Scaffolding is used to create safe access to buildings and areas of height. A basic scaffold usually comprises three elements.
A standard is a long pipe or tube that directly connects the load of the scaffold to the ground. And will run the entire length of the scaffolding. The base of each standard is then connected to a base plate which aids in the distribution of the load from the standards. You will find in between each standard running horizontally is a ledger which provides further support and even weight distribution. Transoms are placed on top of ledgers at a right angle and come in several different forms.
Main transoms provide support for standards by holding them in position as well as supporting boards. Intermediate transoms are placed alongside main transoms to lend additional board support.
In addition to standards, ledgers, and transoms, there are several other supportive elements that serve to reinforce the fundamental scaffolding. Braces, such as Cross braces, façade braces, and additional couplers, can be used in varying combinations to support the structure in several ways. Cross braces run diagonally between ledgers and securely attach to standards to increase a structure’s overall rigidity. However, the can also secure themselves to ledgers, in which case they are simply called ledger braces. Façade braces help prevent a structure from swaying and are attached on the face of the scaffold, running the length of the face of the structure and securely attaching at every level.
In addition to the basic structural elements of a scaffold, there are multiple kinds of ties that secure a scaffold to the adjoining building. As a general rule, ties are attached every 4 meters on alternating lift levels. However, depending on the kind of scaffold, the tie patterns and types of ties used can vary. Through ties, for example, can be used to secure a scaffold to a building by entering a building’s open window. Boxties help secure a scaffold by attaching to a building’s external features, such as strong pillars.
Couplers help connect structural elements and come in several variants. To connect a ledger or transom to a standard, a right-angle coupler should be used. If a transom supports a board and must be connected to a ledger, a putlog or single-coupler should be used to connect the ledger to the transom. For any other angle of connection between scaffold piping, a swivel coupler is recommended.
The length, width, and height of each scaffold element can vary with each building, but there are several basic measurements for each basic component. General width of a scaffold is typically determined by the width of the scaffolding boards. The height between ledgers also called lift height, is usually between 2 and 2.7 meters. Transom placement depends on board thickness. If the board is 38 mm thick, transoms should be 1.2 meters apart, at the most. A 50 mm thick board requires that transoms be no more than 2.6 meters apart.
ADS Preferred Scaffolding
After working with numerous different types of system scaffold over the years, Haki, Cuplock, Quickstage and Layher, Our preferred system of choice here at ADS Scaffolding is Plettac Metrix.
Plettac Metrix is a revolutionary ring system, exclusively supplied by TRAD Hire and Sales.
When providing a service to our clients, we believe in offering the best products delivered to them in the safest way that we can, to satisfy every aspect of their project and requirements.
Using Plettac Metrix has many advantages over conventional tube and fitting, it is a fully NASC compliant and CISRS approved system and it exceeds all necessary British and European standards.
Using system scaffolding has many benefits; The ability to construct without the need of ledger braces constructed through working platforms is a huge advantage, offering clients a better working environment and creating more space for working on our access platforms.
The Perforated Steel Decks allows for more light through the structure, meaning better working conditions. When working on live residential sites, this also means reduced disruption to tenants by increasing light through their windows.
The system also has many advantages over other ring based systems and, as the name suggests, is completely metric. With bay lengths and breadths being divisible by one another, along with the system being completely tubular, Plettac Metrix is a highly adaptable modular system.
In addition, there is an exclusive optional Permanent Advanced Guardrail system which allows the scaffolders to work safely from the platform below while complying fully with the NASC’s guidance note SG4.
All of these unique features of the system lead to significant benefits including; project cost savings, greater efficiency when erecting and dismantling and improved safety.