The Ultimate Guide to SCDF Mezzanine Requirements: Fire Code 2023 & BCA Guide
Section 1: Maximising Space in Singapore—The High-Stakes World of Mezzanine Floors
1.1 The Business Imperative: Unlocking Vertical Space
In the high-density urban environment of Singapore, industrial and commercial real estate is a finite and costly resource.
For businesses operating in factories, warehouses, and retail units, optimising every square metre is not merely an efficiency goal but a core component of financial viability.
Against this backdrop, mezzanine floor construction presents itself as one of the most cost-effective and operationally intelligent solutions for space expansion.1
A mezzanine floor, defined as an intermediate floor positioned between the primary floors of a building, effectively unlocks the potential of unused vertical volume.
It allows a business to create new, usable square footage for storage, light production, or ancillary office space without the prohibitive expense or logistical impossibility of expanding the building’s physical footprint.3
This vertical expansion strategy is a powerful tool for business optimization, enabling companies to scale their operations within their existing premises.
However, the perceived simplicity of installing a mezzanine—often viewed as “just an extra platform”—belies its legal and technical complexity.
In the eyes of Singapore’s regulatory authorities, a mezzanine is not “extra space”; it is a significant “building work” 1 that fundamentally alters the structure, fire safety, and occupant load of the building.
1.2 The Cautionary Tale: The 2025 Toa Payoh Collapse
The potential consequences of misunderstanding this complexity were brought into sharp focus by a catastrophic incident in early 2025.
On January 28, 2025, a mezzanine floor within a warehouse unit at 11 Toa Payoh Industrial Park suddenly gave way, collapsing onto the space below and trapping three workers under a mass of storage racks and rugs.5
Subsequent investigations by multiple government agencies revealed this was not a random accident but a direct result of a profound compliance failure.1
The Building and Construction Authority (BCA) issued a statement confirming a critical fact: it “did not receive any applications for the installation of the steel platform and racking system on the premises”.6
Concurrently, the Singapore Civil Defence Force (SCDF) launched its own investigation into the tenant for the “failure to obtain the fire safety certificate with respect to the fire safety work done on site”.7
This incident serves as a stark and sobering case study, demonstrating the physical manifestation of a procedural failure.
The owner, or the vendor they engaged, had bypassed the one and only legal pathway for such construction: the engagement of a Qualified Person (QP).1
A QP, who must be a registered architect or professional engineer, is legally required to prepare and submit plans to both the BCA for structural safety and the SCDF for fire safety.
The Toa Payoh collapse proves that unapproved works are not merely a “paper” violation.
They are physically dangerous structures that have not been vetted for load-bearing capacity or fire safety, posing a direct threat to life.
The legal penalties are severe, including fines of up to $200,000 or a jail term of up to two years for the unauthorised structural works 6, and additional fines of up to $10,000 for failing to obtain the Fire Safety Certificate (FSC).7
1.3 Framing the Solution: The Multi-Agency Compliance Path
This report provides a comprehensive technical and regulatory guide for business owners, factory managers, and the Qualified Persons they must engage.
Its purpose is to demystify the compliance process and detail the exacting requirements set forth by the authorities, with a primary focus on the SCDF Fire Code.
A common misconception is that mezzanine approval is solely an SCDF matter. This is incorrect.
The construction of a legal, safe mezzanine in Singapore is a complex, multi-agency affair that requires navigating an interconnected framework of regulations.
A successful project must secure approvals from, or comply with the regulations of, four distinct authorities 2:
- Singapore Civil Defence Force (SCDF): Responsible for fire safety. SCDF ensures the mezzanine complies with the Fire Code, specifically regarding means of escape, fire resistance, and firefighting systems.1
- Building and Construction Authority (BCA): Responsible for structural safety. BCA ensures the mezzanine’s design, materials, and load-bearing capacity comply with the Building Control Act.1
- Urban Redevelopment Authority (URA): Responsible for land use and planning. URA governs the building’s total Gross Floor Area (GFA) and plot ratio, which a mezzanine floor will increase.2
- Jurong Town Corporation (JTC): Applicable for properties on JTC land. JTC acts as the landlord and must provide consent, ensuring the new structure aligns with industrial zoning and usage policies.2
This guide will serve as a definitive map to this compliance journey, focusing on the granular details of the SCDF Fire Code 2023, while integrating the critical structural and planning requirements from its partner agencies.
