Dynamic and Static Head-of-Wall Joint Fire Protection Wall Joint Fire ...

Course Sponsor
Dynamic and Static
Head-of-Wall Joint Fire Protection
California Expanded Metal
Company
263 North Covina Lane
City of Industry, CA 91744
Phone
425-591-4174
Dynamic and Static Head-of-Wall Joint Fire Protection
E-mail
arosin@cemcosteel.com
Web
www.cemcosteel.com
Course Number
CEM05A
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quiz online at ronblank.com to receive credit
An AIA Continuing Education Program
Credit for this course is 1 AIA/ CES HSW Learning Unit

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An American Institute of Architects (AIA)
Continuing Education Program
Course Format: This is a structured, web-based, self study course with
a final exam.
Course Credit: 1 Health Safety & Welfare (HSW) learning unit (LU)
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is prohibited.

Course Objectives
Upon Completion of this course the Design Professional will be
able to:
• Explain what a Head of Wall joint is
• Describe what constitutes a Head of Wall assembly
• Explain what information is contained in the heading of a UL
listed assembly
• Explain how the four standards are measured to determine UL
2079 approval
• Determine the deflection capacity of joint treatments
• Explain the hourly rating of joint treatments
• Explain what comprises the L-rating of joint treatments
• List the joint treatment types and what the
advantages/disadvantages of each are
• Describe what Architect, Engineer, and Specification
professionals consider when specifying protection of dynamic
or static head of wall joints

What is a Head-of-Wall Joint
Joint

What Is A Head Of Wall Joint
• A head of wall joint is the gap distance between the wall or
wall sheathing and the overhead structure.
• The joint (based on amount of deflection required) is
designed and constructed to allow for vertical movement
(allowing wall to move independent of the structure) due to
forces such as Live/Dead loading, thermal
expansion/contraction, wind sway, or seismic movements.
• The head of wall joint allows vertical movement without
damaging the wall or wall sheathing

What Constitutes A
What Constitutes A
Head Of Wall Assembly

What Is A Cold Formed Steel/Gypsum
Head Of Wall Assembly
• A head of wall assembly is comprised of and defined by the
• A head of wall assembly is comprised of and defined by the
following elements:
• Overhead structure
• Top of wall framing deflection system
• Fill, void, or cavity materials protecting any joints

Types Of Overhead Structures
Overhead structure profiles:
Fluted pan deck
Includes either floor or roof pan deck assemblies varying in
flute size, height, and configuration
Flat Concrete
Any overhead consisting of a concrete surface having a flat
surface area
Structural steel support
Cases where a wall is aligned underneath a structural steel
support such as steel I-beam or open web truss

Typical Top Of Wall Deflection Systems
Single long leg track
U-shaped track having typically longer legs
Double track
A nested track configuration of two u-shaped profiles
Slotted track
U-shaped track having vertical slots located in the legs
allowing for fastener attachment through the slots
Clipped track
U-shaped track having pre-installed slotted clips that allow for
attachment of fasteners through the slots

Typical Top Of Wall Deflection Systems
“T” shaped “shoulder” track
“T” shaped track that creates a shoulder which allows for
attachment of drywall rips aligned with the exterior surface of
the wall to protect the head of wall gap
U-shaped filled track
U-shaped track which incorporates the use of plastic bags
and fire proofing fill in a composite assembly
Shoulder Track
U-Shaped Track

Types Of Fill, Void, Or Cavity Materials
Used In Joint Protection
Mineral wool
Mineral based wool insulation
Caulks/sprays
Uncured mastic materials applied “wet” typically having
some elastomeric and intumescent properties
Drywall
Rips of drywall or gypsum sheet material
Flute plates
Materials used to protect flute (i.e. contour cut drywall or
metal plate enclosures)
Fire proofing
Cement or fiber based spray on materials
Steel Intumescent Fire Stop
Composite intumescent material metal profile
configurations

What Information Is Contained In The
What Information Is Contained In The
Heading Of A UL Listed Assembly

