44 resultados para Underwriters


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Supplemental report also issued, which was filed at the Commissioner's meeting of December 7th, 1921. Titled: Report of the Fire Insurance Committee of the National Convention of Insurance Commissioners, approved and adoped December 7, 1921.

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Includes pamphlets jointly sponsored by the National board of fire underwriters, Underwriters' laboratories, and National fire protection association.

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"This brochure is intended for use with the C.L.U. Study Guide for Part II--M-2."

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"Authorities consulted" at beginning of each volume.

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Each issue covers one city and has distinctive title: Report on the city of ...

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Mode of access: Internet.

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Mode of access: Internet.

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Mode of access: Internet.

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Title Varies: 1912 List of Gas, Oil and Chemical Appliances.-1913-1914, Lsit of Gas, Oil, Mechanical and Chemical Appliances.-1938

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Mode of access: Internet.

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Currently, there is a great search for materials derived from renewable sources. The vegetable fibers as reinforcement for polymer matrixes, has been used as an alternative to replace synthetic fibres, being biodegradable and of low cost. The present work aims to develop a composite material with epoxy resin reinforced with curauá fibre with the addition of alumina trihydrate (aluminum hydroxide, Al(OH)3) as a flame retardant, which was used in proportions of 10 %, 20% and 30% of the total volume of the composite. The curauá fibers have gone through a cleaning process with an alkaline bath of sodium hydroxide (NaOH ), parallelized by hand and cut carding according to the default length . They were molded composites with fibers 30cm. Composites were molded in a Lossy Mold with unidirectional fibres in the proportion of 20% of the total volume of the composite. The composites were prepared in the Chemical Processing Laboratory of the Textile Engineering Department at UFRN. To measure the performance of the material, tests for the resistance to traction and flexion were carried out. with samples that were later analyzed in the Electronic Microscopy Apparatus (SEM ). The composites showed good mechanical properties by the addition of flame retardant and in some cases, leaving the composite more vulnerable to breakage. These mechanical results were analyzed by chi-square statistical test at the 5% significance level to check for possible differences between the composite groups. Flammability testing was conducted based on the standard Underwriters Laboratory 94 and the material showed a satisfactory result taking their average burn rate (mm / min) decreasing with increasing addition of the flame retardant composite.