design considerations for aluminum hull structures - Ship Structure ...

-128-~gE1+0102030- .. ..—405060 —2 1TIII1-+———“.,—-.—6—.-. .—..——1——1—— —\—— . ..——,5.--— —— —..— ..-———\---—.. -iJL1 1TEMPERATURE(DEG~SFAHRENHEIT)- HUNDmOSFIG. C-1 Standard Time - TemperatureCurve for Fire Testsboard tests in 1936 (Reference (c2)). A stateroom was loaded with 5 poundsof combustibles per square foot of area. The resulting fire was found to beof a severity equal to that represented by the standard curve. All thelater tests conducted at this time were compared to the standard curve andthe comparative value of the exposure approximated. Thus, the comparativefire resistance of the various materials and constructionswere evaluated.5* ~ this method the U. S. Coast Guard, in conjunction with theNational Eureau of Standards have developed constructions utilizing approvedmaterials for steel ships based on a time-temperaturerating, Reference (C3).Some subsequent tests for aluminum have been conducted, again using thismethod of evaluation, (References (C4) and (CS)). This is also the basisof the tests being conducted under the auspices of the Society of NavalArchitects and Marine Engineers and the U. S. Coast Guard.