Vishakha Fibre Cement BoardSolutions
Visaka’s priority is quality and strength. Therefore, it prides itself on excellence, superior technology, and most of all, the professional expertise that goes into making its products. Visaka’s products are undisputed recipients of appreciation for their affordability and durability. Visaka’s state-of-the-art Fibre Cement plant is a fully automated factory that incorporates new-age, sophisticated technology, ensuring consistency in physical properties and strength that surpasses the ISI standards.
ECONOMICAL SIZING & ESTIMATING FOR VISAKA CORRUGATED SHEETS & ACCESSORIES
Sizing For Roof:
- Let us assume the slope length is L metres
- To cover this length, a minimum of N number of sheets are; where N = L – 0.200/2.8 (a whole number)
- Maximum lap loss is M metre Where M = (N-1) x 0.200
- 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)
- Once P is obtained, sizing should be done keeping the number of sheets at N
- Check if the slope can be covered by (P – 0.25)
- 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.
For Wall Cladding :
Most economical length is 1.75 M, which allows a rail spacing of 1.6 M.
ISI SPECIFICATION TECHNICAL DATA | ||||
| Standard lengths in (Metres) | 3.00, 2.75, 2.25, 2.00, 1.75, 1.50 | Tolerance (in mm) +5 -10 +Free -0.5 +6 -2 +3 -5 +10 -5 +10 -5 | 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 | |