When the requirement of the scaffolding height to base ratio is not satisfied, stabilisers are required.

Stabilisers are used to increase the frame width of the base. The image illustrates an 8m scaffold tower with a working platform area of 2m x 1.4m.

This tower has stabilisers composed of diagonal or scaffolding cross braces, ledgers, base collars and castors or caster wheels. This helps reduce the height to base ratio to 4:1 or even less.

The ratio must be equal or less than 4:1, which means that the minimum required bay length for the structure stability should be equal or higher than 2m (8/4) each side. Therefore, the current depth of the tower must be increased from 1.4 m to 2m.