Section 2: The First Critical Question: Is It a Mezzanine, an Equipment Platform, or Racking?
2.1 Why This Distinction Governs Your Entire Compliance Journey
Before a single technical drawing is drafted, the business owner and their engaged Qualified Person (QP) must answer one fundamental question: what is the legal classification of the structure being proposed?
This is the single most important decision in the project’s lifecycle.
The answer—whether it is a “mezzanine floor,” an “equipment platform,” or a “racking-supported platform”—will dictate the entire regulatory path, the cost, the timeline, and the ultimate legality of the construction.
An underlying principle in Singapore’s building regulations is the primacy of function over form.
The name a business assigns to its structure (e.g., “storage platform,” “work deck”) is irrelevant to the authorities.
Regulation is based on the structure’s intended use and its physical characteristics.12
2.2 Defining a “Mezzanine Floor” (The Regulated Structure)
A mezzanine floor is a “building work”.1 It is a permanent or semi-permanent intermediate floor constructed between the main storeys of a building.13
- SCDF Definition (Prescriptive): The SCDF Fire Code 2023 does not provide a simplistic dictionary definition in Clause 1.4.16 Instead, it defines a mezzanine floor by the comprehensive rules it imposes on it. Clauses such as 9.6.1a(2) in Chapter 9, which apply strict controls on area, use, and construction, effectively create a prescriptive legal definition for what SCDF considers a mezzanine.12
- BCA/URA Definition (Structural & Spatial): From a BCA and URA perspective, a mezzanine is a new floor level. It is part of the building’s permanent structure, supported by columns and beams 17, and is considered a portion of the storey below.13 Crucially, it is classified as “additional floor space” and is counted towards the building’s total Gross Floor Area (GFA) and plot ratio.10
Compliance Trigger: Classifying a structure as a “mezzanine floor” is the primary trigger for the full, multi-agency submission process. It requires mandatory plan submissions to BCA (for structural integrity) and SCDF (for fire safety), and its GFA must be cleared by URA.2
2.3 Defining an “Equipment Platform” (The “Equipment”)
A structure may be legally classified as an “equipment platform” if it meets a very strict definition.
It is defined as an “unoccupied, elevated platform used exclusively to store and provide access to mechanical systems or industrial equipment”.4
This is a critical legal and financial distinction. An equipment platform is treated as equipment, much like a piece of machinery, rather than as a floor.3
- Key Distinctions:
- Use: It is “unoccupied” (i.e., not for permanent workstations) and only for supporting equipment.
- GFA: It is not considered part of the building’s GFA.4
- Fire Area: It is not included in the building’s fire area calculation.14
Compliance Trigger: An equipment platform does not require the same full BCA/SCDF/URA submission as a mezzanine. It has a much less stringent permitting process.14
However, it is not unregulated. It must still be structurally sound for its purpose, and if the building is protected by an automatic sprinkler system, sprinkler coverage must be extended to the area beneath the platform.14
2.4 The Grey Area: Rack-Supported Platforms
This is the most common and dangerous area of non-compliance, as seen in the Toa Payoh incident.
A business installs a pallet racking system and then has the vendor install a “floor” on top of the racking components, using the racks themselves as the support columns.15
This is often marketed as a “rack-supported mezzanine” or “storage platform,” and a business owner may be led to believe it is “equipment” or “furniture” and thus exempt from regulation. This is a critical error.
The “function over form” principle applies here.
If that rack-supported platform is used for any purpose that defines a mezzanine—such as an “ancillary office” or general “store” 12—the SCDF and BCA will regulate it as a full mezzanine floor.
