DEPARTMENT OF LICENSING AND REGULATORY AFFAIRS  
DIRECTOR'S OFFICE  
GENERAL INDUSTRY SAFETY STANDARDS  
(By authority conferred on the general industry safety standards commission by sections  
16 and 21 of Act No. 154 of the Public Acts of 1974, as amended, being SS408.1016 and  
408.1021 of the Michigan Compiled Laws)  
PART 19. CRAWLER, LOCOMOTIVE, AND TRUCK CRANES  
R 408.11901 Scope.  
Rule 1901. This part provides for the safe construction and maintenance of crawler,  
locomotive, and truck cranes, including mobile hydraulic cranes, used only as lifting  
cranes, by the employer and their safe use by the employee in, around, and about a place  
of employment. Railway cranes on public right-of-ways for clearing wrecks are excluded.  
History: 1979 AC.  
R 408.11902 Adoption of standards by reference.  
Rule 1902. (1) The following standards are adopted by reference in these rules and are  
available from IHS Global, 15 Inverness Way East, Englewood, Colorado, 80112, USA,  
telephone number: 1-800-854-7179 or via the internet at website: http://global.ihs.com; at  
a cost as of the time of adoption of these rules, as stated in this subrule.  
(a) American Society of Mechanical Engineers (ASME) Standard ASME B30.5  
“Crawler, Locomotive and Truck Cranes,” 1968 edition. Cost: $60.00.  
(b) American National Standard Institute (ANSI) Standard, ANSI B30.15 “Mobile  
Hydraulic Cranes,” 1973 edition. Cost $60.00.  
(2) The standards adopted in subrule (1) of this rule are also available for inspection at  
the Department of Licensing and Regulatory Affairs, MIOSHA Standards Section, 7150  
Harris Drive, P.O. Box 30643, Lansing, Michigan, 48909-8143.  
(3) Copies of the standards adopted in subrule (1) of this rule may be obtained from the  
publisher or may also be obtained from the Department of Licensing and Regulatory  
Affairs, MIOSHA Standards Section, 7150 Harris Drive, P.O. Box 30643, Lansing,  
Michigan, 48909-8143, at the cost charged in this rule, plus $20.00 for shipping and  
handling.  
(4) The Michigan occupational safety and health standard Construction Safety Standard  
Part 10 “Lifting and Digging Equipment,’ R 408.41001a to R 408.41075a, is referenced  
in these rules. Up to 5 copies of these standards may be obtained at no charge from the  
Michigan Department of licensing and regulatory affairs, MIOSHA standards section,  
7150 Harris Drive, P.O. Box 30643, Lansing, MI, 48909-8143 or via the internet at  
Page 1  
website: www.michigan.gov/mioshastandards. For quantities greater than 5, the cost, at  
the time of adoption of these rules, is 4 cents per page.  
History: 2013 AACS.  
R 408.11903 Definitions; B, C.  
Rule 1903. (1) "Boom" means a structural member hinged at the lower end to a fixed  
location and used for supporting hoisting tackle.  
(2) "Boom angle" means the acute angle between the longitudinal center line of the boom  
and the horizontal.  
(3) "Boom stop" means a device used to limit the angle of the boom at the highest position.  
(4) "Crawler crane" means a rotating superstructure with a power plant, operating  
machinery, and boom mounted on a base equipped with crawler treads for travel, and used  
for hoisting and swinging loads.  
History: 1979 AC.  
R 408.11904 Definitions; J to R.  
Rule 1904. (1) "Jib" means an extension attached to a boom point to provide added boom  
length for lifting a specific load. A jib may be in line with the boom or offset to various  
angles.  
(2) "Load rating" means the rating in pounds established by the manufacturer in  
conjunction with R 408.11923 and is dependent on such factors as anchorage, structural  
competence, rope strength, and hoist capacity.  
