A collaborative government-industry research programme was carried out at the National Research Council Canada to develop new sound-transmission classes and fire-resistance ratings for wood-frame floor assemblies protected by gypsum-board ceilings. Forintek Canada Corp., the Canadian Wood Council, and five manufacturers of wood I-joists participated in the programme on behalf of the wood industry. Fire-resistance ratings developed through the research programme range from 30 min to 1 h: sound-transmission classes range from 20 to 65. Many of the ratings will be published in the next edition of the National Building Code of Canada. This paper highlights some of those sound-transmission class and fire-resistance ratings and describes how they were derived from data obtained through the research programme.
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机译：加拿大国家研究委员会（National Research Council Canada）实施了一项政府与行业的合作研究计划，以开发新的传声等级和耐火等级，以保护由石膏板天花板保护的木地板组件。 Forintek Canada Corp.，加拿大木材委员会以及五家木材I型托梁制造商代表木材行业参加了该计划。通过研究计划制定的耐火等级为30分钟至1小时：传声等级为20至65。许多等级将在下一版的《加拿大国家建筑规范》中发布。本文重点介绍了某些声音传输等级和耐火等级，并描述了它们是如何通过研究计划获得的数据得出的。
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