Hiring Cranes for RTUs – Where to Start

Replacing or installing a Rooftop Unit (RTU) is a high-stakes logistical challenge that requires a perfect synchronization of crane power and rigging expertise. Because these units are often placed on multi-story commercial buildings with limited roof access, a “one-size-fits-all” approach to lifting can lead to costly delays or safety hazards. Hiring a crane for an RTU project starts with understanding the specific reach and weight requirements of your building. This guide will walk you through the essential steps of planning a successful crane lift to ensure your HVAC equipment is positioned safely and accurately.

Looking for a crane and operator to lift an RTU? Contact Sullivan Industrial Services to Get Started!

Where to Start When Planning an RTU Crane Lift

The planning phase should begin with a detailed site survey to determine the exact pick and set points for the unit. You must account for the distance from the crane’s staging area to the final curb location on the roof, as this radius dictates the size and capacity of the crane required. You may want to involve a rigging specialist early in the process to evaluate the structural integrity of the staging ground and to identify any overhead obstructions like power lines. Starting with a professional lift plan ensures that the crane scheduled for the job has the necessary boom length and counterweight to handle the unit at full extension.

Key Factors When Hiring a Crane for RTU Installation

Selecting the right crane involves a technical calculation of distance, weight, and environmental obstacles.

Roof Access and Lift Radius Considerations

The radius is the horizontal distance between the center of the crane’s rotation and the center of the RTU’s final position on the roof. As the radius increases, the lifting capacity of the crane decreases significantly, meaning a unit that weighs 5,000 pounds might require a much larger crane if it needs to be set 100 feet back from the edge of the building. It is vital to measure this distance accurately to avoid a problematic situation on the day of the lift where the crane cannot safely reach the designated curb.

Weight and Dimensions of the Rooftop Unit

Before hiring a crane, you must have the exact wet weight of the RTU, which includes any internal fluids, curbs, or supplemental curb adapters. Even a slight discrepancy in weight can push a crane past its safe load chart limits, especially when working at high altitudes or long reaches. One must also consider the physical dimensions of the unit to ensure that the rigging gear, such as spreader bars, is sized correctly to prevent the unit’s cabinet from being crushed by the lifting cables.

Site Access for Crane Placement

A massive crane requires a massive footprint, and you must ensure the ground at the job site can support the weight of the machine and its outriggers. This often involves coordinating with local municipalities for street closures or securing permits to set up in a busy parking lot or alleyway. You will probably also need to evaluate the soil stability and the presence of underground utilities to ensure that the crane can be leveled and stabilized without causing damage to the surrounding infrastructure.

Preparing the Job Site Before the Crane Arrives

A successful lift day is built on the preparation work finished before the crane even pulls onto the property.

Coordinating with HVAC Contractors and Installers

Communication between the rigging team and the HVAC contractors is essential to ensure the roof curbs are flashed and ready for the new unit the moment it is lowered. You should synchronize the arrival of the crane with the delivery of the RTU so that the equipment can be lifted directly from the flatbed to the roof, eliminating the need for double handling. This coordination ensures that the crane time is used as efficiently as possible.

Clearing Staging Areas and Lift Zones

Safety protocols require that a drop zone be established and cleared of all non-essential personnel and vehicles before the lift begins. This involves marking off a wide perimeter around the crane and the building to ensure that the path of the load is never over an occupied space. Work with building management to ensure that the areas directly beneath the lift path are evacuated, providing an extra layer of security for everyone involved in the project.

Safety Considerations for RTU Crane Lifts

Safety is the paramount concern during any overhead lift, and it starts with a rigorous inspection of all rigging hardware, including slings, shackles, and spreader bars. We perform a dry run of the crane’s movements to check for wind speeds and weather conditions that could cause the load to become unstable. You can also have someone use standardized hand signals and radio communication to provide the crane operator with a second set of eyes, ensuring the unit is lowered with millimeter precision.

When to Hire a Rigging Team Alongside the Crane

While a crane operator moves the machine, a rigging team is responsible for everything that happens between the hook and the load. Hiring a professional rigging crew is essential when the RTU must be maneuvered around rooftop obstructions or when the unit needs to be skated into a position that the crane cannot reach directly. Riggers provide the technical expertise to balance lopsided loads and to ensure that the unit is set down softly enough to protect the building’s roofing membrane and structural steel.

We Move Machines & Equipment Across CT & the North East

Sullivan Industrial Services is warehoused in Milford, CT with a second location in Bloomfield, CT, and serves small and large businesses throughout Connecticut and the North East including but not limited to:

Hire Sullivan Industrial Services for Your Next RTU Crane Project

Sullivan Industrial Services provides a comprehensive solution for RTU installations, combining expert rigging with precision crane coordination. We take care of it all from supplying the cranes to handling the actual lift. We understand that HVAC equipment is a critical investment, and we treat every lift with the technical respect and safety-first mindset it requires. From navigating tight urban site access to executing complex long-radius lifts, our team has the experience and specialized equipment to get your rooftop units in place quickly and safely.

For specific queries or more information, reach out to us at contact@sullivanindustrialservices.com or give us a call at 203-859-4238. We’re here to provide tailored solutions for all your machinery skating and rigging needs.