Patent Publication Number: US-2019177970-A1

Title: Systems and methods for assisting in reducing the spread of fire, smoke or heat in a building

Description:
This application is a divisional of U.S. patent application Ser. No. 16/008,117, filed Jun. 14, 2018, which is a continuation of U.S. patent application Ser. No. 15/191,993, filed Jun. 24, 2016, and entitled “Systems and Methods for Assisting in Reducing the Spread of Fire, Smoke or Heat in a Building” which claims priority to U.S. Provisional Patent Application Ser. No. 62/389,856, filed on Mar. 11, 2016 and entitled “Intumescent Fire Block Head of Wall Assemblies” and 62/391,984, filed on May 16, 2016 and entitled “Intumescent Fire Block Head of Wall Assemblies”, all of which are hereby incorporated by reference herein in their entireties. 
    
    
     FIELD OF THE DISCLOSURE 
     The present disclosure relates generally to system and methods designed to reduce or prevent the spread of fire, smoke or heat at head-of-wall ceiling joints. 
     BACKGROUND 
     “Head-of-wall” ceiling joints are the connection points existing between a building wall and the ceiling. Normally, it is necessary to provide space between the top of the wall and the ceiling to allow for movement of the building. However, the open space or gap at the top of the wall can be a location where fire, smoke and heat spread. In order to contain the spread of smoke and fire, a fire resistant material (e.g. mineral wool) is sometimes placed in the space and a fire-resistant coating sprayed onto the exposed mineral wool. If the space or gap is small enough, a fire-resistant caulk may be used to help fill the gap. These techniques are believed to have disadvantages. For example, these methods are often labor intensive and therefore can be expensive. 
     Attempts have been made to include fire-blocking materials in the head-of-wall assembly itself. An example of a fire block material sometimes used is intumescent material. Intumescent material typically expands up to many times its original size upon exposure to heat and/or fire and form a char that is fire resistant. However, past attempts at including fire-blocking materials in the head-of-wall assemblies are believed to have disadvantages. For example, various past attempts to add intumescent materials to head-of-wall assemblies have resulted in rubbing between the wallboard and the intumescent material, causing the intumescent material to wear-off or become dislodged. 
     It should be understood that the above-described features, capabilities and disadvantages are provided for illustrative purposes only and are not intended to limit the scope or subject matter of the appended claims or those of any related patent application or patent. Thus, none of the appended claims or claims of any related application or patent should be limited by the above discussion or construed to address, include or exclude each or any of the above-cited features, capabilities or disadvantages merely because of the mention thereof herein. 
     Accordingly, there exists a need for improved systems, articles and methods useful in connection with reducing the spread of fire, smoke or heat between adjacent rooms at the head-of-wall ceiling joints having one or more of the attributes or capabilities described or shown in, or as may be apparent from, the various portions of this patent application. 
     BRIEF SUMMARY OF THE DISCLOSURE 
     In some embodiments, the present disclosure involves a system for assisting in reducing the spread of fire between adjacent rooms in a building proximate the ceiling(s) thereof. The rooms are separated by a wall having at least one vertical wall board coupled to a plurality of vertical studs. Each wall board and vertical stud has upper and lower ends. The system includes an elongated header track having a base configured to be coupled to the ceiling and first and second spaced-apart flanges extending downwardly therefrom. The upper end of each vertical stud extends between the flanges and is spaced downwardly from the base of the header track to form a space therebetween and allow for relative movement between the wall and the ceiling. The upper end of each wall board abuts the outer side of one of the flanges and is spaced downwardly from the ceiling to form a gap therebetween and allow for relative movement between the wall and the ceiling. 
     At least one elongated filler constructed at least partially of compressible or elastic material is configured to be compressed into the gap formed between at least one wall board and the ceiling. Each filler is configured to expand and contract as the wall and ceiling move relative to one another during normal, typical or expected use of the building to at least substantially fill the gap. The elongated filler has at least one elongated slit or cavity formed therein and which extends at least partially through the length thereof. At least one fire-blocker constructed at least partially of fire retarding material is disposed within the slit(s) or cavity(ies) formed in each filler. The fire-blocker is substantially surrounded by the associated filler to protect the fire-blocker from at least substantial direct exposure to sunlight, moisture and ambient air from the adjacent room. 
