Service Details

Post-tensioned staircases push stone to its limits. High-strength steel tendons are threaded through carefully drilled treads and tensioned after installation, placing the stone into permanent compression.

The result is a free-standing stair in solid stone that appears to float, combining architectural ambition with structural engineering at the highest level.

Stone Held in Perfect Tension

Self-Supporting,
Structurally Precise

Post-tensioning allows the staircase to support itself from within. Rather than relying on embedment into a load-bearing wall, the stone and steel work together as a single, self-supporting structure.

This unlocks forms that would otherwise be difficult to achieve in stone, from slender straight flights to sweeping curved stairs that appear to hang in space.

Our role is to hold all of this complexity on your behalf, structural engineering, stone selection, fabrication and installation, delivering a staircase that reads as an effortless object while meeting every modern structural requirement.

Engineering Elegance in Stone

Span Further,
Read More Lightly

Post-tensioned stone staircases offer a rare combination of structural innovation and sculptural presence. Stone spans further, turns tighter and reads more lightly than traditional approaches allow.

Quality control and compliance are built into every stage. From load testing to inspection, we ensure the finished staircase meets engineering, safety and building control standards.