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' May, 16, 2002 10; 2fiAM BRAUN INTERTEG CORP No. 3677 P. 3/4 <br /> Mr. David Dalvcy <br /> F�roject BADX-U1-11U9 <br /> May 14, 2002 <br /> Pagc 2 <br /> hlasonry Foundation Wall E�v�luation Report <br /> I�2U Bohns Point� Orono,Minnesuta <br /> Uurin�;CUnvt;r�3i�vns wi'-fti `Vir. Daiv�v, ic w�s indicated d�at concuris were raised aboac ihe stone <br /> masu��ry wal► coustrucu� ,�,�:�IaFade to:detached�ara�c and ihe con�rete masonry used in the <br /> founda�►on�v�alf uf tl�c i�ous::. Tt,csc cunccn+s wcrc rocuscd around thc potcn�ial for frozcn mortar and <br /> d�e appareiu loose�y Lorided sconc i��asotin� I�is our understanding ihat tl�e masonry wds placc:d in <br /> Ucc�mbu� 2UU 1 and lanu:irv lUi�2. <br /> Detacl�ed Gararc 5to»c Mnsonrv Ffl�adc <br /> Uurin�our sitc obc�r�,ai,�c�ns, ih�purtions of tl��stonc masonry�vall thx�wcro of conccirn�app�:arcd io <br /> have bcen dun�li�f,ce'..�nd rebu�lelina,ot'thc u-all h�d commenced. Several u�uu of stone were <br /> dislodgcd b�� L;r<�n;i Inicrtcc u�,d tl�,;Vhumwwncr du��ng uur visit. M�rtar samplcs wcrc rctriev��d from <br /> titic cast elc;v:�liori ai,c'1 dcl,ri� p�lcs Tl�c�:�st cic�auoo coniai„cd ooly 3 to� courscs of masonry at thc <br /> time of our vtsit �cv�;rcu ot Ihcsc m��rtar sttmplcs frona bo[h thc dcbns p�lc�nd w�tll,wcre nolcd to <br /> cOniBm froSt c')s'ia! �ui�).Css:on- <br /> lt is uncl�ar m whai��t�nd �h�u�ortar in thc�tiall was frozcn sincc demolition and repair had already <br /> commence�l. Thc rLmain�ug walls dicl not appe�r to be affectcd by freezmg temperature. S�me areas <br /> oftl�e remainin� i�ayl v.ere alrcad� it►ck-pointe;d in small areas. <br /> On thc norlh cic��lion_ ;rlsstt:rs w�rc b�m��conslructcd surrounding stu:l colunuu that support an ovcr <br /> h�v�g abov� �hc;�aral�c ci�or5 Ti��mu�t�vcslcm piltu[cr was partially constructcd with a protruding <br /> stone from the �+all a�proxi:nalcly �-l%L fcet from the ground. 7`his slone was loose and itnbonded <br /> Itnql L}1C SUl7plllIillqP ,naso�zr�. <br /> AL f�7�f1111C:UI JUC SUC v)j��. )� ;lO�C:1fC(� LI1Fll [�lC Il1il�UflCy Of lI]C fC�7:llf5 W [31C w1����crc alrcady <br /> undc:nvay. fh� rc��i�uuin�� w:<Ils d�d noi appear to ne;e:d fi�nl�er a<<emion at this time, with the e:xception <br /> of che iouu:lv boo�cti ;tcmc�n thc ►v�s�cicvation. <br /> Nuuse Fuundati��n 'v�':�li <br /> Durin�our sit� v;sit. t��os,ci7�stal unpressions u�crc obscivcd m many locations of the masonry wall. <br /> T}►ccc trost cr�•stal unE,ress�ons l:� us to bclieve:that at some poi�it i�i time the mortar had frozen,at <br /> least superticially G� is �ur undeistanding tha�as soon as di�first floor devation was inscalled, a <br /> h��atcr was pfaccd :n�I�c bas��l�cn1 and[h� LcmpCr�turC�-as hcld abovc frccr.ing from that point on. <br /> Thc tnurfar ap��c:ar�cl :u b��v�ll i�ondcd to the masonry un�ts ��d was judged to bc relatively liard when <br /> scratchet] witl� a rneta! ob�cci tiomr isol�icd minor areas of the niortar joints, typically in the l�ead <br /> JUIiIIJ,(�C�DU115if':ICCI� �O�Iti�;SU�T�t7l�FjZf. <br />