Annulus or Annuli
CMU - Concrete Masonry Unit
Deflection (slip) Track Wall Assembly
EMT - Electrical Metal Tubing
Fire Rated or Fire Resistance
Fire Resistance Classification
Fire Test Standard
Standard Temperature /Time Curve
Top of Wall
Working ("pot") Life
Ablation - A self regulation heat and mass transfer process in which incident thermal
energy is expended by sacrificial loss of material. (ASTM)
ABS Pipe - Acrylonitrile-Butadiene-Styrene pipe - a plastic pipe used for water
distribution, drain, waste, vent and sewage.
Failure - Failure of the bond between the sealant, adhesive, or
coating and substrate surface.
Annuli - The gap between the penetrating item and the outside edge
of the hole.
ASTM - American Society for Testing and Materials; an independent consensus standards
generating group composed of volunteers.
Backer Rod - A cylindrical polyurethane or polyethylene foam material used to provide
support and set the proper depth of material for gunned or troweled in place sealant.
Material - Combustible or noncombustible material used to provide
support for gunned or troweled in place sealant.
Cable Tray - An opened or closed steel ladder which may be used to support multiple cables
in power plants and commercial buildings.
Char, (noun) - A grayish black, crusty material formed by burning organic type
Classification - A series of procedures, usually administered by an independent testing
laboratory, by which the consumer is protected and assured that the product which was
tested is the same as the product purchased.
Closed System - A piping system which is sealed, typically carrying fluids under pressure,
such as hot and cold water distribution. The exact definition on a closed pipe system is
determined by the local authority having jurisdiction. For instance, electrical conduit in
a vertical orientation through a roof installation may be considered a vented system and
the same conduit in a horizontal orientation or penetrating through a floor may be
- Concrete Masonry Unit, such as concrete block. Usually hollow.
Cohesion - The molecular attraction that holds the body of a sealant or adhesive
together. The internal strength of an adhesive or sealant.
Failure - Failure characterized by rupture within the sealant,
adhesive, or coating.
Collar - A galvanized sheet metal restricting device used in conjunction with plastic
pipe. Its function is to direct and control the intumescent action of the firestopping
Compatibility - The capability of two or more materials to be placed in contact or close
proximity with one another and each material maintaining its usual physical or chemical
properties, or both.
Concentric - Having a common center; penetration material centered in the middle of a
Control Joint - A formed, sawed, tooled, or assembled joint acting to regulate the location
and degree of cracking and separation resulting from the dimensional change of different
elements of a structure.
CPVC Pipe - Chlorinated Polyvinyl Chloride pipe - a higher type grade of plastic pipe
commonly used for hot/cold water distribution, sprinkler piping, and some chemicals.
Suitable for high temperatures.
Cure - In sealants, the process by which a compound attains its intended properties
through evaporation, chemical reaction, heat, radiation, or combinations thereof.
Deflection (slip) Track Wall Assembly - A specifically
designed assembly at the top of non-load bearing gypsum walls. This assembly usually
consists of "nested" stud and track members as a seismic feature which both
architects and state officials (California) believe provides protection to interior
non-load bearing walls.
Detail - Technical drawing, complete with instructions on how to install a system.
DWV Pipe - Non-pressure (vented) piping used for Drain, Waste or Vent.
Eccentric - Off center; annulus will vary in through-penetration opening; penetration
materials will not be in the center of the opening.
Elasticity - The ability of a material to return to its original shape after removal of a
Elastomer - A macromolecular material that returns rapidly to approximately the initial
dimensions and shape after substantial deformation by a weak stress and release of the
Elastomeric - Having the characteristics of an elastomer.
Elongation - Extension produced by a tensile stress.
- Electrical Metal Tubing; a thin wall galvanized steel pipe used to carry electrical or
other types of conductors.
Endothermic - A process or change that takes place with absorption of heat and requires high
temperature for initiation and maintenance.
Joint - A structural separation between building elements that
allows independent movement without damage to the assembly.
F Rating - A firestop shall be considered as meeting the requirements for an F rating
when it remains in the opening during the fire test and hose stream test within the
following limitations: The firestop shall have withstood the fire test for the rating
period without permitting the passage of flame through openings, or the occurrence of
flaming on any element of the unexposed side of the firestop. During the hose stream test,
the firestop shall not develop any opening that would permit a projection of water from
the stream beyond the unexposed side. (ASTM E 814)
Fire Endurance - A measure of the elapsed time during which a material or assembly continues to
exhibit fire resistance under specified conditions of test and performance. As applied to
elements of buildings, it shall be measured by the methods and the criteria defined in
ASTM E 119 Fire Tests of Building Construction and Materials, ASTM E 152 Fire Tests of
Door Assemblies, or ASTM E 163 Fire Tests of Window Assemblies. (ASTM)
Fireproof, (adjective) - An inappropriate and misleading term, not to be used. (ASTM)
Rated or Fire Resistance - A system which has been tested in
accordance with the appropriate ASTM test standard and has met the mechanical and
endurance requirements of that standard. The property of a material or assembly to
withstand fire or give protection from it. As applied to elements of buildings, it is
characterized by the ability to confine a fire or to continue to perform a given
structural function, or both. Such testing is conducted by a nationally recognized
laboratory which rates the system for 1, 2, 3 or 4 hours, based on the results of the fire
Fire Resistance Classification - A standard rating of
fire-resistance and protective characteristics of a building construction or assembly.
