Greenstone Structures Ltd

 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 drained back-cavity, as recommended by the manufacturer.
• Rendered external thermal insulation systems and/or insulated brick slip cladding systems applied to steel-framed structures must have drained back-cavity to meet the manufacturers design
• 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.
• Greenstone Structures Limited must be contracted for the design, manufacture and supply 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.

The Greenstone Light Gauge Steel Frame Building System

System Description

The Greenstone Structures system is a light gauge steel system for walls and floors of residential dwellings up to 10 stories high. The Greenstone Structures system is based on light gauge steel and formed from galvanized steel coils into C-section profiles used for wall studs and lattice floor joists using steel to a minimum grade of S350GD + Z275

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

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 drained back- cavity, as recommended by the manufacturer.
• Rendered external thermal insulation systems and/or insulated brick slip cladding systems applied to steel-framed structures must have drained back- cavity to meet the manufacturers design
• 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.
• Greenstone Structures Limited must be contracted for the design, manufacture and supply 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.