29 Cfr 1926.150

Note: 29 CFR Part 1926.1550 should read 1926.1501. §1926.550 was redesignated as
§1926.1501 in the Cranes and Derricks final published on August 9, 2010 (75 FR 4813).

Title 29: Labor
PART 1926—SAFETY AND HEALTH REGULATIONS FOR CONSTRUCTION
Subpart DD—Cranes and Derricks Used in Demolition and Underground Construction

§ 1926.1550 Cranes and derricks.
(a) General requirements. (1) The employer shall comply with the manufacturer's specifications and limitations applicable to
the operation of any and all cranes and derricks. Where manufacturer's specifications are not available, the limitations
assigned to the equipment shall be based on the determinations of a qualified engineer competent in this field and such
determinations will be appropriately documented and recorded. Attachments used with cranes shall not exceed the capacity,
rating, or scope recommended by the manufacturer.
(2) Rated load capacities, and recommended operating speeds, special hazard warnings, or instruction, shall be
conspicuously posted on all equipment. Instructions or warnings shall be visible to the operator while he is at his control
station.
(3) [Reserved]
(4) Hand signals to crane and derrick operators shall be those prescribed by the applicable ANSI standard for the type of
crane in use. An illustration of the signals shall be posted at the job site.
(5) The employer shall designate a competent person who shall inspect all machinery and equipment prior to each use, and
during use, to make sure it is in safe operating condition. Any deficiencies shall be repaired, or defective parts replaced,
before continued use.
(6) A thorough, annual inspection of the hoisting machinery shall be made by a competent person, or by a government or
private agency recognized by the U.S. Department of Labor. The employer shall maintain a record of the dates and results
of inspections for each hoisting machine and piece of equipment.
(7) Wire rope shall be taken out of service when any of the following conditions exist:
(i) In running ropes, six randomly distributed broken wires in one lay or three broken wires in one strand in one lay;
(ii) Wear of one-third the original diameter of outside individual wires. Kinking, crushing, bird caging, or any other damage
resulting in distortion of the rope structure;
(iii) Evidence of any heat damage from any cause;
(iv) Reductions from nominal diameter of more than one-sixty-fourth inch for diameters up to and including five-sixteenths
inch, one-thirty-second inch for diameters three-eighths inch to and including one-half inch, three-sixty-fourths inch for
diameters nine-sixteenths inch to and including three-fourths inch, one-sixteenth inch for diameters seven-eighths inch to
11/8inches inclusive, three-thirty-seconds inch for diameters 11/4to 11/2inches inclusive;
(v) In standing ropes, more than two broken wires in one lay in sections beyond end connections or more than one broken
wire at an end connection.
(vi) Wire rope safety factors shall be in accordance with American National Standards Institute B30.5–1968 or SAE J959–
1966.

(8) Belts, gears, shafts, pulleys, sprockets, spindles, drums, fly wheels, chains, or other reciprocating, rotating, or other
moving parts or equipment shall be guarded if such parts are exposed to contact by employees, or otherwise create a
hazard. Guarding shall meet the requirements of the American National Standards Institute B15.1–1958 Rev., Safety Code
for Mechanical Power Transmission Apparatus.
(9) Accessible areas within the swing radius of the rear of the rotating superstructure of the crane, either permanently or
temporarily mounted, shall be barricaded in such a manner as to prevent an employee from being struck or crushed by the
crane.
(10) All exhaust pipes shall be guarded or insulated in areas where contact by employees is possible in the performance of
normal duties.
(11) Whenever internal combustion engine powered equipment exhausts in enclosed spaces, tests shall be made and
recorded to see that employees are not exposed to unsafe concentrations of toxic gases or oxygen deficient atmospheres.
(12) All windows in cabs shall be of safety glass, or equivalent, that introduces no visible distortion that will interfere with the
safe operation of the machine.
