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A certification listing is a document used to guide installations of certified products against which a field installation is compared (see Listing and approval use and compliance) to make sure that it complies with a regulation, such as a building code. Products or items that are subject to product certification and must be used in a specific manner in order to be safe for use, are typically required to be installed or used in accordance with a subject-related certification listing. Certification listings are issued by organisations that are usually nationally accredited for doing both testing and product certification work, in accordance with nationally accredited standards. ==Example of fire door test== The following pictures illustrate an example of a successful fire test that led to a (UL listing ) or a three-hour fire protection rating. The entire assembly is exposed to a fire for the specified amount of time per the objective of the test. Following this heat exposure, a hose stream is applied to the door. Fire doors and fire dampers are derated from the fire barriers they are in. In this case, a 3-hour rated door is acceptable for use in up to a 4-hour wall. Because it goes into a 4-hour wall, it received a 45PSI (31N/cm²) hose stream test. Image:Ul_cfd_listing_drawing.jpg|(Fire door ) listing drawing Image: 3hr_cfd_double_door_inside_v460_durasteel_wall.jpg|Fully built fire separation with double door. Image: Cfd_construction_217.jpg|Test sample immediately after a 3-hour fire exposure. Image: Cfd_construction_234.jpg|45 PSI hose stream test following fire. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「certification listing」の詳細全文を読む スポンサード リンク
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