In Canada, what is the maximum horizontal spacing permissible between ties?

The correct answer indicates that the maximum horizontal spacing permissible between ties in Canada is 20 feet. This specification is based on safety standards and engineering practices that ensure the stability and integrity of scaffolding structures. Maintaining this spacing is crucial in order to adequately support the scaffold's load and provide the necessary safety for workers at height.

Spacing ties too far apart could lead to a higher risk of tip-over or failure of the scaffolding structure, especially under dynamic loads such as wind or when workers are moving about. The 20-foot maximum allows for better stability and safety, complying with regulations set forth in national building codes and industry best practices that are designed to minimize accidents and falls in construction environments.

This measure is an essential aspect of scaffolding erection and maintenance that must be adhered to in order to promote safety on job sites. Understanding these limits is vital for those working in the construction industry, as it contributes directly to the effective use of scaffolding systems and the overall safety of the work environment.