(13) (i) Where necessary for rigging or service requirements, a ladder, or steps, shall be provided to give access to a cab
roof.
(ii) Guardrails, handholds, and steps shall be provided on cranes for easy access to the car and cab, conforming to
American National Standards Institute B30.5.
(iii) Platforms and walkways shall have anti-skid surfaces.
(14) Fuel tank filler pipe shall be located in such a position, or protected in such manner, as to not allow spill or overflow to
run onto the engine, exhaust, or electrical equipment of any machine being fueled.
(i) An accessible fire extinguisher of 5BC rating, or higher, shall be available at all operator stations or cabs of equipment.
(ii) All fuels shall be transported, stored, and handled to meet the rules of subpart F of this part. When fuel is transported by
vehicles on public highways, Department of Transportation rules contained in 49 CFR Parts 177 and 393 concerning such
vehicular transportation are considered applicable.
(15) Except where electrical distribution and transmission lines have been deenergized and visibly grounded at point of work
or where insulating barriers, not a part of or an attachment to the equipment or machinery, have been erected to prevent
physical contact with the lines, equipment or machines shall be operated proximate to power lines only in accordance with
the following:
(i) For lines rated 50 kV. or below, minimum clearance between the lines and any part of the crane or load shall be 10 feet;
(ii) For lines rated over 50 kV., minimum clearance between the lines and any part of the crane or load shall be 10 feet plus
0.4 inch for each 1 kV. over 50 kV., or twice the length of the line insulator, but never less than 10 feet;
(iii) In transit with no load and boom lowered, the equipment clearance shall be a minimum of 4 feet for voltages less than 50
kV., and 10 feet for voltages over 50 kV., up to and including 345 kV., and 16 feet for voltages up to and including 750 kV.
(iv) A person shall be designated to observe clearance of the equipment and give timely warning for all operations where it
is difficult for the operator to maintain the desired clearance by visual means;
(v) Cage-type boom guards, insulating links, or proximity warning devices may be used on cranes, but the use of such
devices shall not alter the requirements of any other regulation of this part even if such device is required by law or
regulation;

(vi) Any overhead wire shall be considered to be an energized line unless and until the person owning such line or the
electrical utility authorities indicate that it is not an energized line and it has been visibly grounded;
(vii) Prior to work near transmitter towers where an electrical charge can be induced in the equipment or materials being
handled, the transmitter shall be de-energized or tests shall be made to determine if electrical charge is induced on the
crane. The following precautions shall be taken when necessary to dissipate induced voltages:
( a ) The equipment shall be provided with an electrical ground directly to the upper rotating structure supporting the boom;
and
( b ) Ground jumper cables shall be attached to materials being handled by boom equipment when electrical charge is
induced while working near energized transmitters. Crews shall be provided with nonconductive poles having large alligator
clips or other similar protection to attach the ground cable to the load.
( c ) Combustible and flammable materials shall be removed from the immediate area prior to operations.
(16) No modifications or additions which affect the capacity or safe operation of the equipment shall be made by the
employer without the manufacturer's written approval. If such modifications or changes are made, the capacity, operation,
and maintenance instruction plates, tags, or decals, shall be changed accordingly. In no case shall the original safety factor
of the equipment be reduced.
(17) The employer shall comply with Power Crane and Shovel Association Mobile Hydraulic Crane Standard No. 2.
(18) Sideboom cranes mounted on wheel or crawler tractors shall meet the requirements of SAE J743a–1964.
(19) All employees shall be kept clear of loads about to be lifted and of suspended loads.
(b) Crawler, locomotive, and truck cranes. (1) All jibs shall have positive stops to prevent their movement of more than 5°
above the straight line of the jib and boom on conventional type crane booms. The use of cable type belly slings does not
constitute compliance with this rule.