This creates a compliance paradox. The structure is legally a “mezzanine,” but it has been constructed from “racking.”
This means:
- BCA (Structural): A QP (Professional Engineer) must be able to certify the racking system as a building structure, compliant with the Building Control Act and able to support all loads. Most racking systems are not designed for this.
- SCDF (Fire Safety): The entire structure, including the racking components used as “columns” and “beams,” must meet the 1-hour fire resistance rating mandated by the Fire Code.12 This is virtually impossible for standard, unprotected pallet racking.
The Toa Payoh collapse, which involved a “steel platform” and “racking system” 5, is the definitive example of this failed “grey area” logic.
Classifying the structure correctly from day one is the only way to avoid catastrophic legal and physical failure.
Section 3: SCDF Fire Code 2023: Core Requirements by Purpose Group (Chapter 9)
Once a structure is correctly identified as a “mezzanine floor,” its design is governed by a prescriptive set of rules within the SCDF Fire Code 2023.
These rules are found in Chapter 9, “Additional Requirements for Each Purpose Group,” and vary depending on the building’s use.
3.1 The “Prescriptive Box”: Purpose Group VI (Factory) & VIII (Warehouse)
The most common and detailed rules apply to industrial spaces.
For buildings under Purpose Group VI (Factory) and Purpose Group VIII (Warehouse/Storage), the Fire Code provides a highly specific “prescriptive box.”
This “box” is outlined in Clause 9.6.1a.(2) (for factories) and the nearly identical Clause 9.8.1a.(2) (for warehouses).
If a proposed mezzanine design fits perfectly within these limitations, it is granted a significant concession: the ability to be served by a single open staircase rather than multiple, enclosed, fire-protected exit staircases.12
The six core requirements of this “prescriptive box” are:
- Aggregate Floor Area (AFA): The aggregate AFA of the mezzanine floor (or floors) within that single factory/warehouse unit shall not exceed 60m² (approximately 645 square feet).12
- Permitted Use: The mezzanine floor shall only be used for “store and/or ancillary office”.12 Using it for any other purpose, such as primary production or public access, voids this compliance path.
- Staircase: The single open staircase must have a width of at least 1m and be “constructed of non-combustible materials”.12
- Structural Fire Resistance: The “elements of structure of the mezzanine floor(s)” must be of “at least 1-hr fire resistance rating construction”.12 This is a non-negotiable structural requirement that will be detailed in Section 4.
- Habitable Height: The habitable height of the mezzanine floor itself shall not exceed 24m from the ground level.12
- Travel Distance: The layout of the mezzanine and its stair must ensure that the “maximum travel distance measured from remote point on the mezzanine floor(s) to the exits complies with Table 2.2A”.12 This will be detailed in Section 5.
Failure to meet even one of these six conditions invalidates the use of the single open staircase and pushes the project into a much more complex and costly compliance category.
3.2 Critical Definition: What is an “Ancillary Office” (Clause 1.4.4)?
The “ancillary office” use-case is a key legal constraint within the prescriptive box. The Fire Code 2023 provides a specific legal definition in Clause 1.4.4.
An “Ancillary office” refers to “any office which supports the activities of a building within Purpose Groups III, V, VI, VII and VIII and which is located within the same building or compartment as the purpose group it serves”.16
This definition is restrictive. A business cannot build a 60m² mezzanine in its Purpose Group VI factory and then sublet that office space to an unrelated accounting firm (which would be Purpose Group IV).
The ancillary office must be directly related to and supportive of the primary factory or warehouse operations.
This definition is also what separates a mezzanine from an “equipment platform,” as an ancillary office is an occupied space.
