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The Perfect Shelter

v i s a k a . o r g
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Fibre Cement Sheet ...

Visaka's high-tech Fibre Cement plant is a fully automated factory incorporating the latest and most sophisticated technology. Resulting in consistency in physical properties and strenght, which far exceeds the standards prescribed by I.S.I
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Dimensional Details ...

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ISI SPECIFICATION TECHNICAL DATA

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Standard lengths
(in Metres)		 3.00, 2.75, 2.50, 2.25,
2.00 1.75, 1.50		 Tolerance (in mm)
+5
+10		 Maximum unsupported
overhang
Maximum purlin Spacing for roofing		 300 mm
1.4 M
Thickness 6 mm +Free
-0.5		 Maximum rail spacing for Vertical cladding 1.7 M
Pitch 146 mm +6
-2		 Section modulus ZB : 75 cm3
Depth 48 mm +3
-5		 ZT : 85 cm3
Overall Width 1050 mm +10
-5		 Moment of Rupture 200 kg/cm2
Effective Width 1010 mm +10
-5		 Running Metres per tonne (approx) 78
Minimum End lap
(for slopes 18o and above		 150 mm Colour Grey
Symbol VCS/3, 2.75 etc.
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ECONOMICAL SIZING & ESTIMATING FOR VISAKA CORRUGATED SHEETS & ACCESSORIES.

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SIZING
a) For Roof
1) Let us assume the slope lenght is L metre.

2) To cover this length, minimum number of sheets required N
    Where N=L-0.200/2.8 (a whole number).

3) Maximum sheet length required is P
    Where M= (N-1) x 0.200.

4) Maximum sheet length required is P
   Where P = L +  M => L + (N-1) x 0.200 (rounded off to next digit divisible by 0.25).

5) Once P is obtained, sizing should be done keeping the  number of sheets at N.

6) check if the slope can be covered by (P - 0.25).

7) Check that the number of purlins does not exceed - K
    Where k= L - ( a1 + a2) / 1.40 + 1 (a whole number)
    Where a1 = distance between the eaves purling and the eaves edge in - Metre.
     Where A2 = distance between the eaves purling and the eaves edge in - Metre.
b) For Wall Cladding
Most economical length is 1.75 M. which allows a Rail spacing of 1.6 M..
ESTIMATING
For both Roof & Wall Cladding. Number of sheets in a particular row
N = L - 0.04 / 1.01 (a whole number)
Where L = Length of the shed in Metre..
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RECOMMENDED WORK PRACTICES DURING INSTALLATION

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1. To keep dust levels down, cutting and drilling operations must be carried out in the open, or in well-ventilated areas.

2. Use hand-operated tools such as drills, hand-saws; etc.

3) Use of pneumatic/electric power tools and abrasive discs is not recommended.

4) Any waste created during working operation should be collected after damping, in impervious bags and buried underground.
CAUTION: Asbestos Cement products present no known risk to health as they contain only a small percentage of asbestos firmly 'Locked in' with cement during manufacture. Follow recommended work pratices during installation to avoid emission of dust. Inhaling of asbestos dust in excessive amounts over a prolonged period can be injurious to health.

Visaka Industries Limited