This guiding principle provides all the general specification for scaffolds and applies to all maintenance, engineering and construction activities.
This document is based on internationally acceptable standards and specifically drafted for Damen. It sets out the minimum requirements and identifies acceptable work equipment and competence requirements. This guiding principle is therefore not exhaustive and stricter regulations may apply.
Terms and Definitions
- Guardrail: A member incorporated in a structure to prevent the fall of a person from a platform or access way.
- End guardrail: A guardrail placed across the end of a scaffold or used to isolate an un-boarded part.
- Ledger: A longitudinal tube normally fixed parallel to the face of a building in the direction of the larger dimensions of the scaffold. It acts as a support for the putlogs and transoms and frequently for the tie tubes and ledger braces and is usually joined to the adjacent standards.
- Standard: A vertical or near vertical tube.
- Tie or tie assembly: The components attached to an anchorage or the building or framed around a part of it or wedged or screwed into it with a tie tube. Used to secure the scaffold to the structure.
Scaffolding Requests, Surveys and Design Input
To request scaffolding to be erected, altered or dismantled a Scaffold Request Form should be completed, and submitted to the scaffolding manager/contractor, as part of the planning.
The Scaffold Request Form must include details of intended use and any foreseen loading requirements to enable the Scaffolding Manager / Contractor to determine the correct scaffold configuration and obtain the necessary design input, if required. The Requestor should ensure that the weight of any materials or equipment to be loaded on a scaffold is established and where necessary calculated by a Competent Engineer.
BS EN 12811 details the various classifications (or duty) for scaffolding structures.
The maximum loading or duty of a scaffold must be displayed on the scaffold. General access and working scaffolds must display the loading information at each point of access, usually on the scaffold tagging system (see 12.1).
Lifting or rigging equipment should not be fixed to a scaffolding (e.g. chain blocks or cable pullers) unless it has been designed for the purpose or approved by an Engineer.
Never exceed the specified maximum loading of any scaffold or load scaffolding to give rise to the risk of collapse. This includes the storage of scaffolding materials during erection, alteration or dismantling.
Example of Scaffolding request form: