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.