Seven Sisters Road Highbury

The Brief

One of the first projects delivered through a Joint Venture between St. William and National Grid. Initially Robert West were asked to assist with valuing options for redevelopment of the site, at 107 – 129 Seven Sisters Road, Highbury for a mixed use building with an adjacent National Grid primary substation. The initial brief was aimed at understanding if any significant structural and civil engineering savings could be made and was then extended to detailing foundations before structural and engineering services for Stages 1 – 4 were commissioned.

Value-Added Solution

Our engineers used the following techniques to produce the most efficient design:

  • the building column line above the car parking area was rationalised to remove columns
  • the orientation of walls at ground floor level was revised to reduce the transfer structure at first floor
  • stairmaster is being adopted for the new stair construction to mitigate the construction risks associated with falls
  • the RC frame will be specified to use materials which limit its carbon footprint
  • the reinforcement detailing will adopt the use of proprietary punching shear reinforcement systems, maximising steelwork efficiency
  • column positions and quantities have been optimised in conjunction with the architect
  • temporary openings in rear façade will be specified to support efficient construction methodologies
  • pre-cast columns will be specified on the eastern and western building faces, to support safe and efficient construction methodologies
  • a swept path analysis was undertaken and car park spaces modified to optimise the car park and building layout
  • shear connectors to be proposed at the building movement joint to mitigate the need for doubled-up columns adjacent to the joint
  • a Bauder lightweight green roof is proposed to limit loading and material use

Final Outcomes

A design that allows the Stage 3+ design to be fixed before further detailed design is undertaken at Stage 4.


St. William
  • Committed
  • Engaging
  • Professional
  • Confident
  • Adaptable

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