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VORNBÄUMEN APPLICATION SELECTING THE DIRECTION OF LAY CALCULATION VARIABLES SELECTING THE DIRECTION OF LAY WINDING FROM BELOW Right-hand lay rope Left-hand lay rope WINDING FROM ABOVE Right-hand lay rope Left-hand lay rope L R L R L R L R CALCULATION VARIABLES FILLING FACTOR (f) The relationship between the sum of the metallic nominal cross sections of all wires in the rope (A) and the area (Au) of the circle circumscribed by the rope with nominal diameter (d). METALLIC CROSS SECTION (A) The product of the factor for the metallic nominal cross section (C) and the square of the rope's nominal diameter. MINIMUM BREAKING FORCE (F min ) A defined value in kN which must not be undershot by the measured breaking force (Fm) in a prescribed breaking force test. It is usually calculated as the product of the square of the nominal diameter (d), the rope grade (Rr) and the break force factor (K). CALCULATED BREAKING FORCE (F e.min ) A defined value in kN which must not be undershot by the breaking force determined in a test. It is usually calculated as the product of the square of the rope diameter (d), the factor for the metallic cross section (C) and the rope grade (Rr). ACTUAL BREAKING FORCE (F m ) The breaking force determined in a test according to a prescribed procedure. CALCULATED LENGTH MASS (M) A value which is calculated as the product of the factor for the calculated length mass (W) and the square of the rope's nominal diameter. f = A Au F min = d² · Rr · K 1.000 F e.min = d² · C · Rr 1.000 A = C · d² M =W · d² See EN 12385-2 See EN 12385-3 TECHNICAL NOTES III