Source: https://www.scdf.gov.sg/firecode/table-of-content/chapter-3-structural-fire-precuations/tables-of-chapter-3
Timestamp: 2020-01-22 17:13:39
Document Index: 508362963

Matched Legal Cases: ['ART 2', 'art 20', 'art 1', 'art 11', 'art 11', 'art 4']

Related tables of Chapter 3 | SCDF
Related tables of Chapter 3
TABLE 3.2A : SIZE LIMITATION OF BUILDING & COMPARTMENT
Maximum Cubical Extent
Compartment below ground level
(No compartment shall comprise more than one storey) 2000m2 7500m³
Compartments between average ground level and a height of 24m
(No compartment shall comprise more than 3 storeys) 4000m2 15000m³
Compartments above a height of 24m from average ground level
TABLE 3.3A : Minimum periods of fire resistance
In this Table -
“cubical extent” means the cubical extent of the building or, if the building is divided into compartments, the compartment of which the elements of structure forms part;
“floor area” means the floor area of each storey in the building or, if the building is divided into compartments, of each storey in the compartment of which the element of structure forms part;
“height” has the meaning assigned to that expression by Cl.3.3.1b.;
“NL” means No limit applicable.
“NR” means Not Relevant.
PART I : BUILDINGS OTHER THAN SINGLE STOREY BUILDINGS
Minimum period of fire resistance for elements of structure (*)/external wall/compartment wall forming part of:
Cubical Extent (m³)
Above ground Storey (hrs)(5)
Basement Storey (hrs)
PG I - Small residential
House having not more than 3 storeys NL NL NL 1 1
House having 4 storeys NR 250 NR 1 1
NL NL NL 1 2
House having more than 4 storeys NL NL NL 1 2
PG II - Other residential
Building or part (+) having not more than 2 storeys NL 500 NR 1 1
Building or part (+) 3 storeys NR 250 NR 1 1
Building having more than 3 storeys 28 3000 8500 1 2
NL NL NL 2 2
PG III - Institutional 28 2000 NL 1 1
PG IV - Office 15 NL 3500 1 1
28 5000 14000 1 2
PG V - Shop 15 NR 3500 1 1
28 1000 7000 1 2
NL NL NL 2 4
PG VI - Factory 15 NR 4250 1 1
28 NR 8500 1 2
PG VII - Place of public resort 15 NR 3500 1 1
PG VIII - Storage and general 15 NR 1700 1 1
15 NR 3500 1 2
28 NR 7000 2 4(b)
NL NL NL 4(a) 4(b)
For the purpose of Cl 3.3.2 the period of fire resistance to be taken as being relevant to an element of structure is the period included in columns (3) or (4) in the line of entries which specifies the floor area with which there is conformity or, if there are two or more such lines, in the topmost of those lines.
(*) = A floor which is immediately over a basement storey shall be deemed to be an element of structure forming part of a basement storey.
(**) = Height for elements of structure referred to building height including basement. In the case of compartment wall/external wall, the height shall be based on the height of the wall between compartment floors.
(+) = The expression “part” means a part which is separated as described in Cl.3.3.1b..
(a) = This period is reduced to 2-hrs for:
(1) non-sprinkler-protected, open-sided standalone car park buildings
(2) sprinkler-protected, above-ground car park floors in standalone car park building or sprinkler- protected mixed-use building.
(b) = Single basement car park storey, which is sprinkler-protected, the element of structure can be reduced to half the minimum period of fire resistance.
PART 2 - SINGLE STOREY BUILDINGS
Minimum period of fire resistance for elements of structure, external wall/compartment wall
PG III - Institutional
PG IV - Office
PG V - Shop
PG VI - Factory
PG VII - Place of public resort
PG VIII - Storage and general
For the purpose of Cl 3.3.2 the period of fire resistance to be taken as being relevant to an element of structure is the period included in column (3) in the line of entries which specifies the floor area with which there is conformity or, if there are two or more such lines, in the topmost of those lines.
(a) = This period is reduced to 2-hrs for open-sided buildings which are used solely for car parking.
TABLE 3.3B : REQUIREMENTS FOR SUSPENDED CEILING
Required Fire Resistance of Floor
Description of Suspended Ceiling
Non-compartment
Surface of ceiling exposed within the cavity not lower than Class I surface flame spread rating.
