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Technical information
Hi-Point technical information
Hi-Point can be divided into two categories termed as
‘primary’ and ‘secondary’ frame. The primary frame is classed
as the module structure and the secondary frame includes the
purlins to roof coverings.
The primary frame is manufactured from cold rolled,
lightweight galvanised steel sections in the form of lipped and
open channels. The cold rolled sections are dimensionally
accurate, extremely robust, non-combustible and can be
installed very quickly.
Roof coverings may be either single or double skin and the
type of roof construction will depend on the U-value and any
other client requirements. Hi-Point offers a variety of coverings
including self-supporting and fully supported standing seam,
composite panels, membrane, trapezoidal profiles, metal tiles
and roof preparation for concrete tiles.
Table 1 Typical pitch requirements
Mono-pitch Duo-pitch Barrel vault
Roof
covering Warm Cold Warm Cold Warm Cold
Kalzip 1.5° 1.5° 1.5° 1.5°
Traditional metals
5° 5° 5° 5°
Superdeck membrane roof
0.5° X 0.5° X X X
Trapezoidal 5° 5° 5° 5°
Metal tile 15° 15° 15° 15° X X
Concrete tile 22.5° 22.5° 22.5° 22.5° X X
Table 2 Principles of dead load structure
Table 1 shows the typical pitch requirements of the above
mentioned roof coverings.
Dead load structure
The dead weight structure design accommodates both live
and dead loads, which may be uniformly distributed or
concentrated at various locations.
Live loads are non-permanent such as environmental loads
produced by snow and wind. The weight of the temporary
construction materials and occupant floor loads can be
classed as live loads.
Dead loads are the weight of the materials in the structure
itself and any items permanently placed on to it.
The primary frames transmit a series of point loads via the
vertical members onto the load bearing structure below the
frame, as table 2.
Table 3 Design parameters
Load bearing structure
Design parameters - module
Type
of roof Condition Span (m) Angle (°) Height Ht (m)
4.0 30 3.2
Mono-pitch Off-site X