Main reasons for cracking of the main bridge railings

First, the construction unit in the railing the relevant provisions of the construction process, failure to require construction;,Secondly, supervision unit has not conscientiously perform their supervisory duties, not strict; design units of the bridge railing design considerations are not thin, not deep enough; Thirdly, However, by the on-site inspection, bridges, the main structure intact, no safety problems, is currently operating normally. End of next month all the new ones, granite railings remain unchanged.