Installing a cantilever scaffold loading bay requires strict attention to detail to ensure safety, compliance, and structural integrity under heavy loads. By adding a cantilever Loading to an existing access scaffold, will increase significantly the leg load to ground.

Follow this step-by-step guide to correctly assess and install a cantilever loading bay, avoid common errors, and ensure a safe build from the ground up.

The stability of any scaffold structure begins at ground level. Because loading bays are subjected to exceptionally high loads, standard base setups are often insufficient.

• Foundation: A pyramidal sole board arrangement is highly recommended to properly distribute the massive weight and high loads transferred through the standards. Alternatively, Double standards with increased spreading are added.
• Bay Dimensions: For optimal structural integrity, keep your bay sizes compact. Inspect the design and follow the bay sizes shown depending on the loading.

Once your foundation is set and the kicker lift is complete, bracing is required to prevent any lateral movement or twisting.

• Ledger Bracing: Ledger braces must be installed in every single bay under the cantilever beams without exception.
• Sway / Facade Bracing: Sway braces (or facade braces) should also be installed all the way to the cantilever Loading Bay.

A frequent error that causes cantilever scaffold loading bays to fail by toppling over is when the scaffold ties are missing. It is very important tat ties to be installed into the wall or slab at the back if the cantilever Loading Bay.

• Check the Ties: Sometimes Shear ties are required.

See also Progressive Loading Bay

As the main scaffold is strengthened you can progress to beams installation.

• Beam selection shall follow the approved scaffold design and calculations. Depending on cantilever length, live loading and structural arrangement, ladder beams, 450 mm aluminium beams or 750 mm aluminium beams may be specified. Beam substitution should never be carried out without engineering approval.

• Lacing spacing depends on beam spacing, loading and structural arrangement. Whilst approximately 600 mm centres may suit many applications, the spacing shown on the design drawing shall always be followed. Lacing should be connected using double couplers or Band and Plate connectors where specified.

• Beam restraint is critical to control lateral torsional buckling and excessive movement. Restraints are commonly installed at 1 m or 2 m centres. Plan braces may connect to beam chords using swivel or double couplers. Section braces may be fixed with double couplers or swivel couplers where Band and Plates are used.

• Spur standards may be installed from the ledger on the lift below to the underside of the cantilevered beams. They provide an additional load path, helping redistribute vertical reactions, reduce peak reactions in the front standards and improve the structural behaviour of the supporting scaffold. Their number and location shall follow the approved design.

• Supplementary couplers increase joint capacity and improve resistance to ledger slip where significant reactions are transferred into the scaffold.
• Double standards are only required where dictated by the design, depending on scaffold height, loading bay position and resultant vertical reactions.

F. Double Standards

• Double standards are only required where dictated by the design, depending on scaffold height, loading bay position and resultant vertical reactions.

Other aspects:

• Cantilever beams should be supported by both outside and inside standards. Where existing bays are too wide, additional standards may be required.
• The engineer should verify that the self-weight of the supporting scaffold is sufficient to resist uplift. Where required, inside standards may need splicing or other measures identified by structural calculations.

Please note: This is a training/illustration example.