Where can good references for specifications on scaffolds and ladders be found?

The WISHA construction safety standard (Washington Industrial Safety and Health Act) provides comprehensive regulations and guidelines specific to workplace safety within the construction industry in Washington State. It addresses the use of scaffolds and ladders by outlining requirements for design, construction, maintenance, and safe use, ensuring that workers are protected from potential hazards associated with these tools.

This option is particularly significant because WISHA standards are enforced on a state level, making them highly relevant and authoritative for construction sites operating in Washington. They are developed to align with federal guidelines while addressing specific local concerns and conditions.

While the other sources may contain relevant information, they do not provide the same level of specificity or legal authority regarding scaffolding and ladders within the context of Washington’s construction safety requirements. The Federal Construction Safety Handbook offers general guidelines that apply across the country, but may lack the localized detail and enforcement context found in WISHA. Manufacturer's guidelines focus primarily on the operation and maintenance of specific equipment, and local union regulations may vary significantly in scope and applicability, making them less reliable as a comprehensive source for safety specifications.