     In various embodiments, the present disclosure involves a system for assisting in reducing the spread of fire between adjacent rooms in a building proximate the ceiling(s) thereof. The rooms are separated by a wall having at least one vertical wall board coupled to a plurality of vertical studs. The system includes an elongated header track having a base configured to be coupled to the ceiling and first and second spaced-apart flanges extending downwardly therefrom. The upper end of each vertical stud extends between the flanges and is spaced downwardly from the base of the header track to form a space therebetween and allow for relative movement between the wall and the ceiling. The upper end of each wall board abuts the outer side of one of the flanges and is spaced downwardly from the ceiling to form a gap therebetween and allow for relative movement between the wall and the ceiling. 
     At least one layer of elongated filler constructed at least partially of compressible or elastic material is configured to be disposed within at least one gap formed between at least one wall board and the ceiling. At least one layer of fire-blocker constructed at least partially of fire retarding material is disposed adjacent to and in layered relationship with the at least one layer of elongated filler. 
     Accordingly, the present disclosure includes features and advantages which are believed to enable it to advance building construction technology. Characteristics and advantages of the present disclosure described above and additional features and benefits will be readily apparent to those skilled in the art upon consideration of the following detailed description of various embodiments and referring to the accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The following figures are part of the present specification, included to demonstrate certain aspects of various embodiments of this disclosure and referenced in the detailed description herein: 
         FIG. 1  is a cross-sectional view of an embodiment of a fire-retarding system in accordance with the present disclosure; 
         FIG. 2  is an isolated cross-sectional view of the exemplary elongated filler and fire-blocker arrangement shown in  FIG. 1 ; 
         FIG. 3A  is an isolated cross-sectional view of another embodiment of an elongated filler and fire-blocker arrangement in accordance with the present disclosure; 
         FIG. 3B  is an isolated cross-sectional view of the exemplary elongated filler and fire-blocker arrangement of  FIG. 3A  shown disposed in a gap between an exemplary wall board and ceiling; 
         FIG. 4  is an isolated cross-sectional view of another embodiment of an elongated filler and fire-blocker arrangement in accordance with the present disclosure; 
         FIG. 5  is an isolated cross-sectional view of another embodiment of an elongated filler and fire-blocker arrangement in accordance with the present disclosure; 
         FIG. 6  is an isolated cross-sectional view of another embodiment of an elongated filler and fire-blocker arrangement in accordance with the present disclosure; 
         FIG. 7  is a cross-sectional view of another embodiment of a fire-retarding system in accordance with the present disclosure; 
         FIG. 8  is a cross-sectional view of another embodiment of a fire-retarding system in accordance with the present disclosure; and 
         FIG. 9  is a cross-sectional view of another embodiment of a fire-retarding system in accordance with the present disclosure. 
     
    
    
     DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS 
     The present invention now will be described more fully hereinafter with reference to the accompanying drawings, in which at least some preferred embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Like numbers refer to like elements throughout. 
     Characteristics and advantages of the present disclosure and additional features and benefits will be readily apparent to those skilled in the art upon consideration of the following detailed description of exemplary embodiments of the present disclosure and referring to the accompanying figures. It should be understood that the description herein and appended drawings, being of example embodiments, are not intended to limit the claims of this patent application or any patent or patent application claiming priority hereto. On the contrary, the intention is to cover all modifications, equivalents and alternatives falling within the spirit and scope of this disclosure or any appended claims. Many changes may be made to the particular embodiments and details disclosed herein without departing from such spirit and scope. 
     In showing and describing preferred embodiments in the appended figures, common or similar elements are referenced with like or identical reference numerals or are apparent from the figures and/or the description herein. The figures are not necessarily to scale and certain features and certain views of the figures may be shown exaggerated in scale or in schematic in the interest of clarity and conciseness. 
