Shanghai OKRO Construction Technology Co., Ltd.

Independent Building
Safety Inspection

Independent Judgment  ·  Objective Conclusions  ·  Citable Facts

OKRO specializes in independent third-party building safety inspection, delivering verifiable technical findings for firestopping and gas suppression system integrity.

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Core Services

Two Core Service Lines

OKRO focuses on the unverified gap between construction completion and functional performance — delivering independent judgment that designers, owners, and inspection authorities can cite with confidence.

01

Firestopping Inspection

Independent assessment of penetrants, materials, and post-construction interference. Focused on the unverified gap between construction complete and function verified. Findings are citable by designers, owners, and inspection authorities.

  • Penetrant-to-Method Compatibility
  • Material Continuity & Integrity
  • Post-Construction Interference
  • Design Assumption Conformance
02

Gas Suppression Integrity Testing

Verifies enclosure airtightness meets design assumptions. Quantifies leakage paths and design deviations. Conducted under controlled conditions without disrupting operations. Provides factual basis for decisions, not a pass/fail label.

  • Enclosure Leakage Characterization
  • Leakage Path Identification
  • Design Deviation Quantification
  • Non-disruptive Testing Protocol
Standards Compliance
ASTM E2174 / E2393 / E3038
Accreditation
IAS Accredited · ILAC-MRA Recognized
Independence
Third-Party · Quantifiable · Traceable
Service 01

Firestopping
Inspection

"In building fire protection, firestopping is rarely the most visible element — yet it often determines the path and consequence of fire spread. When firestopping failures are finally recognized, it is often during post-incident review."

OKRO's inspection is focused on the unverified gap between "construction complete" and "function verified." Our work is not a formal confirmation of construction outcomes — it is an independent judgment on whether firestopping genuinely performs its designed function.

Field Judgment Over Documentation
We focus on whether site conditions genuinely satisfy the prerequisites for that assembly to function.
Appearance Does Not Imply Function
A smooth finish does not guarantee internal material continuity. Partial compliance does not establish overall fire integrity.
Findings Must Carry Citation Value
Our conclusions must be understandable, credible, and citable by designers, owners, and review authorities.
Firestopping inspection — cable penetration with fire-rated sealant
ASTM Standards
E2174 · E2393
Value Proposition

The value of firestopping inspection is not a surface-level "pass" conclusion. It lies in helping decision-makers clearly identify which seals have a credible basis and which locations still constitute a potential risk.

✔
Credible seals identified
⚠
Risk locations flagged

Core Assessment Criteria

01
Penetrant-to-Method Compatibility
Whether the penetrant type is compatible with the firestopping method applied.
02
Material Continuity & Integrity
Whether sealant is continuous and complete, with no gaps, breaks, or localized failure.
03
Post-Construction Interference
Whether the sealed penetration has been damaged, weakened, or disturbed by subsequent works.
04
Design Assumption Conformance
Whether site conditions match original design assumptions and intended use scenarios.

Application Scenarios

Data Centers, Server Rooms & Electrical Rooms
Critical infrastructure where compartmentalization integrity directly affects loss outcomes.
High Fire-Rating Buildings & Critical Spaces
Design-specified fire compartments must be genuinely established on site.
Projects Requiring Independent Verification
Providing owners, insurers, and review authorities with objective, citable technical findings.
Service 02
Data center with gas suppression system
ASTM E3038
⚠
Common Misconceptions
✕Equipment installed and control logic integrated — system considered complete
✕Actual discharge testing rarely performed on site
✕Enclosure airtightness — whether it meets design requirements — is almost never independently verified

Gas Suppression
Integrity Testing

"System activation does not equal effective suppression. The core question: after agent discharge, can the protected enclosure maintain the required design concentration for the specified hold time?"

OKRO's integrity testing verifies whether the prerequisite for effective gas suppression is met — not whether equipment is installed, but whether the enclosure condition is established. A fully equipped system does not mean the space can maintain sufficient agent concentration.

1
Complete Configuration ≠ System Effectiveness
Equipment completeness does not guarantee the space can maintain sufficient agent concentration.
2
Testing Without Disrupting Operations
At critical facilities such as data centers, testing is conducted under controlled conditions to minimize operational impact.
3
Findings Must Support Real Decisions
Conclusions must directly support decisions on remediation, optimization, or risk acceptance.
The Core Question

"When a real fire occurs — will this system perform as the design intended?"

Testing Process

01
Enclosure Leakage Characterization
Measure and analyze the overall leakage rate of the building envelope.
02
Leakage Path Identification
Identify potential leakage paths at doors, windows, gaps, and penetrations.
03
Design Deviation Quantification
Quantify the deviation between actual airtightness and the design model.

Application Scenarios

Data Centers & Server Rooms
The primary environment for gas suppression systems — enclosure airtightness directly affects suppression effectiveness.
High-Value Equipment Protection Areas
High equipment value and significant downtime costs demand a clear understanding of system effectiveness.
Projects Requiring Proof of Effectiveness
Providing owners, review authorities, and insurers with objective, citable technical evidence.
Accreditation & Standards

Internationally
Recognized Certification

OKRO leverages internationally recognized certification systems to provide verifiable technical support for building safety inspection. Our accreditation ensures that findings are not merely filed as records — they carry the weight of internationally recognized verification.

IAS — International Accreditation Service
Accredited By
International Accreditation Service
ILAC-MRA — International Laboratory Accreditation Cooperation
Signatory To
ILAC Mutual Recognition Arrangement
IAS Accreditation
International Accreditation Service accreditation provides internationally recognized validation of our technical competence and operational integrity.
ILAC-MRA Recognition
Membership in the International Laboratory Accreditation Cooperation Mutual Recognition Arrangement ensures our results are accepted globally.
ASTM Standards
All testing conducted in accordance with ASTM international standards: E2174, E2393, and E3038 — the definitive benchmarks for building safety inspection.
Quantifiable & Traceable
Third-party independent verification with results that are quantifiable, traceable, and suitable for citation by regulatory and review authorities.
Structural architecture — precision and integrity
Our Positioning

"Defining Risk —
Not Endorsing Outcomes"

ASTM Standards Applied
ASTM E2174
Standard Practice for On-Site Inspection of Installed Fire Stops
Firestopping Inspection
ASTM E2393
Standard Practice for On-Site Inspection of Installed Fire Resistive Joint Systems
Firestopping Inspection
ASTM E3038
Standard Practice for Door-Fan Pressure Testing of Gas Fire Suppression Systems
Gas Suppression Testing
Get In Touch

Request an
Inspection Plan

Contact us for an inspection plan tailored to your project. OKRO provides independent third-party building safety inspection services with findings that are objective, quantifiable, and citable.

Location
Shanghai, China
上海欧克罗建筑科技有限公司
Accreditation
IASILAC-MRA
IAS Accredited
ILAC-MRA Signatory

Or email us directly at [email protected]