3.3 Table: SCDF Mezzanine Compliance Cheat Sheet (Purpose Group VI & VIII)
For a Qualified Person or business owner to quickly assess the feasibility of a proposed mezzanine in a factory or warehouse, the following table synthesizes the core requirements from Chapters 2, 3, 6, and 9 of the Fire Code 2023, including the latest amendments.
| Requirement | SCDF Fire Code 2023 Specification (PG VI & VIII) | Relevant Clause(s) |
| Max. Floor Area (AFA) | $60m^2$ (aggregate) | 9.6.1a(2)(a), 9.8.1a(2)(a) |
| Permitted Use | Store and/or Ancillary Office | 9.6.1a(2)(f), 9.8.1a(2)(f) |
| Structural Fire Resistance | 1-hour rating (for mezzanine and all supporting elements) | 9.6.1a(2)(d), 3.3.1c |
| Staircase (Single Open) | Permitted if: Min. 1m width, Non-combustible materials | 9.6.1a(2)(b), 3.15 |
| Max. Habitable Height | 24m | 9.6.1a(2)(e) |
| Travel Distance | Must comply with Table 2.2A (see Section 5) | 9.6.1a(2)(c), 2.2.6 |
| Sprinklers | Must be extended under mezzanine if building is sprinklered | 6.4 (General), 32 |
| Manual Call Point | Exempt (Eff. 1 Mar 2026) if $<30m$ travel to main floor’s | 6.3.3d 35 |
| Hose Reel | Exempt (Eff. 1 Mar 2026) if $<36m$ total coverage to main floor’s | 6.2.8a 35 |
| Landing Valve | Exempt (Eff. 1 Mar 2026) if $<38m$ total coverage to main floor’s | 6.2.2c 35 |
3.4 Purpose Group V (Shop) & II (Office)
It is a common error to assume the 60m² “prescriptive box” applies universally. It does not.
When examining the clauses for Purpose Group V (Shop) or Purpose Group II (Office), the Fire Code does not contain the same 60m² prescriptive path for mezzanines.20
While Clause 9.5.1a discusses exit requirements for shop floors, it does not provide the specific concession for a single-stair mezzanine based on a 60m² area.20
This implies that a mezzanine in a retail shop or a commercial office is not constrained by a 60m² limit, but it is also not granted the 60m² concession of a single stair.
Instead, a mezzanine in these spaces is governed by the general (and more stringent) rules of the Fire Code:
- Compartmentation (Clause 3.2): The mezzanine and the main floor may be viewed as a single compartment, which must adhere to the size limitations in Table 3.2A.24
- Occupant Load (Chapter 2): The occupant load of the mezzanine must be calculated and added to the main floor’s load.25
- Means of Escape (Chapter 2): The mezzanine would be subject to the standard rules for escape, which typically require “remotely located” exits.26 A large mezzanine in a shop, for example, would almost certainly require two remote, and likely protected, exit staircases, making the project significantly more complex and expensive.
Section 4: Structural Fire Precautions (Fire Code Chapter 3): Building to Last
Beyond the specific rules of Chapter 9, any mezzanine must comply with the foundational rules of structural fire safety in Chapter 3 of the Fire Code.
This section details the requirements for fire resistance and material selection.
4.1 The 1-Hour Fire Resistance Rule (Clause 3.3)
This is the most critical and often most costly structural fire safety requirement.
Clause 9.6.1a(2)(d) for factories and 9.8.1a(2)(d) for warehouses explicitly mandate that the “elements of structure of the mezzanine floor(s)” shall have at least a 1-hour fire resistance rating.12
This requirement is then amplified by Clause 3.3.1c. This clause establishes a “flow-down” principle of fire resistance:
“Any column or beam which gives support to a wall or gallery… e.g. column and beam supporting the… mezzanine floor shall have the same fire resistance as that required for the… mezzanine floor”.17
The implication is comprehensive. It is not sufficient for only the mezzanine floor slab to be 1-hour rated. This 1-hour fire resistance requirement “flows down” to every structural component that supports it. This includes:
- The new beams and columns installed to create the mezzanine.
- Any existing building columns or walls that these new beams transfer their load to.
Furthermore, SCDF clarifies that the mezzanine floor and its open staircase must be of “fire resistant construction, similar to the compartment floor”.12
This ensures the mezzanine does not create a point of structural weakness that would collapse prematurely in a fire, hindering evacuation and firefighting efforts.
