And roof decking as

The part of the envelope, on the roof, which supports insulation and waterproofing plus its own weight, plus imposed loads resulting from snow, wind, maintenance and sometimes access. The steel sheet usually forms the inner layer and is not exposed to the elements, unlike roof cladding.

Profiled steel and aluminium sheets are available in sinusoidal, symmetrical and asymmetrical trapezoidal profiles. According to the PSA Method of Building Guide (I 979), these can be defined (Fig. 5.13) as:

- sinusoidal - where crests and troughs are symmetrical and have the shape of a sine curve;

Nut with spring

-Neoprene gasket should allow for any lack of alignment of 'Unistruf

Holokrome M12

Cladding panel recessed socket button head bolt with s/s lockwasher, S/S washer amd black neoprene washer 3 mm thick

S.IO Detail of panels at Herman Miller; Bath.

Nut with spring

-Neoprene gasket should allow for any lack of alignment of 'Unistruf

Holokrome M12

S.IO Detail of panels at Herman Miller; Bath.

Cladding panel recessed socket button head bolt with s/s lockwasher, S/S washer amd black neoprene washer 3 mm thick

w\ ; 14 1

1

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fc , I; . 1 t

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S.I I Deep drawing of complex sections and trays.

S.I I Deep drawing of complex sections and trays.

5.12 Panels by Superform Aluminium at Financial Times building.

- symmetrical trapezoidal - where crests and troughs are the same width, and the sloping sections are at a constant angle;

- asymmetrical trapezoidal - where crests and troughs are unequal in width. The section can be used with either surface outside provided the organic coating is on the correct side.

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