CWE/927/2017 Current World Environment 0973-4929 2320-8031 Enviro Research Publishers CWE--50-00 评价胶结的耐火材料in Steel Structures using UL 263 International Standards 2 , Civil Engineering Department, Islamic Azad University (IAU), West Tehran Branch, Iran. - 10.12944/CWE.11.Special-Issue1.06 Volume 11 Volume 11 39-44 Abstract

Considering the fact that constructional steel loses half of its thermal resistance under a certain temperature of a range of 550-550 C, therefore, as per UL 263 and ASTM-E119 international standards, the thickness of spraying fireproof substance shall be made for all the sections to strengthen the structure. Whereas using these standards as per the structures used in Iran is subject to various opinions among engineers, here it has been tried that a certain part of these relations in proportion to the structures used in Iran shall be examined theoretically and practically.

 Keywords Constructional Steel Spraying Fireproof Substance Thermal Resistance