OSHA requirements are set by statute, standards and regulations. Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. This letter constitutes OSHA's interpretation of the requirements discussed. Note that our enforcement guidance may be affected by changes to OSHA rules. Also, from time to time we update our guidance in response to new information. To keep apprised of such developments, you can consult OSHA's website at http://www.osha.gov.
April 30, 2010
Letter # 20081013-8659
Re: Does a truck with a cab containing an intergral falling object protective structure that was
manufactured to meet the ISO 3449 standard conform to 29 CFR 1926.601(b)(6)?
Question: My company uses off-road trucks manufactured in Europe to haul sand and clay soil
materials. The cab of the truck is equipped with a falling object protective structure that was
manufactured to meet IS0 standard 3449. Does the truck comply with 29 CFR 1926.601 (b)(6)?
Section 1926.601(b)(6) provides:
All haulage vehicles, whose pay load is loaded by means of cranes, power shovels, loaders, or
similar equipment shall have a cab shield and/or canopy adequate to protect the operator from shifting or
The ISO (International Organization for Standardization) standard to which you refer, IS0 3449, is designed
to ensure that falling object protective structures on earthmoving machines are sufficiently strong to
protect the operator against falling objects, such as trees, rocks, small concrete blocks and hand tools.
Therefore, as long as the protective structure retains the strength and integrity to meet the IS0 standard,
the equipment would comply with section 1926.601(b)(6) when used for this purpose.
Bill Parsons, Acting Director
Directorate of Construction