ISO的本部分规定了两系列矩形耐火砖的尺寸。这两个系列的砖可与ISO 5019/2中规定尺寸的拱砖系列一起使用。然而，此处列出的耐火砖的尺寸仅为许多国家目前生产的尺寸的有限数量，但据信，本文件中规定的尺寸包括熔炉施工中最常用的尺寸。

This part of ISO specifies the dimensions ot two series of rectangular refractory bricks. These two series of bricks may be used in conjunction with the series of arch bricks whose dimensions are specified in ISO 5019/2. However, the sizes of refractory bricks here listed are only a limited number of the size currently in production in many countries, but it is believed that size specified in this document include those most commonly used in furnace construction.