(2) All crawler, truck, or locomotive cranes in use shall meet the applicable requirements for design, inspection, construction,
testing, maintenance and operation as prescribed in the ANSI B30.5–1968, Safety Code for Crawler, Locomotive and Truck
Cranes. However, the written, dated, and signed inspection reports and records of the monthly inspection of critical items
prescribed in section 5–2.1.5 of the ANSI B30.5–1968 standard are not required. Instead, the employer shall prepare a
certification record which includes the date the crane items were inspected; the signature of the person who inspected the
crane items; and a serial number, or other identifier, for the crane inspected. The most recent certification record shall be
maintained on file until a new one is prepared.
(c) Hammerhead tower cranes. (1) Adequate clearance shall be maintained between moving and rotating structures of the
crane and fixed objects to allow the passage of employees without harm.
(2) Each employee required to perform duties on the horizontal boom of hammerhead tower cranes shall be protected
against falling by guardrails or by a personal fall arrest system in conformance with subpart M of this part.
(3) Buffers shall be provided at both ends of travel of the trolley.
(4) Cranes mounted on rail tracks shall be equipped with limit switches limiting the travel of the crane on the track and stops
or buffers at each end of the tracks.
(5) All hammerhead tower cranes in use shall meet the applicable requirements for design, construction, installation, testing,
maintenance, inspection, and operation as prescribed by the manufacturer.
(d) Overhead and gantry cranes. (1) The rated load of the crane shall be plainly marked on each side of the crane, and if the
crane has more than one hoisting unit, each hoist shall have its rated load marked on it or its load block, and this marking
shall be clearly legible from the ground or floor.

(2) Bridge trucks shall be equipped with sweeps which extend below the top of the rail and project in front of the truck
wheels.
(3) Except for floor-operated cranes, a gong or other effective audible warning signal shall be provided for each crane
equipped with a power traveling mechanism.
(4) All overhead and gantry cranes in use shall meet the applicable requirements for design, construction, installation,
testing, maintenance, inspection, and operation as prescribed in the ANSI B30.2.0–1967, Safety Code for Overhead and
Gantry Cranes.
(e) Derricks. All derricks in use shall meet the applicable requirements for design, construction, installation, inspection,
testing, maintenance, and operation as prescribed in American National Standards Institute B30.6–1969, Safety Code for
Derricks.
(f) Floating cranes and derricks —(1) Mobile cranes mounted on barges. (i) When a mobile crane is mounted on a barge,
the rated load of the crane shall not exceed the original capacity specified by the manufacturer.
(ii) A load rating chart, with clearly legible letters and figures, shall be provided with each crane, and securely fixed at a
location easily visible to the operator.
(iii) When load ratings are reduced to stay within the limits for list of the barge with a crane mounted on it, a new load rating
chart shall be provided.
(iv) Mobile cranes on barges shall be positively secured.
(2) Permanently mounted floating cranes and derricks. (i) When cranes and derricks are permanently installed on a barge,
the capacity and limitations of use shall be based on competent design criteria.
(ii) A load rating chart with clearly legible letters and figures shall be provided and securely fixed at a location easily visible to
the operator.
(iii) Floating cranes and floating derricks in use shall meet the applicable requirements for design, construction, installation,
testing, maintenance, and operation as prescribed by the manufacturer.
(3) Protection of employees working on barges. The employer shall comply with the applicable requirements for protection of
employees working onboard marine vessels specified in §1926.605.
(g) Crane or derrick suspended personnel platforms —(1) Scope, application and definitions —(i) Scope and application.
This standard applies to the design, construction, testing, use and maintenance of personnel platforms, and the hoisting of
personnel platforms on the load lines of cranes or derricks.
(ii) Definitions. For the purposes of this paragraph (g), the following definitions apply:
(A) Failure means load refusal, breakage, or separation of components.
(B) Hoist (or hoisting) means all crane or derrick functions such as lowering, lifting, swinging, booming in and out or up and
down, or suspending a personnel platform.
(C) Load refusal means the point where the ultimate strength is exceeded.