(3) "Locomotive crane" means a rotating superstructure with a power plant, operating  
machinery, and boom mounted on a base or car equipped for travel on a railroad track. It  
may be self-propelled or propelled by an outside source.  
(4) "Mobile hydraulic crane" means a crane using a hydraulic means of powering some  
of the basic crane functions.  
(5) "Reeving" means a rope system in which the rope travels around drums and sheaves.  
History: 1979 AC.  
R 408.11905 Definitions; S.  
Rule 1905. (1) "Safety factor" means the ratio of the breaking strength of a piece of  
material or object to the maximum designed load or stress applied when in use.  
(2) "Side loading" means a load applied at an angle to the vertical plane of the boom.  
(3) "Standby" means not to be in regular service, but used intermittently or occasionally  
as required.  
(4) "Standing rope" means a supporting rope which maintains a constant distance between  
points of attachment to the 2 components connected by the rope.  
(5) "Structural competence" means the ability of a machine and its components to  
withstand the stresses imposed by applied loads.  
(6) "Swing" means the rotation of a mast or boom for movement of loads in a horizontal  
direction about the axis of rotation.  
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History: 1979 AC.  
R 408.11906 Definitions; T to W.  
Rule 1906. (1) "Truck crane" means a rotating superstructure with a power plant,  
operating machinery, and boom mounted on an automotive truck equipped with a power  
plant for travel.  
(2) "Whipline" means a separate or auxiliary hoist rope system of lighter load capacity  
and higher speed than provided by the main hoist.  
(3) "Winch head" means a power driven spool for handling of a load by means of friction  
between fiber or wire rope and the spool.  
History: 1979 AC.  
R 408.11911 Employer responsibilities.  
Rule 1911. (1) An employer shall limit the use of a crawler, locomotive, or truck crane  
to:  
(a) An employee who has been trained and qualified to operate the type crane to which  
he is assigned.  
(b) A learner under the direct supervision of a designated employee.  
(c) Authorized maintenance personnel during the performance of their duties.  
(2) An employer shall maintain a crane and its accessories in a condition which will not  
endanger an operator or other employees.  
(3) An employer shall limit the use of a crane to its maximum rated capacity.  
History: 1979 AC.  
R 408.11912 Employee responsibilities.  
Rule 1912. (1) An employee, except a learner, shall pass a qualification test including  
items in R 408.11915 before operating a crane.  
(2) An operator shall report any defects of a crane to his supervisor.  
(3) An unauthorized employee shall not enter a crane cab.  
(4) An unauthorized employee shall not ride on any exterior part of a crane.  
History: 1979 AC.  
R 408.11913 Operator selection.  
Rule 1913. (1) An employer shall be able to demonstrate that an employee is trained and  
qualified to operate the equipment prior to authorizing the employee to operate the  
equipment. A permit system may be used to comply with this rule.  
(2) An employee assigned to operate a crawler, locomotive, or truck crane shall have his  
or her ability to meet the minimum requirements in this rule verified not less than every 3  
years.  
Page 3  
History: 1979 AC; 1991 AACS; 2013 AACS.  
R 408.11914 Operator training.  
Rule 1914. An employer shall provide training to a prospective crane operator prior to  
assignment as an operator of a crane. Instruction shall include:  
(a) Capabilities of the equipment and attachments.  
(b) Purpose, use, and limitations of the controls.  
(c) How to make daily inspections of the equipment.  
(d) Practice in operating assigned equipment through the functions necessary to perform  
the job.  
(e) A review of state standards, company rules, and regulations applicable to crane  
operation.  
History: 1979 AC.  
R 408.11915 Operator testing.  
Rule 1915. An employer shall determine the ability of an employee before authorizing  
the employee to operate a crane. This determination shall be based on the employee's:  
(a) Operating ability.  
(b) Knowledge of the equipment.  
(c) Knowledge of state standards, company rules, and regulations applicable to crane  
operation.  
(d) Knowledge of daily inspections of the equipment.  
