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The Piatt Place project in downtown Pittsburgh used a Potain HDT 80 self-erecting tower crane to add three residential floors where a narrow street and very little setup space made conventional lifting arrangements difficult. The project team reported that the crane’s small outrigger footprint allowed installation while pedestrians continued moving, and that its remote control and relocation method simplified daily operations. Those are project-reported benefits from a 2010 case study, not independently measured comparisons.
The former Lazarus-Macy’s department store was being converted into a mixed-use building, with steel reinforcement and floor construction taking place in compact 30-by-30-foot bays. The case shows how footprint, public access, lift sizes and relocation needs can determine crane selection on an urban site.
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Piatt Place was a conversion of Pittsburgh’s former 265,000-square-foot Lazarus-Macy’s department store. The completed mixed-use plan described by Building Design + Construction included 180,000 square feet of office space, 65 residential units and a 500-car parking garage below the building. The construction team also added three floors for new residential units.
Reinforcement work began in June 2007. Adding floors to an existing urban structure meant that steel and metal decking had to be delivered and lifted in a constrained working area rather than across an open suburban site. The lifting-services provider, Century Steel Erectors, therefore had to select equipment that could operate close to the building without taking over the adjoining street.
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| Project detail | Figure reported in the case study |
|---|---|
| Existing building | Former 265,000-square-foot Lazarus-Macy’s department store |
| Planned office space | 180,000 square feet |
| Residential program | 65 units, including three newly added floors |
| Parking | 500-car garage below |
| Reinforcement start | June 2007 |
| Typical work bays | 30 feet by 30 feet |
These figures describe that historical project and should not be read as current capacity or layout specifications for other Piatt Place work.
Why was the site difficult for crane operations?
The decisive constraint was the street, not simply the building’s size. Century Steel Erectors project manager Chuck McKee said lifting had to take place in a narrow street and that available space was very limited. A crane with a large ground footprint could have blocked pedestrian movement, consumed more of the roadway or required a different traffic arrangement.
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On a tight urban site, the ground-level footprint affects nearly every other operation. Outriggers, counterweights, delivery vehicles, concrete trucks, worker access and temporary barriers all compete for the same limited area. The crane also has to be positioned so its working envelope reaches the steel bays without creating an unacceptable conflict with the public or adjacent properties.
The case study does not provide a full traffic-management plan, street-closure schedule, permit record or measured pedestrian-flow result. It does establish that keeping people moving was an explicit selection requirement and that the project team regarded the crane’s compact support arrangement as a way to meet it.
Why did the team choose a self-erecting tower crane?
Century Steel Erectors selected a Potain HDT 80 self-erecting tower crane. American Contractors, the local Potain dealer, supplied the crane for the work. McKee explained the decision this way: “We chose the HDT 80 because lifting work had to take place in a narrow street. Space was very limited. But with the small outrigger footprint, we could set up the crane and keep pedestrians moving.”
That statement identifies the primary fit: a self-erecting tower crane could be established in the available street space without demanding a large spread of ground supports. The term describes a tower crane designed to assemble and raise its working structure using its own erection system, rather than requiring the same type of large external assembly operation associated with a conventional top-slewing tower crane. On this project, the practical value was not an abstract equipment label; it was the ability to place lifting capacity where the street geometry allowed it.
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A self-erecting arrangement can be attractive when a project needs tower-crane reach but has little room for a fixed base, mobile-crane assembly or extended road occupation. It still requires engineering review, a suitable bearing surface, exclusion controls and a plan for deliveries and dismantling. The Piatt Place report confirms the footprint advantage observed by the project team, but it does not publish foundation reactions, wind limits, reach diagrams or a comparison with specific competing models.
How were the lifts organized inside the building?
The work proceeded in 30-foot-by-30-foot bays. That regular bay size gives a useful picture of the operating rhythm: steel crews could work through repeatable areas while the crane supplied beams and decking to the next location. The reported loads included header beams weighing up to 4,500 pounds, infill beams weighing about 1,500 pounds and bundles of metal floor deck weighing up to 4,500 pounds.
Those numbers matter because crane selection is a combination of weight, radius and frequency. A 4,500-pound header is not evaluated only by whether the crane can lift 4,500 pounds at some radius; the team must confirm capacity at the actual pick point, account for rigging, maintain clearance from the structure and coordinate the landing location. A deck bundle may weigh as much as a header while having a different shape and wind exposure. The case study gives the weights but not the lifting radii, heights, rigging arrangements or utilization percentage.
