1、 The roof panel of non accessible roof (such as arched roof panel) can adopt single-sided color steel plate.

二、采用可燃材料（聚苯乙烯、聚氨酯等）作為芯材的金屬夾芯板材，火災(zāi)時易蔓延且難以撲救，產(chǎn)生大量有毒煙氣，應(yīng)以嚴(yán)格控制。

2、 The metal sandwich plate with combustible materials (polystyrene, polyurethane, etc.) as the core material is easy to spread and difficult to put out in case of fire, resulting in a large amount of toxic smoke, which should be strictly controlled.

三、采用不燃材料（A級）作為芯材的金屬夾芯板材，可以應(yīng)用在建筑中的非承重外墻、房間隔墻和屋面板等部位，但應(yīng)滿足《建規(guī)》規(guī)定的對應(yīng)耐火極限要求（3.2.1、5.1.2）。具體說明如下：

3、 The metal sandwich plate with incombustible material (Class A) as the core material can be applied to the non load-bearing exterior wall, room partition wall, roof slab and other parts of the building, but shall meet the corresponding fire resistance limit requirements (3.2.1, 5.1.2) specified in the building code. The specific instructions are as follows:

1、建筑中的防火墻、承重墻、樓梯間的墻、疏散走道隔墻、電梯井的墻以及樓板等構(gòu)件，不能采用金屬夾芯板材。

1. The firewall, load-bearing wall, staircase wall, evacuation aisle partition wall, elevator shaft wall, floor and other components in the building shall not use metal sandwich plate.

這些部位要求具有較高的燃燒性能和耐火極限，不燃金屬夾芯板材的耐火極限受其夾芯材料的容重、填塞的密實度、金屬板的厚度及其構(gòu)造等影響，不同生產(chǎn)商的金屬夾芯板材的耐火極限差異較大且通常均較低，難以滿足相應(yīng)建筑構(gòu)件的耐火性能、結(jié)構(gòu)承載力及其自身穩(wěn)定性能的要求，因此不能采用金屬夾芯板材。

These parts are required to have high combustion performance and fire resistance limit. The fire resistance limit of incombustible metal sandwich panels is affected by the volume weight of the sandwich material, the compactness of the packing, the thickness and structure of the metal plate, etc. the fire resistance limits of metal sandwich panels from different manufacturers vary greatly and are usually low, which is difficult to meet the fire resistance of corresponding building components The requirements of structural bearing capacity and its own stability performance, so metal sandwich plate can not be used.

2、耐火等級為一、二級的建筑，其非承重外墻、房間隔墻等，不宜采用金屬夾芯板材。

2. For buildings with fire resistance rating of grade I and II, metal sandwich plates should not be used for non load-bearing exterior walls and room partitions.

依《建規(guī)》要求（3.2.1、5.1.2），這些部位的耐火極限要求較高，分別為不低于0.75h和0.50h，參照上述原因，也不宜采用金屬夾芯板材。確需采用時，夾芯材料應(yīng)為不燃材料（A級），且應(yīng)確保符合對應(yīng)構(gòu)件的耐火極限要求。

According to the requirements of the building code (3.2.1 and 5.1.2), the fire resistance limit of these parts is higher, which is not less than 0.75h and 0.50h respectively. Referring to the above reasons, metal sandwich plate should not be used. When it is necessary to use, the sandwich material should be non combustible material (class a), and it should ensure that it meets the fire resistance limit requirements of corresponding components.

3、耐火等級為三、四級的建筑，其非承重外墻、房間隔墻等，可以采用金屬夾芯板材，但應(yīng)符合《建規(guī)》對相應(yīng)構(gòu)件的耐火極限要求。

3. For buildings with fire resistance rating of grade III and IV, metal sandwich plates can be used for non load-bearing exterior walls and room partitions, but they shall meet the fire resistance limit requirements of corresponding components in the building code.

4、非上人屋面的屋面板，可以采用金屬夾芯板材。

4. For the roof slab of non accessible roof, metal sandwich plate can be used.

5、對于上人屋面的屋面板，由于夾芯板材受其自身構(gòu)造和承載力的限制，無法達(dá)到《建規(guī)》相應(yīng)耐火極限要求，此類屋面不能采用金屬夾芯板材。

5. For the roof slab of accessible roof, because the sandwich plate is limited by its own structure and bearing capacity, it cannot meet the corresponding fire resistance limit requirements of the building code, and metal sandwich plate cannot be used for this kind of roof.