History: 1979 AC.  
R 408.11916 Rescinded.  
History: 1979 AC; 1983 AACS; 1997 AACS.  
CONSTRUCTION  
R 408.11921 Construction; standards.  
Rule 1921. (1) A crawler, locomotive or truck crane, purchased or modified after  
December 28, 1974, shall be as prescribed in Chapter 501 and Section 5-2.2 of Chapter 5-  
2, ASME B30.5 “Crawler, Locomotive and Truck Cranes,” 1968 edition, as adopted in R  
408.11902.  
(2) A mobile hydraulic crane purchased or modified after December 28, 1974, shall be as  
prescribed in Chapter 15-1 and Section 15-2.2 of Chapter 15-2, ANSI B30.15 “Mobile  
Hydraulic Cranes,” 1973 edition, as adopted in R 408.11902.  
Page 4  
(3) A crawler, locomotive, or truck crane purchased after August 31, 1971, shall be  
modified to conform to Chapter 5 and Section 5-2.2 of Chapter 5-2 of ASME B30.5  
“Crawler, Locomotive, and Truck Cranes” 1968 edition or Chapter 15-1 and Section 15-  
2.2 of Chapter 15-2 of ANSI B30.15 “Mobile Hydraulic Cranes,” 1973 edition, as adopted  
in R 408.11902.  
History: 1979 AC; 2013 AACS.  
R 408.11923 Rating charts.  
Rule 1923. (1) A legible rating chart shall be provided at the operator station showing not  
less than the following information for crawler, locomotive, or truck cranes:  
(a) Load capacity relating to corresponding boom angles and operating radii for all boom  
lengths, jib lengths, and angles. Where optional equipment, such as outriggers or extra  
counterweights, is provided by the manufacturer, alternate ratings shall be provided in  
addition.  
(b) Where structural competence limits the ratings, such information shall be shown on  
the chart.  
(2) The required parts of line for hoist reeving, including the size and construction of rope,  
shall be on the rating chart or in the operating manual.  
History: 1979 AC.  
R 408.11924 Ballast and counterweight.  
Rule 1924. A crane shall not be operated with more than the designed amount of ballast  
or counterweight. The amount of ballast or counterweight shall not be changed without  
authorization of the manufacturer in writing and making corresponding changes in the  
rating chart prescribed in R 408.11923.  
History: 1979 AC.  
OPERATION  
R 408.11931 Operating practices; general.  
Rule 1931. (1) An operator shall respond to signals only from the designated signalman  
using appropriate signals, except where voice communications equipment is used (See  
figure 1). An operator shall obey a stop signal from anyone.  
(2) A crane shall be equipped with an audible signaling device which shall be actuated  
before traveling and intermittently during travel when approaching an employee. When  
moving a crane, the following signals shall be used:  
(a) Stop, 1 audible signal.  
(b) Go ahead, 2 audible signals.  
(c) Back up, 3 audible signals.  
Page 5  
(3) An operator is responsible for those operations under his control. Whenever there is  
doubt as to safety, he shall stop operations until safety is assured.  
(4) An operator shall not close a switch or start an engine if there is a warning sign or tag  
on the starting controls until the sign or tag has been removed by the employee placing it  
or removed by an authorized employee after making sure the hazard is removed. Before  
closing a switch or starting an engine, an operator shall see that all controls are in the off  
position and all employees are in the clear.  
(5) If power fails during operation, the operator shall:  
(a) Set all brakes and locking devices.  
(b) Move all clutches and other power controls to the off or neutral position, unless such  
action would create an unsafe condition.  
(c) If practicable, land any suspended load under brake control.  
(6) An operator shall test all controls at the start of a shift. Needed adjustments shall be  
made before operations begin.  
Figure for 408.11931 (1 of 3)  
Page 6  
Figure for 408.11931 (2 of 3)  
Page 7  
Figure for 408.11931 (3 of 3)  
History: 1979 AC.  
