Perforated steel airflow floor panel with black opposed-blade damper and pedestals

Cleanroom Flooring Systems

Perforated Steel Raised Access Floor

A removable welded steel ventilation panel with round or slotted openings that delivers controlled airflow from a pressurized raised-floor plenum.

15–38% Free Air Area
Underfloor Air Delivery
Optional Volume-Control Damper
Heavy-Duty Welded Frame

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Product Introduction

Perforated steel raised access flooring introduces supply air through selected modules in a solid access-floor field. Each panel uses a welded tubular steel frame and perforated top plate sized to remain stable under equipment and pedestrian loads. Round or slotted patterns provide several free-area ratios, allowing airflow capacity to be allocated by zone. A removable damper beneath the panel can balance air volume without changing the visible floor grid, and powder coating protects the exposed steel surfaces.

Key Features

Standard round or slotted perforations provide selectable free areas from approximately 15% to 38%.

A welded steel frame carries concentrated loads around the open ventilation field.

An optional underside damper permits local balancing of airflow from the pressurized plenum.

The module fits a conventional 600 mm pedestal grid and can replace a solid panel at required supply positions.

Customer Product Concerns

A raised-floor air system needs predictable open area and balancing control without sacrificing panel stability or service access.

Uniform perforation across the room over-supplies some zones and starves high-load positions.Different hole patterns and free-area ratios allocate airflow where the process or equipment requires it.

Changing fan speed alone cannot balance individual floor outlets.An underside volume-control damper adjusts flow at each selected panel.

Thin perforated sheet flexes around trolley wheels and equipment feet.The perforated face is supported by a welded tubular steel frame designed for concentrated loads.

Dirt enters an inaccessible plenum through permanently fixed grilles.The complete ventilation module lifts from the pedestal grid for cleaning and inspection below.

Typical Applications

Unidirectional-flow cleanroomsSemiconductor fabrication areasData center cold aislesBattery and electronics process roomsTechnical spaces using underfloor air distribution

Technical Parameters

Typical dimensions and material data for a framed perforated steel access-floor panel are listed below.

Core Material	Welded tubular carbon-steel frame supporting a round-hole or slotted perforated steel top plate
Panel Thickness	30–38 mm structural panel depth, excluding optional underside damper
Effective Width	600 mm nominal airflow-panel width
Maximum Length	600 mm nominal modular panel length
Steel Facing Thickness	1.5–2.0 mm perforated steel top plate with reinforced frame sections
Core Density	Approximately 7850 kg/m³ for the welded carbon-steel structure
Thermal Conductivity	Approximately 45–60 W/(m·K) for the carbon-steel panel structure
Surface Finish	Durable powder-coated steel with 15–38% standard free-area perforation patterns
Joint Type	Removable framed panel seated on gasketed pedestals or stringers with optional underside airflow damper
Customization	Available based on the intended application and operating environment.

Available Options

Round-hole or slotted perforation patternApproximately 15%, 23%, 24% or 38% free air areaManual or actuator-ready airflow damperConductive coating and reinforced heavy-load frame

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