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see also|multiple image | image1 = Brandwand_2.jpg | width1 = 125 | caption1 = Firewall residential construction, separating the building into two separate residential units, and fire areas. | image2 = Brandwand_3.jpg | width2 = 222 | caption2 = Firewall, as seen on the inside of a newly constructed townhouse unit, showing how the firewall goes past the roofline. | image3 = Firewall_Electrical_Substation.jpg | width3 = 222 | caption3 = Example of a firewall (tested, not listed or certified by Southwest Research Institute) used to inhibit the spread of a fire at an electrical substation. }} A firewall is a fire resistant barrier used to prevent the spread of fire for a prescribed period of time. Firewalls are built between or through buildings, structures, electrical substation transformers, or within an aircraft or vehicle. == Applications == * Firewalls can be used to subdivide a building into separate fire areas and are constructed in accordance with the locally applicable building codes. Firewalls are a portion of a building's passive fire protection systems. * Firewalls can be used to separate high value transformers at an electrical substation in the event of a mineral oil tank rupture and ignition. The firewall serves as a fire containment wall between one oil-filled transformer and other neighboring transformers, building structures, and site equipment. 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「Firewall (construction)」の詳細全文を読む スポンサード リンク
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