What Information Is Presented In The
Header Section Of A UL Listing
UL listing example
• System No. HW-D-0420
– Assembly Rating – 1 and 2 HR (see item 2)
– L Rating at Ambient – Less Than 1 CFM/Lin ft
– L Rating at 400 F – Less Than 1 CFM/Lin ft
– Nominal Joint Width – ½ in. and 1 in. (see item 3)
– Class II and III Movement Capabilities – 100% Compression
and Extension

Dynamic Or Static Designation
• System No. HW-D-0420
– Assembly Rating – 1 and 2 HR (see item 2)
– L Rating at Ambient – Less Than 1 CFM/Lin ft
– L Rating at 400 F – Less Than 1 CFM/Lin ft
– Nominal Joint Width – ½ in. and 1 in. (see item 3)
– Class II and III Movement Capabilities – 100% Compression
and Extension
• Head of wall system listings are designated by the “HW”
• Dynamic assemblies allowing movement have the “D”
included in the system number
• Static assemblies rated as having no movement capabilities
would be designated with an “S” in lieu of the “D” included in
the system number

Hourly Rating Of Assembly
• System No. HW-D-0420
– Assembly Rating – 1 and 2 HR (see item 2)
– L Rating at Ambient – Less Than 1 CFM/Lin ft
– L Rating at 400 F – Less Than 1 CFM/Lin ft
– Nominal Joint Width – ½ in. and 1 in. (see item 3)
– Class II and III Movement Capabilities – 100% Compression
and Extension
The rating allowed by the assembly is listed on the second line
and is outlined in the detail section specifying the layers and
type of sheathing or thickness of wall materials

L-rating (Optional Air Leakage)
of Assembly
• System No. HW-D-0420
– Assembly Rating – 1 and 2 HR (see item 2)
– L Rating at Ambient – Less Than 1 CFM/Lin ft
– L Rating at 400 F – Less Than 1 CFM/Lin ft
– Nominal Joint Width – ½ in. and 1 in. (see item 3)
– Class II and III Movement Capabilities – 100% Compression
and Extension
If the assembly has been tested in accordance with the
optional air leakage test the measured ratings will be listed at
both ambient (room) and elevated (400 deg F) temperatures

Nominal Joint Width
• System No. HW-D-0420
– Assembly Rating – 1 and 2
HR (see item 2)
– L Rating at Ambient – Less
Than 1 CFM/Lin ft
– L Rating at 400 F – Less Than
1 CFM/Lin ft
– Nominal Joint Width – ½ in.
and 1 in. (see item 3)
– Class II and III Movement
Capabilities – 100%
Compression and Extension
The nominal or “installed” joint width is specified as this is the base
from which to calculate the overall deflection capacity of the joint
materials used in the assembly

Movement Class And Capabilities
• System No. HW-D-0420
– Assembly Rating – 1 and 2 HR (see item 2)
– L Rating at Ambient – Less Than 1 CFM/Lin ft
– L Rating at 400 F – Less Than 1 CFM/Lin ft
– Nominal Joint Width – ½ in. and 1 in. (see item 3)
– Class II and III Movement Capabilities – 100%
Compression and Extension
The class of movement (cycles/min) provides a rating on how
much cyclical movement joint materials can handle without
failure of the joint materials or attachment
The compression and extension rating define the joint material
capabilities and how far the assembly can deflect from the
installed or nominal gap without adversely affecting the joint
materials or wall assembly

Which Four Standards Are Measured To
Determine UL 2079 Approval

UL 2079
• Four measured standards for certification
1) Cyclical Testing (Movement)
2) Flame passage (F-rating)
3) Thermal passage (T-rating)
4) Hose Stream (H-rating)
• Optional rating
1) Leakage rating (L-rating)

What Is The UL 2079 Test Standard
• The majority of building codes relating to the fire protection of
dynamic joints at the top of fire rated partitions are based on
the UL 2079 test standards
• The UL 2079 standards are the most current criteria for testing
dynamic joints and fire protection of them
• Additional test standards and criteria which are incorporated
• Additional test standards and criteria which are incorporated
into the UL 2079:
– ASTM E-119
– ASTM E-814
– ASTM E-1966