For a contractor studying a similar site, the useful method is to map every planned pick: identify the heaviest item, the farthest pick, the required landing zone, the delivery path and the sequence in which bays will be released. The crane’s load chart and the engineer’s foundation or outrigger design then determine whether the proposed location is workable. The Piatt Place experience illustrates why these calculations must be tied to the actual street and bay layout rather than to a headline maximum capacity.
What did the small outrigger footprint change?
The project team’s reported benefit was coexistence between crane setup and public movement. McKee said the crane could be set up while pedestrians continued moving. In a dense downtown setting, that can avoid a choice between stopping the lift or closing the entire frontage, although the report does not say that pedestrian access was uninterrupted at every moment or independently verify the result.
A compact footprint can also simplify coordination with adjacent work. More of the street may remain available for material deliveries, worker access or emergency passage. Those advantages depend on the actual outrigger reactions, surface strength, overhead obstructions and required safety clearances. A small footprint does not eliminate the need for barricades, a controlled exclusion zone or a spotter where site rules require one.
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Before committing to a location, the project engineer and lifting supervisor would normally document the support points, bearing pressures, underground utilities, overhead lines, façade setbacks and public-protection measures. None of those detailed calculations appears in the 2010 report, so they should not be inferred from the crane model alone.
How did remote control affect the crew?
The case study reports that the crane’s remote control allowed the crew to eliminate what the article calls the “radio man.” McKee described that as a labor-cost saving. In practical terms, the operator could control the crane without a separate person dedicated solely to relaying commands by radio.
The report does not quantify the number of hours saved, the staffing level before and after the change, or the project’s total labor cost. The sensible conclusion is therefore limited: the project team considered remote control useful for reducing one communication role in its lifting operation. It is not evidence that every site can remove a signal person. Visibility, blind lifts, local safety rules, lift complexity and the need for a dedicated signaler still govern how a crew must be staffed.
Remote operation also changes the communication plan. A crew should establish who has authority to direct a lift, which signal protocol applies, how radio and visual commands are confirmed and what happens when the operator loses sight of the load. The Piatt Place article identifies the labor implication but does not describe its exact communication procedures.
How quickly could the crane be relocated?
McKee said a move to another location took five or six hours, which he characterized as faster than moving a normal top-slewing tower crane. This is a project-reported relocation time, not a standardized benchmark. The article does not identify the distance moved, the number of workers, the transport equipment, the ground preparation or the comparison crane’s model and method.
Even with those limits, relocation time is an important planning variable on a site divided into work zones. If a crane can be repositioned within a working shift, the team may be able to serve separate areas without leaving a large crane in one place for the entire structure. The schedule benefit depends on what must be disconnected, whether the next support location is ready, how traffic is controlled and whether inspections are required before lifting resumes.
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For a new project, the relocation plan should be written as a sequence rather than treated as a single number: stop and secure the crane, clear the work zone, prepare the next support points, move or transport the equipment, reassemble or reconfigure it, inspect it and release it for lifting. The five-to-six-hour figure can inform a preliminary discussion, but it cannot substitute for a site-specific method statement.
What should contractors evaluate on another tight urban site?
The Piatt Place case points to a decision framework rather than a universal equipment recommendation. A contractor comparing a self-erecting tower crane with another lifting method should examine the following factors together.
| Decision axis | Questions to answer before selection | What the Piatt Place report contributes |
|---|---|---|
| Ground footprint | Where can supports or outriggers sit, and what bearing capacity is available? | The team valued the HDT 80’s small outrigger footprint. |
| Street and pedestrian access | Can people, deliveries and emergency routes remain available during setup and lifts? | Keeping pedestrians moving was a stated reason for the choice. |
| Load and radius | What are the heaviest picks, their radii, heights and rigging arrangements? | Reported lifts included 4,500-pound headers and deck bundles and 1,500-pound infill beams. |
| Work-zone sequence | Will the crane serve repeated bays or need to move between locations? | The work was organized in 30-by-30-foot bays; a move was reported at five to six hours. |
| Labor and communication | Who operates, signals, rigs and controls exclusion zones? | The team reported that remote control eliminated a dedicated “radio man.” |
| Regulatory and engineering controls | What permits, inspections, wind limits, utility clearances and public-protection measures apply? | The case study does not publish these details; they must be established for each site. |
This framework keeps the decision tied to site conditions. It avoids treating the HDT 80 as a generally superior crane or assuming that the reported relocation and labor outcomes will repeat elsewhere.
