Z-Stack™ | Modular Stair Tower-1
Z-Stack™ | Modular Stair Tower-2
Z-Stack™ | Modular Stair Tower-3
    Z-Stack™ | Modular Stair Tower-1
    Z-Stack™ | Modular Stair Tower-2
    Z-Stack™ | Modular Stair Tower-3
Z-Stack™ | Modular Stair Tower-1
Z-Stack™ | Modular Stair Tower-2
Z-Stack™ | Modular Stair Tower-3

Z-Stack™ | Modular Stair Tower

Tower Height:
Use Case:

Specs

Material

Marine-grade aluminum

Weight Capacity

1100 lbs per module

Compliance

OSHA / ANSI

Finish

Aluminum & Powder-Coated Red

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Due to the configurable nature of Z-Stack, please submit an RFQ and our access specialists will confirm the right setup and provide pricing.

Z-Stack™

The Lightweight, Modular Stair System

When access matters—and failure isn’t an option—Z-Stack™ is the answer
Z-Stack™ is a professional-grade modular stair tower system built to replace scaffolding, ladders, and temporary stair towers with a safer, faster, and far more capable solution. Engineered for serious jobs, it delivers stable, compliant vertical access without delays, rentals, or compromises. 

Specs

Product Information

Material

Marine-grade aluminum

Weight Capacity

1100 lbs per module

Compliance

OSHA / ANSI

Finish

Aluminum & Powder-Coated Red

Use Case

Temporary or Permanent Fixed Access

Assembly

Ships Flat-Packed or Assembled (Prices Vary)

Lead Time

1–2 Weeks

Environment

Outdoor

Calculator

Z-Stack™ Height Calculator

Enter your required vertical height and we’ll calculate the number of Z-Stack modules for both Standard and Compact towers. Z-Stack exits at the top of the tower. Finish recommendations follow SafeSmart’s planning rules below.

Feet
Inches

Finish rules (tower below target): ≤ 9.5" nothing added • 9.6–24" bridge • 24.1–48" AdjustaStairs • ≥ 48" add module

Note: This tool is intended for quick planning. Final selection depends on site conditions and project requirements.

Target Height
Results Updated

Standard Modules

36" Treads
Module exit height
Modules needed
Tie-offs needed
Tower exit height
Finish height

Finish Recommendation

Standard is typically preferred when crews want a wider stair path and more room for tools/material movement.

Compact Modules

24" Treads
Module exit height
Modules needed
Tie-offs needed
Tower exit height
Finish height

Finish Recommendation

Compact is commonly used when footprint is limited and a tighter tower layout is required for permanent installs.

Revolutionizing Vertical Access

Applications

Z-Stack is changing how vertical access is designed, built, and used. Instead of choosing between temporary or permanent systems, Z-Stack delivers a modular stair solution that adapts to both. On construction sites, it provides fast, reconfigurable access that keeps crews moving safely. In facility environments, it replaces outdated ladder systems with stable stair access built for daily use, material handling, and long-term safety. One system. Unlimited configurations. A smarter way to move vertically.

Temporary Access

Z-Stack is purpose-built for fast, repeatable access on active construction sites. Its modular design allows crews to build, adjust, and reposition stair towers as the job evolves—delivering safer access than ladders or scaffold stairs without slowing the schedule. Ideal for short-term elevations, multi-phase builds, and changing site conditions where speed, stability, and compliance matter.

Permanent Access

Z-Stack provides a safer, more practical alternative to fixed ladders and caged ladder systems in facility environments. Designed to support the movement of people, tools, and materials, Z-Stack offers stable stair access to rooftops and elevated areas without the need for ladder tie-offs or awkward climbs. The result is improved safety, easier material handling, and a permanent access solution that aligns with modern facility standards.
Built to Lift. Designed to Deploy.

Installing Z-Stack™

Z-Stack’s lightweight aluminum construction allows entire stair towers—or individual modules—to be craned directly into position with speed and precision. Whether shipped flat-packed, in modular sections, or fully assembled, Z-Stack is designed to deploy efficiently on site, minimizing handling time while maximizing flexibility across changing access requirements.
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