How Do You Determine The Deflection
Capacity Of Joint Treatments
t

What Is The Dynamic Cycle Test
The dynamic cycle test is when an entire assembly including
the wall, wall framing, sheathing, overhead, and joint
materials are cycled to determine movement capabilities
before the fire and hose stream test
Three measurements are used to determine the class rating
and deflection capabilities of the assembly and joint materials
• Cyclical abilities of the joint materials
• Nominal gap of the joint
• Movement Capabilities ii i

Level Of Cycle In Joint Protection
Entire assembly and joint materials are cycled prior to fire
exposure determining the limit and rating at which level the
materials and connection to the structure remain in tact
• Three levels of cycle
– Level I = 1 cycle/min for 500 cycles (Thermal)
– Level II = 10 cycles/min for 500 cycles (Wind Sway)
– Level III = 30 cycles/min for 500 cycles (Seismic)

Nominal (Installed) Gap and
Movement Capabilities
• The vertical gap distance between the overhead structure an
the wall/ wall sheathing is measured at time of installation
• This nominal distance is then used as the base to determine
the overall movement capabilities of the joint materials
• Movement capabilities are expressed as a % of the nominal
installed gap distance that joint materials can move during
compression and extension at a specified level of cycle
without adversely affecting the protection provided by the
joint materials

Example Of Movement Calculation
Table For UL Listing 25% Capability
System No. HW-D-0321
• Assembly ratings – 1 and 2 Hr (See Items 2 & 3A)
• Nominal Joint Width – 1 In. Max
• Class II Movement Capabilities – 25% Compression or
Extension
Nominal
Joint Width
25%
Compressi
on
25%
Extension
Two Way =
Compress. +
Ext.
Compression
Only
½” 1/8” 1/8” ¼” 1/8”
1” ¼” ¼” ½” 1/4”
2” ½” ½” 1” 1/2”
4” 1” 1” 2” 1”

Example Of Movement Calculation
Table For UL Listing 100% Capability
System No. HW-D-0420
• Assembly Rating – 1 and 2 Hr (See Item 2)
• L Rating at Ambient – Less than 1 CFM/Lin Ft
• L Rating at 400 deg F – Less than 1 CFM/Lin Ft
• Nominal Joint Width – ½ to 1 In. (See Item 2A)
• Class II and III Movement Capabilities – 100% Compression or
Extension
Nominal
Joint
Width
100%
Compressi
on
100%
Extension
Two Way =
Compress. +
Ext.
Compressi
on Only
½” (FS1) ½” ½” 1” ½”
¾” (FS1)* ¾” ¼” 1”* ¾”
1” (FS2) 1” 1” 2” 1”
2” (FS2) 2” --- --- 2”

What Are Hourly Rating Of Joint
What Are Hourly Rating Of Joint
Treatments

F & T Rating (Burn Test)
• After cycling of assembly the head of wall joint is opened to
the maximum allowable joint distance based on the cycle
test.
• Entire assembly subjected to fire measuring the thermal
passage of heat and restriction of flame through the assembly
• Maximum allowable rise in temperature on unexposed side of
wall/wall sheathing, fire stop materials, and joint materials is
350 deg F above ambient or 425 deg F.
• Assembly and joint materials must restrict the passage of any
flame or fire through to unexposed side to meet test criteria

Burn Test
• Left: The wall assembly from the "exposed" side after being
subjected to 2 hour burn
• Right: Close up of expanded intumescent; Steel
Intumescent Fire Stop still in place, and burnt mineral wool in
flute

