12 CRR-NY 23-8.2NY-CRR

12 CRR-NY 23-8.2
12 CRR-NY 23-8.2
23-8.2 Special provisions for mobile cranes.
(a) Inspection.
(1) A mobile crane which is moved from one job site to another without dismantling beyond the folding of the boom and such additional dismantling as may be necessary for that purpose is not required to be inspected before being first erected or operated on each job site to which it is moved, providing the monthly inspections are performed on schedule.
(2) The inspection and repair of mobile crane booms shall be made only when such booms are lowered and adequately supported.
(b) Footings and outriggers.
(1) Footings.
A firm footing shall be provided for every mobile crane. Where such firm footing is not naturally available, it shall be provided by substantial timbers, cribbing or other structural members sufficient to distribute the load so as not to exceed the safe bearing capacity of the underlying material.
(2) Outriggers.
(i) Means shall be provided to hold all outriggers of mobile cranes in their retracted positions while such cranes are traveling and in their extended positions when blocked for hoisting.
(ii) Where used on mobile cranes, power-operated jacks shall be provided with means to prevent loss of jack support under load.
(iii) Each outrigger on a mobile crane shall be visible from its actuating location.
(iv) Means shall be provided to securely fasten outrigger floats to the outriggers when in use.
(c) Hoisting the load.
(1) Before hoisting a load the person directing the lift shall see that the mobile crane is level and, where necessary, blocked.
(2) Before hoisting any load at a new job site, the boom of a mobile crane shall be test operated to its maximum height.
(3) Loads lifted by mobile cranes shall be raised vertically so as to avoid swinging during hoisting except when such operations are permitted by the capacity chart. A tag or restraint line shall be used when rotation or swinging of any load being hoisted by a mobile crane may create a hazard.
(4) When a mobile crane is operated at a fixed radius, the boom-hoist pawl or other positive locking device shall be engaged.
(d) Mobile crane travel.
(1) A mobile crane traveling to or from one job site to another or traveling on a street or highway shall not carry any jibs, attachments, buckets or other devices or material attached in any way to the boom whether the boom is in the folded position or not.
A hydraulic crane where the jib is permanently hinged to the boom or any crane where the manufacturer authorizes that the design of such crane guarantees the safe transport of the jib or other attachments.
(2) Mobile cranes shall not travel with suspended loads unless such crane is under the control of a competent, designated person who shall be responsible for the position of the load, boom location, ground support, travel route and speed of movement.
(3) A mobile crane, with or without load, shall not travel with the boom so high that it may bounce back over the cab.
(e) Counterweights for mobile cranes.
Counterweights shall be provided for and used on mobile cranes as specified by the manufacturers or builders of such cranes or by professional engineers licensed to practice in the State of New York. A mobile crane shall not be operated without the full amount of ballast or counterweight in place. Mobile cranes that do not have the ballast or counterweight attached may be operated temporarily with special care when handling light loads. The ballast or counterweight in place on any mobile crane shall not exceed the manufacturer's or builder's specifications.
(f) Mobile crane construction.
(1) Booms.
(i) Booms, boom sections and jibs of every mobile crane shall be constructed of suitable steel and shall be used only for the purposes recommended by the manufacturer or builder of such mobile crane.
(ii) The boom of any mobile crane shall not be raised from the level of the surface on which the crane rests other than by the use of its own hoisting capabilities. The design, construction and length of any boom shall be such that there is no undue stress imposed on the crane structure or mechanism during such raising operations.
(iii) Boom stops shall be provided on mobile cranes to prevent overtopping.
(iv) Any boom extension used on a mobile crane which is not provided by the manufacturer or builder of the crane shall be designed by a professional engineer licensed to practice in the State of New York. A copy of the design plans for such boom extension shall be kept at the job site available for examination by the commissioner.
(2) Braking mechanism. In addition to the hoisting mechanism brakes required by this Subpart, every mobile crane shall be provided with the following:
(i) An adequate braking mechanism for the boom hoist.
(ii) A swing lock or swing brake capable of preventing rotation.
(iii) A brake or other equivalent device adequate to bring the mobile crane to a stop from any travel for which such crane is designed, together with a means of locking such mobile crane so as to hold it stationary.
(3) Boom sheave guard.
The sheave at the end of a mobile crane boom on which the hoisting rope operates shall be provided with a guard to prevent the rope from leaving the sheave in case of rope slack or any other condition.
(g) Mobile crane capacity charts.
(1) Load ratings for mobile cranes.
(i) Load ratings shall not exceed the percentages listed in Table XVII of this Subpart of the tipping loads for mobile cranes.
(ii) The stability of mobile cranes will be influenced by such factors as freely suspended loads, track, wind or ground conditions, condition and inflation of tires, boom lengths and proper operating speeds for existing conditions. All such factors shall be taken into account in determining mobile crane stability.
Type of mobile crane mountingMaximum load ratings (Percentages of tipping loads)
Crawler without outriggers
Crawler, outriggers fully extended
Truck and wheel mounted (with or without outriggers fully extended)
(2) Mobile crane capacity chart required.
(i) Every mobile crane shall be provided with a capacity chart which shall be posted and maintained clearly legible in the cab of the crane visible to the crane operator from his operating position. Such chart shall set forth the safe loads which may be hoisted by such crane at various lengths of boom at various boom angles and radial distances. Where outriggers are provided, such safe loads shall be set forth on the capacity chart with and without the use of the outriggers. Such chart shall also indicate whether or not such handling accessories as hooks, blocks and slings are included.
(ii) Unless furnished by the manufacturer or builder of the mobile crane, the required capacity chart shall be prepared and certified by a professional engineer licensed to practice in the State of New York and a copy thereof submitted, on request, to the commissioner.
(iii) No load shall be lifted by any mobile crane that exceeds the relevant maximum specified by its capacity chart.
(h) Boom angle indicator.
Every mobile crane having either a boom exceeding 40 feet in length or a maximum rated capacity exceeding 15 tons shall be provided with an approved boom angle indicator. Such boom angle indicator shall indicate the boom angle in degrees and shall be clearly visible to the mobile crane operator from his operating position at all times. Such boom angle indicator shall emit a visible or audible warning signal whenever the boom angle is unsafe.
Boom angle indicators are not required to be operative when such mobile cranes are used for excavation work with clamshells or dragline buckets.
(i) Unauthorized operation.
The operator's cab of every mobile crane shall be kept locked whenever the operator is not present. No unauthorized person shall enter the cab of or remain immediately adjacent to any mobile crane in operation. Ignition locks, locking bars or other equivalent devices shall be provided to prevent unauthorized operation of mobile cranes.
(j) Operation of a mobile crane with a demolition ball.
In addition to the general requirements of this Part (rule) for mechanical demolition, the operation of a mobile crane with a demolition ball shall be subject to the following provisions:
(1) The weight of any demolition ball shall not exceed 50 percent of the safe load capacity of the boom length used at its lowest angle of operation.
(2) During operation with a demolition ball the swing of the boom shall not exceed 30 degrees from the center line, front to back, of the crane mounting.
(3) The windows of such crane cabs shall be constructed of shatterproof glass or shall be protected by adequate metal screens.
(4) The load line and the attachment of the demolition ball to the load line shall be inspected at least twice daily.
(5) Truck-mounted mobile cranes without outriggers shall not be used with a demolition ball.
12 CRR-NY 23-8.2
Current through July 15, 2022
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