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SECTION  3  GUIDELINES FOR PRE STRESSED CONCRETE WORKS (SLABS)              SECTION: 3   GUIDELINES FOR PRE STRESSED CONCRETE WORKS (SLABS)







               3.1   GENERAL                                                                         3.2   PRE STRESSED CONCRETE SYSTEMS
                     The current pre stressed guidelines is relevant to the post tensioning bonded         Pre stressed concrete specialist contractor shall have qualified international
                     systems only, Fig. (3.1), other pre stressed systems shall be submitted to CED –      recognized pre stressing system to perform in accordance with its materials and
                     Trakhees for review and approval prior to commence any related work.                  technical requirements.
                                        Vent pipe                    Vent pipe                             The specialist contractor shall have exclusive agency agreement with the system
                        Formed sleeve                 Bulb                                                 provider including supplying the local specialist with materials, all necessary
                                Oblong sleeye pipe           Oblong sleeve pipe
                                    Mastic                       Mastic  Flat duct                         technical support, and skilled manpower wherever is needed.
                                             Flat duct
                                                                                                           This agreement shall be registered and approved from relevant statutory
                      100
                                                                                                           authority as appropriate and shall be yearly renewed, or confirmed by letter from
                                                                                                           mother system agency if the period of agreement is more than one year.
                                300/300/400w                950                                           3.2.1   MATERIALS
                              Steel Plate
                                                                                                                a.   Anchorage system, Fig. (3.2).
                                                                                                                    Specialist  contractor shall submit initially certificate of origin,
                      L1                                                                                            material catalogue and full sample supported with technical data
                                                                                                                    sheet, if necessary, with no more than one year old.
                                           80                         80
                                      55  55  55  55            55  55  55  55
                                        260                        260










                                                                                                                              Fig (3.2) Anchorage system



                                                                                                                b.   Pre stressed concrete equipment:
                                                                                                                    Specialist contractor shall submit the technical data for pre
                                                                                                                    stressing equipment which will be used in the works. Jacks,
                                                                                                                    hydraulic pumps, dead end machine, grouting machine, and duct
                                                                                                                    machine (If applicable), Fig. (3.3).
                                    Fig (3.1): Pre stress bonded system                                             The submission should include the calibration test for the jacks.
                                                                                                                    Hydraulic jacks calibration should be submitted for each project,
                                                                                                                    the calibration should be dated not more than 6 months prior to
                                                                                                                    submission date.


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