at least 60 min	BIS, SP 7:2026
Smoke control	Pressurised lobby, unless naturally ventilated	Open to the air	BIS, SP 7:2026
Width	As the building type sets: 1.25 m for apartments, 1.50 m for most others, 2.00 m for assembly and institutional buildings	A straight flight of at least 1,500 mm	BIS, SP 7:2026
Where it ends	Straight outside or through a 120 min exit passageway, never through a large lobby	Directly on the ground	BIS, SP 7:2026
Fire fighting	Wet riser, landing valve and hose reel in the lobby	None set by the clause	BIS, SP 7:2026
Slope	Risers of 150 mm (175 mm in one or two family homes), at most 15 a flight	Never steeper than 45 degrees	BIS, SP 7:2026

How a fire tower is planned in a high-rise

Count the towers and compartments
Plan one fire tower for each residential tower or educational block, and one for each compartment of an institutional, assembly, business or mercantile floor. Three or more compartments on a floor need at least two.
Put it on the outside wall
Under 60 m the shaft keeps one side on the external wall and opens straight outside. In a tower of 60 m or more with the shaft in the core, it reaches outside through an exit passageway.
Size the lobby
Make the lobby big enough for at least two wheelchairs, and for refuge spaces if the design uses them instead of refuge areas: 12 m² or more.
Fit the fire fighting kit
Place the wet riser, landing valve, hydrant, hose reel and talk-back in the lobby, and take the fireman's lift down to every basement.
Control the smoke
Pressurise the lift lobby at 25 to 30 Pa behind 120-minute doors unless it is naturally ventilated, and pressurise the stair as Table 5 sets. Over 60 m, keep the force to open a door at or under 133 N.

Fire tower meaning in NBCS 2026 clause 2.24

The national standard gives the fire tower its newer name, firefighting shaft, and defines it by what is inside.

Word for word

An enclosed shaft having a protected area of 120 min fire resistance rating

SP 7:2026, National Building Construction Standards 2026, Part F, clause 2.24 (opening words) BIS, SP 7:2026

The clause goes on: the shaft holds a protected lobby, a staircase and a fireman's lift, and connects directly to the way out at ground level or through an exit passageway with 120-minute walls. Every floor is reached from it, so fire fighters can get onto the floor on fire and help people out by the lift. The same shaft is also part of the occupants' exit plan. Part F's index lists both names, so a plan or a state rule that says fire tower means this shaft.

Inside a fire tower, from the floor to the street

The path a fire fighter climbs and an occupant descends, piece by piece.

The floor door
A 120-minute fire door that closes by itself and is never held open. BIS, SP 7:2026
The protected lobby
Pressurised or naturally ventilated, with the hydrant, landing valve, wet riser and talk-back, and room for 2 wheelchairs. BIS, SP 7:2026
The fireman's lift
Opens into the lobby, serves the basements, and on a habitable terrace goes up to it as well. BIS, SP 7:2026
The staircase
Non-combustible, at least 120 minutes, not wrapped round a lift shaft, with no pipes, ducts or panels inside. BIS, SP 7:2026
The exit discharge
Straight outside, or along an exit passageway with 120-minute walls; homes and schools must go straight outside. BIS, SP 7:2026

Fire tower rules by state

NBCS 2026 is only a guide; these are the state instruments Flamekite read that require, define or allow a fire tower. A state not listed was not checked.

	Required from	What the rule says
NBCS 2026 Part F (national guide) BIS, SP 7:2026	High-rise, 24 m or more	One shaft per tower, block or compartment (Annex D-2)
Telangana, circular 3455 of 2026 TGFD circular 3455	24 m, every occupancy, from 7 October 2026	Was above 15 m; applies to fresh Provisional NOC applications
Goa, DFES inspection checklist Directorate of Fire and Emergency Services, Goa	Above 8 storeys or 24 m	Fire lift for 8 passengers alongside
Rajasthan, Model Regulations 2025 Rajasthan UDH	Non-residential multi-storey buildings	A pressurised fire staircase or a fire tower is allowed (5.4(vi)); defined in 2.77
Gujarat, Regulations 2023 (19.1.5) Gujarat Fire Safety Compliance Portal	45 to 70 m, where the stair is central and unventilated	A fire escape staircase (fire tower) on either side, within 30 m travel
Tripura, Fire Safety Rules 2026 Directorate of Fire and Emergency Services, Tripura	As its high-rise annex sets	Defines "Firefighting Shaft (Fire Tower)" in the words of NBCS 2026
Kerala, KMBR rule 35(2) as amended in 2025 KMBR amendment 2025	Homes over 3 storeys, other buildings over 2	A fire escape staircase, taken down to the lowest basement where there are more than 2
Jammu and Kashmir, UBBL 2021 J&K H&UDD	Buildings over 30 m	An open fire escape staircase may stand in the setback

Delhi's Fire Service Rules 2010 leave exits and their protection by fire check doors or pressurisation to the building bye-laws or NBC 2005. Maharashtra's own stair rules were not confirmed.