Example UL Listing Hourly Rating
Gypsum/CFS framing
• System No. HW-D-0420
– Assembly Rating – 1 and 2 Hr (See Item 2)
– L Rating at Ambient – Less than 1 CFM/Lin Ft
– L Rating at 400 deg F – Less than 1 CFM/Lin Ft
– Nominal Joint Width – ½ to 1 In. (See Item 2A)
– Class II and III Movement Capabilities – 100% Compression
or Extension
• Item 2 from listing
• Wall Assembly – The 1 or 2 hr fire rated gypsum board/steel
stud wall assembly shall be constructed of the materials and
in the manner described in the individual U400-Series Wall or
Partition Design in the UL Fire Resistance Directory and shall
include the following construction features

Item 2 Wall Assembly
• Included in the Wall Assembly section details are the
approved materials and required installation of:
1) Ceiling/floor runners (track)
2) Studs or Wall Material (CMU/Block)
3) Gypsum board or Wall Sheathing

H – Rating (Hose Stream)
• Assembly removed from oven and subjected to a fire hose
stream test
– Water applied across entire assembly at 35 psi for approx
30 seconds (joint testing) from straight nozzle fire hose
– Test the effects of rapid cooling
– Measure performance of assembly to restrict any direct
stream of water from penetrating through the assembly
out the unexposed side
– Observe all materials including mineral wool or fire
proofing in deck flutes to avoid dislodging of materials
• Mineral wool in flutes
•Fire proofing in flutes
• Wall/Wall Sheathing on unexposed side
• Fire resistive joint materials
• Studs

H – Rating (Hose Stream)
Shaft wall coming off oven

H – Rating (Hose Stream)
Shaft wall assembly red hot
Shaft wall exposed side
1800 deg F

H – Rating (Hose Stream)
Hose stream completed

H – Rating (Hose Stream)
• Exposed side after cycle,
burn, and hose stream
• Non-exposed side after fire
and hose stream

Joint System Details
• The joint system details will provide a specification of approved
materials which can be used in the specific listing and the
required manner in which they are to be installed
• Materials which are specified in the Joint System section if
necessary are:
1) Forming Materials
2) Fill, Void, Cavity Materials
Joint

IBC 2006 – 713.6 Fire-resistant resistant Joint
Systems In Smoke Barriers
New Standard as of 2006
• Fire-resistant joint systems in smoke barriers shall be tested in
accordance with the requirements of UL 2079 for air leakage.
The air leakage rate of the joint shall not exceed 5.0 cfm per
lineal foot (0.00775 m3/slm) of joint at .30 inch (7.47 Pa) of
water for both the ambient temperature and elevated
temperature tests.

Optional L- Rating (Air Leakage)
• Measurement on non-fire exposed assembly of the air
leakage rate through a fire stop system or fire-resistive joint
system, tested under a differential pressure of 0.30 inches of
water column (75 Pa) at both 75 and 400 degrees Fahrenheit.
The rate is expressed as a volumetric flow rate in units of
cfm/lft.
• Assembly is cycled to level listed on individual listings
• Assembly is then opened to max. capable opening based on
movement ratings
• Leakage measured at ambient (room temperature or 75 deg
Fahrenheit)
• Leakage measured at elevated temperature of 400 deg F
• Rating calculated as CFM/lft (cubic feet per minute/ lineal
feet of joint)

UL Listing Example
• System No. HW-D-0420
• Assembly Rating – 1 and 2 Hr (See Item 2)
• L Rating at Ambient – Less than 1 CFM/Lin Ft
• L Rating at 400 deg F – Less than 1 CFM/Lin Ft
• Nominal Joint Width – ½ to 1 In. (See Item 2A)
• Class II and III Movement Capabilities – 100% Compression or
Extension
• Cycled at a level III
• Achieves the lowest leakage rate of “Less than 1”
• Rating is includes assemblies using any of the alternate
approved materials referenced in listing

Head of Wall Joint Protection System
This course will now cover the more commonly used materials
to protect head of wall joints providing a rated joint in wall
partitions:
• Caulk/spray
• Drywall
• Fire proofing
• Steel intumescent fire stop
Joint

