I work as a lift planning supervisor for contractors handling hospital extensions, city-centre refurbishments, and apartment projects squeezed between occupied buildings. I have spent more than a decade arranging rented cranes for sites where the operator cannot slew freely without crossing a boundary, road, roof, or neighbouring property. On these jobs, I rarely begin with lifting capacity alone. I begin by studying every place the boom, counterweight, hook, and suspended load could travel.
I Measure the Working Envelope Before Choosing a Crane
I treat the available swing radius as a three-dimensional space rather than a circle drawn around the crane. A plan may show clear ground around the machine while missing balconies, scaffold towers, temporary roofs, overhead cables, or an adjacent crane working above the same site. I once reviewed a project where the counterweight had less than 1.5 metres of clearance from a finished wall. That small gap changed the crane position, outrigger arrangement, and delivery sequence.
I ask for current site drawings, but I never depend on drawings alone. I walk the proposed setup area and compare the measurements with visible conditions, because hoarding lines and material stacks often move after the plan is issued. I also check roof projections, lighting columns, tree branches, and loading platforms that may sit outside the main building footprint. Small obstacles cause large problems.
I normally mark the tail swing, boom path, minimum working radius, maximum working radius, and load travel route on the same lifting sketch. That gives me a clearer picture of where separate restrictions overlap. If I have a 30-metre boom but can safely use only part of its slewing arc, I need to know whether every planned pickup and landing point remains reachable. I would rather discover one unreachable corner during planning than during a concrete panel delivery.
I Match the Crane Type to the Real Restriction
I do not assume that the smallest crane is always the safest choice for a confined site. A compact mobile crane may fit through the entrance, yet it can require a longer boom angle or a tighter setup position that creates poor lifting capacity at the required radius. In another case, a larger machine positioned farther from the building may work with a shorter effective radius and better load control. I compare the full load chart, not the model name printed on the side.
I often point project managers to a practical resource on crane rental planning for limited swing radius locations when they are comparing equipment choices for a restricted project. I use material like this to start a more useful conversation about site duration, boom movement, nearby structures, and the cost of keeping specialist equipment on site. The rental price matters, but it cannot be separated from access and operating limits.
I consider luffing jib cranes where horizontal oversailing is tightly controlled and the project has enough duration to justify erection costs. I consider mobile cranes for shorter lifting windows, provided the setup area can handle the outrigger loads and counterweight movement. Crawler cranes can suit some long projects, although their tracks and assembly requirements demand more space than clients sometimes expect. Each option solves one restriction while creating another.
A customer last spring initially requested a mobile crane with a 45-metre boom for a steel installation beside an occupied office. After checking the rear clearance, I found that the chosen machine could not rotate through the required angle with its planned counterweight configuration. I proposed a different crane with variable counterweight options and a revised setup position several metres away. The change looked minor on paper, but it prevented repeated repositioning during the lift.
I Plan Delivery and Assembly as Part of the Lift
I have seen good crane selections fail because nobody planned how the machine would reach the setup point. Restricted swing locations often sit behind narrow gates, temporary ramps, parked vehicles, or partially completed structures. One urban site had a gate opening of roughly 3.2 metres, while the delivery route included a turn that the transport trailer could not make in one movement. I arranged an early access trial before the crane booking was confirmed.
I identify how many transport vehicles are needed for counterweights, mats, jib sections, and rigging equipment. A crane may arrive on one carrier while another four vehicles queue nearby, and a congested street rarely has room for that convoy. I assign arrival windows so the crew can unload one component without blocking the next. I also check whether traffic management permits cover the assembly period rather than just the lifting shift.
I pay close attention to the order of assembly. In a confined yard, the crew may need to place mats and counterweights in their final locations before the crane enters, because there will be no turning space afterward. I sometimes reserve a small telehandler or auxiliary crane to handle components inside the restricted zone. That supporting machine can save hours of awkward manual handling.
I also leave a route for emergency access and site operations. It is easy to fill every available metre with crane equipment, delivery vehicles, and exclusion barriers. I make sure fire access, pedestrian routes, and critical building entrances remain usable unless an approved temporary closure is in place. A workable setup must serve the whole site.