(D) Maximum intended load means the total load of all employees, tools, materials, and other loads reasonably anticipated
to be applied to a personnel platform or personnel platform component at any one time.
(E) Runway means a firm, level surface designed, prepared and designated as a path of travel for the weight and
configuration of the crane being used to lift and travel with the crane suspended platform. An existing surface may be used
as long as it meets these criteria.

(2) General requirements. The use of a crane or derrick to hoist employees on a personnel platform is prohibited, except
when the erection, use, and dismantling of conventional means of reaching the worksite, such as a personnel hoist, ladder,
stairway, aerial lift, elevating work platform or scaffold, would be more hazardous, or is not possible because of structural
design or worksite conditions.
(3) Cranes and derricks —(i) Operational criteria. (A) Hoisting of the personnel platform shall be performed in a slow,
controlled, cautious manner with no sudden movements of the crane or derrick, or the platform.
(B) Load lines shall be capable of supporting, without failure, at least seven times the maximum intended load, except that
where rotation resistant rope is used, the lines shall be capable of supporting without failure, at least ten times the maximum
intended load. The required design factor is achieved by taking the current safety factor of 3.5 (required under paragraph
(b)(2)) of this section and applying the 50 per cent derating of the crane capacity which is required by paragraph (g)(3)(i)(F)
of this section.
(C) Load and boom hoist drum brakes, swing brakes, and locking devices such as pawls or dogs shall be engaged when the
occupied personnel platform is in a stationary working position.
(D) The crane shall be uniformly level within one percent of level grade and located on firm footing. Cranes equipped with
outriggers shall have them all fully deployed following manufacturer's specifications, insofar as applicable, when hoisting
employees.
(E) The total weight of the loaded personnel platform and related rigging shall not exceed 50 percent of the rated capaciy for
the radius and configuration of the crane or derrick.
(F) The use of machines having live booms (booms in which lowering is controlled by a brake without aid from other devices
which slow the lowering speeds) is prohibited.
(ii) Instruments and components. (A) Cranes and derricks with variable angle booms shall be equipped with a boom angle
indicator, readily visible to the operator.
(B) Cranes with telescoping booms shall be equipped with a device to indicate clearly to the operator, at all times, the
boom's extended length, or an accurate determination of the load radius to be used during the lift shall be made prior to
hoisting personnel.
(C) A positive acting device shall be used which prevents contact between the load block or overhaul ball and the boom tip
(anti-two-blocking device), or a system shall be used which deactivates the hoisting action before damage occurs in the
event of a two-blocking situation (two block damage prevention feature).
(D) The load line hoist drum shall have a system or device on the power train, other than the load hoist brake, which
regulates the lowering rate of speed of the hoist mechanism (controlled load lowering.) Free fall is prohibited.
(4) Personnel platforms —(i) Design criteria. (A) The personnel platform and suspension system shall be designed by a
qualified engineer or a qualified person competent in structural design.
(B) The suspension system shall be designed to minimize tipping of the platform due to movement of employees occupying
the platform.
(C) The personnel platform itself, except the guardrail system and personal fall arrest system anchorages, shall be capable
of supporting, without failure, its own weight and at least five times the maximum intended load. Criteria for guardrail
systems and personal fall arrest system anchorages are contained in subpart M of this Part.
(ii) Platform specifications. (A) Each personnel platform shall be equipped with a guardrail system which meets the
requirements of subpart M, and, shall be enclosed at least from the toeboard to mid-rail with either solid construction or
expanded metal having openings no greater than1/2inch (1.27 cm).
(B) A grab rail shall be installed inside the entire perimeter of the personnel platform.

(C) Access gates, if installed, shall not swing outward during hoisting.
(D) Access gates, including sliding or folding gates, shall be equipped with a restraining device to prevent accidental
opening.
(E) Headroom shall be provided which allows employees to stand upright in the platform.
(F) In addition to the use of hard hats, employees shall be protected by overhead protection on the personnel platform when
employees are exposed to falling objects.