     As used herein and throughout various portions (and headings) of this patent application, the terms “invention”, “present invention” and variations thereof are not intended to mean every possible embodiment encompassed by this disclosure or any particular claim(s). Thus, the subject matter of each such reference should not be considered as necessary for, or part of, every embodiment hereof or of any particular claim(s) merely because of such reference. The terms “coupled”, “connected”, “engaged” and the like, and variations thereof, as used herein and in the appended claims are intended to mean either an indirect or direct connection or engagement. Thus, if a first device couples to a second device, that connection may be through a direct connection, or through an indirect connection via other devices and connections. 
     Certain terms are used herein and in the appended claims to refer to particular components. As one skilled in the art will appreciate, different persons may refer to a component by different names. The use of a particular or known term of art as the name of a component herein is not intended to limit that component to only the known or defined meaning of such term (e.g. bar, connector, rod, cover, panel, bolt, screw, pin). Further, this document does not intend to distinguish between components that differ in name but not function. Also, the terms “including” and “comprising” are used herein and in the appended claims in an open-ended fashion, and thus should be interpreted to mean “including, but not limited to. . . . ” Further, reference herein and in the appended claims to components and aspects in a singular tense does not necessarily limit the present disclosure or appended claims to only one such component or aspect, but should be interpreted generally to mean one or more, as may be suitable and desirable in each particular instance. 
     As used herein, the terms “elongated” and variations thereof mean having an average length that is greater than its average width. As used herein, the terms “substantially”, “generally” and variations thereof means and includes (i) completely, or 100%, of the referenced parameter, variable or value, and (ii) a range of values less than 100% based upon the typical, normal or expected degree of variation or error for the referenced parameter, variable or value in the context of the particular embodiment or use thereof, such as, for example, 90-100%, 95-100% or 98-100%. 
     Referring initially to  FIG. 1 , an embodiment of a fire retarding system  10  is shown. The exemplary fire retarding system  10  is useful for assisting in reducing the spread of fire, smoke or heat into adjacent rooms  12 ,  14  in a building  20  proximate to the ceiling(s)  26 , or at the head-of-wall ceiling joint  16 , of the rooms  12 ,  14 . The illustrated rooms  12 ,  14  are shown separated by a wall  30  having at least one vertical wall board  36  coupled to a plurality of vertical studs  40 . The exemplary system  10  include at least one elongated, U-shaped, header track  46  having a base  50  configured to be coupled to the ceiling  26  with one or more connectors  52 , such as bolts, tacks, nails, screws, pins etc. as is and becomes further known. In many embodiments, the base  50  may be rigidly connected to and/or abut the ceiling  26 . 
     The illustrated header track  46  also includes first and second spaced-apart flanges  54 ,  58  extending vertically downwardly from the base  50 . Each illustrated flange  54 ,  58  includes an inner side  62 , and an outer side  66 . A present commercially available example of a component that may be used as the header track  46  in some embodiments of the present disclosure is the “MaxTrack” by Clark Dietrick Building Systems. 
     In this embodiment, the upper end  42  of each vertical stud  40  extends between the flanges  54 ,  58  of the header track  46  and abuts the respective inner sides  62  thereof. At the same time, the upper end  40  of each vertical stud  40  is spaced downwardly from the base  50  of the header track  46 , forming a space  64  therebetween. Since the illustrated vertical studs  40  are not rigidly coupled to the header track  46 , the spaces  64  allow for relative movement between the wall  30  and the ceiling  26  (and potentially other components), and/or for any other suitable purpose. The exemplary wall board(s)  36  are coupled to the studs  40  below the header track  46  with connectors  38 , such as bolts, tacks, nails, screws, pins etc. as is and becomes further known. In this embodiment, each wall board  36  abuts the outer side  66  of the respective adjacent flange  54 ,  58  and is also spaced downwardly from the ceiling  26  to form a gap  68  therebetween (See also  FIGS. 8-9 ). In other embodiments, the wall board  36  may not abut the outer side of the adjacent flange  54 ,  58 . The illustrated gap  68  allows for relative movement between the wall  30  and the ceiling  26  (and potentially other components), and/or for any other desired purpose(s). 
