What is the minimum square size and thickness of a square jack?

The minimum square size and thickness of a square jack used in scaffolding applications are crucial for ensuring stability and safety during construction. A square jack is a vital component designed to take vertical loads and maintain the scaffolding's structural integrity.

The correct choice indicates that a square jack should measure 150mm x 150mm with a thickness of 6mm. This size is often specified in industry standards because it provides an adequate load-bearing capacity while remaining manageable for installation and adjustments on the job site. The dimensions ensure that the jack can handle the stresses it may encounter without failure, offering sufficient support for scaffolding structures in various scenarios.

Larger or thicker jacks may provide additional strength, but they can also increase the weight of the scaffolding system and may not always be necessary for standard applications. The selected thickness balances structural requirements and the weight implications, making it functional and practical for routine scaffolding work.

Understanding these specifications helps ensure compliance with safety regulations and best practices within the scaffolding industry.