... hợpM(Tm)N(T)NMeo/ 1 =(m) 01 eeeoo′+=(m)dhM(Tm)dhN(T) 1 23 II- 13 II- 17 II- 18 1, 28 -1 0,798 -1 0,6658,8458,8465 ,15 80,0 218 0 ,18 820 ,17 750,03680,2 016 0 ,17 860 ,15 50 ,15 50 ,15 558,8458,8458,84 - ... tiết diện coọt:TmMI053 ,11 23 .19 38,0=ì= TmM II 4 51, 012 3 ,14 02,0=ì=TmMMIIIII4 51, 0==TmMIV69, 012 3 ,16 14,0=ì= TPNNNNmIVIIIIII02,7 1 ===== TQIV 16 3, 012 3 ,11 45,0=ì=*. Xeựt lửùc 2mP ... TmHRMMtIII206 ,17 ,3072 ,17 6,2.=ì+=+= TmHRaeGMttmIII 315 ,47,3072 ,1) 1.005.0.( 21, 55.).( 1 =ì++=++= TmHRaeGMtmIV 18 9,37 ,10 072 ,1) 1.005.0.( 21, 55.).( 1 =ì++=++= TGNNNNmIVIIIIII 21, 55 1 =====...