(ASTM E 119)
Firestop - A through-penetration firestop is a specific construction consisting of all
materials that fill the opening around penetrating items such as cables, cable trays,
conduits, ducts, and pipes and their means of support through the wall or floor to prevent
spread of fire. (ASTM)
Standard -Fire test standards are procedures intended to measure and
describe the response of materials, products, and systems to sources of heat or flame
under controlled conditions. These tests are intended to provide information useful for
such purposes as product development, quality control, and specification description. They
are not intended to be used alone to provide a measure of the fire hazard of materials,
products, or systems. One or more fire test standards, however, may be used as part of a
fire hazard standard. Fire test standards are separate and distinct from fire hazard
standards, which are used to describe, measure, assess, or control the behavior of
materials, products, and systems in the relevant environment. (ASTM)
Intumesce - To swell, enlarge, inflate or expand, as with heat; Biostop(R) series of firestopping sealants swell to close gaps or voids in through-penetration openings
when exposed to high heat conditions.
Joint/Gap - The space or opening between two or more adjoining surfaces.
L Rating - Air leakage test rating. As defined in the UL "Fire Resistance
Directory":"The L rating criteria determines the amount of air leakage, in cubic
feet per minute per square foot of opening (CFM/sq ft), through the firestop system at
ambient and/or 400°F air temperatures at an air pressure differential of 0.30 in. W.C.
The L ratings are intended to assist authorities having jurisdiction, and others, in
determining the suitability of firestop systems for the protection on penetrations and
miscellaneous openings in floors and smoke barriers for the purpose of restricting the
movement of smoke in accordance with the National Fire Protection Association Life Safety
Code, NFPA 101.
Mineral Fiber - A noncombustible insulation material made from mineral fibers. It is also
known as mineral wool or safing material. It is typically used as a backing and filler
material in through-penetrations.
Modulus - The ratio of stress to strain. Also the tensile strength at a given
MSDS -Material Safety Data Sheet. A regulatory document describing the health and
safety aspects of a material as it pertains to its properties, health effects, hazards,
handling, and disposal.
Diameter - Commonly referenced in pipe and tubing sizes; may refer
to the inside diameter, the median diameter or the outside diameter of the
Sealant - A compound that exhibits little or no flow when applied in
vertical or inverted joints.
Open System - An open system or sometimes referred to as a vented system is a piping system
which allows air flow to the exterior of the building to prevent back flow or vacuum,
i.e.: DWV pipe system (Drain, Waste or Vent). The exact definition on a open piping system
is determined by the local authority having jurisdiction. For instance, electrical conduit
in a vertical orientation through a roof installation may be considered a vented system
and the same conduit in a horizontal orientation or penetrating through a floor may be
PB Pipe - Polybutylene pipe; a plastic pipe that is typically used for cold and hot
water distribution. It is a material that melts quickly when exposed to heat.
PE Pipe - Polyethylene pipe; a plastic pipe that is typically used for gas distribution.
It is a material that melts quickly when exposed to heat.
PP Pipe - Polypropylene pipe; a plastic pipe that is suitable for higher temperature
applications and is typically used for hot and cold water distribution and some chemical
services. It is a material that melts quickly when exposed to heat.
PVC Pipe - Polyvinyl chloride pipe - a common plastic pipe used for cold water
distribution in both pressure (closed) or vented (DWV) applications. It is a material that
melts quickly when exposed to heat.
Sealant - A material that has the adhesive and cohesive properties to form a seal.
Backing - A compressible material placed in a joint before applying
Sealant - A compound that exhibits flow sufficient to seek
Shelf Life - The maximum time packaged materials can be stored under specified conditions
and still meet the performance requirements specified.
Shrinkage - A decrease in length, area, or volume.
Standard Temperature /Time Curve - A graphical
representation derived from prescribed time-temperature relationships and used to control
burn test furnace temperatures with progressing time. (ASTM)
Steel Sleeve -A form used when pouring concrete to provide space for a penetrating item. Also
may be used inside hollow construction walls to prevent firestopping materials from
entering wall cavities unnecessarily.
Sealant - A sealant capable of transferring dynamic or static
("live" or "dead", or both) loads, or both, across joint members
exposed to service environments typical for the structure involved.
Substrate - A material upon which films, treatments, adhesives, sealants, membranes, and
coatings are applied.
System Number - A number assigned to a specific detail or series of similar details which are
then indexed in numerical order in a reference book or directory.
Strength - Resistance of a material to a tensile force (stretch).
The cohesive strength of a material expressed in psi.
Tooling - The act of compacting and contouring a sealant in a joint.
Tooling Time - The time interval after application of a one-component sealant or after mixing
and application of multi-component sealant during which tooling is possible.
Top of Wall - The joint/gap located above a non-load bearing wall and below the ceiling,
deck, or floor.
T Rating - A firestop shall be considered as meeting the requirements for a T rating when
it remains in the opening during the fire test and hose stream test within the following
limitations: The transmission of heat through the firestop during the rating period shall
not have been such as to raise the temperature of any thermocouple on the unexposed
surface of the firestop or on any penetrating item more than 325 ° F above its initial
temperature. Also, the firestop shall have withstood the fire test for the rating period
without permitting the passage of flame through openings, or the occurrence of flaming on
any element of the unexposed side of the firestop. During the hose stream test, the
firestop shall not develop any opening that would permit a projection of water from the
stream beyond the unexposed side. (ASTM E 814)
Penetration - Consists of three items: 1) wall or floor construction
2) penetrating item or absence thereof 3) the hole or void.
Underwriters Laboratories Incorporated; an independent testing laboratory.
Elongation - Elongation at failure.
- Warnock Hersey International, Incorporated; and independent testing laboratory.
Wire Mesh - Galvanized steel hardware cloth used to support backing material in gypsum
wallboard and hollow concrete block construction.
("pot") Life - The time interval after opening a container
of a single component sealant, or after mixing the components of a multi-component
sealant, during which application and tooling is possible.
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