Independent Tied Scaffolds
Scaffolding is made up of the following basic components:
Standards – uprights or vertical tubes used to support the load to the ground.
Ledgers – horizontal tubes tying the structure together longitudinally, usually running parallel to the face of the building.
Transoms – short horizontal tubes spanning across ledgers normally at right angles (90°) to the face of the building. They may also be used to support a working platform.
Bracing – diagonal tubes that give the structure its rigidity.
Base plates – small square metal plates that the standards (uprights) rest on to prevent them sinking into the ground.
Sole boards – large pieces of timber put under the base plates to spread the load over a wide surface area when the scaffold is erected on soft ground.
Work platform – fully boarded.
Guardrails – fixed to the standards (uprights) to fully enclose the work platform.
Toeboards – fixed to the standards (uprights) to provide a lip for the platform.
An independent tied scaffold is designed to carry its own weight and the full load of all materials and workers on the
platform. It must be tied to the building where it is sited, to give stability and prevent movement.
As the total weight of the structure is supported by the ground it is very important that the ground conditions are
suitable to cope with the load. Base plates and sole boards may be used to spread the weight over a large surface area.