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�, �^ � <br /> � <br /> TECHNICAL/GENERAI INFORMATION LETTER TD-163(A] <br /> wy 27, 1981 <br /> Page 2 <br /> Our current and future Itterature wtll only Ifst the 45 mtnute ffre rating for <br /> . windav assdnDltes. To say that VISTABRIIVA solTd glass brick has a 1-1/2 hour <br /> rattn9 in a masonry wsll ts incorrect. During the fira test at Ohlo Stat� <br /> Untvarstty, the thermocouples maasurtng tha unaxposed surface temparatur� w�ra <br /> ramoved 45 minutes tnto tha test. The averaga unexposed surface temperatura <br /> w�s 265'F with one thermocoupin recording 361'F. Thls alone would canatitute <br /> a failura of tha wail system, masonry included. <br /> The test report from 'OSU t� available. The potnt to stress from the report is <br /> that th� VISTABRIWD soltd glass brick did not melt through nor did it allow <br /> p�ssage of w�tar during the hosa stream tsat. , <br /> Cl�ss Slock wtll •g�i� bs ltstad tn the U.L. Buildiny Matertals Direetory <br /> Supplament, July, 1981 , and then tn the regular tssu� In January, 1982• Th(s <br /> Iisting, R2556, is for ,tha q5 mtnuta fire ratfng for wtndow assanblTes. <br /> Nhar� a ona-hour rating is desired, the approprtate eode represantativ� should <br /> b• contactad by tha architect and a variance to the eode requested. Stress tha <br /> net��c that all noncombuatfbla matertals aro used, i .e., glass,� mortar, •teel <br /> retnforcement, atc. Suggest the use of aprinklers on both stdes of th� Gl�ss <br /> llock p�n�l . <br /> � <br /> I hopa that this letter clears up the questfon of fire ratings for Glass Block. <br /> Sincaraly, <br /> � <br /> ��j�t_,r:( /'•'� <br /> F. Joseph 2avada <br /> Techntcal Systems Engineer <br /> FJZ:dh <br /> cc: J. Baldwfn <br /> J. Larr <br /> J. Coleman <br /> R. DeGusipe <br /> W. 0. Johnston <br /> N. Loomis <br /> R. McMarlin <br /> G. Meyer <br /> C. Olm <br /> T. Pirosko <br /> C. Smolenskt <br /> / <br /> 1 <br />