(G) All rough edges exposed to contact by employees shall be surfaced or smoothed in order to prevent injury to employees
from punctures or lacerations.
(H) All welding of the personnel platform and its components shall be performed by a qualified welder familiar with the weld
grades, types and material specified in the platform design.
(I) The personnel platform shall be conspicuously posted with a plate or other permanent marking which indicates the weight
of the platform and its rated load capacity or maximum intended load.
(iii) Personnel platform loading. (A) The personnel platform shall not be loaded in excess of its rated load capacity. When a
personnel platform does not have a rated load capacity then the personnel platform shall not be loaded in excess of its
maximum intended load.
(B) The number of employees occupying the personnel platform shall not exceed the number required for the work being
performed.
(C) Personnel platforms shall be used only for employees, their tools, and the materials necessary to do their work, and
shall not be used to hoist only materials or tools when not hoisting personnel.
(D) Materials and tools for use during a personnel lift shall be secured to prevent displacement.
(E) Materials and tools for use during a personnel lift shall be evenly distributed within the confines of the platform while the
platform is suspended.
(iv) Rigging. (A) When a wire rope bridle is used to connect the personnel platform to the load line, each bridle leg shall be
connected to a master link or shackle in such a manner to ensure that the load is evenly divided among the bridle legs.
(B) Hooks on overhaul ball assemblies, lower load blocks, or other attachment assemblies shall be of a type that can be
closed and locked, eliminating the hook throat opening. Alternatively, an alloy anchor type shackle with a bolt, nut and
retaining pin may be used.
(C) Wire rope, shackles, rings, master links, and other rigging hardware must be capable of supporting, without failure, at
least five times the maximum intended load applied or transmitted to that component. Where rotation resistant rope is used,
the slings shall be capable of supporting without failure at least ten times the maximum intended load.
(D) All eyes in wire rope slings shall be fabricated with thimbles.
(E) Bridles and associated rigging for attaching the personnel platform to the hoist line shall be used only for the platform
and the necessary employees, their tools and the materials necessary to do their work, and shall not be used for any other
purpose when not hoisting personnel.
(5) Trial lift, inspection, and proof testing. (i) A trial lift with the unoccupied personnel platform loaded at least to the
anticipated liftweight shall be made from ground level, or any other location where employees will enter the platform, to each
location at which the personnel platform is to be hoisted and positioned. This trial lift shall be performed immediately prior to
placing personnel on the platform. The operator shall determine that all systems, controls and safety devices are activated
and functioning properly; that no interferences exist; and that all configurations necessary to reach those work locations will

allow the operator to remain under the 50 percent limit of the hoist's rated capacity. Materials and tools to be used during the
actual lift can be loaded in the platform, as provided in paragraphs (g)(4)(iii) (D), and (E) of this section for the trial lift. A
single trial lift may be performed at one time for all locations that are to be reached from a single set up position.
(ii) The trial lift shall be repeated prior to hoisting employees whenever the crane or derrick is moved and set up in a new
location or returned to a previously used location. Additionally, the trial lift shall be repeated when the lift route is changed
unless the operator determines that the route change is not significant (i.e. the route change would not affect the safety of
hoisted employees.)
(iii) After the trial lift, and just prior to hoisting personnel, the platform shall be hoisted a few inches and inspected to ensure
that it is secure and properly balanced. Employees shall not be hoisted unless the following conditions are determined to
exist:
(A) Hoist ropes shall be free of kinks;
(B) Multiple part lines shall not be twisted around each other;
(C) The primary attachment shall be centered over the platform; and
(D) The hoisting system shall be inspected if the load rope is slack to ensure all ropes are properly stated on drums and in
sheaves.
(iv) A visual inspection of the crane or derrick, rigging, personnel platform, and the crane or derrick base support or ground
shall be conducted by a competent person immediately after the trial lift to determine whether the testing has exposed any
defect or produced any adverse effect upon any component or structure.