R 408.11932 Operating practices.  
Rule 1932. (1) An operator shall not leave a crawler, locomotive, or truck crane  
unattended until:  
(a) Any attached load, bucket, lifting magnet, or other device is landed.  
(b) The master clutch is disengaged.  
(c) The travel, swing and boom brakes and other locking devices are set.  
(d) The clutch controls are in the off or neutral position unless such action would create  
an unsafe condition.  
(e) The engine is stopped.  
(f) The crane is secured against accidental travel.  
(2) When assembling or disassembling a boom on the ground, it shall be blocked to  
prevent dropping the boom and boom sections.  
(3) When a boom section is manually telescoped it shall be positioned so that through and  
through pinning of the cylinder eye may be accomplished and shall be checked in a  
horizontal position.  
(4) When 2 or more cranes are used to lift a single load, 1 designated employee shall direct  
the rigging, lift and movement.  
(5) A locomotive crane shall not be rotated into a position where other railcars on an  
adjacent track might strike it, except where it has been ascertained that cars are not moving  
on the adjacent track and flag protection has been provided.  
(6) Specified tire pressures shall be maintained.  
History: 1979 AC.  
R 408.11933 Attaching and holding load.  
Rule 1933. (1) A load shall be attached to the hook by means of a sling or other lifting  
device. The hoist rope shall not be wrapped around a load except when setting or removing  
a pole.  
Page 8  
(2) Before starting to hoist, the operator shall make sure:  
(a) The hoist rope is not kinked.  
(b) The multiple part lines are not twisted around each other.  
(c) The hook is not swinging when brought over the load.  
(3) An employee shall not be permitted to pass or stand under a suspended load.  
(4) An operator shall not load a crane beyond the rated load. A load which is limited by  
structural competence rather than by stability shall be checked by the operator to determine  
that the weight does not exceed the rated load.  
History: 1979 AC.  
R 408.11934 Moving load.  
Rule 1934. (1) In moving a load, an operator shall avoid sudden acceleration and  
deceleration of a movement of the boom which would cause  
a swinging action by the load.  
(2) An operator shall not move a load or hook if an employee is on it.  
(3) A load shall be secured and balanced before it is lifted more than 6 inches.  
(4) An operator shall test the hoisting brakes before moving a near rated load by raising  
the load a few inches and applying the hoisting brakes. This requirement applies to both  
single or multiple line reeving.  
(5) A load or boom shall not be lowered below a point where less than 2 full wraps of  
rope remain on the drum.  
(6) A load shall not be moved in a manner to contact obstructions.  
(7) The rotational speed of a crane shall be such that the center of the load does not swing  
out beyond the radius of the point sheave in use. A tag line shall be used when rotation of  
the load would be hazardous.  
History: 1979 AC.  
R 408.11935 Moving load.  
Rule 1935. (1) A crane shall not be used for dragging a load sideways.  
(2) A load shall not be lifted over the front area of a truck crane, unless it is within the  
capacity of the rating chart for the front area of the truck crane.  
(3) Floats or pads secured to outriggers shall be used when the load to be handled at a  
particular radius exceeds the rated load without outriggers (see R 408.11923). A wood  
block used to support an outrigger shall be:  
(a) Of such size as to prevent shifting and toppling of the load.  
(b) Of such strength to resist crushing.  
(c) Free of defects such as knots and cracks which could affect its ability to support the  
load.  
(4) Before lifting a load with a locomotive crane not using outriggers, a means shall be  
provided to prevent carrying the load on the truck springs. Rail clamps shall not be used to  
restrain a locomotive crane from tipping.  
(5) Before moving with a load, a designated employee shall determine:  
(a) Position to carry the load.  
Page 9  
(b) Boom location.  
(c) Ground conditions.  
(d) Travel route.  
(e) Speed of movement.  
(f) Location of overhead wires.  