What is the practical planning sequence?
- Survey the street and building edge. Record curb lines, sidewalks, utilities, overhead obstructions, adjacent façades, delivery access and the space available for supports.
- Build a pick schedule. List headers, infill beams, deck bundles and other loads with their weights, dimensions, rigging points, pick radii and landing locations.
- Test the proposed position. Use the selected crane’s load chart and engineering data to verify capacity, clearances, support reactions and the required working envelope.
- Protect public movement. Define barriers, exclusion zones, flagging or signal-person duties, delivery windows and emergency access. The Piatt Place team’s objective was to keep pedestrians moving, but the exact controls must be designed locally.
- Plan assembly and relocation. Identify how the crane arrives, where each support is prepared, what equipment is needed for setup and how a move will be inspected and released.
- Set communication rules. Decide when remote control is appropriate, who gives the command, how blind lifts are handled and when a dedicated signal person is mandatory.
- Document the limits. Keep current load charts, wind restrictions, inspection records, traffic controls and lift plans with the site documentation.
This sequence turns the case study’s lessons into checks that can be reviewed by the structural engineer, crane supplier, site superintendent and safety team before equipment arrives.
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1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errorsWhat does this case study prove—and what does it not?
It demonstrates a clear project logic: a narrow downtown street and limited setup area led Century Steel Erectors to select a self-erecting tower crane with a small outrigger footprint. The project team reported that pedestrians could keep moving, that remote control reduced one labor role and that relocating the crane took five or six hours. The work involved repeated 30-by-30-foot bays and lifts as heavy as 4,500 pounds.
It does not provide an independently measured schedule improvement, a total labor-cost figure, a quantified pedestrian-access result or a controlled comparison with another crane. Its reference to a “normal top-slewing tower crane” lacks a model, method and common test conditions. The report also dates from 2010, so it should not be used as a current specification sheet or as proof of present supplier relationships.
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For owners and designers, the broader lesson is to treat crane selection as part of urban logistics and public-space design. The best machine is the one whose support arrangement, reach, capacity, movement plan and staffing model fit the actual site constraints. The Piatt Place team’s choice worked within the conditions it faced; another project needs its own engineering and traffic analysis.
Why is the Piatt Place example still useful?
Urban additions often fail operationally when the lifting plan is considered after the building layout and street constraints are fixed. Piatt Place shows the reverse approach: the team recognized that lifting had to occur in a narrow street, identified pedestrian continuity as a requirement and selected equipment around that constraint. The crane’s value came from fitting the construction process into the public realm, not merely from lifting steel.
The example is also useful because it supplies concrete scale. A 30-by-30-foot bay, a 4,500-pound header and a five-to-six-hour reported move are more actionable starting points than a generic statement that a crane was “compact.” They allow a project team to ask whether its own bays, loads and relocation intervals are similar enough for the comparison to be meaningful.
Used with those qualifications, the 2010 Building Design + Construction report is a concise lesson in constraint-driven crane planning: start with the street, map the picks, protect the public, and verify every claimed benefit against the conditions of the new site.
Frequently Asked Questions
Was the crane selected because Piatt Place was a particularly tall building?
The cited report does not identify building height as the deciding factor. It attributes the selection to lifting in a narrow street, limited space, the small outrigger footprint and the need to keep pedestrians moving.
Did the project publish its total crane or labor savings?
No. The project team described remote control as saving labor costs, but the case study gives no dollar amount, staffing baseline or project-wide savings calculation. It also reports a five-to-six-hour move without presenting a standardized schedule comparison.
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No. The figures belong to a historical 2010 case study. Current capacity, configuration, availability and regulatory requirements must be confirmed from up-to-date engineering documentation and the supplier for the specific job.
Does the report describe the exact pedestrian-control setup?
No. It records the project manager’s statement that the small outrigger footprint allowed pedestrians to keep moving, but it does not list barriers, traffic permits, operating hours, signal-person assignments or measured pedestrian-flow results.
