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+// A Texbook on POWER SYSTEM ENGINEERING
+// A.Chakrabarti, M.L.Soni, P.V.Gupta, U.S.Bhatnagar
+// DHANPAT RAI & Co.
+// SECOND EDITION 
+
+// PART II : TRANSMISSION AND DISTRIBUTION
+// CHAPTER 5: MECHANICAL DESIGN OF OVERHEAD LINES
+
+// EXAMPLE : 5.3 :
+// Page number 198-199
+clear ; clc ; close ; // Clear the work space and console
+
+// Given data
+a = 2.5             // Cross-sectional area(sq.cm)
+L = 250.0           // Span(m)
+w_c = 1.8           // Weight of conductor(kg/m)
+u = 8000.0          // Ultimate strength(kg/cm^2)
+wind = 40.0         // Wind load(kg/cm^2)
+s = 3.0             // Factor of safety
+
+// Calculations
+d = (4.0*a/%pi)**0.5           // Diameter(cm)
+T = u*a/s                      // Allowable max tension(kg)
+w_w = wind*d/100.0             // Horizontal wind force(kg)
+w_r = (w_c**2+w_w**2)**0.5     // Resultant force(kg/m)
+S = w_r*L**2/(8*T)             // Slant sag(m)
+vertical_sag = S*(w_c/w_r)     // Vertical sag(m)
+
+// Results
+disp("PART II - EXAMPLE : 5.3 : SOLUTION :-")
+printf("\nVertical sag = %.3f metres", vertical_sag)