I Control the Load Path Rather Than Trusting Operator Skill Alone
I have worked with excellent crane operators, but I never use experience as a substitute for a controlled load path. Limited swing radius locations leave little room for correcting a load that begins to rotate or drift. I plan each movement from pickup height to landing height, including the points where the operator must luff, hoist, or slew. The clearest lifts usually involve fewer combined movements.
I use taglines where they can be handled safely, but I do not assume a tagline will solve every rotation problem. Long facade panels and duct sections can catch wind even at modest heights, especially between buildings where air speeds change suddenly. On one refurbishment, a lightweight frame began turning as soon as it cleared the delivery truck. I stopped the lift and changed the rigging arrangement before trying again.
I define hard limits for boom and load movement during the briefing. These may include a marked no-slew sector, a minimum hook height above a roof edge, or a landing approach from only one direction. I prefer physical reference points that the operator and signaller can both identify. A vague instruction such as “stay clear of the building” is not enough when clearance is measured in centimetres.
Communication has to remain simple. I normally assign one primary signaller and confirm a backup method before the first load leaves the ground. Two-way radios are useful, but I also agree on standard hand signals in case a battery fails or interference blocks a message. I stop operations whenever the operator loses clear communication.
I Check Ground Conditions With the Same Care as Overhead Clearance
I cannot solve a swing restriction by moving the crane onto ground that will not support it. A new position may appear ideal until I discover a basement roof, drainage trench, service duct, or recently filled excavation beneath the outriggers. I request ground information early and involve a temporary works engineer where support conditions are uncertain. Guessing is expensive.
I calculate or obtain the expected outrigger reactions for the planned configuration, because the pressure is rarely distributed evenly across all four supports. The highest reaction can occur during a particular part of the slew, especially while the crane handles its heaviest load at the longest radius. I match the mat design to that critical condition. A generic stack of timber may be unsuitable even if it has worked on another project.
I once handled a lift where the preferred crane position sat partly over an old service tunnel. The tunnel was not shown clearly on the main construction plan, but a facilities manager remembered it from earlier maintenance work. I shifted the setup by about 2 metres and changed the lifting sequence to maintain capacity. That conversation prevented a serious support problem.
I Build Weather Limits Into the Rental Programme
I allow for weather delays before agreeing on the rental period. Tight sites often involve loads with large surface areas, and nearby buildings can funnel wind through narrow gaps. The forecast at ground level may not represent conditions near the boom tip. I use the crane manufacturer’s limits, the lift plan, and actual site readings rather than relying on a general weather app.
I also consider what happens if work stops halfway through the planned sequence. A load cannot be left hanging while the crew waits for a gust to pass, and a partially installed element may need temporary restraint. I identify safe set-down areas before lifting begins. On some sites, there is only one suitable place to return a load.
Rental scheduling needs enough flexibility to manage these pauses without forcing rushed decisions. I prefer a realistic two-day booking over a tightly priced single shift where every delay creates pressure to continue. That approach can cost more at the quotation stage, yet it often reduces overtime, aborted transport, and repeated setup fees. I explain that trade-off clearly rather than hiding it in a contingency line.
I Keep the Plan Usable for the Crew on the Ground
I have received lift plans filled with technical detail that nobody could read quickly during setup. I prepare drawings with clear crane positions, exclusion zones, load routes, and dimensional references tied to fixed site features. I also include the exact crane configuration, counterweight, boom length, reeving, and outrigger position. The information must match the machine that arrives.
I review the plan with the operator, lift supervisor, slinger, signaller, and site manager before work begins. Each person sees the site from a different angle, and I expect them to raise practical concerns. A signaller may notice that a scaffold screen blocks visibility from the proposed standing point. I would rather amend the plan at 7 a.m. than defend a drawing that does not work.
I record any agreed change instead of allowing an informal adjustment to become the new method. Moving the crane by 500 millimetres, reducing the outrigger spread, or changing the lifting accessory can affect capacity and clearance. Some changes require a fresh calculation or approval from the appointed person. I keep the process proportionate, but I do not treat small dimensional changes as harmless.
I have found that successful restricted-radius lifting depends on disciplined preparation more than clever improvisation. I measure the full operating envelope, select the machine around actual site limits, and plan every supporting movement before the rental clock starts. That work may add a few meetings and another site visit. It usually saves far more time once the crane is standing between two buildings with nowhere else to go.