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r <br />i:r. i,�;llr:.hr�n - September 20 Y�-.�e 4 <br />not be s problem. �l�-3 is .- sketch on �anich dimensions and �veld � <br />c<.11-outs for the ,�o, d bars involved �:.re not shoi•:n ��.nd these <br />=.ssemblies �:ere inst�:lled on .: conform=.nce to past per`'crm�nce <br />b�sis ruther than on the basis of a design dr�:�ving. lreportea thi� <br />install=.i;ion in my report of .,ugust 28, but l feel personelly some- <br />wh�:t reruiss in not c�.11ing your o£fice �.nd discussi.ng this inst� ll tion <br />on th==.t d_:te. 1 should -:lso point out that the �=.ssemblies on Li�e <br />fi and at 12-.; r,•ere pref�.bric:�.ted by the Contractor, presum�_bly <br />using the s-me substandard procedures i h�.ve described pre•✓iou:,ly. <br />��o. 3 bend-out�, 4�' long, �:t 2' UC were specified on both sides of '. <br />the pa.nels on Line H. _hese �:�ere omit;;ed completely in the Iine <br />t. p�=nels in the lotiier level �nd dowels were in�t��.11ed on one side <br />of 4 of the 6 p�-nels on the upper level. �'he 4�Z' Uendouts e:ould <br />obviously require e.t le_:st u 4�' wide pour strip for proper embed- <br />ment, but the �ontractor provided only .a 12" pour strip on ooth sides <br />at both �evels. in going over this item �•rith P:r. Smith, he st>ted <br />th•4t dowels were essenti�.l .n the er,terior line p> nels becs:use <br />the sl.:b only bounded them on one side, but th�it they �aere really not <br />needed in the iine ii pe;nels bec�.use the slab boun:iec: them on both sides. <br />,�uite i'raril:ly, 1 iind it difficult to agree �:ith this �nswer since <br />it appe�rs to ignore the fact th2t the exterior p�nels extend below <br />the slab �nd are buried for sever:l feet in comp<.ctea soi1, which <br />i�-ssume must provide some stability for their base. �he p�.nels <br />on Line H rest on box footings eit the bz.se of slab level. 1 am <br />:lso unaUle to understand why, if this is the case, that the Lnginee.r's <br />design should include more dowel steel in the area where it i� <br />least required. Gn the exterior panels 2' long dov�ely at'2' UC lti <br />4' lon dowels ut 4 UC p <br />� ' , khereas on Line ii dh� riowels are sp.�ced 2' GC. <br />..ngineer dmitn considered the 1',_"' pour strip ;dequate e.nd 1 believe <br />no remedi<.l ��ction is planned for this item. <br />t is not m;� .function to ouestion the aesign of this buildin< <�nd 1 �o <br />not prop se to �o so. lt is m�� respon�ibility �o c�:ll your r.ttention tio <br />iiems w}:ich f�=.i1 to meet the ori�.;iiial desirn and there is obviously <br />an appreciable difference in oesign in the ;anchor=€e of these panels <br />bet�veen � 12" pour strip with no do���els and a Qz -5� pour strip <br />wi th dowels � t 2' UC. 'r,hil e i t is impractical for the Contractor <br />to Ure_.k out the sl<.b, it is not impractical for him to drill holes <br />in the panels and in the sl;_b and insert � fe�•: l�.rge size hook be.rs <br />from Uoth directions in lieu of the large riumber ui ; bars, either <br />epoxied or grouted in oversize holes. <br />1 feel sure th�t your origin:.l Upprov��.l of the designs oi thi� <br />builriing t��ere br sed on technice.11y compet�.it _�eviews. i ���ould <br />recommend that your 4cceptance of uesign ch��nges in +hose pl.�ns be <br />bc�sed on equa.11y cereful �:nd technic�lly competent revieias. Iiopefully, <br />the items 1 h�ve covered in thie letter +�ill prove helpful in irienti- <br />fyin� some of the i_ctors involved. <br />�incerely, <br />���� ��� !�� <br />seC �;e n. .:mery i%� <br />� <br />