(6) A crane, while moving from 1 location to another, shall have:  
(a) The boom carried in line with the direction of movement.  
(b) The superstructure secured against rotation, except when negotiating a turn with an  
operator in the cab or the boom on a dolly.  
(c) An empty hook restrained against movement.  
(7) A crane with or without a load shall not travel with the boom at a height that it may  
bounce back over the cab.  
(8) A crane operating at a fixed radius shall have the boom-hoist pawl or other positive  
locking device engaged.  
History: 1979 AC.  
R 408.11936 Operating near power line.  
Rule 1936. (1) Any overhead wire shall be considered an energized line until a  
representative of the owner or utility has checked and indicated otherwise.  
(2) Before any crane operation is started near a power line the owner or utility  
representative shall be notified.  
(3) Except where electrical power lines and equipment have been deenergized and visibly  
grounded at the point of work or where an insulating barrier, not a part of the crane, has  
been erected, or the employee is insulated or isolated from the crane, a crane shall maintain  
clearances in accordance to the following:  
Clearance in transit with  
Voltage  
Clearance Boom Raised  
Boom Lowered and No.  
Load  
To 50 KV  
Over 50 KV  
50 to 345 KV  
346 to 750 KV  
10 Feet  
4 Feet  
-
10 Feet + .4 inch per KV  
-
-
10 Feet  
16 Feet  
(4) A cage-type boom guard, insulating link, or proximity warning device may be used,  
but their use shall not change the requirement of subrule (3).  
History: 1979 AC.  
R 408.11937 Work platform requirements.  
Page 10  
Rule 1937. If a work platform is attached to the loadline of a crawler, locomotive, or truck  
crane, the employer shall comply with the provisions of Construction Safety Standard Part  
10 “Lifting and Digging Equipment,” as referenced in R 408.11902.  
History: 1989 AACS; 2013 AACS.  
R 408.11941 Cabs and operating enclosures.  
Rule 1941. Clothing, personal belongings, tools, and other articles within a cab or  
operating enclosure shall be stored in cabinets, boxes, or other means so as not to interfere  
with access or operations.  
History: 1979 AC.  
R 408.11942 Fire extinguishers.  
Rule 1942. A portable dry powder fire extinguisher with not less than 5 BC rating, or  
equivalent, shall be kept in the cab, or in the operating enclosure, or on the unit. The  
operator and maintenance employees shall be trained in its use.  
History: 1979 AC.  
R 408.11943 Refueling.  
Rule 1943. (1) A crawler, locomotive, or truck crane fuel tank shall not be refueled while  
the engine is running.  
(2) When refueling is done with portable containers, the containers shall be safety cans  
which have automatic closing caps. The containers shall be approved by underwriters  
laboratories, inc., factory mutual laboratory, or other nationally recognized laboratory.  
(3) A person shall not smoke, and sources of sparks and flame shall not be located, within  
25 feet of a refueling operation.  
History: 1979 AC; 1989 AACS.  
INSPECTION  
R 408.11951 Inspection records and inspector.  
Rule 1951. (1) The inspection of a crawler, locomotive, or truck crane covered by R  
408.11952 to R 408.11956 shall be made by an authorized and trained employee or outside  
service.  
(2) Records shall be maintained of inspection results of monthly inspections on brakes,  
hooks, and ropes, and semi-annual inspections of hydraulic relief pressure valves.  
History: 1979 AC.  
Page 11  
R 408.11952 Initial inspections.  
Rule 1952. A crawler, locomotive, or truck crane shall be inspected prior to initial use  
and after modification to insure compliance with this part.  
History: 1979 AC.  
R 408.11953 Frequent inspections.  
Rule 1953. (1) A crawler, locomotive, or truck crane shall be given the following daily to  
monthly visual inspections:  
(a) Control mechanisms for wear and malfunction, each daily use.  
(b) Deterioration or leakage of air or hydraulic systems, each daily use.  
