52 INDIAN HIGHW A YS, OCTOBER 2014 AMENDMENT TO IRC:81-1997 Amendment No. 1/IRC:81-1997/August, 2014 T o IRC:81-1997 “Guidelines for Strengthening of Flexible Road Pavements Using Benkelman Beam Defection Techni que” (First Revision) S. No. Clause No. & Page No. For Read 1. 7.5 (Page 20) From structural considerations, the recommended minimum bituminous overlay thickness is 50 mm bituminous macadam with an additional surfacing course of 50 mm DBM or 40 mm bituminous conc rete. From structural considerations, the recommended minimum bituminous overlay thickness is 40 mm. 2. Annexure 1 Calculations S. No. (5) (Page 22) The rebound deection (%) (i.e. co l. 9 of Table 3) shall be the twice of the X T value. Delete the sentence. Errata No. 1/IRC:37-2012/August, 2014 T o IRC:37-2012 “Tentative Guidelines for the Design of Flexible Pavements” S. No. Cl ause No . & Page No. For Read 1. 6.5.2 (Page 16) (Eq. 6.6) A. Fatigue Life in T erms of Sta ndard Axles N = RF (11300/E +191 .0804 t 12 ε A. Fatigue Life in T erms of Standard Axles N = RF (113000/E +191 0.804 t 12 ε ERRATA TO IRC:37-2012
