NY Crane Operator cheat sheet

Load moment = load weight × radius measured from the crane's rotation center to the load's center of gravity; capacity charts are load-moment limited, so doubling radius roughly halves capacity on a fixed boom.

Swinging a load increases effective radius and side load; centrifugal force grows with the square of swing speed, so keep swing speed low and start braking before the load reaches its target.

The load chart capacity already includes the boom, jib, hook block, and rigging deductions only when stated; always subtract the actual hook block, slings, and below-the-boom attachments from gross capacity.

A crane tips when the load moment exceeds the stability moment; outrigger floats must bear on stable soil or matting sized so bearing pressure stays under the soil's allowable capacity.

Wind acts on both the load's sail area and the boom; stop lifts when the manufacturer's or site's wind limit is reached, and never use a load's weight alone to judge wind susceptibility.

Two-blocking (hook block contacting the boom tip) is prevented by the anti-two-block device; never disable it, and lower the load before telescoping or booming out.

Personnel must never ride the load or the hook; the only permitted personnel lifting uses a manufacturer-approved man basket with a trial lift, and the crane must be rated for it.

Power line approach distances are minimum clearances to energized lines; if a load or boom contacts a line, the operator stays in the cab, warns others away, and waits for the utility to de-energize.

Shock loading from sudden stops or rapid hoist starts can exceed rated capacity; hoist and lower smoothly and keep the load lines vertical to avoid side loading the boom.

Crane operation in NYC is regulated under the NYC Construction Codes (Title 28 of the Administrative Code and Chapter 33 of the Building Code), which requires a licensed crane operator for hoisting operations.

The NYC crane operator license is issued by the Department of Buildings; applicants must meet experience, examination, and fitness requirements and carry the license while operating.

Cranes require DOB approval and a permit before erection or use; the permit identifies the crane, its location, and the approved configuration and must be kept current.

A licensed crane operator's duties include verifying the daily inspection, load chart availability, and that the crane is set up per the approved plans.

NYC requires notification to DOB before certain crane activities, including erection, jumping, and dismantling, and the work must follow an approved plan sealed by a licensed engineer.

Riggers and signalpersons working with cranes in NYC must hold the appropriate license or certification recognized by the Department; unlicensed rigging is a violation.

The licensed operator is responsible for refusing a lift that exceeds the load chart or that is unsafe, regardless of instructions from a supervisor or contractor.

Record-keeping obligations include maintaining inspection logs, operator certification records, and load test documentation, which DOB inspectors may request on site.

Sling tension in a two-leg bridle: tension per leg = (load weight × leg length) / (2 × vertical height), or load ÷ (2 × cos of the angle from vertical).

As the horizontal angle between sling legs decreases, tension rises sharply; at 30° from horizontal each leg carries the full load, and at 60° it carries about 0.58 of the load.

Working load limit (WLL) = breaking strength ÷ design factor; common design factors are 5 for wire rope slings, 5 for chain, and 7 for synthetic web slings.

Sling capacity is reduced by choke and basket configurations per the manufacturer's chart; a choker derates capacity, and basket hitches generally provide the highest efficiency.

Shackles, hooks, and master links must be rated and matched to the sling; never use a hook with a spread greater than the manufacturer allows or a hook that is not equipped with a latch.

Load chart capacity is based on a specific configuration (boom length, radius, counterweight, outrigger spread); changing any of these invalidates the chart value, and deductions for jib and hook block must be applied.

Rigging angle affects the load's center of gravity: an off-center pick tilts the load, so place the hook above the center of gravity or use tag lines and multiple attachment points.

Net capacity = gross chart capacity − weight of hook block, slings, spreader bars, and any below-the-boom attachments; the result must exceed the load weight plus a margin.

Daily pre-shift inspection covers wire rope for broken wires, kinks, and corrosion; hooks for cracks and throat opening; brakes; limit switches; and the anti-two-block device.

Wire rope removal criteria include broken wire counts in a lay length, diameter reduction from core failure, and severe corrosion or heat damage; follow the manufacturer's and applicable standard's limits.

Outriggers must be fully extended and set on floats or mats sized for the soil bearing capacity; never block under the outrigger beam or rely on the float alone on soft ground.

The crane must be level within the manufacturer's tolerance before lifting; a level condition is checked with the crane's level indicator, and out-of-level setup reduces capacity.

Setup requires a firm, drained, and compacted base; check for underground utilities, excavations, and slope, and keep the crane's swing radius barricaded.

Inspection records must be maintained and made available; periodic (monthly/annual) inspections are more thorough than daily checks and may require a qualified inspector.

After any overload, shock load, or contact with a power line, the crane must be taken out of service and inspected before returning to work.

Boom assembly and disassembly follow the manufacturer's procedures; pins, retainers, and boom sections must be verified, and the crane must be configured to the load chart in use.

Hand signals follow the standard set: raise/lower boom, raise/lower load, swing, stop, and emergency stop; the operator responds only to the designated signalperson or a stop signal from anyone.

The operator must stop immediately on any stop signal, regardless of who gives it; only the designated signalperson may direct other motions.

Radio communication requires a dedicated channel, clear call-outs of the command and the crane's response, and confirmation before movement; loss of communication means stop.

Before the lift, the operator, rigger, and signalperson agree on the lift plan, the load's weight, the radius, the path, and the tag line assignments.

Tag lines control rotation and swing; they are held by personnel outside the swing radius and never wrapped around hands or body parts.

Barricades and exclusion zones keep personnel out from under the load and out of the counterweight swing radius; the operator verifies the area is clear before swinging.

The signalperson must be in clear view of the operator or in continuous radio contact; if the view is blocked, a relay signalperson is used.

A pre-lift meeting confirms roles, the emergency stop signal, the wind limit, and the communication method; any change to the plan requires re-briefing.