4.2 Non-Combustible Materials (Clause 3.15)
The Fire Code is equally prescriptive about the materials used.
The open staircase mandated for the 60m² prescriptive box must be “constructed of non-combustible materials”.12
This is reinforced by Clause 3.15.5, which explicitly prohibits a common cost-cutting shortcut. The code states:
“…for construction of mezzanine floor, flame retardant chemicals shall not be used to treat the timber members or other combustible materials to meet… fire resistance rating requirements respectively”.27
This means the 1-hour fire rating cannot be achieved by simply painting a timber structure with fire-retardant paint.
The structure itself must be inherently non-combustible. In practice, this means the mezzanine’s primary structure must be:
- Structural Steel: Protected to achieve a 1-hour rating, typically through fire-rated boards or certified intumescent paint.2
- Reinforced Concrete: Which inherently has a fire resistance rating.
Any attempt to use timber for the primary structure of a new mezzanine in a PG VI or VIII unit is a direct violation of Clause 3.15.5.
4.3 Fire Compartmentation
The 60m² “prescriptive box” mezzanine is designed to exist within a single, larger fire compartment (i.e., the factory or warehouse unit).12
The construction of the mezzanine must not compromise the integrity of this primary compartment.
This means that any 1-hour fire-rated compartment walls or floors that separate the tenancy unit from its neighbours or other floors must remain fully intact.12
The mezzanine’s structure cannot create unsealed openings or structural weaknesses in these critical compartment lines.
Section 5: Means of Escape (Fire Code Chapter 2): Ensuring a Safe Evacuation Path
The SCDF’s primary mandate is life safety. Therefore, the most rigorous scrutiny is applied to the “Means of Escape,” governed by Chapter 2 of the Fire Code.
A mezzanine fundamentally alters the escape path for occupants, introducing new challenges that the code directly addresses.
5.1 Travel Distance (Clause 2.2.6 & Table 2.2A)
The code mandates that the “maximum travel distance measured from remote point on the mezzanine floor(s) to the exits complies with Table 2.2A”.12
A common misinterpretation is to measure this distance only from the top of the stair. This is incorrect.
The SCDF’s interpretation is clarified in Figure 2.2.6g 29, which states that the measurement is “from the most remote point of the ancillary office on mezzanine level to the exit door on the main storey level of factory”.29
This “total path” measurement is comprehensive. It is the actual path an occupant must walk:
- From the most remote point on the mezzanine (e.g., a desk) to the top of the open stair.
- Down the stair to the main floor.
- Across the main factory or warehouse floor, navigating any partitions or machinery.
- To the final, protected exit door of the unit.
This entire path must be less than the maximum travel distance specified in Table 2.2A.
For a typical sprinkler-protected factory (PG VI), the maximum two-way travel distance is 60m.30
The QP must design the mezzanine’s location and its staircase to ensure this total path is compliant.
5.2 The “Common Path of Travel” Limitation (Clause 2.3.1c)
A “common path of travel” (also known as one-way travel) exists when an occupant in a space has only one direction of travel available to reach an exit or a point where they have a choice of two remote exits.26
A mezzanine with a single staircase is the textbook definition of a common path.
Every occupant on that mezzanine has only one way out: that single stair.
The Fire Code places strict limits on the length of this common path, which are also specified in Table 2.2A.26
This limitation is the fundamental principle that underpins the 60m² prescriptive box.
SCDF’s technical analysis has effectively pre-calculated that for a small ancillary office or storage area of 60m² or less, the resulting common path of travel will be acceptably short.
This leads to the “second exit trigger.” As noted in the SCDF’s official illustrations (Figure 9.6.1a.(2) – 3), if “The allowable common path of travel were exceeded, the mezzanine would require a second remote exit access”.12
This explains the consequence of non-compliance with the 60m² rule.
If a business insists on a 100m² mezzanine, their QP must inform them that it has failed the “prescriptive box” and is now subject to the general rules.
