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F III 'I9.3 h&mYllall.9.3.1 The thickness of a load bearing d 1 shall be sufficient at all points toensure that the stresses due ts worst conditions of loadin are withinI the limits prescribed for that rticular type of wali. e thicknksP"dused for design calculations sha 1 be the actual thickness of the masonry,not the nominal thickness. See Fig. 9. In masonry with raked joints,~'Ithe thickness shall be reduced by the depth of the raking out. See Fig 10.9J.2 However, if joints are raked to provide key for subsequent plaraking could be ignored. tf any face of a wdl is to be pointedesirable to do rnkin and pointing while the mortar is green toany loss of strength 'f ue to raking. For solid walls adequately binto piers or buttresses at intervals, the effective thickness shallactual thickness of solid wall multiplied by the appropriate stiffenincoeffici~nt iven in table 5 given below. For cavity walls, the c!rectivthickness s II be two-thirds of the sum of the actual thickness of thtwo leaves 8, El4 "STWFENNG COEFFICm FOR WALLS -'BYTMBSES/QR INTERSECTING WALLS. I' !,-.I. I. rd BUT-Ratio, - spIFFENING CQEFFIGIENT'p 'R 3 pr moreWP . -wmwm&rfsc w ,6 1 .O 1.4 .--**8 1 .O 1.3 - 1.7I0 1 .o 1.2 s.! 4 1.415 1 .O 1.1 1.220 or more 1 .O 1 .O 1 .OWheresp - centre to centre spacing of the pier or intersecting walltp = the thickness of piertw = eual thickness ofrwall oper; andwp = wldth of the pier in the i~ction of the wall or tk'e actuaI thickness of theintersectrng wall., Note:--' Linear interpolation between the values given In M a tabk is permissiblebut nat extrapolation outside rhe limit givec.In case of veneered walls, veneer shall not be ms;dered to be part ofthe wall when computing the strength or required thickness of thewall.-r10. f The gemiis~ible sive sir'&%% masonry depends upon the foHawingfactors:(a) Strength of masonry unitsb i