(c) Hydraulic system for oil level, each daily use.  
(d) Hydraulic hoses and fittings for leaks and deterioration.  
(e) All running ropes, each daily use.  
(f) Lifting hooks for deformation or cracks. A hook having a crack, a throat opening of  
more than 15% of normal or more than 10 degree twist from the plane of an unbent hook  
shall be replaced.  
(g) Rope reeving in conformance with the original installation.  
(h) Electrical apparatus for malfunction, wear, dirt, and moisture accumulations.  
(i) Tires for specified pressure.  
(2) A crawler, locomotive, or truck crane shall be given a visual inspection not less than  
monthly for malfunction of safety devices.  
History: 1979 AC.  
R 408.11954 Periodic inspections.  
Rule 1954. A crawler, locomotive, or truck crane shall be given the following monthly to  
yearly inspections:  
(a) Structural members and boom for cracks, deformation, and corrosion.  
(b) Bolts and rivets for tightness.  
(c) Sheaves, drums, pins, bearings, shafts, gears, rollers, locking, and clamping devices  
for wear, distortion, and cracks.  
(d) Power sources for performance.  
(e) Brake and clutch system parts, linings, pawls, and ratchets for excessive wear.  
(f) Load, boom angle, and other indicators for inaccuracies over their full range.  
(g) Travel, steering, braking, and locking devices for malfunction.  
(h) Tires for wear or damage.  
(i) Radiators and oil coolers for leakage, blockage of air passages and improper  
performance.  
(j) Rust on piston rods and control valves.  
(k) Oil strainers and filters for blockage.  
History: 1979 AC.  
Page 12  
R 408.11955 Wire rope inspection.  
Rule 1955. (1) Running ropes in continuous service shall have an inspection not less than  
once a month. The inspection shall include:  
(a) Measurement of diameter of rope.  
(b) Count of broken wires in 1 lay when concentrated.  
(c) End connections for broken wires.  
(d) Corrosion, kinking, crushing, cutting, or other conditions affecting the capability of  
the rope.  
(e) Cracked, bent, worn, corroded, or improperly applied end connectors.  
(2) For rope in contact with equalizer sheaves or with saddles, or on sheaves where rope  
travel is limited, the inspection shall include moving the rope from its normal position on  
the sheave and examining the rope at the rope contact point.  
(3) Inspection of a nonrotating type rope shall include the determination that the wires are  
not broken or worn within the rope.  
(4) A rope which has been idle more than 1 month, shall be given a complete inspection  
prescribed in subrule (1) before being placed in service.  
History: 1979 AC.  
R 408.11956 Occasional and out of service inspections.  
Rule 1956. (1) A crawler, locomotive or truck crane which has been idle more than 1  
month, but less than 6 months shall receive an inspection as prescribed in R 408.11953 and  
R 408.11955 before being placed in service.  
(2) A crawler, locomotive or truck crane, which has been idle more than 6 months, shall  
receive an inspection as prescribed in R 408.11953 or R 408.11954 and R 408.11955 before  
being placed in service.  
(3) A standby crawler, locomotive or truck crane shall be inspected at not less than 6  
month intervals as prescribed in subrule (1).  
History: 1979 AC.  
R 408.11957 Tests for crawler, locomotive and truck cranes.  
Rule 1957. (1) A crawler, locomotive or truck crane, prior to initial use and after  
modification, shall be given an operational test to insure compliance with this part,  
including the following:  
(a) Load hoisting and lowering mechanisms.  
(b) Boom hoisting and lowering mechanisms.  
(c) Travel mechanism.  
(d) Safety devices.  
(e) Boom extension mechanisms for a mobile hydraulic crane.  
(2) A test load for a crawler, locomotive or truck crane shall not exceed 110% of the rated  
load at any working radius.  
(3) Results of operational tests and load tests shall be maintained at the job site.  