Caulks/Sprays
• Fire rated caulks and sprays
typically have intumescent
and elastomeric properties
that allow for some range of
elongation and
compression
• Products are brand specific
and the amount of elasticity
and intumescent properties
are based on individual
formulations
• These products are applied in uncured “wet” state and can
be used in the Head of Wall gap or applied over a backing
material such as mineral wool or foam backing rod

Caulk/Spray Advantages
• Many brand formulations to choose from
• Product can be applied by:
– Spray on
– Caulk tube application
– Trowel applied
• Elastomeric properties p allow for some amount of movement
(see manufacturer’s recommendation)
• Intumescent properties expand material when exposed to
flame or high temperatures to create a seal form heat,
flame, and air passage

Caulk/Spray Advantages
• Helps in retention of flute fill materials from dislodging from
overhead flutes or head of wall gaps during fire hose stream
application
• Applied in accordance with manufacturer’s
recommendations these materials provide a good air
leakage seal
• Can be applied to cover a variety of uneven surfaces

Caulk/Spray Disadvantages
• Typically requires a clean, dry, frost and oil free surface for
proper adhesion
• Formulation may be affected by extreme temperatures
• May experience fatigue (cracking, tearing, dislodging) during
life cycle
• May require additional “bond breaker” tape to be installed
on metal surfaces to avoid three sided adhesion increasing
installation costs
• Possible overspray onto “unintended” surrounding surfaces or
elements

Caulk/Spray Disadvantages
• Avoid three sided adhesion

Caulk/Spray Disadvantages
• Uneven application can result in under applied or excessive
amounts of material
• Restricted deflection capabilities
• Potential for adhesive, cohesive, or substrate failure when
movement occurs
• Limited it cyclical l capabilities
• Time to cure for effectiveness and odor free state

Caulk/Spray Disadvantages
• Avoid Displacement from Compression

Caulk/Spray Disadvantages
• Typical Failures of Joints Using Sealant

Drywall “Rips”
• Drywall rips can be installed in front of head of wall gaps to
provide fire protection of equivalent ratings as the wall
assembly
• Can be attached to common cold formed steel angle via
fasteners
• Drywall rip/angle assembly can then be positively attached to
structure with typical steel fasteners
• Typically requires similar amount and profiles of gypsum panels
used to achieve rating of wall assembly

Drywall Rip Advantages
• Gypsum materials are readily available
• Cold formed steel angles typically available
• Positive attachment of the Drywall rip/Angle assembly to the
structure
• Sound Transmission reduction

Drywall Disadvantages
• Labor required to “rip” or cut down to size gypsum sheets
• Labor to install gypsum to cold formed steel angles typically
8” O/C with fasteners
• Fasteners extending into the Head of Wall gap degrading top
of wall sheathing during cyclical movement
• Potential ti gaps at construction ti joints of drywall rips
• Will still require installation of and additional materials to hold
mineral wool in flutes above the wall assembly
• No current listed system with “L-rating”

Angle Mesh with Fire Proofing
• Metal angle “mesh” profile
which can be installed in
front of head of wall gaps
and coated with fire
proofing materials
• Fire proofing materials could
be cement based
• Fire proofing materials could
be fiber based

Advantages of Angle Mesh/Fire
Proofing
• Angle mesh profile is positively attached to the overhead
structure
• Angle mesh profile provides a “keyed” surface aiding in
holding fire proofing materials in place
• Fire proofing materials can be sprayed on covering the angle
mesh and filling overhead flutes at the same time
• Head of wall gap behind angle mesh provides 100%
movement capabilities

Disadvantages of Angle
Mesh/Fire Proofing
• Angle Mesh and Fire proofing provide a rigid joint system and
cycle of the structure may crack and displace fire proofing
materials
• No expansion of joint materials during fire exposure to fill all
gaps and cracks
• Currently no UL leakage rating on joint assembly
• Overspray of fire proofing onto wall and surrounding
mechanical, electrical, or plumbing installations
• Machinery needed to pump and spray install the materials

