Status

  • Under Assessment

Type

  • Design
  • Manufacture
  • PM Construction

Technology

  • Intelligent Steel Solutions Limited Light Gauge Steel Frame Building System

 

 

Intelligent Steel Solutions Limited Light Gauge Steel Frame Building System

The open panel system is manufactured offsite and erected at site. The system provides internal and external load bearing walls along with floor and roof cassettes.

The external walls are typically provided completely open or with a sheathing board to the external face. The floor cassettes are typically boarded on the upper face to provide a working crash deck (not the finished floor)

The system may be used to form individual site assembled panels, factory assembled volumetric units, or as infill to a primary structure. The system comprises a range of minimum S390GD + Z275 galvanised, 1.0 to 2.5 gauge, lightweight steel sections produced to BS EN 10326. Z450 or Z600 galvanising can be used where required due to site specific environmental conditions. C sections, typically 75 or 100mm form the internal and party walls. 150, 175, 200, 250 and 300mm deep C sections can be used for wall panels, floors and roof panels. Alternatively steel lattice joists may be used for floor and roof panels if required for span and loading conditions. The system construction is based upon the ‘warm frame’ principle where insulation is placed outside the structural frame but generally this is installed on site by others. Wall panels are constructed with U or C section top and bottom rails with C section studs of size and spacing commensurate with the structural design.

Durability Assessment – 60 years

 

Limits on scope

  • Maximum 10 storeys for loadbearing frames subject to structural analysis (with the incorporation of hot-rolled steelwork to achieve structural design parameters)
  • Bottom members in contact with foundations/sub-structure must be fully isolated from contact with moisture from the ground or external sources
  • Where lightweight gauge steel framing is used for ground floor construction, the ground below the floor must be sealed to prevent moisture entering the void, such as a membrane with 50mm oversite concrete, in accordance with the recommendations of Steel Construction Institute publication P262.
  • Where a lightweight gauge steel frame ground floor occurs over a void next to the ground, the void must be cross ventilated to a minimum standard of 1500mm2/linear metre, or 500mm2/m2 of floor area.
  • Masonry wall cladding cavities should be minimum 50mm and ventilated.
  • Conventional cladding, such as timber cladding, should have a minimum 25mm drained back-cavity, or as recommended by the manufacturer.
  • Rendered external thermal insulation systems and/or insulated brick slip cladding systems applied to steel-framed structures must have a minimum 25mm drained back-cavity.
  • Stainless steel fixings, such as channels for masonry retention systems, must be isolated from the galvanised steel to prevent bi-metallic corrosion where there is a risk of exposure to moisture.
  • Intelligent Steel Solutions Limited, or approved installer with ISS sign off 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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