Less than 1-hr
Surface of ceiling exposed within the cavity not lower than Class 0 surface flame spread rating; supports and fixing for the ceiling non-combustible.
More than 1-hr
Ceiling of non-combustible con- struction and jointless; supports and fixings for the ceiling non- combustible.
15m or more
Surface of ceiling exposed within the cavity not lower than Class 0 surface flame spread rating and jointless; supports and fixing for the ceiling non-combustible.
Ceiling of non-combustible con- struction and jointless; supports and fixings for the ceiling non- combustible
References to classes in the above table are to classes as specified in Cl.3.13.
Where the space above a suspended ceiling is protected by an automatic sprinkler system it shall be exempted from the requirements for non-combustibility and surface spread of flame classification as specified in the above table provided the ceiling is not situated over an exit passageway, protected lobby or other required protected means of escape.
TABLE 3.4A : SPECIFIC PROVISIONS OF TEST FOR FIRE RESISTANCE OF ELEMENTS OF STRUCTURE ETC.
Minimum Provisions when Tested to BS 476: Part 20-23 (mins)
1. Structural frame, beam or column * No requirement No requirement exposed faces
2. Load-bearing wall,Load-bearing wall which is not also an external wall, separating wall, compartment wall or protecting structure (See 4, 5, 6 or 7) * No requirement No requirement each side separately
(a) floor in upper storey of a 2-storey dwelling house (but not over a garage)
30 15 15 from underside (Note 1)
(b) any other floor (including a compartment floor) * * * from underside (Note 1)
4. External walls
(a) any part less than 1m from point on relevant boundary * * * each side separately
(b) any part of the wall of a building used for Assembly purposes which is 1m or more from the relevant boundary and is described in Note 2 * * 15 from inside
* (max. 60) * (max. 60) * (max. 60) from outside
(c) any part 1m or more from the relevant boundary and is not a part de- scribed in (b) above * * 15 from inside
5. Separating wall
each side separately
6. Compartment wall * * * each side separately
7. Protecting structure (any part) * * * each side separately
8. Wall separating an attached or integral garage from a dwelling house * * * from garage side
a. in a separating wall No provision
No provision*** each side separately when fitted in its frame
b. in a compartment wall, if it separates a flat or maisonette from a space in common use No provision 30 No provision*** each side separately
c. in a compartment wall or compartment floor not described in (b) above No provision + No provision*** each side separately
d. in a protecting structure situated wholly or partly above the level of the adjoining ground in a building used for flats, other residential, assembly or office purposes No provision 30 No provision*** each side separately
e. in a protecting structure not described in (d) above No provision
No provision*** each side separately
f. any other door (including a door in a cavity barrier and a door between a dwelling house and garage) No provision 30 No provision*** each side separately when fitted in its frame
10. Casing around a drainage system 30 30 30++ from outside
11. Cavity barriers
a. cavity barrier 1m x 1m or larger 30 30 15 each side separately
b. any other cavity barrier 30 30 No provision each side separately
c. ceiling 30 30 30 from underside
++ = No provision for insulation if the casing is more than 50mm from any pipe in the enclosure (except a pipe passing through the casing)
* = Period of fire resistance as specified
+ = Period of fire resistance for the wall or floor in which the door is situated
** = Half the period of fire resistance for the wall or floor in which the door is situated
*** = This exemption does not apply to fire-rated glass door. A suspended ceiling should only be relied on to contribute to the fire resistance of the floor if the ceiling meets the appropriate provisions given in Table 3.3B.
Any part of the wall which is 7.5m or less above the ground, or above a roof or any other part of the building to which people have access, if the building has 2 or more storeys.
TABLE 3.9A : MAXIMUM NOMINAL DIAMETER OF PIPES
Pipe material and maximum nominal diameter (mm)
Lead, aluminium or aluminium alloy, or UPVC (2)
When the pipes (include pipe supports) penetrate the structure enclosing a protected shaft which is not an exit stairway or lift shaft
100 (stack pipe) (3),(4),(5)
75 (branch pipe) (3),(4),(5)
(1) = A non-combustible material (such as for cast iron or steel pipes and the pipe supports with melting point of at least 1200°C) which if exposed to a temperature of 750°C will not soften nor fracture to the extent that flame or gases will pass through the wall of the pipe.
(2) = UPVC pipes complying with BS 4514 or EN 1329-1.
