Call your closest OSHA area office or go to the OSHA web site (see related link, below).
General industry standard
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According to OSHA's website, "OSHA uses the term "general industry" to refer to all industries not included in agriculture, construction or maritime. General industries are regulated by OSHA's general industry standards, directives, and standard interpretations." Try OSHA.gov for a more thorough answer.
I think you are asking about the OSHA general Industry standard on walking and working surfaces. That is covered in Subpart D of the 1910 standards.
(OSHA) The Occupational Safety and Health Administration
No. 29 CFR Part 1926 contains the OSHA Construction Industry Standards. The General Industry Standards are in 29 CFR 1910.
The OSHA General Industry Confined space standard (29 CFR 1910.146) pertains strictly to confined spaces.
OSHA does not have a specific standard for the spacing of balusters.
The OSHA General Industry Standard requires fall protection be provided if the potential fall is 6 feet or greater.
There is no Part 1972.353 in the OSHA regulations.
There are no OSHA standards specifically for aerospace engineering. The OSHA General Industry standards would usually apply, although some activities may come under the Construction Industry Standards..
An OSHA standard is a regulation issued by OSHA, after proper notice and comment, that sets a minimum requirement in some area of practice or activity over which OSHA has authority. Such a standard establishes a minimum level of safety in the workplace acceptable to society at large.