A machine guarding supplier needs more than the approximate length and height of the proposed fence. To recommend and quote a suitable guarding system, they need to understand the machinery, hazards, access requirements, site conditions and intended scope of supply.

Good information at the start reduces design changes, quotation allowances and installation problems. It also helps separate a straightforward perimeter guarding project from one requiring detailed safety engineering, interlocking or integration with the machine control system.

Information a Machine Guarding Supplier Needs

1. Machine and process details

Start with a basic description of the machine and what it does.

Useful information includes:

• Machine type, manufacturer and model
• Products or materials being processed
• Normal operating sequence
• Moving components and hazardous areas
• Existing guards, doors and safety devices
• Whether the machine is new, existing or being modified

Photos and videos are usually more useful than a long written description. Provide wide-angle photos showing the complete machine, then closer images of access points, controls, conveyors, services and potential hazards.

For automated cells, identify all equipment within the proposed guarded area. This may include robots, conveyors, palletisers, presses, turntables or automated guided vehicles.

2. Layout and dimensions

A supplier will normally need a dimensioned layout or enough information to prepare one.

Provide:

• Overall machine dimensions
• Proposed guard perimeter
• Required guard height
• Distance between the guard and hazardous movement
• Floor levels, steps and changes in elevation
• Columns, walls, pits and other obstructions
• Conveyor openings and material transfer points
• Available space around doors and access routes

CAD drawings are ideal, but they are not essential for an initial discussion. Marked-up floor plans, hand sketches and photographs with dimensions can be enough for a budget quotation.

Do not assume a fence can sit immediately beside the hazard. Guard openings, mesh size and separation distances need to be considered together so a person cannot reach through, over or around the guard into a hazardous area.

3. Risk assessment and applicable requirements

Provide the machine risk assessment where one exists. It should identify the hazards being controlled, foreseeable access and the circumstances in which exposure can occur.

In Australia, the AS 4024 series addresses machinery safety topics including risk assessment, guarding, safety-related control systems and presence-sensing systems. ISO 14120 covers general requirements for the design, construction and selection of fixed and movable guards. In the United States OSHA 29 CFR 1910 covers general machine guard safety requirements.

The supplier should also be told about:

• Customer-specific engineering standards
• Internal safety specifications
• Required guarding standard
• Hazardous-area or hygiene requirements
• Food, pharmaceutical or washdown conditions
• Any previous safety audit or regulator findings

A guarding supplier can help develop a physical solution, but should not be expected to reconstruct the entire risk assessment from a few photographs. Hazard identification and risk reduction remain broader plant-safety tasks. Safe Work Australia describes the process as identifying hazards, assessing risks, implementing controls and reviewing those controls.

4. Access and operating requirements

Explain how operators, maintenance personnel and cleaners need to interact with the machine.

Identify:

• Regular operating access
• Loading and unloading points
• Maintenance access
• Tool-change locations
• Cleaning requirements
• Emergency access
• Frequency and duration of entry

This information determines the number, size and position of doors. It also affects the choice between fixed panels, hinged doors, sliding doors and removable sections.

A door placed in the wrong location may be safe on paper but impractical in operation. Staff then find workarounds, which can undermine the guarding system.

5. Interlocks and control-system scope

Tell the supplier which openings need interlocking and who is responsible for the electrical and control-system work.

Important questions include:

• Should opening a door stop hazardous movement?
• Is guard locking required until the hazard has stopped?
• Will personnel enter the guarded space?
• Is trapped-key access being considered?
• Are reset buttons, emergency stops or presence sensing required?
• Who will specify and validate the safety functions?

Interlocking devices should be selected as part of the safety-control design, not simply added as ordinary door switches. ISO 14119:2024 provides principles for the design and selection of interlocking devices associated with guards.

The supplier also needs a clear scope boundary. Confirm whether the quotation covers mechanical guarding only, supply of interlock hardware, electrical installation, programming, validation or a combination of these.

6. Site and installation conditions

For installed projects, provide information about the floor, building and access to the work area.

This includes:

• Concrete thickness and condition
• Underfloor services or post-tensioned slabs
• Site access and induction requirements
• Working hours and shutdown windows
• Forklift or crane availability
• Restrictions on drilling, welding or hot work
• Nearby production that must remain operational

Also identify environmental conditions such as corrosion, outdoor exposure, high temperatures, airborne contaminants or frequent washdown. These may affect the choice of finish, materials, fixings and panel construction.

Common Information Gaps

The most common problem is supplying dimensions without explaining the hazard or operating process. Other issues include missing door requirements, no allowance for conveyor openings, outdated layouts and unclear responsibility for controls integration.

Another mistake is treating the first quotation as a finished safety design. Early pricing will often contain assumptions. These assumptions should be tested through a site measure, design review and risk-assessment process before manufacture.

What Can Be Confirmed Later?

Not every detail is required for an initial budget estimate. A supplier can often begin with photographs, approximate dimensions, a simple layout and a description of the hazards.

Before final design and manufacture, however, the dimensions, access requirements, separation distances, door operation, finishes, fixing conditions and interface with safety controls should all be confirmed.

Conclusion

The information a machine guarding supplier needs is straightforward: what the machine does, where the hazards are, who needs access, how much space is available and what work the supplier is expected to complete.

Providing this information early produces a more accurate quotation and a guarding layout that works with the machine rather than obstructing it. For an initial review, send your layout, photographs, key dimensions and any available risk-assessment documents. A supplier can then identify what still needs to be measured or resolved before the project proceeds.

Frequently Asked Questions

Can a machine guarding supplier quote from photographs?

Photographs may be sufficient for indicative pricing, particularly when supported by approximate dimensions and a floor plan. Final manufacture normally requires verified measurements and an agreed layout.

Do I need a machine risk assessment before requesting a quote?

A completed risk assessment is strongly preferable, especially for complex or modified machinery. A preliminary quotation may still be prepared where the hazards and intended guarding scope are reasonably clear.

What drawings should I provide?

Provide machine layouts, general arrangement drawings, floor plans or CAD files where available. Marked-up PDFs and hand sketches can also work for early-stage pricing.

How accurate do the dimensions need to be?

Approximate dimensions may be acceptable for a budget estimate. Final dimensions should be verified before manufacture, particularly around doors, conveyors, columns and existing equipment.

Does the guarding supplier design the safety control system?

Not necessarily. Some suppliers provide only the physical guarding, while others can supply interlocks, electrical installation and control-system integration. The scope and design responsibility should be stated clearly.

How is the correct guard height determined?

Guard height depends on the hazard location, separation distance, opportunities to reach over the guard, site layout and applicable standards. It should not be selected from height alone.

What information is needed for machine guarding installation?

The installer needs the approved layout, fixing details, floor condition, site access rules, shutdown arrangements and information about concealed services or restrictions on drilling.