Final answer:
The maximum allowed distance between a toeboard and the walking/working surface is 4 inches, which is a standard occupational safety measure.
Step-by-step explanation:
The maximum distance between a toeboard and the walking/working surface is 4 inches. This is a safety measure used to prevent tools or materials from falling and causing injury to people below the walking/working surface. In occupational safety, especially in construction and industrial environments, maintaining proper distance between a toeboard and the walking surface is crucial for ensuring the safety of workers.