     Still referring to the embodiment  FIG. 1 , the exemplary system  10  also includes at least one elongated filler  78  and at least one fire-blocker  90  disposed within each gap  68  formed between each wall board  36  and the ceiling  26 . The filler  78  and fire-blocker  90  may have any desired purpose. For example, in some embodiments, the filler(s)  78  may help at least partially fill the gap(s)  68  to assist in preventing or reducing unwanted sound and air flow migration between the adjacent rooms  12 ,  14  through the gap(s)  68 . In many embodiments, in the case of a fire in the building  20 , the filler(s)  78  and/or fire-blocker(s)  90  may assist in preventing or reducing the migration of smoke, fire or heat between the rooms  12 ,  14  through the gap(s)  68 . For another example, in some embodiments, the filler  78  may at least partially assist in shielding or protecting the associated fire-blocker (s)  90  from degradation, such as due to direct exposure to sunlight, moisture and/or ambient air. However, in some embodiments, the system  10  may not include any filler  78 , but only the fire-blocker  90  or may alternate between configurations of fire-blocker  90  with and without the filler  78  in any desired arrangement. 
     The elongated filler  78  and fire-blocker  90  may have any suitable form, configuration, construction and operation. For example, in some embodiments, the filler  78  may be constructed at least partially of compressible and/or elastic material and configured to be compressed (e.g. squeezed or stuffed) into the gap  68  so that it will expand as the gap  68  grows in size and contract as the gap  68  shrinks in size throughout normal, typical or expected relative movement between the wall(s)  30  and ceiling(s)  26  during use of the building  20  to at least substantially fill the gap  68  at all times. For example, the filler  78  may be in the form of a foam or sponge constructed of elastomeric material, such as polyethylene, polystyrene, polypropylene or polyurethane. The filler  78  may be constructed of material that is organic or inorganic, or a combination of both. A few present commercially available examples of material that may be used as the elongated filler  78  in some embodiments are the “Mormflex” and “OCFoam” by Nomaco Engineering Foam Solutions. In other embodiments, the filler  78  may only partially fill the gap  68 . 
     Referring now to  FIG. 2 , the exemplary elongated filler  78  may have any desired cross-sectional shape. In the illustrated embodiment, the filler  78  has a generally rectangular cross-sectional shape. However, in other embodiments the filler  78  may have a square, circular, oval, hexagonal or other cross-sectional geometric configuration or shape. 
     Still referring to  FIG. 2 , the exemplary fire-blocker  90  may be constructed at least partially of any desired, suitable fire retarding material. As used herein, the terms “fire retarding” and variations thereof mean having the capability to stop or reduce the spread of fire, decrease heat or smoke generated by fire or increase char formation. For example, the fire-blocker  90  may be constructed at least partially of intumescent material that swells or expands upon exposure to heat. For example, in some embodiments, the intumescent material may swell to at least about two times its original volume at about 100° C. For another example, in various environments, the intumescent material may swell up by a factor of  100  upon being exposed to heat between about 150° C. to about 200° C. One presently commercially available intumescent material that can be used as the fire-blocker  90  in some embodiments in the “BlazeSeal” by the present applicant, The Rectorseal Corporation. If desired, the fire-blocker  90  may be constructed of a mixture of one or more intumescent materials and one or more non-intumescent materials. In other embodiments, the fire-blocker  90  may include a mixture of two or more intumescent materials or a mixture of two or more non-intumescent materials. For yet another example, the fire-blocker  90  may include intumescent or other fire retarding material sprayed onto or into, or applied as a coating or affixed with adhesive or mechanical fastener(s) (e.g. nails) to, one or more other materials or components, such as the filler  78 . 
     In some embodiments, the fire-blocker  90  may be infused into the filler  78  so that it is not a separate component. The filler  78  would thus have fire-blocking capabilities. For example, intumescent fire-blocker material may be infused into a foam filler  78 . One presently commercially available intumescent-infused foam material useful in some embodiment of the system  10  is the “NORSEAL FS1000” series by Saint-Gobain Performance Plastics. If desired, multiple layers of fire-blocking infused filler  78  may be stacked together, such as with the use of an adhesive. One example of a presently commercially available adhesive that may be useful to affix the aforementioned layers together is the “3M Foam &amp; Fabric  24  Spray” adhesive by 3M. 
