RB-19                                          RB-20                                               RB-21
FOR DEAD LOAD                                      FOR DEAD LOAD                                    FOR DEAD LOAD
                                  W RS-1 TRI                                      W RS-7 TRI                                         W RS-2 TRI
                                  W RS-6 TRAP                                     W RS-4 TRI                                         W RS-8 TRAP
                                  W self weight                                   W self weight                                      W self weight
                        4.5 m                                           4m                                                 5.5 m
                          W19                                           W 20                                                 W 21
                        4.5 m                                           4m                                                 5.5 m
FOR DEAD LOAD                                      FOR DEAD LOAD                                    FOR DEAD LOAD
     Ps/6                  m2           WEIGHT                  Ps/3                     WEIGHT         Ps/6                  m2           WEIGHT
     3.231                0.790            7.139               6.641                        6.641       3.231                0.529            7.983
                Ps/3                    WEIGHT                  Ps/3                     WEIGHT                    Ps/3                    WEIGHT
                7.269                    7.269                 6.641                      6.641                    8.884                    8.884
             SELFWEIGHT                 WEIGHT             SELFWEIGHT                    WEIGHT                 SELFWEIGHT                 WEIGHT
  250mm X 125 mm X 23.60 kN/m3             0.738     200mm X 100mm X 23.6 kN/m3            0.472      275mm X 150mm X 23.6 kN/m3             0.974
         TOTAL WEIGHT                     15.146          TOTAL WEIGHT                    13.754            TOTAL WEIGHT                     17.841