SPEEDSHAFT | Eleventen Systems

SpeedShaft is an innovative prefabricated, stay-in-place concrete wall formwork system engineered for mid-rise cold-formed steel construction. Delivered as panelized wall assemblies, each unit is precision-built with cold-formed steel and includes factory-installed reinforcing steel, reducing field labor, accelerating installation, and ensuring consistent quality.

Once installed, SpeedShaft walls serve as the primary vertical elements of the building’s lateral force-resisting system (shear walls), providing strength, reliability, and code-compliant performance. By seamlessly integrating structural performance with offsite prefabrication, SpeedShaft streamlines construction, shortens schedules, and delivers a fully integrated lateral system.

Lateral System for Mid-Rise Construction

Installation takes place concurrently with elevated floor framing. Eliminating the need to "top out" shafts before vertical construction continues.

No requirement to construct traditional cast-in-place or CMU shear walls ahead of floor framing.

Removes sequencing bottlenecks that can delay floor framing progress, by reducing the stacking of trades within the same vertical zone.

The wall panel crew will install the lateral system, eliminating a trade. No separate formwork contractor is required on CFS framing levels which reduces coordination issues.

Reinforcing steel is pre-installed in the factory, reducing field labor, layout risk and on-site materials and handling.

Expect integrated structural components such as built-in deck support angles, guardrail system, and coordination with slab and framing system.

A clean architectural finish makes this system suitable for exposed interior shaft conditions, by eliminating rough cast-in-place wall finishes and providing a linear plank appearance on exposed surfaces.

Simplify compliance and points of contention with elevator inspectors and AHJs with a no-ledge elevator shaft condition.

SpeedShaft panels are filled with concrete the same day slab on metal deck placement reducing concrete crew and or pump truck mobilization.

Reduce reliance on tower crane operations by eliminating repeated picks for loose formwork, reinforcing steel, and related materials. Prefabricated panels and shop-installed components minimize lifts, streamline sequencing, and free up crane capacity for critical path activities.

Eliminates vertical trade stacking and overhead work zones. No crews working above framing levels or above one another, reducing fall risk and falling object exposure. Creates a safer environment for field personnel and inspectors with more controlled and predictable work zones.