ISO 13785-2:2002规定了一种试验方法，用于确定当暴露在模拟室内火灾的热量和火焰中时，材料和立面覆层结构对火灾的反应，火焰从窗户开口处冒出并直接撞击到立面上。该测试产生的信息也可能适用于外部火灾冲击立面的情况；然而，结果可能不适用于所有火灾暴露条件。 该方法仅适用于非承重的立面和覆层。未尝试确定立面或覆层的结构强度。 本试验的目的不是确定给定建筑立面的火灾行为。本测试不考虑阳台、窗户、百叶窗、窗帘等细节。该测试不包括火灾蔓延的风险。 g、 透过窗户可以看到立面系统的细节，因为它只是作为立面墙建造的。有明显证据表明，与平面立面相比，内墙角（也称为重入角）结构会产生更强烈的火灾暴露。最常见的内部重入角为90°。因此，测试正面样本包含一个90°重入角的内角。 所述试验方法旨在评估非易燃建筑的立面和覆层中是否包含可燃部件。

ISO 13785-2:2002 specifies a method of test for determining the reaction to fire of materials and construction of fa？ade claddings when exposed to heat and flames from a simulated interior compartment fire with flames emerging through a window opening and impinging directly on the fa？ade. The information generated from this test may also be applicable to the scenario of an external fire impinging on a fa？ade; however, the results may not be applicable for all fire exposure conditions. This method is applicable only to fa？ades and claddings that are non-loadbearing. No attempt is made to determine the structural strength of the fa？ade or cladding. This test is not intended to determine the fire behaviour of a given building fa？ade. Details such as balconies, windows, window shutters, curtains, etc., are not considered in this test. This test does not include the risk of fire spread e.g. through the window details of the fa？ade system as it only is constructed as a fa？ade wall. There is clear evidence that an internal corner (also called a re-entrant corner) configuration produces a more intense fire exposure than a flat fa？ade. The most commonly encountered internal re-entrant corner is with an angle of 90°. The test fa？ade specimen therefore contains an internal corner with a re-entrant angle of 90°. The test method described is intended to evaluate the inclusion of combustible components within fa？ades and claddings of buildings which are otherwise of non-combustible construction.