Invisible connections

Invisible Connections is currently working with precast concrete and DfMA specialist SCC Design Build to construct stair cores at Manchester Airport.

Manchester Airports Group (MAG) is undertaking a transformation programme that will position the airport as a ‘Global Gateway’, offering more routes and creating increased economic growth in line with aviation forecasts.

As part of this development the airport is expanding its terminal facilities, apron space and customer car parking facilities to accommodate increased demand.

With many MSCP projects already to its name, SCC Design Build (working for BAM) successfully manufactured and constructed the precast concrete frame and cores (incorporating flights and landings) at the newly completed 6,500 space ‘meet and greet’ MSCP at Terminal 1 and Terminal 3.

As part of its innovative build process, SCC Design Build (‘SCC’) used telescopic connectors by Invisible Connections extensively throughout the structural frame and cores, being SCC’s tried and trusted connection solution for rapid construction.

With a clear pedigree in car park construction and an existing presence on the airport, SCC was the natural choice by Galliford Try for the newest 7,669 space car park that will link to Terminal 3 and have buses to the other terminals.

Although a steel frame was chosen for this latest car park, SCC was appointed to construct the stair cores in precast concrete, chosen for its fire properties and the stabilisation of the structural steel frame.

There are 10 stair cores in total, which vary in height up to 5 storeys. All 10 cores incorporate precast flights and landings, with 6 of the cores also housing the lift-shafts.

Building on the success of several previous project collaborations, Invisible Connections was chosen by SCC for its landing-to-wall system of telescopic connectors. The RVK101-30 pinned connection detail was specified to tie landings to the core walls (tying into REDiBOX PIN recess formers) thereby satisfying the Engineer’s design requirements for robustness.

It’s increasingly common to combine precast concrete stairs and landings with core walls which are either precast or poured in-situ. When connection methods are left as an afterthought, using traditional rolled steel support angles is often the only practical, yet inefficient, fixing solution.

With a little up-front planning, there’s much to gain by incorporating telescopic connectors, which come with a host of advantages; such as improved health and safety, robustness compliance, and significantly improved cost effectiveness. Indeed, a recent study found that using telescopic connectors instead of rolled steel angles reduced man hours by 80%, which contributed to a total 33% reduction in direct costs.

For more information please visit www.invisibleconnections.co.uk.
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