Every open-sided floor or platform that rises four feet or more above the adjacent floor must be protected on all open sides by a standard railing. If there is moving equipment below, the standard railing must include a .

toeboard

Explanation: The Occupational Safety and Health Administration defines the Walking-Working surfaces regulation for the secure construction of stairs in industrial environments. For platforms or walls that are 4 feet or higher above the ground and do not have surrounding walls, it is mandatory to build a standard railing around them. In cases where there is a moving machinery, people can pass or there is an equipment which would be harmful when falling objects come in contact with it, the railings must have a toeboard.

A toeboard is an equipment fixed vertically to prevent items from falling for the platform.

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