01 / Stairs & access

Stair-01

Single-spine steel staircase with timber treads, fabrication drawings and connection details.

Three-dimensional CAD presentation of Stair-01 with timber treads and a steel support spine.
Stair-01Timber and steel assembly
PROJECT OVERVIEW

Stair geometry for fabrication.

Timber treads are supported from a central 120 × 120 × 6 SHS spine, with the lower steps forming a separate site-dependent assembly.

INTERACTIVE 3D MODEL

Explore the stair assembly.

Rotate the model to view the treads, supports and central spine.

The interactive model cannot be displayed in this browser. The fabrication drawings below remain available.

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MODEL CONTROLS Drag to rotate · scroll or pinch to zoom · right-drag or two-finger drag to pan.

WORKSHOP GEOMETRY

Main flight and spine drawings.

Dimensions, support positions and transition details for fabrication.

Stair-01 main stair fabrication geometry drawing showing plan and side views, tread dimensions, central spine, stair angle and the separately fabricated lower two steps.
Main stair fabrication geometry

Tread width, rise, going, overlap and stair angle set out for fabrication; the lower two steps form a separate assembly.

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Stair-01 main spine fabrication detail showing SHS lengths, transition geometry and typical tread-support positions.
Main spine fabrication detail

Spine lengths, support positions and transition geometry prepared for fabrication.

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FABRICATED STEEL & CONNECTIONS

Steel assembly and tread connections.

Fabrication drawings and exploded connection detail.

Stair-01 steel-only fabrication assembly with plan arrangement, central spine, tread supports, top connection and bottom support details.
Steel fabrication assembly & connections

Spine, tread supports, plates and end connections on one fabrication reference.

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TYPICAL TREAD / SOLDIER CONNECTION

Timber tread, fixing plate, countersunk fasteners and fabricated soldier assembly.