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The Post Building wins 2021 World Architecture Festival Award

Alfred Hall Monaghan Morris’ The Post Building has won the ‘Completed Buildings – Mixed Use’ category at the prestigious WAF Awards. Invisible Connections’ RVK telescopic connectors were used to support precast stair landings off core walls at this impressive development.

A former Royal Mail sorting office in central London, The Post Building has been transformed from a 1960s industrial building into a modern, high-performing building with a mix of office, retail, residential and community uses.

The Post Building

The Post Building on New Oxford Street, London

Frame retention, facade invention delivers aesthetic, structural and environmental benefits

The monumental structural frame was wrapped in an entirely new façade. Inside, the exposed structure and services celebrate the industrial history of the building.

The existing building was a large, but relatively lightweight, steel-framed structure with concrete floors. Demanding urban site constraints, including the ‘Mail Rail’ system below the building, as well as the adjacent Central line and Crossrail, meant that new and additional loads imposed on the ground had to be carefully considered by the structural engineers, Arup.

Reusing frame and substructure elements maximised space and contributed to minimising material usage. The scheme has achieved a BREEAM ‘Excellent’ and LEED Gold rating.

RVK stair landing connector

RVK stair landing connector and REDiBOX wall recess former

Inherent robustness and ease of installation

At The Post Building, standard and pinned RVK connectors were used to support precast landings in the in-situ stair core. The standard RVK101 is suitable for most stair landing applications, whereas the pinned RVK101-30 enables robustness to be achieved where only two walls of the landing are available for connection.

RVK 101 and RVK101-30 telescopic connectors

RVK 101 (left) and RVK101-30 (right) telescopic connectors

All Invisible Connections’ telescopic connectors are designed to work in conjunction with a REDiBOX permanent recess former: a ‘left in’ component which creates recesses in precast or in situ walls, ready to receive the sliding inner.

During construction of The Post Building, the Project Engineer at Expanded Limited, remarked on how well REDiBOX had been received on site.

REDiBOX Permanent Recess Formers

REDiBOX Standard (left) and REDiBOX Pinned (right) wall recess formers

Elegant and efficient solution

Primarily intended to support precast stairs and landings off core walls, RVK connectors offer an elegant and efficient alternative to traditional rolled steel angles (RSAs) or corbels. Perfect for landings which are screeded to level, or which have other floor coverings, the RVK’s bolt ejection method enables easy site deployment and is a trusted ‘go-to’ solution for specifiers and contractors.

Advantages of choosing RVK connectors instead of RSA or corbels include:

  • Inherent robustness compliance and fire resistance
  • Clean architectural lines and increased usable headspace
  • More environmentally sustainable
  • Significantly improved site health and safety
  • Demonstrable cost and time efficiencies*
    *A study found that using telescopic connectors instead of RSAs reduced direct costs by 33% and man hours by 80%.

If you’d like to learn more about how our range of telescopic connectors can be used to invisibly connect precast concrete elements such as landings to walls, or beams to columns, please arrange a webinar. To discuss a specific project requirement, please contact us.

The World Architecture Festival runs from 1-3 December 2021 and is the world’s largest annual international architecture event. Find out more about the Festival here.

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