(3) = Within toilets, wash rooms or external corridors, maximum diameter of UPVC pipes can be increased to double the size given in the above table.
(4) = Within areas of fire risk, such as kitchens, and adjacent to escape routes, UPVC pipes shall be enclosed by construction having fire resistance rating of at least ½ hr.
(5) = Where the size of UPVC pipes exceeds that specified under this clause, approved fire collar shall be fitted at all positions where such pipes pass through constructions required to act as a barrier to fire spread.
TABLE 3.11A : MAXIMUM DIMENSIONS OF CAVITIES
Purpose Group of building or compartment
*Class of surface exposed in cavity
Max. dimension in any direction
Between roof and ceiling
Any other cavity
* = excluding surface of any pipe, cable, conduit or insulation of any pipe
+ = shall not apply to raised floor under Cl.3.11.8
TABLE 3.13A : MINIMUM FLAME-SPREAD CLASSIFICATION OF FINISHES TO WALL, COLUMN, BEAM AND CEILING
Non-sprinkler-protected Building
Sprinkler-protected Building
Room, compartment
Smoke- stop /fire lift lobby
Exit stair- case & exit passageway
PG VIII - Storage
NC = Non-combustible to comply with BS 476 Pt 4
(1) = Applies to detention facilities and healthcare, including hospital, old-aged homes, nursing homes for mentally or physically disabled patients
(2) = BS/EN refers to the following test standards. Meeting an EN standard implies that the corresponding BS standard is complied with but not vice-versa.
EN ISO 1182 + EN ISO 1716
Non-combustibility (NC)
[EN ISO 1182 or EN ISO 1716] + EN 13823
Limited combustibility (LC)
BS 476 Part 11
EN 13823 + EN ISO 11925-2
TABLE 3.13B : MINIMUM FLAME-SPREAD CLASSIFICATION OF MATERIAL CONSTRUCTION (HOMOGENOUS)*
Internal Non-load-bearing Wall and Ceiling
Roof(5) Covering, including Supports
Within Room, Compartment
Within Circulation Spaces(6)
C(1)(4)
(1) = Applies to detention facilities and healthcare, including hospital, nursing homes for handicapped, disabled, aged or persons with mental and/or
(2) = Roof support can be of timber construction. Any use of plastic material for roof shall comply with the requirements in Cl.3.15.19c.(8)
(3) = Limited combustibility tested under BS 476 Part 11 or non-combustibility tested under BS 476 Part 4
(4) = Composite panel complying with ASTM E108 Class A is also acceptable
(5) = Applicable to composite panel roofing only. Refer to Cl.3.14.1 for other roofing materials
(6) = Including common corridor, passageway etc.
(7) = BS/EN refers to the test standards shown in the Note to Table 3.13A. Meeting an EN standard implies that the corresponding BS standard is com- plied with but not vice-versa.
LC = Limited combustibility
* = When composite panels are used for the construction, the minimum flame-spread classification shall be applicable to the core material of the panels
FIRE TESTS AND ACCEPTANCE CRITERIA FOR CONSTRUCTION MATERIALS CONTAINING PLASTIC
TABLE 3.15A : PLASTIC FLOOR MATERIAL/FINISHES
Applicable Fire Test Standards
Smoke classification : s1 rating.
Smoke density, Ds,max < 450
Smoke density, Ds,max < 150
1. Sprinkler-protected premises
(a) Sleeping occupancy : Class Cfl or better
(b) Non-sleeping occupancy : Class Dfl or better
2. Non-sprinkler-protected premises
(a) Sleeping occupancy : Class Bfl or better
(b) Non-sleeping occupancy : Class Cfl or better
Critical Radiant Flux (CRF) > 0.45 W/cm2
TABLE 3.15B : PLASTIC WALL/CEILING MATERIAL/FINISHES
1. Smoke classification to be of s1 rating
2. Flaming droplet classification to be d0 rating
1. Internal wall finishes : to comply with Cl 3.13
2. External wall finishes : to comply with Cl 3.5
To pass criteria in NFPA 285
Test categories D and E are not required for external wall finishes
TABLE 3.15C : PLASTIC ROOF COVERING MATERIAL
Not critical. Generally exposed to external.
