111 Wall Street

Challenge

Converting a 1980s high-rise office building into residential units required new code-compliant egress stairs while maintaining continuous egress at all times. Structural openings could not be cut until replacement stairs were installed, placing the entire renovation schedule at risk. Tight Manhattan logistics, elevator-only access, and a highly fragmented floor-by-floor sequence added further complexity.

Solution

McGregor delivered a fully coordinated stair and structural opening solution by working field-backwards from day one. By self-performing structural steel and stair fabrication, McGregor sequenced installation to preserve egress, compressed detailing and fabrication timelines, and enabled immediate stair use with integrated safety systems including Top Tread and Alpha Rail.

Results

• Structural steel shipped within two weeks of award, keeping the project on schedule
• Stair fabrication and installation completed in weeks, not months, enabling downstream demolition and fit-out to proceed
• Continuous egress maintained throughout construction, eliminating safety risk and schedule disruption
• Reduced labor footprint with lean installation crews compared to traditional stair delivery
• Frictionless coordination with no stair-related RFIs delaying the project

Key Outcomes

• Faster stair lead time than traditional 12-week manufacturing cycles
• Safer, immediately usable stairs during construction
• Simplified logistics on a dense Manhattan site