Raised Access Floor RAMS: Risk Assessments for RAF Installation in Commercial Fit-Out

Table of Contents

• Why Raised Access Floor RAMS Matter
• Hazard Identification for RAF Installation
• Floor Void Controls and Working Practices
• Overloading and Structural Risk
• CDM 2015 Obligations for RAF Contractors
• What Your Raised Access Floor RAMS Must Cover
• Frequently Asked Questions
• Next Steps

Why Raised Access Floor RAMS Matter

Raised access floor (RAF) installation is a fundamental element of commercial office and data centre fit-out projects. Despite its apparently straightforward nature — laying pedestals, stringers, and panels — RAF work carries a distinct set of hazards that principal contractors and principal designers look for in every RAMS submission.

Under CDM 2015, RAF contractors are duty holders. Before any installation begins, a risk assessment and method statement must be produced, reviewed by the principal contractor, and communicated to all operatives through a pre-start briefing. A poorly structured RAMS for raised access floor work is one of the most common reasons for rejected documentation on commercial fit-out projects.

This guide explains what your RAF RAMS must include, the specific hazards unique to this trade, and how to structure your documentation to meet the requirements of principal contractors on live commercial projects.

Browse all trade RAMS templates on the RAMS AI trade hub — covering 22 specialist construction trades.

Hazard Identification for RAF Installation

Your risk assessment must identify all significant hazards present during installation. For raised access floor work, these typically include:

• Manual handling of panels and pedestals — RAF panels range from lightweight calcium sulphate tiles to heavy-duty steel-encased panels used in data centres. Manual handling risk assessments must identify panel weight, carrying distances, repetitive lifting frequency, and any mechanical handling aids (trolleys, suction lifters) that will be used.
• Falls into open floor voids — The most serious hazard during RAF installation is the open void left when panels are removed or not yet installed. Operatives walking across partially completed floors can fall into voids, particularly in low-light conditions. Your method statement must specify how open voids will be guarded, marked, or covered at all times.
• Electrostatic discharge (ESD) — In data centre and server room environments, unsuppressed static electricity can damage equipment worth hundreds of thousands of pounds. ESD-compliant footwear, grounding wrist straps, and anti-static floor panels must be specified in your RAMS for these environments.
• Pedestal installation and base plate fixings — Drilling into structural concrete slabs for pedestal base plates creates dust and noise hazards. COSHH controls for concrete dust (respirable crystalline silica) and hearing protection must be included.
• Working adjacent to existing services — RAF installation frequently occurs in occupied or part-occupied buildings where electrical cables, data trunking, and water services run beneath or adjacent to the floor void. Permit-to-work systems and service drawings must be referenced in your RAMS.

Floor Void Controls and Working Practices

The floor void created during RAF installation is the primary serious injury risk. Your method statement must specify:

• How panels will be removed and reinstated when accessing voids for under-floor services
• The maximum extent of open void permitted at any one time
• How open voids will be protected — barriers, covers, or the "one panel at a time" rule
• Lighting requirements in the void for maintenance access
• The prohibition on working alone in or adjacent to open voids
• How the work area will be signed and segregated from other trades on site

For data centres and server rooms, your RAMS should also specify temperature and humidity conditions that affect safe working, together with any restrictions on wet cutting or processes that generate moisture or particulate.

Overloading and Structural Risk

Every raised access floor system has a specified uniformly distributed load (UDL) and concentrated load rating. Your RAMS must state the specified load rating for the system being installed and identify any risks of temporary overloading during installation — particularly where materials are stacked on completed sections of floor before all pedestals are fully grouted or adjusted.

On fit-out projects, RAF contractors are frequently required to coordinate with other trades (IT infrastructure, mechanical and electrical, furniture contractors) whose equipment will rest on the finished floor. Your method statement should identify the process for confirming installed load ratings and the controls for preventing overloading during subsequent fit-out phases.

For data centre environments, your RAMS must also address seismic loading provisions where specified, and the requirements for floor systems in areas subject to raised floor cooling airflow.

CDM 2015 Obligations for RAF Contractors

Under CDM 2015, RAF contractors operating as contractors (rather than the principal contractor) must:

• Produce a RAMS that is specific to the project — not a generic document
• Submit the RAMS to the principal contractor before work begins and wait for written approval
• Brief all operatives on the content of the RAMS through a pre-start briefing, recording attendance
• Cooperate with the principal contractor's site induction and emergency procedures
• Report any changes to the method that arise during installation and obtain revised approval

For larger fit-out projects, a fit-out RAMS covering the full scope of works may be required in addition to trade-specific documents for RAF, partitioning, and mechanical and electrical services.

What Your Raised Access Floor RAMS Must Cover

• Scope of works: floor system type, area, pedestal height range, panel specification
• Hazard register with risk ratings (likelihood × severity) before and after controls
• Manual handling assessment for panel weights and carrying routes
• Floor void control measures and open void management rules
• ESD controls for data centre and server room environments
• COSHH assessment for concrete dust from pedestal base plate drilling
• Noise assessment and hearing protection for any drilling or cutting operations
• Coordination with other trades, especially M&E services in the void
• Emergency procedures and nearest first aid point
• Operative training and competence records for the system being installed
• Waste management for packaging and offcuts

Frequently Asked Questions

Do I need a separate RAMS for every room or floor on a large project?

Not necessarily. A single RAMS document is usually sufficient for a project where the floor system and hazard profile are consistent throughout. However, if specific areas present substantially different risks — such as a server room requiring ESD controls compared to standard office areas — the RAMS should either include dedicated sections for those areas or be supplemented by a method statement appendix covering the specific conditions.

What load information should I include in my RAMS?

Include the manufacturer's specified UDL (in kN/m²) and concentrated load rating for the floor system, the design loads confirmed by the structural engineer or fit-out contractor, any temporary loading from stacked materials during installation, and confirmation that the structural floor slab itself has been verified as suitable to receive the pedestal base plates at the specified pedestal centres.

Who is responsible for the floor void during installation — RAF contractor or principal contractor?

Both parties have responsibilities. The RAF contractor is responsible for the controls specified in their RAMS while they are working. However, the principal contractor must ensure the site is safe for all workers and visitors, including ensuring open voids created by the RAF contractor are adequately protected when that trade is not present on that section of floor. This coordination should be addressed explicitly in both the RAMS and the principal contractor's Construction Phase Plan.

Next Steps

Your raised access floor RAMS is a live document — it must be reviewed and updated whenever the installation method changes or a new hazard is identified. For complex data centre projects, consider commissioning a dedicated raised access floor RAMS that addresses ESD controls, temperature constraints, and load management in detail.

RAMS AI can generate a project-specific raised access floor risk assessment and method statement in minutes, pre-populated with the trade-specific hazards and controls described in this guide.