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Sheathing is corrugated in length & manufactured out of C.R.C.A.strip of various dia.from 39 ,51,75,90,105,110...150,200 mm and are available in both Bright metal / Galvanised finish as per IRC 18-2000 ,& IRC 112-2011 specifications. FRICTION LOSES VALUES recommended to be used in design, Bright metal - Wobble coefficient ( k ) per meter 0.0046 & Friction coefficient 0.25 Galvanised metal - Wobble coefficient ( k ) per meter 0.0030 & Friction coefficient 0.20 |
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