Page 49 - Building Regulation and Design Guidelines - Structural (Grey Code)
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SECTION: 3  GUIDELINES FOR PRE STRESSED CONCRETE WORKS (SLABS)                       SECTION: 3   GUIDELINES FOR PRE STRESSED CONCRETE WORKS (SLABS)





                                                      P
                                           P      T =  sin0 cos
                                    Y
                                              0        P
                                                   P H  =
                                                yc    tan0
                                                       Z
                                    c.g.

                                      P   T  T  P                                                                          (a)  Four Points With Two Cranes
                                    Y
                                          P V  P V
                                 e
                                                      y t  y c
                                                    y     X
                                        c.g.        b
                                         M x =  P H y c
                                             P yc
                                         M x =
                                             tan0
                                         M z =  P e
                                             v
                                             P e
                                         M z =
                                            tan0
                              Fig. (3.14c)  Moment caused by eccentric lifting
                                                                                                                            (b)  Eight Points with two Cranes
                                                                                                                                   and Two Spreader Beams
                                                                                                                             Fig. (3.14e)  Hook lifting
                                                          Spreader
                                                          Beam

                                                          Rolling
                                          c.g.
                                                          Block
                                                          Force Equal
                                      Equal  Equal        on All Lines








                                                          All Reactions                                    a) Four points with Spreader Beam  b) Eight Points with Spreader Beam
                                                          Equal
                               R      R       R       R
                                                                                                                        Fig. (3.14f)  Use of spreader beam
                            Fig. (3.14d)  Arrangement for equalizing lifting loads


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