The Conport Flospan Building

Specifications for FLOSPAN A930 and A750 Buildings

Cladding Sheet Materials

• 20 gauge (0.9mm) Galvanised Steel A930 buildings for .75 kN snow load
• 22 gauge (0.7mm) A930 buildings where no snow loads are required or for double skin buildings with .75kN snow load
• 22 gauge (0.7mm) All A750 buildings.

Colour coated buildings are coated with 200 Micron Plastisol finish with a life to first maintenance of up to 25 years or with white lining enamel for economy versions.

All cladding material is manufactured from "Galvatite", a hot dipped zinc coated steel. The substrate is of grade Fe E280G commercial quality mild steel with a minimum yield stress of 280 N/mm2 . Galvanised coating is to a minimum thickness of 275 g/m2 with a conventional spangle finish. The steel substrate fully complies with the provisions of British Standard BSEN 10147: 1992.

All steel is profile rolled to comply with the provisions of BS 5427: 1976 in respect of materials, design, handling, working, performance and storage.

Base Framework and Door Frames Material

All framework materials are from cut lengths of hot rolled mild steel of HR15 commercial quality to comply with the provisions of BS 1449: Part 1: 1972. All components are pre-formed and punched where necessary and welding operations carried out as required prior to hot dip galvanising to provide a continuous coating of zinc. Galvanising is carried out in accordance with the provisions of BS 729: 1971.

Door and Window Components Material

Galvanised Steel or Colour coated double hinged doors with hasp and staple fixing. Other options available include Roller doors. All door and window components are manufactured from either 16G (1.6mm) or 20G (0.9mm) materials, dependent upon the required level of structural ability. These materials are to an identical specification to that given for cladding sheet materials above.

Gable End Verge Trim Materials

Verge trims are manufactured from 16G (1.6mm) thick "Galvatite" materials to identical specifications as given for cladding sheet materials above. For colour coated buildings they can be covered with a contrasting coloured flashing as an option.

Rooflights

Glass Reinforced Polyester sheets to fit the building profile, available in single or double skins on either or both sides of the ridge. There must be at least two clear tiers between any "broken" tier and at each gable end. This applies to rooflights, ridge vents, windows etc.

Ridge Vents

Reverse Profile Galvanised Steel sheets to same material specification as walls. This provides open profiles on either side of the ridge sheet.

Gable Vents

Perforated Galvanised Steel mesh sheets to the same profile as the walls below the ridge at each gable end. Louvres can also be provided as an alternative.

Insulation

Double steel skin with 80mm fibreglass, giving a "building within a building" or a board based system using fibreglass and plasterboard with a mineral fibre suspended ceiling to suit clients thermal and sound insulation requirements.

Windows

Top hung single glazed sealed uPVC or aluminium units 750 wide x 850 deep or double glazed 28mm thick (4-28-4).

Prefab Foundations/Floor

Pre-drilled galvanised steel channel framework complete with all cleats designed to loading of 3.0 kN/m2 imposed load, 0.19 kN/m2 dead load. Insulated vapour barrier under 18mm tongued & grooved flooring grade chipboard floorboards covered with 2mm heavy duty vinyl sheet.

Other options are available, including electrics, heating, plumbing and sanitary fittings etc.

Performance Data, Dead and imposed loads

V-Span and Flospan buildings have been designed according to calculations by Professor J M Davies of Manchester University, copies of which are available from our Technical Department.

Although there is no British Standard for stressed skin buildings the buildings have been designed to comply fully with the loadings required under BS6399: Part3: 1988 and British Standard Code of Practise CP3 Chapter V Part 1:1975 and Chapter V Part 2:1972 in respect of imposed roof loads other than wind loads.

In 1972 general terms the above standards require a maximum safe applied load of 0.75 kN/m2 inclusive of snow loads, services loads, intermittent access loads and the imposed weight of any lining or insulation system provided that this does not exceed 0.15kN/m2

Flospan buildings have been practically tested to destruction in a series of loading tests under supervision and guidance of British Universities. Both the Flospan A930 and A750 have Local Authority National Type Approval.

Loading data for information:

Performance Data, Wind Loads

Flospan buildings comply fully with the provisions laid down in the following British Standards.

1. British Standard Code of Practice CP3: Chapter V: Part 2: 1972 in respect of imposed wind loads in all directions.
2. British Standard BS 6399: Part 3: 1988 in respect of wind loads.

The wind values and derived pressure coefficients are based upon the probable wind speeds encountered in the British Isles calculated on a statistical basis in accordance with information provided by the British Meteorological Office, and use gust loadings in preference to mean average loads.

Maximum 3 second gust speeds are considered to be wind speeds likely to be exceeded only once in 50 years at 10 metres above ground level on open flat land.

The calculations for the design wind speed have used the following factors:

The pressure exerted upon the building on any of its surfaces have been established by a series of destruction tests and the applied loads resolved vectorially to arrive at the resultant loads on the structure as a whole using the formula F = (Cpe - Cpi).q.A. as laid down by the British Standard

The resultant load is equivalent to a dynamic pressure of 1530 N/m2 on the largest area exposed to wind forces. These figures equate to a safe performance in winds up to the following velocities:

For further information on factors to be used in unusually high wind speed situations and coefficients to be used when the building is not equipped with fully clad walls or ends, please contact our technical department.

All quotations are subject to our terms and conditions of sale, a copy of which is available on request. Please do not hesitate to contact us for further information.

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