“Shoulder” Track Profile And Systems
Utilizing Drywall Rips
• Shoulder track profile which provides a “shoulder” to attach
drywall rips covering the head of wall gap
• Multiple pieces of metal profiles or drywall rips installed to
Multiple pieces of metal profiles or drywall rips installed to
create a “shoulder” for drywall rip attachment in front for
head of wall gaps

Advantages Of “Shoulder”
Drywall Rip Installation
• Drywall materials are readily available and can be cut
down and used for “rips” in front of head of wall gap
• Head of wall gap doesn’t require any fill materials allowing
for unencumbered movement
• Allow for large amounts of uncompromised deflection
• Reduces sound transmission through the head of wall joint

Disadvantages Of “Shoulder”
Drywall Rip Installation
• Shoulder tracks need to be formed to accommodate wall
size, fire rating, and deflection movement
• Installation of differing wall widths, fire ratings, and
deflection requirements require multiple track or material
profiles
• Labor to install drywall rips with a screw attachment every 3”
OC both sides
• Multiple layers and build up (i.e. for 2 hour rating) requires
additional ii fasteners and labor to install 2 drywall rips per side

Disadvantages Of “Shoulder”
Drywall Rip Installation
• No expansion of materials to seal gaps or cracks when
exposed to fire
• Labor to install caulks which are still required between the
drywall rips and contour of overhead structure
• Drywall rips need to be additionally contour cut to provide
flute fill retention
• Possible “construction joints” at the intersection of drywall rips
requiring additional materials for sealing against air leakage,
flame, and thermal passage

Track With Fire Proofing Fill
• Track profile shape that is U-shaped and incorporates the use
of plastic bags and fire proofing
• Track is attached to the overhead structure via fasteners
through return flanges on both sides of u-shape
• Plastic bags are inserted into the u-shape having connections
that allow for fire proofing to be pumped into the bag
assemblies

Advantages Of Track With Fire Proof Fill
• The entire assembly can be installed and filled before
mechanical, electrical, or plumbing installation
• Bag inserts allow for fill of overhead flutes and holds fire
proofing in place
• Allows for unencumbered head of wall joint
• No additional materials are required to provide flute fill
retention
• Provides sound reduction through the head of wall joint
• Head of wall materials are not stressed by cyclical movement
of the structure

Disadvantages Of Track
With Fire Proof Fill
• Track profile and required components (plastic bags, hose
connections, pumps, and sealer) can be expensive
• Labor required to install the profile with bags inserted and to
pump them full can be extensive
• Pinched bags may not fill properly affecting the fire stopping
or smoke propagation abilities of the system
• No expansion capabilities to fill cracks or voids during fire
• Custom lengths require modified bags and sealing machine
to create sealed bags

The Solution: Steel
Intumescent Fire Stops
• Joint Protection
• Can be installed as wall is “topped out”
• Can be installed before MEP’s
• Requires only same fasteners used for track every 24” O/C
• Can be installed during track installation
ti
• Eliminates sealant over application, build up, overspray and
materials “left in machine, hose, or tube” (unaccounted
waste)
• Eliminates i under application and rework
• Provides “flute fill” retention eliminating labor to install
caulks/sprays or flute plates
• Eliminates materials and labor to “castle cut” or rip drywall for
use to protect joints or flutes

Steel Intumescent Fire Stops
The flexibility of the Steel Intumescent Fire Stop product is used to
protect dynamic joints in both standard cold formed
steel/gypsum and CMU/block walls. The unique design provides
superior movement capabilities while eliminating any
requirement for fire caulk, spray, flute plates, drywall rips, or
contour drywall cuts throughout head of wall joint assemblies.
The simple design provides
a positively attached fire
stopping that allows for
100% unencumbered
movement experiencing no
fatigue during life of the
assembly.

