distance from ground zere which would provide the desired degree of damage. Target structures consisted of a suction of a mamfacturine tme building with long spans (such as might be used in the manufacture of aircraft), one manuracturines type with short spans, and two residential type brick buildings of European type construction, Thore were in addition six simplificd structurcs with virious sised window openings to obbain basic information coneerming the efrect of openings on etpuctural rosponse to th: blast. There was a one-quarter scale sodel of one of these structures and als: a one-quarber seale vodel of the aircrary oonukeeturing type building. The purpose of these models was to obtain a couparison of the belavior of fseomebrically scaled Such invormation might permit a saving in the cost of models and their prototypes. structure toasts if the relationship of scaled models and protetsne structures can he firnly established, is concerned. The results of the Air force testis were mixod insofar as damege It is expeeted that analysis of data on transiont effects will provide very useful information on methods of predicting teargch danage,. a Ds CIVIL DaPRSi THOT The Pedeoral Civil Defense Administyation sponsored and supported financially the program to determine the effect of blast om windows, veloped by the Public Building Service, Plans for tho test were de+ The oojoective wos to test various types of glass and glass substitutes, and windows of the type caployed in offices and homes, Thore were also tests of methods of stopping flying plass by use of wire mosh, curtains and venetian blinds, The damage achieved in the wincuews and glazing test was well bracketed between extremes of compLote anc no damagc, A satisfactory best was accomplished and mich useful data will be provided, bs CONDUCT OF TESTS The analysis of tne builichugs and prediebian of dausee was accomplished by the Army, Navy and Air Force, The requiremontie for transLont measurements and mo~ tion picture photorsraphy were cstablishud in collaboration with bhe Sandia Corpora+ tion and Edreerton, Germeshausen and Gricr. Extensive measurcments of the condition of structurcs before and after the tests and damage surveys were accomplished by SHNONsoring arencies and vaLth the pransiont data furnished by the Sandia Corporation will be used in making complete analysis and ronorts, Te INSTRURENTATTON a. The important responsibility for measuring pressures on the buildings and for measuring the structural response of the buildings was assumed by Lhe Sandia vorporation in accordance with ayrreements centered into by the Atomic Enersyv Comission fe tak ge OE ght glia Pahari) hte oT atau