APPENDIX D: OSHA STANDARD 29 CFR 1910.177 (SERVICING
MULTI-PIECE AND SINGLE PIECE WHEELS)
§1910.177 Servicing multi-piece and single piece rim
(a) Scope. (1) This section applies to the servicing of multi-
piece and single piece rim wheels used on large vehicles such
as trucks, tractors, trailers, buses and off-road machines. It
does not apply to the servicing of rim wheels used on
automobiles, or on pickup trucks and vans utilizing
automobile tires or truck tires designated "LT."
(2) This section does not apply to employers and places of
employment regulated under the Construction Safety
Standards, 29 CFR Part 1926; the Agriculture Standards, 29
CFR Part 1928; the Shipyard Standards, 29 CRF part 1915; or
the Longshoring Standards, 29 CRF part 1918.
(3) All provisions of this section apply to the servicing of
both single piece rim wheels and multi-piece rim wheels
unless designated otherwise.
(b) Definitions. Barrier means a fence, wall or other struc-
ture or object placed between a single piece rim wheel and an
employee during tire inflation, to contain the rim wheel
components in the event of the sudden release of the contained
air of the single piece rim wheel.
Charts means the U.S. Department of Labor, Occupational
Safety and Health Administration publications entitled
"Demounting and Mounting Procedures for Truck/Bus Tires"
and "Multi-piece Rim Matching Chart," the National Highway
Traffic Safety Administration (NHTSA) publications entitled
"Demounting and Mounting Procedures Truck/Bus Tires" and
"Multi-piece Rim Matching Chart," or any other poster which
contains at least the same instructions, safety precautions and
other information contained in the charts that is applicable to
the types of wheels being serviced.
Installing a rim wheel means the transfer and attachment of an
assembled rim wheel onto a vehicle axle hub. Removing
means the opposite of installing.
Mounting a tire means the assembly or putting together of the
wheel and tire components to form a rim wheel, including
inflation. Demounting means the opposite of mounting.
Multi-piece rim wheel means the assemblage of a multi-piece
wheel with the tire tube and other components.
Multi-piece wheel means a vehicle wheel consisting of two or
more parts, one of which is a side or locking ring designed to
hold the tire on the wheel by interlocking components when
the- tire is inflated.
Restraining device means an apparatus such as a cage,
rack, assemblage of bars and other components that will con-
strain all rim wheel components during an explosive
separation of a multi-piece rim wheel, or during the sudden
release of the contained air of a single piece rim wheel.
Rim manual means a publication containing instructions from
the manufacturer or other qualified organization for correct
mounting, demounting, maintenance, and safety precautions
peculiar to the type of wheel being serviced.
Rim wheel means an assemblage of tire, tube and liner (where
appropriate), and wheel components.
Service or servicing means the mounting and demounting of
rim wheels, and related activities such as inflating, deflating,
installing, removing, and handling.
Service area means that part of an employer's premises
used for the servicing of rim wheels, or any other place
where an employee services rim wheels.
Single piece rim wheel means the assemblage of single
piece rim wheel with the tire and other components.
Single piece wheel means a vehicle wheel consisting of
one part, designed to hold the tire on the wheel when the
tire is inflated.
Trajectory means any potential path or route that a rim
wheel component may travel during an explosive
separation, or the sudden release of the pressurized air, or
an area at which an airblast from a single piece rim
wheel may be released. The trajectory may deviate from
paths which are perpendicular to the assembled position
of the rim wheel at the time of separa- tion or explosion.
(See Appendix A of this manual for examples of
Wheel means that portion of a rim wheel which provides
the method of attachment of the assembly to the axle of a
vehicle and also provides the means to contain the
inflated portion of the assembly (i.e., the tire and/or
(c) Employee training. (1) The employer shall provide a
gram to train all employees who service rim wheels in
the haz- ards involved in servicing those rim wheels and
the safety pro- cedures to be followed.
(i) The employer shall assure that no employee services
any rim wheel unless the employee has been trained and
instructed in correct procedures of servicing the type of
wheel being serviced, and in the safe operating
procedures described in paragraphs (f) and (g) of this
(ii) Information to be used in the training program shall
include, at a minimum, the applicable data contained in
the charts (rim manuals) and the contents of this
(iii) Where an employer knows or has reason to believe
that any of his employees is unable to read and
understand the charts or rim manual, the employer shall
assure that the employee is instructed concerning the
contents of the charts and rim manual in a manner which
the employee is able to understand.
(2) The employer shall assure that each employee
demon- strates and maintains the ability to service rim
wheels safely, including performance of the following
(i) Demounting of tires (including deflation);
(ii) Inspection and identification of the rim wheel
(iii) Mounting of tires (including inflation with a
restraining device or other safeguard required by this
(iv) Use of the restraining device or barrier, and other
equip- ment required by this section;
(v) Handling of rim wheels;