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Penetration (firestop) : ウィキペディア英語版 | Penetration (firestop)
A penetration, in firestopping, is an ''opening'', such as one created by the use of a cast-in-place sleeve, in a wall or floor assembly required to have a fire-resistance rating, for the purpose of accommodating the passage of a mechanical, electrical or structural penetrant. The penetration may or may not contain a firestop system. A ''penetration'' is not a ''penetrant''. A penetration may or may not include a penetrant. ==Old terminology==
The nuclear industry in particular used to refer to firestops as "penetration seals" or "penseals". These terms are superseded by the term firestop. Whereas penetration seals or penseals only dealt with openings made to accommodate penetrants, firestops now also include Joint (building).
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「Penetration (firestop)」の詳細全文を読む
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