Palram SUNLIT - Manual (Page 15)

SUNLITE® Technical Guide
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General Notes for Structural Design
1. The recommended support spacing, as specified in the load/span tables, should not supersede the requirements of local structural
and construction codes. The final values are to be dictated by actual conditions on site and engineering design.
2. The end spans, i.e. the distance between the edge support (or purlin) and the first internal purlin should be up to 80 percent of the
commonly recommended span for this load and type of sheet, or the value dictated by the design engineer.
Positioning of Clamping Profiles and Fastener Location
1. Using the four-sided clamped glazing system, the support bars should be underneath (or inside), and the glazing clamps on top (or
outside). SUNLITE must be installed with the clamping profiles covering all four edges of the sheet. (These are load-bearing elements,
which connect the glazing to the supporting structure, transferring loads from the glazing to it.)
2. Using the two-sided clamped glazing system, the support bars (and glazing clamps) should be installed covering the two longitudinal
edges of the sheet, parallel to the rib channels. (Again, these are load-bearing elements, connecting the glazing to the supporting
structure, transferring loads from the glazing to it.)
3. Using the roofing/cladding method, glazing connectors (of any version) should be installed on both long sides of each sheet (parallel
to the rib channels). Their main duty is connecting adjoining sheets. They may assist transferring loads to the structure, but here the
fastening screws transfer most of the load to the supporting structure (the purlins). The screws, with their metal washer and rubber
gaskets, should be inserted along the length of the supporting purlins, about 500-600 mm (20-24 in.) apart and 300-400 mm (12-16
in.) at the edge purlin. When using metal glazing connectors, they are positively fastened to the purlins.
When using polycarbonate connecting-profiles, some types are fastened and others do not. In that case, the fastening screws will be
placed on both sides of the connector, about 200-250 mm (8-10 in.) on each side.
SUNLITE glazing
Supporting arched structure
Connecting profiles fastened to purlins
Supporting purlins
Figure 15
Schematic description of standard
curved roofing in a vault
.