Woodberry Down Kickstart - Projects - MLM
Woodberry Down Kickstart - Projects - MLM

Woodberry Down Kickstart Site 3 Block 1B in CLT Construction

Project Information
  • Location
  • London
  • Sector
  • Housing
  • Services
  • Buildings, Structural Engineering, Building Services Engineering, Civil Engineering, Environmental Impact Assessment
  • Value
  • £80m
Partners
  • Architect
  • Rolfe Judd and Wilkinson Eyre

Block 1B was one of four residential buildings forming the project and the only one to be constructed using a Cross Laminated Timber (CLT) structural frame. The building comprised five storeys of residential accommodation built on a thickened RC transfer slab over a single storey basement car park. The building was clad in brickwork, supported on shelf angles at every floor level. 120mm thick CLT wall panels formed the inner leaf of the external envelope and the primary partition walls within the building, on a rectangular grid of approximately 3.5m x 7.0m. The CLT floor panels were generally 140mm thick.

A particular challenge included the detailed engineering design of the connections between the CLT frame and the steel framed cantilever balconies. This involved sourcing specialist, long, angled screw fixings from Italy, close liaison with the balcony fabricator and then laboratory and full scale testing of the balconies to ensure adequate strength and stiffness. Another issue was the formation of corner windows, which incorporated concealed steel posts to ensure continuity of the cladding support over.

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