Fire tower numbers in NBCS 2026

120 min
Fire resistance of the shaft and its doors BIS, SP 7:2026
2
Wheelchairs the lobby must hold, at the least BIS, SP 7:2026
30 Pa
Top of the 25 to 30 Pa band for a pressurised lift lobby BIS, SP 7:2026
133 N
Most force needed to start opening a stair door in buildings over 60 m BIS, SP 7:2026
60 m
Height above which a core shaft may reach the street through an exit passageway BIS, SP 7:2026
3
Compartments on a floor that call for a second shaft BIS, SP 7:2026
2 h
Lobby door of the single stair in a small building, which must be shaft type BIS, SP 7:2026
15
Most risers allowed in one flight of the stair BIS, SP 7:2026

How many fire towers does your building need?

NBCS 2026 Annex D-2 counts fire towers by building and by compartment. Check your state's trigger height in the table above first.

If A residential building or tower of 24 m or more
One fire tower per building or tower, discharging straight outside. BIS, SP 7:2026
If An educational building of 24 m or more
One per building or block, again straight outside. BIS, SP 7:2026
If An office, shop, hospital or assembly building of 24 m or more
One per compartment; if a floor has 3 or more compartments, at least 2. BIS, SP 7:2026
If An industrial, storage or hazardous building
Agree the need for a shaft with your local fire authority. BIS, SP 7:2026
If A building below the Part F triggers with a single staircase
That one stair must be a firefighting-shaft type on the outside edge, ventilated, with a 2-hour lobby door and a 1-hour stair door. BIS, SP 7:2026
If A building in Telangana of 24 m or more, filed on or after 7 October 2026
A fire tower and a Fire Command Centre room, whatever the occupancy. Fire NOC Telangana TGFD circular 3455

Fire tower items a plan reviewer looks for

Drawn from the Part F clauses on the shaft, its stair and its lobby.

Shaft walls and doors of 120 minutes, doors self-closing and never on hold-open BIS, SP 7:2026
Lobby with wet riser, landing valve, hose reel and talk-back, and space for 2 wheelchairs BIS, SP 7:2026
Fireman's lift serving every basement, with a pressurised lobby BIS, SP 7:2026
Discharge straight outside, or by a 120-minute exit passageway; not through a large lobby BIS, SP 7:2026
No living space or store opening into the stair, and no electrical shafts, ducts or gas pipes through it BIS, SP 7:2026
Treads of at least 250 mm in homes and 300 mm elsewhere; no more than 15 risers a flight BIS, SP 7:2026
Clear height of 2.4 m in the exit and a door at least 2.0 m high BIS, SP 7:2026
Every refuge area opening directly into the shaft BIS, SP 7:2026

Fire escape staircase types the codes allow

A fire tower is one kind of fire exit. These are the others the rules Flamekite read describe.

Clause 4.4.2.4.3.2
Internal enclosed staircase
Inside the building, non-combustible and rated at least 120 minutes, entered through a 120-minute fire door. BIS, SP 7:2026
Clause 4.4.2.4.3.4
External staircase
On the outside wall, straight flights of at least 1,500 mm, handrails 1,000 to 1,200 mm high, baluster gaps of 150 mm or less. BIS, SP 7:2026
Clause 4.4.2.4.3.4(j)
Spiral staircase
Only for a small number of people in a building of 9 m or less, and at least 1,500 mm across. BIS, SP 7:2026
Rajasthan 5.4(v)
Fire staircase on the outer face
On the outside surface or open on two sides, 1.0 m from the nearest wall; up to 30 m and under 500 m² a floor it may double as the main stair. Rajasthan UDH
Gujarat 15.5.3
Gujarat external stair
Flights of 1,250 mm with 250 mm treads and risers up to 190 mm, at most 15 risers, handrails 700 to 900 mm. Gujarat Fire Safety Compliance Portal
Clause 6.8.1.4
Exterior fire escape ladder
A stair or basket-ladder fire escape from the roof to the ground, required on grain elevators. BIS, SP 7:2026

Fire tower and the words around it

Plans, rules and fire service letters use these terms with fire tower.

