1100 EVERETT AVE 2016-01-01 MF Import

October 14 , 1969 tdr, G�orge D. Eastman� Jr. Chi�f Adminietrative Aeaistant Gffice of the Meyor City Hell Piping F�ilure Sewage Pu�ping Station Page 2 Tlier• ie no evidence at the wa12 caating or at tkie thruat block to indicate that any uN�e3. aurge, thrust or preasure tind occiarad that caused movem�nt � wt�.tch movement would have baen trenamitted to thia fitting to cause the rupture. The Eitting ie isolated by epecial flexible coupliaga both immedistely ineide and outside the structure which esaures us thet no movement of the atation itaelf through settlement or aettlement of the area adjacent to it cou�huedcaueinn8the�rupture. an extraordinery rorque to this fitting, B At the time °�durin�com Iete�startaupfandyshut-dowen cycles andions in the piping B P fownd no aign of s�sgea occurring or anp sign of Pa�er�ha�er that would be indicative of imdo stressee to the i i s t�m and probable souzce o£ the failure. We carafully noted the condiCion of the piping and thQ aupporta during opar�tion of the pianpa and could detece no abnormel vibration the minimusl amount zhst does occur is normal to tho ineta�lation and well within the atreas ca�bilitq of the materials specified snd uaed . This office did desigxt the etation and did inepect i�e con- etruction and did rim it through coneidarable test cycles befora racou�ending �cceptance of the contract to the City. This etation hse bsan in operation approximately six yeare , this eCation like eome 20 othere in the City had no prior equipment failur�. It is only rea pnabla to aesume that Chie perxicular fitting iyd soma inhe�t weakneae aC the time of ite mnnufecture, but which had aufficient atrength to carry it `.hrough a11 the pre� delivarly teeCin� as well as the on aite instsllation and start-ar tasCing but which through fatigue in tlle metal eventuelly caused tM failur�. There ie a rsre posaibility but highly inprobable thst eome of sa�edbthus caueting�e sCresetwithinntheni•ittiag itself�oNormala-