• Approved


  • Design
  • Manufacture
  • Construction


  • Actavo Steel Framed Modular Solution

Actavo Building Solutions are a market leader in the UK and Ireland off-site construction market. Offering a full turnkey package for bespoke modular buildings across all market sectors. The innovative products and systems employed enables a fast track construction programme with superior quality, without compromising on design.

Actavo Steel Framed Modular Solution

The primary steel structure comprises hot rolled steel sections welded together with cold rolled sections bolted to them. The external wall infill panels are timber framed and comprise: breathable membrane; plywood external sheathing; air tightness barrier; plywood sheathing and insulated plasterboard

Durability Assessment: minimum 60 years

Limits on scope:

  • Maximum 7 storeys subject to structural analysis.
  • Bottom members in contact with foundations/sub-structure must be fully isolated from contact with moisture from the ground or external sources
  • Masonry wall cladding cavities should be ventilated
  • Conventional cladding, such as timber cladding, should have a minimum 25mm drained and ventilated back cavity
  • Rendered external thermal insulation systems and/or insulated brick slip cladding systems applied to timber-framed structures must have a minimum 15mm drained and ventilated back-cavity OR, in the absence of a cavity, any such application must be assessed to confirm that moisture accumulation would not exceed normal criteria for the avoidance of material degradation in the site specific climatic conditions likely to be experienced, evidenced by: a) Testing, eg MOAT 22 hygrothermal test or, b) ETAG 004 assessment, or c) Dynamic modelling, e.g., WUFI hygrothermal modelling (including 1% moisture penetration stress). Detailing should be considered to minimise the risk of water entering the structure at vulnerable junctions, for example window jamb/sill junctions
  • Adequate sub-floor ventilation must be maintained to the void below the ground floor (if present)
  • The floor void below the ground storey modules (if present) must be sealed to prevent moisture entering the void (membrane + concrete oversite)
  • Actavo Building Solutions UK Ltd. must be contracted for the design, manufacture, supply and erection of the structures.
  • A chartered structural engineer suitably experienced in the design of this type of structure must be sub-contracted for the structural analysis and design.
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