Firefighting shaft: The name NBCS 2026 uses for a fire tower (clause 2.24). BIS, SP 7:2026
Fireman's lift: The lift in the shaft for fire fighters, also the evacuation lift for people who need help; NBCS prefers every lift in a bank to be one (clause 2.27). BIS, SP 7:2026
Fire lift: Goa's checklist word for the same lift, carrying 8 passengers and running on alternate power. Directorate of Fire and Emergency Services, Goa
Exit discharge: The part of the way out from the end of the exit to a public way outside; the fire tower ends there. BIS, SP 7:2026
Exit passageway: A protected corridor with 120-minute walls that links a shaft to the outside when it cannot open straight out. BIS, SP 7:2026
Pressurised fire staircase: A stair kept free of smoke by air pressure; Rajasthan allows it as an option beside the fire tower for non-residential buildings. Rajasthan UDH
Fire tower (Rajasthan): Regulation 2.77: an enclosed fire-resisting area, separate from the structure and linked to an exit, holding a protected lobby, stair and fireman's lift. Rajasthan UDH
Fire escape staircase (Gujarat): Gujarat's regulation 19.1.5 puts fire tower in brackets after it, using the two names for the same stair. Gujarat Fire Safety Compliance Portal

Fire tower rule changes, 2005 to 2026

2005
The NBC revision widens external exit stairs to 1,250 mm with 250 mm treads. BIS, SP 7:2026
2016
The NBC 2016 revision builds the firefighting shaft concept into Part 4 and its high-rise annex, for fire fighters and for staged evacuation. BIS, SP 7:2026
13 December 2023
Gujarat's regulations require a fire escape staircase (fire tower) on either side of a 45 to 70 m building with a central unventilated stair. Gujarat Fire Safety Compliance Portal
12 May 2025
Rajasthan's Model Building Regulations define the fire tower (2.77) and allow it in non-residential multi-storey buildings. Rajasthan UDH
30 April 2026
NBCS 2026 replaces NBC 2016; Part F moves the high-rise line to 24 m and names the shaft "Firefighting Shaft (Fire Tower)". Gazette of India
2 June 2026
Tripura's Fire Safety Rules 2026 adopt the same definition of the firefighting shaft. Directorate of Fire and Emergency Services, Tripura
26 September 2026
Telangana's circular 3455 moves its fire tower trigger from above 15 m to 24 m for every occupancy. TGFD circular 3455
7 October 2026
The Telangana change applies to fresh Provisional NOC applications. TGFD circular 3455

Fire tower worked out for five buildings

Flamekite’s working from the official rules; no government publishes this figure.

Flamekite's reading of the clauses for described buildings. The fire service's approval of your plans decides.

Case 1
30 m apartment tower in Hyderabad
Residential apartments, filed after 7 October 2026.
What applies 24 m or more, so Telangana's circular requires a fire tower and a Fire Command Centre room; under NBCS 2026 the tower's shaft must open straight outside. TGFD circular 3455
Case 2
20 m office in Hyderabad
Business occupancy, 20 m, filed after 7 October 2026.
What applies Still needs a fire NOC as a business building over 15 m, but no longer a fire tower, which now starts at 24 m. TGFD circular 3455
Case 3
40 m mall with 3 compartments a floor
Mercantile and assembly floors divided into three fire compartments.
What applies At least 2 fire towers, with every compartment able to reach one. BIS, SP 7:2026
Case 4
Small office with one stair
Business occupancy of 12 m and 600 m², under the Part F triggers of 15 m and 750 m².
What applies Its single stair must still be a firefighting-shaft type on the outside edge, with a ventilated lobby, a 2-hour lobby door and a 1-hour stair door. BIS, SP 7:2026
Case 5
75 m office tower with a central core
Shafts placed in the structural core.
What applies Allowed at 60 m and above, but each shaft must reach the outside through an exit passageway; the lobby door force should stay at or under 133 N. BIS, SP 7:2026

Fire tower design mistakes

Each one turns the fire tower into a chimney or a dead end.

