Current through Register Vol. 47, No. 12, March 26, 2025
(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.
Exception:
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.
TABLE XVII MAXIMUM LOAD RATINGS FOR MOBILE
CRANES
| Type of mobile crane
mounting |
Maximum load ratings (Percentages of
tipping loads) |
| Crawler without outriggers ....... |
75 |
| Crawler, outriggers fully extended ....... |
85 |
| Truck and wheel mounted (with or without
outriggers fully extended) ....... |
85 |
(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.
Exception:
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.