1. Generally not critical if exposed to external.
2. If exposed as ceiling on the underside, then must meet requirements for ceiling (achieve s1-d0 rating).
Class BROOF
Class AA/AB/AC
BS 476-6/7
CONDITIONS FOR THE USE OF PLASTIC FLOOR FINISHES (UNCOVERED)
Diagram 3.15.19c.(1) : Plastic floor finishes overlaid on structural floor
TABLE 3.15D : UNCOVERED PLASTIC FLOOR FINISHES
No further fire test is required.
Material thickness not exceeding 10mm
1. No further fire test is required.
2. For sprinkler-protected premises, material not exceeding 20mm can be exempted from the tests in Table 3.15A.
Use in open-to-sky conditions
Use in exit staircase/exit passageways
Key escape routes shall be protected.
Material thickness exceeding 10mm
Allowed if pass test categories A, B and C in Table 3.15A
CONDITIONS FOR THE USE OF PLASTIC MATERIAL CAST INTO (EMBEDDED WITHIN) STRUCTURAL FLOOR SYSTEM
Diagram 3.15.19c.(2) : Plastic material embedded within masonry floor
TABLE 3.15E : PLASTICS EMBEDDED WITHIN MASONRY FLOOR
1. If masonry cover is less than 25mm thick, the material shall pass test categories A, B and C in Table 3.15A.
2. If masonry cover is at least 25mm thick all around the embedded plastic, tests in Table 3.15A are exempted.
3. The locations where embedded plastics are installed shall be clearly indicated on the plans.
CONDITIONS FOR THE USE OF PLASTIC FLOOR FINISHES (COVERED)
Diagram 3.15.19c.(3) : Plastic floor finishes laid on structural floor, and covered by a non-combustible overlay
TABLE 3.15F : COVERED PLASTIC FLOOR FINISHES
Use in open-to-sky conditions.
Use in exit staircase / exit passageways
1. Allowed if pass test categories A, B and C in Table 3.15A.
2. If the overlay is non-combustible and at least 25mm thick, test category C in Table 3.15A is exempted
CONDITIONS FOR THE USE OF PLASTIC WALL FINISHES OR CEILING FINISHES
Diagram 3.15.19c.(4) : Plastic wall or ceiling material/finishes installed internally/externally
TABLE 3.15G : PLASTIC WALL OR CEILING MATERIAL/FINISHES
No further fire test required.
Material thickness not exceeding 1mm
Material thickness exceeding 1mm
Allowed if pass test categories D, E and F in Table 3.15B, unless specifically exempted for external building applications.
CONDITIONS FOR THE USE OF COMPOSITE PANEL WITH PLASTIC USED AS WALL FINISHES OR CEILING FINISHES
Diagram 3.15.19c.(5) : Composite panel with plastic used as wall or ceiling material/finishes installed internally/externally
TABLE 3.15H : COMPOSITE PANEL WITH PLASTIC USED AS WALL OR CEILING MATERIAL/FINISHES
Non-combustible plastic material
Plastic material thick- ness not exceeding 1mm
Use in exit staircase/ exit passageways
Plastic material thickness exceeding 1mm
CONDITIONS FOR THE USE OF PLASTIC MATERIAL EMBEDDED IN MASONRY WALL/CEILING
Diagram 3.15.19c.(6) : Plastic material embedded within wall/ceiling
TABLE 3.15I : PLASTIC MATERIAL EMBEDDED IN MASONRY WALL/CEILING
1. If masonry cover is less than 25mm thick, the material shall pass test categories D, E and F in Table 3.15B.
2. If masonry cover is at least 25mm thick all around the embedded plastic, tests in Table 3.15B are exempted.
CONDITIONS FOR THE USE OF PLASTIC ROOF COVERING
TABLE 3.15J : PLASTIC ROOF COVERING
1. Allowed if pass test category J in Table 3.15C, as well as test category H in Table 3.15C if exposed on underside.
2. Exempted from test categories H and if the requirements specified for skylights in Cl.3.13.5b..
CONDITIONS FOR THE USE OF COMPOSITE PANEL CONTAINING PLASTIC AS ROOF COVERING
TABLE 3.15K : COMPOSITE PANEL WITH PLASTIC USED AS ROOF COVERING
Plastic material thickness not exceeding 1mm
2. Exempted from test categories H and J if the requirements specified for skylights in Cl.3.13.5b..
Clause 3.15
© 2019 Singapore Civil Defence Force Last updated on 26 February 2019