If Ending the shaft in the main entrance lobby
A fire tower may not discharge through a large lobby; homes and schools must open straight outside. BIS, SP 7:2026
If Wedging the lobby doors open
Fire doors in exits must stay closed under a spring closer, never on hold-open. BIS, SP 7:2026
If Running cables, ducts or gas pipes through the stair
None may pass through or open into the staircase. BIS, SP 7:2026
If Calling an open steel stair a fire tower
An external stair has its own rules; a fire tower is enclosed and holds a fireman's lift. BIS, SP 7:2026
If Stopping the fireman's lift at ground level
Lifts in the shaft must go down to the basements, with a pressurised lobby. BIS, SP 7:2026
If Leaving windows next to an external escape stair
Openings within 3 m need fire-rated doors or windows of at least 60 minutes. BIS, SP 7:2026

Four fire tower myths

You may have read
A fire tower is a lookout for spotting fires.
Myth
What the sources say
In Indian building rules it is the firefighting shaft of a high-rise: lobby, stair and fireman's lift. BIS, SP 7:2026
You may have read
Any fire escape staircase is a fire tower.
Myth
What the sources say
Part F separates the two: an external escape stair is open and has no lift. BIS, SP 7:2026
You may have read
Telangana dropped fire towers.
Myth
What the sources say
It moved the trigger from above 15 m to 24 m; towers of 24 m or more still need one, whatever the use. TGFD circular 3455
You may have read
Low buildings never need a shaft-type stair.
Myth
What the sources say
Below the Part F triggers, a building with only one staircase must make it a firefighting-shaft type. BIS, SP 7:2026

Fire tower upkeep for building managers

Do

Test the lobby and stair pressurisation fans on alternate power during drills. MFS Form B guidelines
Keep the hydrant cabinet in the shaft lobby marked FIRE HOSE CABINET in 75 mm letters, with a glass panel. BIS, SP 7:2026
Keep the firemen's talk-back in the shaft lobby working on every floor. BIS, SP 7:2026

Don’t

Don't store anything in the lobby or on the stair: no store or living space may open into it. BIS, SP 7:2026
Don't rehang a door to open against the escape: doors in fire exits open in the direction of exit (clause 4.2.9). BIS, SP 7:2026
Don't extend ordinary lifts into the basement: Part F wants regular lifts to stop at the ground exit level and basement lifts kept separate. BIS, SP 7:2026

What Flamekite could not confirm about fire tower rules

Four things a reader may expect here were not verified on 24 October 2026.

The wording and clause number of fire tower in NBC 2016 Part 4 and NBC 2005. BIS sells both texts and Flamekite did not read them. The NBCS 2026 foreword says the 2016 revision built in the firefighting shaft, and Telangana's above-15 m trigger matched NBC 2016's 15 m high-rise line.

Maharashtra's stair and shaft rules in UDCPR 2020 and Mumbai's DCPR 2034, and Delhi's in its Unified Building Bye-Laws 2016. Delhi's Fire Service Rules 2010 leave exits to the bye-laws or NBC 2005.

Telangana's own definition of a fire tower: the circular of 26 September 2026 changes the trigger but does not define the term.

NBCS 2026 itself binds no one. Only Assam had written NBCS 2026 into its fire law by 24 October 2026, and Uttar Pradesh's OSH Rules 2026 apply Part F to workplaces of 5 or more floors or 20 m.

Questions about Fire tower

What is the meaning of fire tower in a building?: A fire tower is a firefighting shaft: an enclosed shaft of 120-minute fire resistance holding a protected lobby, a staircase and a fireman's lift, opening straight outside or through a protected passage. Fire fighters use it to reach the fire, and occupants use it to escape.
Is a fire tower the same as a fire escape staircase?: No. A fire escape staircase can be an open stair on the outside wall with no lift. A fire tower is enclosed and contains a fireman's lift and a lobby with fire fighting equipment. Some state rules, such as Gujarat's, use the two names together, so read the clause.
Above what height is a fire tower required?: Under NBCS 2026, in high-rise buildings of 24 m or more. States set their own lines: Telangana requires one at 24 m and above from 7 October 2026, and Goa above 8 storeys or 24 m.
What is a fireman's lift?: The lift inside the fire tower. Fire fighters use it to reach floors quickly, it goes down to the basements, and it also brings down people who cannot use the stairs.
How many fire towers does a high-rise need?: NBCS 2026 plans one for each residential tower and educational block, and one for each compartment of offices, shops, hospitals and assembly buildings, with at least two where a floor has three or more compartments.
Can a fire tower open into the ground floor lobby?: Not into a large lobby. NBCS 2026 lets a fire tower discharge straight outside or through an exit passageway with 120-minute walls; in homes and schools it must open straight outside.

Keep reading

Fire NOC in TelanganaThe 24 m fire tower trigger from 7 October 2026.
Fire NOC in GoaThe DFES checklist: fire tower above 8 storeys or 24 m.
Fire NOC in GujaratThe 2023 regulations on staircases and fire towers.
Fire NOC in RajasthanFire staircases and fire towers in the 2025 regulations.
National Building Code 2026What NBCS 2026 changed when NBC 2016 was withdrawn.
Free fire NOC checkerCheck whether your building needs a fire NOC.

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