Smoke net is a high performance mesh barrier engineered to contain and channel smoke during fire events. It is installed within building service shafts, atriums, and stairwells to protect life and support evacuation strategies.
Design teams use smoke net in conjunction with pressurization and ventilation systems to maintain safe egress routes. This article explores technical roles, installation considerations, and operational behaviors in modern buildings.
| Product Name | Mesh Type | Fire Rating | Max Seam Opening | Typical Use Case |
|---|---|---|---|---|
| Aegis Smoke Guard NX | Metallic composite | 90 minutes EN 13501-1 | ≤ 3 mm | High-rise elevator shafts |
| Vanguard FlexiSmoke | Intumescent polymer | 60 minutes UL 10C | ≤ 5 mm | Atrium smoke reservoir |
| Nimbus AeroWeave Lite | Glass fiber fabric | 30 minutes BS 476 | ≤ 8 mm | Historic retrofit stairs |
| CoreSafe RibbonMesh Pro | Stainless steel mesh | 120 minutes UL 10C | ≤ 2 mm | Industrial duct enclosures |
Smoke Net Technical Performance
Material Composition and Fabrication
Smoke net is typically woven from stainless steel, bronze, or coated glass fiber threads to achieve defined aperture sizes and flow resistance. The manufacturing process controls twist, tension, and seam integrity to meet classification test criteria without adding excessive weight to the structure.
Pressure Differential and Flow Characteristics
During a fire, pressure differences drive smoke movement through the mesh. Designers reference pressure drop curves at specified velocities to ensure the mesh limits velocity loss while preserving smoke layer separation in shafts and lobbies.
Smoke Net Installation Best Practices
Integration with Shaft Design
Clearance between the mesh and shaft walls must match standards to avoid friction losses or accidental contact. Edge profiles and mounting frames should distribute loads evenly across fire-rated joints and junctions.
Coordination with Life Safety Systems
Correct coordination with smoke extraction, pressurization, and alarm systems prevents cross contamination of air streams. Commissioning tests verify that damper positions and fan curves align with the intended smoke reservoir volumes.
Smoke Net Compliance and Certification
Regional Standards and Testing Protocols
Certification programs reference standards such as EN 13501-1, UL 10C, and BS 476, each specifying duration, temperature curve, and integrity criteria. Third party test reports validate that the installed configuration matches the certified sample in a controlled tunnel environment.
Documentation and Traceability
Suppliers provide detailed datasheets covering temperature limits, load deformation, and maintenance intervals. Building logbooks should store certification labels, as built drawings, and maintenance schedules to support future inspections.
Smoke Net Maintenance and Inspection
Visual Checks and Cleaning Procedures
Regular inspections screen for damage, soiling, or deformation that could alter flow paths. Cleaning methods must avoid aggressive chemicals that degrade coatings or alter the physical aperture structure of the mesh over time.
Lifecycle Replacement Planning
Service life expectations vary with environment, corrosion protection, and cycling frequency. Establishing replacement intervals in maintenance plans reduces unplanned interventions and supports long term risk management for occupied buildings.
FAQ
Can smoke net be used in heritage buildings with strict aesthetic requirements?
Yes, fine mesh options with minimal visual impact are available, and installations can be concealed within existing coffered ceilings or shaft linings to preserve historic finishes while meeting safety objectives.
How does smoke net perform in high humidity or coastal environments?
Corrosion resistant alloys and coatings are specified to withstand moisture driven deterioration. Designers should verify material compatibility with local humidity levels and potential salt exposure to avoid premature degradation.
Does smoke net require additional fire stopping components at perimeter gaps?
Yes, complementary fire seals, collars, or mineral wool packs are often required to close perimeter gaps and maintain the integrity of the fire separation around penetrations and service openings.
What is the expected maintenance interval for smoke net in typical commercial settings?
Routine visual checks every 6 to 12 months, with detailed inspection and cleaning every 3 to 5 years, depending on occupancy type, dust levels, and exposure to mechanical vibration or contamination.
Operational Guidance and Specification Summary
- Verify fire rating and compliance with the specific local building code.
- Confirm compatibility with shaft dimensions and service penetrations.
- Review pressure drop data at design airflow velocities.
- Align maintenance schedules with insurer or certification requirements.
- Document installation details and as built condition for future audits.
