Current through Register Vol. 49, No. 13, September 23, 2024
Subpart
1.
Scope.
This part applies to any crane, derrick, or hoist having a
maximum rated capacity of one ton or less; to railway and automobile wrecking
cranes; skip hoists; hoistlike units used for horizontal pulling only; mine
hoists; conveyors and shovels; drag line excavators; backhoes; and any
equipment such as mobile scaffolds, towers, and platforms.
This part also applies to all monorail cranes, underhung
cranes, and top running single girder cranes where the ends of the girders are
fastened or fixed to the structure.
Subp. 2.
Initial inspection.
Before initial use, all new and altered cranes shall be
inspected to ensure compliance with this part.
Subp. 3.
Frequent inspection.
Items A to F shall be inspected for defects at daily to
monthly intervals, or as specifically indicated, including observation during
operation for any defects that might appear between regular inspections. All
deficiencies, such as those listed in items A to F, that constitute a safety
hazard shall be corrected before placing the unit in service.
A. All functional operating mechanisms for
maladjustment interfering with proper operation - daily.
B. Lines, tanks, valves, drain pumps, and
other parts of air or hydraulic systems for deterioration or leakage -
daily.
C. Hooks with deformation or
cracks - visual inspection daily, monthly inspection with signed reports. For
hooks with cracks or having more than 15 percent in excess of normal throat
opening or more than ten degrees twist from the plane of the unbent hook, refer
to subpart
6, item B, subitem
(1).
D. Hoist chains, including end
connections, for excessive wear, twist, distorted links, or stretch beyond
manufacturer's recommendations - visual inspection daily, monthly inspection
with signed certification record.
E. All functional operating mechanisms for
excessive wear of components.
F.
Rope reeving for noncompliance with manufacturer's recommendations.
Subp. 4.
Periodic
inspection.
Complete inspections of the crane shall be performed monthly
or as indicated in subpart
5. These inspections shall
include the requirements of subpart
3 and items A to I. All
deficiencies, such as those listed in items A to I, that constitute a safety
hazard shall be corrected before placing the unit in service:
A. deformed, cracked, or corroded
members;
B. loose bolts or
rivets;
C. cracked or worn sheaves
and drums;
D. worn, cracked, or
distorted parts such as pins, bearings, shafts, gears, rollers, and locking and
clamping devices;
E. excessive wear
on brake system parts, linings, pawls, and ratchets;
F. load, wind, and other indicators over
their full range, for any significant inaccuracies;
G. gasoline, diesel, electric, or other power
plants for improper performance or noncompliance with applicable safety
requirements;
H. excessive wear of
chain drive sprockets and excessive chain stretch; and
I. electrical apparatus, for signs of pitting
or any deterioration of controller contactors, limit switches, and push-button
stations.
Subp. 4a.
Rope inspection.
A. A thorough
inspection of all ropes shall be made at least once a month and a certification
record which includes the date of inspection, the signature of the person who
performed the inspection, and an identifier for the ropes which were inspected
shall be kept on file where readily available to appointed personnel. Any
deterioration, resulting in appreciable loss of original strength, shall be
carefully observed and a determination made as to whether further use of the
rope would constitute a safety hazard. Some of the conditions that could result
in an appreciable loss of strength are the following:
(1) reduction of rope diameter below nominal
diameter due to loss of core support, internal or external corrosion, or wear
of outside wires;
(2) a number of
broken outside wires and the degree of distribution or concentration of such
broken wires;
(3) worn outside
wires;
(4) corroded or broken wires
at end connections;
(5) corroded,
cracked, bent, worn, or improperly applied end connections; or
(6) severe kinking, crushing, cutting, or
unstranding.
B. All rope
which has been idle for a period of a month or more due to shutdown or storage
of a crane on which it is installed shall be given a thorough inspection before
it is used. This inspection shall be for all types of deterioration and shall
be performed by an appointed person whose approval shall be required for
further use of the rope. A certification record shall be available for
inspection which includes the date of inspection, the signature of the person
who performed the inspection, and an identifier for the rope which is
inspected.
Subp. 5.
Cranes not in regular use.
A crane that has been idle for one month or more, but less
than six months, shall be given an inspection conforming with the requirements
of subpart
3 before being placed in
service.
A crane that has been idle for over six months shall be given
a complete inspection conforming with subparts
3 and
4 before being placed in
service.
Standby cranes shall be inspected at least semiannually in
accordance with subpart
3.
Subp. 6.
Adjustments and
repairs.
Any condition disclosed by the inspections required by this
part shall be corrected before operation of the crane is resumed. Adjustments
and repairs shall be done only by designated, qualified personnel.
A. Adjustments shall be maintained to ensure
correct functioning of all components, such as the following:
(1) all functional operating
mechanisms;
(2) limit
switches;
(3) control
systems;
(4) brakes; and
(5) power plants.
B. Repairs or replacements required by this
part shall be provided promptly before resumed operation, including any
deficiencies such as:
(1) crane hooks showing
defects described in subpart
3, item C, shall be
discarded;
(2) load attachment
chains and rope slings showing defects described in subpart
3, items D and E,
respectively;
(3) all critical
parts that are cracked, broken, bent, or excessively worn; and
(4) pendant control stations shall be kept
clean and function labels kept legible.
C. After adjustments and repairs have been
made, the crane shall not be operated until all guards have been reinstalled,
safety devices reactivated, and maintenance equipment removed.
Statutory Authority: MS s
182.655