(v) Any defects found during inspections which create a safety hazard shall be corrected before hoisting personnel.
(vi) At each job site, prior to hoisting employees on the personnel platform, and after any repair or modification, the platform
and rigging shall be proof tested to 125 percent of the platform's rated capacity by holding it in a suspended position for five
minutes with the test load evenly distributed on the platform (this may be done concurrently with the trial lift). After
prooftesting, a competent person shall inspect the platform and rigging. Any deficiencies found shall be corrected and
another proof test shall be conducted. Personnel hoisting shall not be conducted until the proof testing requirements are
satisfied.
(6) Work practices. (i) Employees shall keep all parts of the body inside the platform during raising, lowering, and
positioning. This provision does not apply to an occupant of the platform performing the duties of a signal person.
(ii) Before employees exit or enter a hoisted personnel platform that is not landed, the platform shall be secured to the
structure where the work is to be performed, unless securing to the structure creates an unsafe situation.
(iii) Tag lines shall be used unless their use creates an unsafe condition.
(iv) The crane or derrick operator shall remain at the controls at all times when the crane engine is running and the platform
is occupied.
(v) Hoisting of employees shall be promptly discontinued upon indication of any dangerous weather conditions or other
impending danger.
(vi) Employees being hoisted shall remain in continuous sight of and in direct communication with the operator or signal
person. In those situations where direct visual contact with the operator is not possible, and the use of a signal person would
create a greater hazard for that person, direct communication alone such as by radio may be used.
(vii) Except over water, employees occupying the personnel platform shall use a body belt/harness system with lanyard
appropriately attached to the lower load block or overhaul ball, or to a structural member within the personnel platform

capable of supporting a fall impact for employees using the anchorage. When working over water, the requirements of
§1926.106 shall apply.
(viii) No lifts shall be made on another of the crane's or derrick's loadlines while personnel are suspended on a platform.
(7) Traveling. (i) Hoisting of employees while the crane is traveling is prohibited, except for portal, tower and locomotive
cranes, or where the employer demonstrates that there is no less hazardous way to perform the work.
(ii) Under any circumstances where a crane would travel while hoisting personnel, the employer shall implement the
following procedures to safeguard employees:
(A) Crane travel shall be restricted to a fixed track or runway;
(B) Travel shall be limited to the load radius of the boom used during the lift; and
(C) The boom must be parallel to the direction of travel.
(D) A complete trial run shall be performed to test the route of travel before employees are allowed to occupy the platform.
This trial run can be performed at the same time as the trial lift required by paragraph (g)(5)(i) of this section which tests the
route of the lift.
(E) If travel is done with a rubber tired-carrier, the condition and air pressure of the tires shall be checked. The chart capacity
for lifts on rubber shall be used for application of the 50 percent reduction of rated capacity. Notwithstanding paragraph
(g)(3)(i)(E) of this section, outriggers may be partially retracted as necessary for travel.
(8) Pre-lift meeting. (i) A meeting attended by the crane or derrick operator, signal person(s) (if necessary for the lift),
employee(s) to be lifted, and the person responsible for the task to be performed shall be held to review the appropriate
requirements of paragraph (g) of this section and the procedures to be followed.
(ii) This meeting shall be held prior to the trial lift at each new work location, and shall be repeated for any employees newly
assigned to the operation.
[44 FR 8577, Feb. 9, 1979; 44 FR 20940, Apr. 6, 1979, as amended at 52 FR 36382, Sept. 28, 1987; 53 FR 29139, Aug. 2,
1988; 54 FR 15406, Apr. 18, 1989; 54 FR 24334, June 7, 1989; 58 FR 35183, June 30, 1993; 59 FR 40730, Aug. 9, 1994;
61 FR 5510, Feb. 13, 1996. Redesignated at 75 FR 48134, Aug. 9, 2010]