This will immediately trigger the requirement for a second, remote staircase, which must also be designed to comply with travel distance rules.
This dramatically increases the cost, complexity, and GFA impact of the project.
5.3 Mezzanine Staircase Design (Clause 9.6.1a(2)(b))
The design of the single open staircase is explicitly detailed in the code:
- Width: It must have a width of “at least 1m”.12 This is wider than the 900mm permitted for internal stairs in residential maisonettes, signifying its role as a commercial means of escape.29
- Materials: It must be “constructed of non-combustible materials” 12, in line with the structural requirements of Chapter 3.
Section 6: Firefighting Systems (Fire Code Chapter 6): Detection and Suppression
Adding a new physical level within a compartment critically impacts the performance of existing fire protection systems.
It is a dangerous, and illegal, oversight to build a mezzanine without addressing the building’s sprinklers and alarms.1
6.1 Automatic Fire Sprinkler Systems (Clause 6.4)
If a building is already equipped with an automatic fire sprinkler system (which is mandatory for most large industrial buildings in Singapore 30), the installation of a mezzanine floor creates a new, solid obstruction.1
The existing sprinkler heads on the ceiling above the mezzanine are now blocked, rendering them incapable of suppressing a fire that starts under the mezzanine.1
Therefore, it is a mandatory requirement to extend the existing sprinkler system.16
New sprinkler heads must be installed on the underside of the mezzanine floor, ensuring complete and unobstructed coverage for the space created below.32
Furthermore, the addition of a mezzanine and its contents (e.g., office furniture, stored goods) adds to the total fire load of the compartment.
In the rare case of a non-sprinklered building, adding a large mezzanine could push the compartment’s size or fire load beyond the limits, triggering the requirement for a new sprinkler system to be installed.12
6.2 Fire Alarms and Smoke Detectors (Clause 6.3)
The same logic applies to the building’s automatic fire alarm system.34
A fire starting under the mezzanine would produce smoke that is trapped by the new floor, preventing it from reaching ceiling-mounted detectors.
To ensure early warning, the detection system must also be extended.1
This typically involves installing new smoke or heat detectors on the underside of the mezzanine, wired into the building’s main fire alarm panel.1
Depending on the ceiling height above the mezzanine and its use, detectors may also be required on the mezzanine level itself.
6.3 CRITICAL UPDATE: The 2025/2026 Fire Code Amendments
On September 1, 2025, the SCDF issued a circular (AMENDMENTS TO FIRE CODE 2023 – 4th BATCH OF AMENDMENTS) that introduced significant, high-value revisions, particularly for mezzanine floors.35
These amendments, which take full effect on March 1, 2026 (but can be adopted by QPs from September 1, 2025), represent a risk-based relaxation of the rules for compliant mezzanines.35
The SCDF has officially recognized that for a small (i.e., $\leq$ 60m²) mezzanine in a factory or warehouse that meets all the conditions of 9.6.1a(2) or 9.8.1a(2), forcing the installation of duplicate firefighting hardware on the mezzanine itself is often redundant, provided the occupants have easy access to the systems on the main floor.
This circular grants the following new exemptions for these specific mezzanines 35:
- Manual Call Points (Clause 6.3.3d): Manual call points can be omitted from the mezzanine floor, provided that no person on the mezzanine needs to travel more than 30m to activate the nearest manual call point located on the main floor.35
- Hose Reels (Clause 6.2.8a): A hose reel is not required to be installed on the mezzanine, provided that the nearest hose reel on the main floor can cover the mezzanine’s most remote point. The coverage distance is a maximum of 36m (calculated as a 30m hose path and a 6m throw).35
- Landing Valves (Clause 6.2.2c): A landing valve is not required on the mezzanine, provided that the nearest landing valve on the main floor can cover the most remote point. The coverage distance is a maximum of 38m (calculated as a 30m hose line length and an 8m jet throw).35
These amendments provide significant cost and design flexibility for businesses, but they are contingent on strict compliance with the 60m² “prescriptive box” and the new travel distance calculations for firefighting equipment.
