EDAROTH

Description of the EDAROTH Hybrid Offsite Manufactured Housing Product

Factory assembled wall, floor and roof panel cassettes comprising hot-rolled steel ‘goalpost’ assemblies and the light gauge steel framed (LGSF) upper floors, external walls and roof cassettes are transported to site and assembled in sequence upon a prepared sub-structure. Wall and floor panels are delivered to site as closed panels with external/internal linings, insulation and services installed, leaving only structural and service connections to be made on site. The foundations and substructure are site specific.

Ground floor construction is generally beam and block or insitu concrete floor slab. The whole is structurally interconnected to provide composite action in accordance with the requirements of the UK structural codes and as specifically designed for each structure. A variety of wall claddings may be applied on site including, but not limited to, conventional masonry cladding, insulated render, a drained cavity external cladding system, rainscreen systems. Applied cladding relying on support from the structure must not exceed the loading limits for the structures. Roof finishes, internal wall finishes, fixtures and fittings are also added on site.

The system is intended for the construction of two and three storey (room-in-roof) mid-terrace, end-terrace and semi-detached houses. The system does not encompass detached houses at this stage. Apartments may also be constructed using the system.

A service life of 100 years is intended.

Limits on scope

• Maximum 3 storeys, (2+ room-in-roof), for single occupancy residential use;
• Bottom members in contact with foundations/sub-structure must be fully isolated from contact with moisture from the ground or external sources;
• Adequate sub-floor ventilation to meet Building Regulation requirements must be maintained to the void below suspended ground floors (minimum 1500mm2/m of external wall or 500mm2/m2 of floor area);
• Conventional masonry external cladding must include a 50mm minimum width back cavity;
• Insulated render and/or insulated brick slip cladding systems must include a minimum 15mm wide drained back cavity;
• Other cladding systems must have a minimum 25mm wide drained back cavity, or as recommended by the manufacturer.
• Only conventional brick cladding, supported at foundation level, is included in this assessment. Where other forms are cladding are used, and where support from the structure is required, structural and thermal/hygrothermal checks must be undertaken to ensure the durability of the system is not affected.
• Any penetrations through the external wall panels must be appropriately sealed to ensure no moisture reaches the LGS frame.
• When erecting the panels in inclement weather, suitable precautions must be implemented to ensure moisture-sensitive materials are protected.
• Structural calculations provided by EDAROTH for this assessment are intended to be for ‘proof of concept’ only. EDAROTH advise full structural calculations shall be undertaken by their approved frame sub-contractor on a project-by-project basis.
• EDAROTH 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 undertake the structural analysis and design.
• This assessment only applies to the components, elements, structure and construction as described in this assessment.

Description of the EDAROTH Offsite Manufactured Apartment Product

The EDAROTH system comprises of closed panel factory assembled Light Gauge Steel (LGS) external and internal wall panels, floor panels, roof panels, and prefabricated volumetric wet room and bathroom modules, Unified Service Modules, and balconies. These are assembled on site to form apartment units, corridors, bin stores, bike stores and plant rooms. Items such as the external envelope, sub-structure, cores, stairs, lifts and finishes are project specific. Central cores are intended to be constructed in precast concrete, and will contain a standardised stair case, lift and service riser. The core does not form part of the lateral stability system for the apartments, which are self-stable, but apartments will be connected to it for robustness.

The system is intended for the construction of up to six storey high apartment buildings, with the top floor being less than 18m above external ground level.

The external and internal wall, floor and roof panel cassettes comprising upper floors, external and internal walls and roof cassettes are transported to site and assembled in sequence on a prepared sub-structure. Foundations and substructure are project specific, and are not included in the apartment system. Ground floor construction is generally insitu concrete, though other forms, such as beam and block, may be used depending on requirements. The panels are structurally interconnected to provide composite action in accordance with the requirements of the UK structural codes and as specifically designed for each structure. A variety of wall claddings may be applied on site including, but not limited to, conventional masonry cladding, glass reinforced concrete, metal standing seam and brickslip systems. Applied cladding relying on support from the structure must not exceed the loading limits for the structures. Roof finishes, internal walls, finishes, suspended ceilings, fixtures and fittings are also added on site. Components such as electrical conduits and insulation are incorporated within the panels at the factory. Services connections are completed on site.

Limits on scope

• Maximum 6 storeys, not exceeding 18m high;
• Bottom members in contact with foundations/sub-structure must be fully isolated from contact with moisture from the ground or external sources;
• Adequate sub-floor ventilation to meet Building Regulation requirements must be maintained to the void below suspended ground floors (minimum 1500mm2/m of external wall or 500mm2/m2 of floor area);
• Conventional masonry external cladding must include a 50mm minimum width back cavity;
• Insulated render and/or insulated brick slip cladding systems must include a minimum 15mm wide drained back cavity;
• Other cladding systems must have a minimum 25mm wide drained back cavity, or as recommended by the manufacturer.
• Any penetrations through the external wall panels must be appropriately sealed to ensure no moisture reaches the LGS frame.
• When erecting the panels in inclement weather, suitable precautions must be implemented to ensure moisture-sensitive materials are protected.
• Structural calculations provided by EDAROTH for this assessment are intended to be for ‘proof of concept’ only. EDAROTH advise full structural calculations shall be undertaken by their approved frame sub-contractor on a project-by-project basis.
• EDAROTH 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 undertake the structural analysis and design.
• This assessment only applies to the components, elements, structure and construction as described in this assessment.