These tests are applicable to joint systems of various materials
and construction that are intended for use in linear openings
between adjacent fire resistive structures.
The fire endurance ratings for joint systems are intended to
register performance during the period of fire exposure and are not
intended to be interpreted as having determined the acceptability
of the joint systems for use before or after fire exposure. The
intent of these methods is to develop data to assist others in
determining the suitability of the joint systems where fire
resistance is required.
These requirements are intended to evaluate the length of time
that the types of joint systems specified in 1.1 will contain a
fire during a predetermined test exposure. The test evaluates the
joint system's resistance to heat and, in some instances, to a hose
stream, while carrying an applied load if the assembly is load
bearing. The method of testing also includes optional air leakage
tests to determine the rate of air leakage through joint systems
resulting from a specified air pressure difference applied across
the surface of the joint systems.
Under these requirements a joint system is subjected to a
standard fire exposure controlled to achieve specified temperatures
throughout a specified time period. This exposure by itself is not
intended to be representative of all fire conditions; conditions
vary with changes in the amount, nature and distribution of fire
loading, ventilation, compartment size and configuration, and heat
sink characteristics of the compartment.
All joint systems are cycled through their intended range of
movement prior to fire exposure to demonstrate the joint system's
range of movement and the impact of the joint system during
movement on the adjacent fire resistive structures. Joint systems
are required to be loaded to their designed live load capacity
during the fire test. For tests of wall-to-wall and head-of-wall
joint systems, the fire test is followed by the application of a
specified standard hose stream.
These requirements cover the measurement of the transmission
through the joint system of heat and gases sufficiently hot to
ignite cotton waste.
These requirements provide a relative measure of fire
performance of comparable assemblies under these specified fire
exposure conditions. Any variation from the construction or
conditions that are tested, such as method of assembly and
materials, is not within the scope of this test method.
Tests for evaluating the suitability of poured or
formed-in-place materials for use in joint systems under non-fire
conditions are found in the Standard Test Method for Adhesion and
Cohesion of Elastomeric Joint Sealants Under Cyclic Movement
(Hockman Cycle), ASTM C719.
Tests for evaluating the suitability of joint systems other than
those with poured or formed-in-place materials under non-fire
conditions are found in the Standard Test Method for Cyclic
Movement and Measuring the Minimum and Maximum Joint Widths of
Architectural Joint Systems, ASTM E1399/E1399M.
Tests for determining the hourly fire endurance ratings of walls
and floors are found in the Standard for Fire Tests of Building
Construction and Materials, UL 263. Standard UL 263 shall be
permitted to be used to determine the hourly fire endurance rating
of walls and floors with control joints.
Tests for determining the surface burning characteristics of
building materials, based on the rate of flame spread, are found in
the Standard for Test for Surface Burning Characteristics of
Building Materials, UL 723.
The results of these tests represent one factor in assessing
fire performance of joint systems. These requirements prescribe a
standard fire exposure for comparing the performance of joint
systems. Application of these test results to predict the
performance of actual building construction requires careful
evaluation of test data.
The method of testing also includes optional air leakage tests
to determine the rate of air leakage through fire resistive joint
systems resulting from a specified air pressure difference applied
across the surface of the systems. The results obtained from the
optional air leakage tests are expressed in cubic feet per minute
(cubic meter per second) per lineal foot (lineal meter) of opening.
The results are intended to develop data to assist authorities
having jurisdiction, and others, in determining the acceptability
of joint systems with reference to the control of air movement
through the assembly.
The method of testing also includes optional water leakage tests
to determine the ability of fire resistive joint systems to resist
the passage of water under a three foot pressure head. This method
does not evaluate the ability of uncured joint systems to resist
An L rating may also be established for a fire resistive joint
system. The L rating is based on the amount of air leakage through
the test sample.
A W rating may also be established for a fire resistive joint
system. The W rating is based on the water resistance of the test