(4) Where rerating is necessary, it shall be as prescribed in Section 5-2.2 of Chapter 5-2  
of ASME B30.5 “Crawler, Locomotive and Truck Cranes,” 1968 edition, as adopted in R  
Page 13  
408.11902. Rerating shall not be in excess of the original load rating unless a letter of  
approval is obtained from the manufacturer and maintained at the job site.  
History: 1979 AC; 2013 AACS.  
MAINTENANCE  
R 408.11971 Maintenance generally.  
Rule 1971. (1) An employer shall establish and maintain a preventative maintenance  
program under the supervision of an authorized and trained employee or outside service.  
(2) Before adjustments and repairs to a crawler, locomotive, or truck crane are started, the  
following steps shall be taken:  
(a) The crawler, locomotive, or truck crane shall be placed where it does not interfere with  
other operations.  
(b) A "warning" or "out of order" sign shall be placed at the controls, and the controls  
shall be in the "off" position. The sign need not be used if the energy source is locked out.  
(c) The power plant shall be disconnected, locked out, or made safe by other means.  
(d) The boom shall be lowered to the ground or otherwise secured against dropping.  
(e) All hydraulic cylinders used for boom hoist and boom telescope on a mobile hydraulic  
crane shall be retracted.  
(f) Hydraulic oil pressure from all hydraulic circuits shall be relieved before loosening or  
removing hydraulic components of a mobile hydrauliic crane.  
(g) The load block shall be lowered to the ground or otherwise secured against dropping,  
except when operation is necessary for the adjustment.  
(3) After adjustments and repairs have been completed, the crawler, locomotive or truck  
crane shall not be returned to operations until all guards have been installed, safety devices  
activated, trapped air removed from the hydraulic system of a mobile hydraulic crane and  
maintenance equipment and warning signs or out of order signs removed.  
(4) Hazardous conditions disclosed by the inspection requirements of R 408.11952 to R  
408.11956 shall be corrected before operation of the crawler, locomotive, or truck crane is  
resumed.  
(5) Adjustments shall be maintained to assure correct functioning of such components as  
operating mechanisms, safety devices, control systems, power plants, brakes and clutches.  
(6) The original safety factor shall be maintained when repairs and replacements are  
made. Hooks showing defects indicated in R 408.11953 shall be replaced. Pitted or burned  
electrical contacts affecting their operations shall be replaced in sets.  
(7) A crane or its wire rope shall not be used as a ground or to carry current. The ground  
shall be attached to the part being welded while welding.  
History: 1979 AC.  
R 408.11972 Maintenance; wire rope.  
Rule 1972. (1) Running wire ropes shall be replaced when they show 6 random broken  
wires in 1 rope lay or 3 broken wires in 1 strand of a rope lay; wear of 1/3 of the original  
Page 14  
diameter of outside individual wires; kinking, crushing or bird caging; heat damage;  
reduction in nominal diameter of 3/64 inch for ropes to 3/4 inch, 1/16 inch for ropes 7/8  
inch to 1 1/8 inch, 3/32 inch for ropes 1 1/4 inch to 1 1/2 inch.  
(2) A standing wire rope shall be replaced if it has more than 2 broken wires in 1 lay in a  
section beyond an end connection or 1 broken wire at an end connection.  
(3) A wire rope having more than 1 broken wire at a socketed fitting shall be resocketed.  
(4) Wire rope shall be stored in a manner to prevent damage or deterioration and handled  
in a manner to prevent kinking or twisting.  
(5) Before cutting preformed rope, seizing shall be placed on each side of the cut to  
prevent unlaying of the strands. On nonpreformed rope 7/8 inch in diameter or smaller, 2  
seizings shall be placed on each side of the cut, and for nonpreformed rope more than 7/8  
inch in diameter, 3 seizings on each side shall be used.  
(6) During installation, wire rope shall not be dragged in dirt or around sharp objects.  
History: 1979 AC.  
Page 15  
;