A penetration, in
firestopping, 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, ac ...
, 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.
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 wid ...
is about to be cast. The cans are located by the plumber. Once the penetrants are in place, one can firestop.
Image:Sprinkler branch penetration.jpg, A penetration, in this case without a firestop.
Image:Mortar tag.jpg, A firestopped penetration
See also
*
Sleeve (construction)
*
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 floo ...
*
Annulus (firestop)
*
Joint (building)
*
Penetrant (mechanical, electrical, or structural)
*
Mortar (firestop)
*
Firestop pillow
*
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 ...
{{div col end
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 opera ...
Penetration seal (firestop) vendor listings by Thomas Register
Passive fire protection
Building engineering
Firestops