Section 7: The Submission Gauntlet: This is NOT Just an SCDF Problem
A critical failure point for many businesses, including the one in Toa Payoh, is the misunderstanding of the submission process.
A mezzanine project cannot be started by simply calling a contractor.
It is a major Addition & Alteration (A&A) work that requires a formal, multi-stage submission process managed by a Qualified Person.1
7.1 The Non-Negotiable First Step: Engage a Qualified Person (QP)
Before any financial or contractual commitments are made, the business owner’s first and most important action is to engage a Qualified Person (QP).2
A QP is a registered Architect or Professional Engineer (PE) licensed to practice in Singapore.
Under the Fire Safety Act, only a QP is legally authorised to prepare and submit the required plans to the SCDF and BCA.8
The QP serves as the single point of responsibility, ensuring the project is designed and built in compliance with all relevant codes.
Attempting to bypass the QP is illegal and, as the Toa Payoh case demonstrated, lethally dangerous.6
7.2 Step 1: URA & JTC (The “GFA and Landlord” Gate)
The QP’s first check is not structural; it is administrative.
- URA (Urban Redevelopment Authority): A mezzanine floor is “additional floor space” 11 and is therefore chargeable Gross Floor Area (GFA).10 The QP must verify with URA that the building has not already reached its maximum-allowed plot ratio. If the building is already at its GFA limit, no new mezzanine can be legally added, and the project is non-viable from the start.2
- JTC (Jurong Town Corporation): If the property is on JTC land, JTC acts as the master landlord. The QP must make a submission to JTC to obtain their consent, ensuring the new structure and its use align with JTC’s industrial policies.2
7.3 Step 2: BCA (The “Structural Safety” Gate)
Once GFA availability is confirmed, the QP (specifically a Professional Engineer) will prepare the Structural (ST) submission for the BCA (Building and Construction Authority).1
This is a highly technical submission that includes detailed engineering drawings and calculations to prove:
- Mezzanine Safety: The new structure (whether steel or concrete) is designed to local standards (e.g., SS EN 1993 for steel) and can safely support its intended loads (e.g., storage, office occupants).1
- Building Safety: The existing building’s columns, floors, and foundations can safely handle the additional load being transferred from the new mezzanine.1
This is the specific approval that was skipped in the Toa Payoh collapse, leading to the use of a structure with inadequate load-bearing support.1
7.4 Step 3: SCDF (The “Fire Safety” Gate)
After the BCA has deemed the structure sound and issued its approval, the QP can then proceed with the Building Plan (BP) and Fire Protection (FP) Plan submission to SCDF.2
SCDF will not approve a fire safety plan for a structure that has not first been cleared as structurally sound by the BCA.
The SCDF submission will be vetted against every requirement detailed in this report, including:
- Chapter 9: Compliance with the 60m² box (AFA, use, stair).
- Chapter 3: 1-hour fire resistance and non-combustible materials.
- Chapter 2: Travel distance and common path compliance.
- Chapter 6: Extension of sprinklers, alarms, and other firefighting systems.
7.5 Step 4: Build, Inspect, and Certify
Only after receiving Approval of Plans from all agencies can construction legally begin. The work must be carried out exactly as detailed in the approved plans.
Upon completion, the QP and a Registered Inspector (RI) (an independent third-party checker) will inspect the works.32
If the built structure conforms to the approved plans, the RI and QP will issue their certifications to SCDF. The SCDF will then issue the Fire Safety Certificate (FSC).1
This FSC is the final, non-negotiable document. Operating the business on the mezzanine (or even in the unit) without a valid FSC is illegal and was the second offence committed in the Toa Payoh incident.7
Section 8: The “Minor A&A” Trap: A Common and Costly Misconception
8.1 What is the MAA Lodgement Scheme?
The SCDF provides a streamlined process for very simple building works, known as the “Minor Addition / Alteration” (MAA) lodgement scheme.36
This scheme allows a QP to “lodge” plans for works that are truly minor, such as “erection or deletion of internal partitions” made of lightweight, non-combustible materials.37
For these simple works, a full, formal approval process is not required, saving time and cost.38
8.2 Why a New Mezzanine is NEVER a “Minor A&A”
A common and dangerous trap is when an unscrupulous contractor, in an attempt to win a bid by promising a low-cost, “no-hassle” job, tells a business owner that their new mezzanine can be submitted as a “Minor A&A.”