Joint Protection Using A Steel
Intumescent Fire Stop
• Metal profile shaped to allow for adhesion of a cured
intumescent material
• Composite assembly is installed in front of head of wall gaps

Advantages Of Composite
Metal/Intumescent Joint Protection Materials
• Composite assembly is positively attached to the structure
• Design of the metal profile allows for unencumbered
movement of the wall assembly
• Cured intumescent is protected from degradation due to
cyclical movement and is held in place via the metal profile
• No fatigue to the system for the
assembly life cycle

Advantages Of Composite
Metal/Intumescent Joint Protection Materials
• Accommodates large amounts of deflection with smaller
nominal gaps
• UL listings provide the lowest leakage rating possible
• One profile provides consistent amount of active ingredient
for both 1 and 2 hour assemblies
• Aid in flute fill retention with no additional materials required

Disadvantages Of Composite
Metal/Intumescent Joint Protection Materials
• Potential “construction gaps” at intersecting joints requiring
additional caulk for ambient air leakage
• Build up outside the head of wall joint may interfere with
Build up outside the head of wall joint may interfere with
exposed finished applications

Steel Intumescent Fire Stops
• The Following Slides Contain Details Of Steel Intumescent
• The Following Slides Contain Details Of Steel Intumescent
Fire Stops As Used In Different Construction Methods

Under Slab Assembly with Steel
Under Slab Assembly with Steel
Intumescent Fire Stop

Perpendicular To Fluted
Perpendicular To Fluted
Metal Deck With Concrete Fill

Parallel To Fluted
Parallel To Fluted
Metal Deck With Concrete Fill

Parallel To Fluted Deck
Parallel To Fluted Deck
With An Offset Wall

Parallel To Fluted Deck
Parallel To Fluted Deck
Centered Under Valley

Centered under Structural
Centered under Structural
Steel Support (Example I-Beam)

Full Height Parallel to
Full Height Parallel to
Structural Steel Support

CMU Block Wall

Design Considerations Of Dynamic Joint
Protection In Fire Rated Assemblies
Good design practices take into consideration a number of
factors when specifying dynamic joint protection
• Deflection requirements
• Cyclical movement
• Thermal protection
• Air leakage
• Fatigue of joint systems
• Attachment of joint systems

Deflection and Cyclical Movement
To ensure effective fire rated partitions one needs to consider
the cyclical rating, amount of deflection capability, and post
construction movement a structure will experience during it’s
life cycle
Items to consider:
• Environmental forces / Geographic location (zones)
– Earthquake
– Tornado
– Hurricane
– Thermal
– Wind sway
• Live load and frequency of movement
• Dead load

Joint Material Properties
In specifying joint protection one should consider the material
properties and how they factor in the installation and
continued protection on fire rated assemblies
Several factors to also consider:
• Thermal protection provided (1 and 2 hour)
• Certified leakage ratings of joint system
• The attachment t or adhesion of the fire stop materials
• The elasticity (compression and extension capabilities) of
the joint materials
• Fill, Void, or cavity material (expansion capabilities)
• Longevity of materials
• Environmental conditions affecting materials

Course Objectives
The Design Professional will now be able to:
• Explain what a Head of Wall joint is
• Describe what constitutes a Head of Wall assembly
• Explain what information is contained in the heading of a UL
listed assembly
• Explain how the four standards are measured to determine UL
2079 approval
• Determine the deflection capacity of joint treatments
t t
• Explain the hourly rating of joint treatments
• Explain what comprises the L-rating of joint treatments
• List the joint treatment types and what the
advantages/disadvantages of each are
• Describe what Architect, Engineer, and Specification
professionals consider when specifying protection of dynamic
or static head of wall joints

Course Sponsor
Dynamic and Static
Head-of-Wall Joint Fire Protection
California Expanded Metal
Company
263 North Covina Lane
City of Industry, CA 91744
Phone
425-591-4174
Dynamic and Static Head-of-Wall Joint Fire Protection
E-mail
arosin@cemcosteel.comcom
Web
www.cemcosteel.com
Course Number
CEM05A
Please note: you will need to complete the conclusion
quiz online at ronblank.com to receive credit
An AIA Continuing Education Program
Credit for this course is 1 AIA/CES HSW Learning Unit