electrical pcc pole breaking test

From narrow side of PCC (pre-stressed cement concrete)pole we called pole top side for pole breaking test we give load on its top side & down side fixed possessed by a vice .On top side we loaded as 200kg..250kg..300kg..350kg...400kg..425kg..450kg...475kg....500kg like this if till 500kg load pressure the pole bearded then the pole is ok & all the pole manufacture on that day will be worked in electrical installation otherwise fell & rejected all.