This is unequivocally false. The MAA lodgement scheme only applies to works that “must not affect the fire compartmentation and means of escape provisions, or pose additional fire hazard to the building”.37
A new mezzanine floor is a major A&A work. By its very nature, it fundamentally and critically affects all of these protected items 8:
- Structural Load: It adds significant weight to the building (a BCA matter).
- Fire Compartmentation: It introduces a new, habitable level and fire load into the compartment.8
- Means of Escape: It adds occupants and creates new, complex travel paths (e.g., a common path).8
- Fire Protection Systems: It directly obstructs existing sprinklers and detectors, requiring their alteration.8
Therefore, any new mezzanine floor always requires a full plan submission to both BCA and SCDF.
Any contractor or consultant suggesting the MAA path should be viewed as a major red flag, as they are advising a course of action that is non-compliant and dangerous.
Section 9: Conclusion: Expert Recommendations for Business Owners & QPs
The construction of a mezzanine floor is a sound business decision for optimising space in Singapore, but it is a high-stakes engineering and legal endeavour.
The complex and interconnected regulations from SCDF, BCA, and URA are not “red tape” but a critical safety system designed to protect lives and property.
The 2025 Toa Payoh collapse serves as a permanent, tragic reminder of the consequences of bypassing this framework.
For business owners, landlords, and the Qualified Persons advising them, the path to a safe, legal, and functional mezzanine floor is one of absolute compliance.
9.1 Summary: The 5-Step Path to a Safe & Legal Mezzanine
Based on a comprehensive analysis of the Fire Code 2023 and the multi-agency submission process, the only correct methodology is as follows:
- Engage a Qualified Person (QP): This is the non-negotiable first step. Do not engage a contractor or purchase materials before a QP (Architect or Professional Engineer) is on board. The QP is the only party legally authorised to manage the submission process.2
- Define the Structure & Use: The QP must, as a first action, legally classify the proposed structure. Is it a true “equipment platform” 4 or is it a “mezzanine floor”?1 If the latter, what is its use? This determination (e.g., “ancillary office” 16) will dictate all subsequent rules.
- Perform Multi-Agency Feasibility: Before technical design, the QP must clear the administrative hurdles. This means confirming available GFA with URA 10 and, if applicable, securing landlord consent from JTC.2 If GFA is not available, the project must stop.
- Design for Full Compliance: The design must adhere to all codes. For industrial use, this means fitting perfectly into the SCDF “prescriptive box” (e.g., $\leq 60m^2$, 1-hour fire resistance, 1m non-combustible stair) to leverage the single-stair concession.12 The design must also satisfy all BCA structural codes.1
- Submit, Approve, Build, Certify: The QP must follow the correct submission sequence: URA/JTC, then BCA (Structural), then SCDF (Fire Safety).2 Construction must only begin after all approvals are granted. The final build must be inspected and certified to receive the Fire Safety Certificate (FSC).8
9.2 Final Thoughts: Lessons from Toa Payoh
The Toa Payoh collapse was a predictable, and entirely preventable, outcome of ignoring this 5-step process.6
The regulations are a complete safety system. The URA rules on GFA prevent overcrowding. The BCA rules on structural design prevent collapse.1
The SCDF rules on fire resistance, materials, and escape routes ensure that occupants can get out safely in a fire.2
Ultimately, compliance is not a cost to be minimised. It is a non-negotiable investment in the safety of personnel, the protection of property, and the long-term legal continuity of the business.
Works cited
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