A penetration, in
firestop
A firestop or fire-stopping is a form of passive fire protection that is used to seal around openings and between joints in a fire-resistance-rated wall or floor assembly. Firestops are designed to maintain the fire-resistance rating of a wall o ...
ping, is an ''opening'', such as one created by the use of a cast-in-place
sleeve
A sleeve ( ang, slīef, a word allied to ''slip'', cf. Dutch ) is the part of a garment that covers the arm, or through which the arm passes or slips.
The sleeve is a characteristic of fashion seen in almost every country and time period, acro ...
, in a wall or floor assembly required to have a
fire-resistance rating
A fire-resistance rating typically means the duration for which a passive fire protection system can withstand a standard fire resistance test. This can be quantified simply as a measure of time, or it may entail other criteria, involving eviden ...
, 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.
Images
Image:Cans_form_penetrations.jpg, Sheet metal
Sheet metal is metal formed into thin, flat pieces, usually by an industrial process. Sheet metal is one of the fundamental forms used in metalworking, and it can be cut and bent into a variety of shapes.
Thicknesses can vary significantly; ex ...
cans are nailed to form boards where concrete
Concrete is a composite material composed of fine and coarse aggregate bonded together with a fluid cement (cement paste) that hardens (cures) over time. Concrete is the second-most-used substance in the world after water, and is the most wi ...
is about to be cast. The cans are located by the plumber. Once the penetrants are in place, one can firestop
A firestop or fire-stopping is a form of passive fire protection that is used to seal around openings and between joints in a fire-resistance-rated wall or floor assembly. Firestops are designed to maintain the fire-resistance rating of a wall o ...
.
Image:Sprinkler branch penetration.jpg, A penetration, in this case without a firestop
A firestop or fire-stopping is a form of passive fire protection that is used to seal around openings and between joints in a fire-resistance-rated wall or floor assembly. Firestops are designed to maintain the fire-resistance rating of a wall o ...
.
Image:Mortar tag.jpg, A firestopped penetration
See also
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Sleeve (construction) {{inline, date=November 2020
In construction, a sleeve is used both by the electrical and mechanical trades to create a penetration in a solid wall, ceilling or floor.
Purpose
* For cables we provide wall/deck penetration sleeve to avoid any da ...
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Passive fire protection
Passive fire protection (PFP) is components or systems of a building or structure that slows or impedes the spread of the effects of fire or smoke without system activation, and usually without movement. Examples of passive systems include floor- ...
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Annulus (firestop) {{unreferenced, date=March 2015
The annulus, or annular space, is the space between a penetrant and whatever surrounds it, such as the sides of an opening or a sleeve
A sleeve ( ang, slīef, a word allied to ''slip'', cf. Dutch ) is the part ...
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Joint (building)
A building joint is a junction where building elements meet without applying a static load from one element to another. When one or more of these vertical or horizontal elements that meet are required by the local building code to have a fire-resis ...
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Penetrant (mechanical, electrical, or structural)
Penetrants, or penetrating items, are the mechanical, electrical or structural items that pass through an opening in a wall or floor, such as pipes, electrical conduits, ducting, electrical cables and cable trays, or structural steel beams and c ...
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Mortar (firestop)
Mortar is a workable paste which hardens to bind building blocks such as stones, bricks, and concrete masonry units, to fill and seal the irregular gaps between them, spread the weight of them evenly, and sometimes to add decorative colors or pa ...
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Firestop pillow
Firestop pillows are passive fire protection items used for firestopping holes to achieve fireproofing. The various kinds of firestop pillows are intended to slow the spread of fire. They are often used to meet fire-resistance ratings in conduit ...
*
Fire test
A fire test is a means of determining whether fire protection products meet minimum performance criteria as set out in a building code or other applicable legislation. Successful tests in laboratories holding national accreditation for testing and ...
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External links
Penetration seals (firestops) treatise by Warrington labsPenetration seals (firestops) treatise byNuclear Regulatory Commission
The Nuclear Regulatory Commission (NRC) is an independent agency of the United States government tasked with protecting public health and safety related to nuclear energy. Established by the Energy Reorganization Act of 1974, the NRC began operat ...
Penetration seal (firestop) vendor listings by Thomas Register
Passive fire protection
Building engineering
Firestops