ISI Specification
ISI SPECIFICATION TECHNICAL DATA |
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Standard lengths in (Metres) |
3.00, 2.75, 2.25, 2.00, 1.75, 1.50 |
Tolerance (in mm) |
Maximum unsupported overhang |
300 mm |
Thickness |
6 mm |
Maximum Purlin Spacing for roofing |
1.4 M |
|
Pitch |
146 mm |
Maximum Rail spacing for Vertical cladding |
1.7 M |
|
Depth |
48 mm |
Section modulus |
ZB: 75 cm3 ZT: 85 cm3 |
|
Overall Width |
1050 mm |
Moment of Rupture |
200 kg/cm2 |
|
Effective Width |
1010 mm |
Running Metres per tonne |
78 (approx) |
|
Minimum End lap |
150 mm (for slopes 180 and above) |
Colour |
Light Grey |
For Roof:
For Wall Cladding : Most economical length is 1.75 M, which allows a rail spacing of 1.6 M.
For both roof and wall cladding, the number of sheets in a particular row N = L - 0.04 / 1.01 (a whole number); where L = length of the shed in metres.