SCF/Specific/TBT-SCF-015

System Scaffolds (HAKI, Layher)

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System scaffolds use prefabricated modular components that lock together without loose fittings or couplers.
Common systems include HAKI, Layher Allround, Cuplok, and Peri UP, each with proprietary connections.
System scaffolds can only be erected using components from the same manufacturer — mixing systems is prohibited.
Erection must follow the manufacturer's instruction manual and any project-specific design drawings.
Advanced guardrail systems allow edge protection to be installed from the level below, improving safety.
Operatives erecting system scaffolds must hold specific product training certification from the manufacturer.
Foundations, base plates, and sole boards are as critical for system scaffolds as for tube and fitting types.
Load capacity depends on the configuration — the design must match the intended use and loading.
TG20 compliance notes may apply to standard configurations; non-standard layouts require bespoke design.
Inspection and tagging requirements are the same as for all scaffold types under the Work at Height Regulations.

Erection safety	Advance guardrail systems on system scaffolds allow safer erection by providing protection from the level below.
Structural integrity	Mixing components from different systems or deviating from the manufacturer's manual can cause collapse.
Legal requirement	System scaffolds must be erected, used, and dismantled by competent persons in accordance with the Work at Height Regulations.

Don't

Erect system scaffolds strictly following the manufacturer's instruction manual
Ensure all scaffolders hold product-specific training certification for the system used
Use only components from a single manufacturer — never mix different systems
Install advance guardrails from the lower level before boarding the next lift
Check foundations, base plates, and sole boards are adequate before starting erection
Obtain a bespoke design for any non-standard configuration not covered by TG20
Inspect and tag the scaffold every seven days and after adverse weather events
Display the maximum permitted load and any use restrictions on the scaffold tag
Store components on site in an organised manner to prevent damage and mixing
Hand over the completed scaffold formally with documentation to the user

DON'T mix components from different scaffold system manufacturers
DON'T erect system scaffolds without manufacturer-specific training certification
DON'T deviate from the instruction manual or approved design drawings
DON'T force components into position — if they don't fit, something is wrong
DON'T remove advance guardrails or other safety components during erection
DON'T use damaged or deformed system components — reject and return them
DON'T overload the scaffold beyond the capacity stated on the scaffold tag
DON'T allow users to alter the scaffold without a competent scaffolder present
DON'T skip inspections because system scaffolds appear more robust than tube and fitting
DON'T erect on soft ground without adequate sole boards and base plates

See also: Scaffold Safety Awareness | Scaffold Inspection and Tagging

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