在经过防火测试的墙壁或地板组件上添加绝缘材料

The general rule of thumb when using an assembly that wasn’t tested with insulation is that it’s ok to add it for walls but an additional ceiling layer of gypsum is required when adding it to floor/roof assemblies. 下面是支持这一点的几个参考资料.

为墙体组件添加绝缘材料

第六节，墙和隔板 UL目录的设计信息部分 声明如下:

2. 矿物纤维绝缘

The addition of 矿物纤维 insulation in any thickness and with and without facers is permitted in the stud cavities of any wood stud or steel stud wall assemblies described under the U300, V300, W300, U400, V400、w400系列墙体设计. 

Horizontal butt joints on opposite sides of the studs in single-layer applications should be staggered a minimum of 12 in. 除非在个别设计中另有说明. Horizontal butt joints in adjacent layers on the same face of the assembly in multiple-layer applications should be staggered a minimum of 12 in. 除非在个别设计中另有说明.​

Item 11 of the General Explanatory Notes of the Gypsum Association’s Fire Resistance Design Manual 声明如下:

When not specified as a component of a fire tested wall or partition system, 矿物纤维, 玻璃纤维, or cellulose fiber insulation of a thickness not exceeding that of the stud depth shall be permitted to be added within the stud cavity.

当使用IBC第722节中的组件添加方法选项时.6, an additional 15 minutes of fire resistance is allowed when including insulation batts in walls; however, 楼板/屋顶则不提供上述津贴.

在地板或屋顶组件上增加绝缘材料:

第III节，地板天花板和屋顶天花板 UL目录的设计信息部分 声明如下:

17. 保温毡保温

除非在个别设计中有特别说明, the addition of insulation in the concealed space between the ceiling membrane and the floor or roof structure may reduce the hourly rating of an assembly by causing premature disruption of the ceiling membrane and/or higher temperatures on structural components under fire-exposure conditions.

绝缘在G500, L500, M500和P500系列设计 - 1小时额定G500, L500, M500和P500系列组件, 玻璃纤维绝缘, 要么松散, or faced or unfaced batts or blankets may be added to the plenum or joist space above the gypsum board, 提供一层额外的石膏板添加到组装. The gypsum board should be of the same type as shown in the individual designs. The base layer of gypsum board should be attached with the fastener type and spacing as described in the design. 基层接缝处不需要用胶带. The finish layer of gypsum board should also be attached with the fastener type and spacing as described in the individual design. The length of the fasteners should be increased by a minimum of the gypsum board thickness of the additional layer. The joints in the finish layer should be finished as described in the design.

Other methods of adding insulation in the plenum or joist cavity are not permitted unless indicated in the individual designs.​​

Item 12 of the General Explanatory Notes of the Gypsum Association’s Fire Resistance Design Manual 声明如下:​

在地板-天花板或屋顶-天花板系统, the addition or deletion of mineral or 玻璃纤维 insulation in ceiling joist spaces could possibly reduce the fire-resistance rating. 增加最多16-3/4英寸的0.5pcf玻璃纤维绝缘(R-40), 球垫或松垫都可以, to any 1- or 2-hour fire resistance rated floor-ceiling or roof-ceiling system having a cavity deep enough to accept the insulation is permitted provided that one additional layer of either 1/2 inch type X or 5/8 inch type X gypsum board is applied to the ceiling. The additional layer of gypsum board shall be applied as described for the face layer of the tested system except that the fastener length shall be increased by not less than the thickness of the additional layer of gypsum board.​

Placement of the added insulation within the depth of the floor cavity is also important and, 最明显的是, has an impact on the required maximum spacing of resilient channels if present. 例如，组装 UL L521 关于弹性通道间距的说明如下:

6. 〇弹性通道由垂直于桁架安装的最小25 MSG镀锌钢形成. When there is no insulation installed in the concealed space the resilient channels are spaced 24 in. OC. 当绝缘 (Item 5) is secured to the underside of the subfloor the resilient channels are spaced 16 in. OC. 当绝缘, 项目5, 5A or 5B is applied over the resilient channel/gypsum panel ceiling membrane, 或当项目5C或5E应用于底层地板的底面时, 弹性通道的间距为12英寸. OC.

关于相关主题, some designers find themselves needing to add wood structural panels for shear wall purposes to wall assemblies that weren’t tested with them. 有关这方面的更多信息，请参阅此WoodWorks 向专家请教 关于火灾设计的启示和这个 向专家请教 张贴声学设计的影响.