The Post Building.

The Post Building

The Post Building Spiral Staircases

CDC Engineering designed, manufactured and installed two bespoke contemporary spiral staircases at The Post Building in London, working alongside BW Interiors and architects Allford Hall Monaghan Morris (AHMM).

The staircases are located on the 8th floor and were designed as a prominent architectural feature within the building’s contemporary interior.

Project Details

  • Project: The Post Building, London
  • Main Contractor: BW Interiors
  • Architect: Allford Hall Monaghan Morris
  • CDC Engineering Scope: Design, manufacture and installation
  • Duration: 24 weeks
  • Location: 8th floor

Bespoke Spiral Staircase Design

The project comprised two matching spiral staircases, positioned to mirror one another within the space.

One staircase follows a clockwise spiral, while the second rises anticlockwise, creating a balanced and distinctive arrangement.

As bespoke staircases, each element had to be carefully coordinated from design through to fabrication and installation to achieve the required geometry and fit within the building.

Materials and Finishes

The contemporary appearance of the staircases combines several specialist finishes:

  • Powder-coated steelwork for a durable, consistent architectural finish.
  • Stainless steel mesh forming the balustrade, providing both functionality and a lightweight visual appearance.
  • Anodised handrails providing a robust, clean finish suited to the high-use environment.

The combination of these materials creates a modern finish while retaining the practical requirements of a working staircase.

From Manufacture to Installation

Following the design stage, CDC Engineering manufactured the staircase components in-house, using precision fabrication and welding to achieve the required dimensions and geometry.

Installation then took place on the 8th floor, requiring careful coordination with BW Interiors and other trades working within the finished interior.

The bespoke nature and opposing orientation of the two staircases made accuracy throughout the manufacturing and installation process particularly important.

A Bespoke Engineering Solution

The completed staircases demonstrate CDC Engineering’s ability to deliver bespoke spiral staircases and architectural metalwork from design through to installation.

Working with BW Interiors and AHMM, our team turned a detailed architectural concept into two fully finished staircases that combine practical performance with a strong architectural presence.

CDC Engineering — bespoke engineering, fabrication and installation.

AutoCAD drawings prior manufacturing.

Intallation stage on site when all parts become connected.