     The fire-blocker  90  may have any desired shape and configuration. For example, the fire-blocker  90  may include one or more elongated portions (e.g. strips, sticks), one or more non-elongated portions (e.g. patches or squares), or a combination thereof. 
     Referring again to  FIGS. 1-2 , the fire-blocker  90  and filler  78  may be arranged in the gap(s)  68  in any suitable manner and configuration. For example, the filler  78  may at least partially surround or encapsulate the fire-blocker  90  in the gap  68 . This sort of configuration may be used for any desired purpose, such as to reduce the quantity of fire-blocker  90  used or needed in the system  10 . This may be advantageous for cost-efficiency, such as when the material used for the fire-blocker  90  is more expensive than the material used for the filler  78 . For another example, when the filler  78  at least partially surrounds or encapsulates the fire-blocker  90 , the filler  78  may at least partially or substantially shields or insulate the fire-blocker  90  from direct contact with UV light, moisture and/or ambient air from the adjacent room(s)  12 ,  14 , which may degrade the fire-blocker  90  and reduce its fire-retarding capabilities. In some embodiments, the filler  78  may entirely surround the fire-blocker  90 , while, in other embodiments, the filler  78  may only partially surround the fire-blocker  90 . In some instances where the filler  78  fully or partially surrounds the fire-blocker  90 , fire or heat contacting the filler  78  may cause at least part of the filler  78  to burn away, exposing the fire-blocker  90  so that it will perform as intended. In other instances, the fire-blocker  90 , even though surrounded by the filler  78 , may still be activated by the heat or fire to perform as intended (e.g. to assist in preventing or reducing the migration of smoke, fire or heat between the rooms  12 ,  14  through the gap(s)  68 ). 
     The fire-blocker  90  may be at least partially surrounded or encapsulated by the filler  78  in the gap  68  in any suitable manner. In this embodiment, the elongated filler  78  includes one or more internal slits, or cavities,  80  within which the fire-blocker(s)  90  are contained. The terms “slit” and “cavity” are used interchangeably herein in this context because the filler  78  may be constructed of a flexible material in which a “cavity” is not easily formed or would effectively collapse until something were placed inside it. In such instances, a mere “slit” cut into the filler  78  along a longitudinal axis  84  thereof may suffice at effectively forming a cavity around the fire-blocker(s)  90  when it is placed therein. In the illustrated embodiment, the cavity  80  extends substantially through the length of the filler  78 . The exemplary fire-blocker  90  is elongated and completely surrounded by the filler  78 . In other embodiments, one or more cavities  80  may extend through only one or more desired portions of the filler  78 , the fire-blocker  90  may not be elongated, the filler  78  may only partially, or not, surround the fire-blocker  90  or a combination thereof. 
     The exemplary fire-blocker(s)  90  may be inserted into the cavity(ies)  80  in the filler  78  in any suitable manner. For example, one or more elongated fire-blockers  90  may be inserted into the cavity  80  at one or both ends of the filler  78 . In some embodiments, one or more slits or openings may extend from the cavity  80  to a side of the filler  78  to allow insertion of the fire-blocker  90  therethrough and into the cavity  80 . For example, an opening may be formed in the outer side  96  of the filler  78  and extending inwardly to the cavity  80  so that the fire-blocker  90  may be inserted therethrough. Note, the outer side  96  of the filler  78  is the side farthest from the header track  46 . For yet another example, the fire-blocker  90  may be intumescent material that is injected in a flowable state into the cavity  80 . It should be noted, however, the manner of insertion of the fire-blocker  90  into the cavity  80  is not limiting upon the present disclosure or any of the appended claims or claims of any related patent or patent application, except and only to the extent as may be expressly recited in a particular claim and only for that claim and any claims depending therefrom. 
     Still referring to  FIGS. 1-2 , in this embodiment, the filler  78  and fire-blocker  90  are provided in the gaps  68  formed between vertical wall boards  36  and the ceiling  26  on both sides  47 ,  48  of the header track  46 . However, in other embodiments, the filler  78  and fire-blocker  90  may be provided in the gap(s)  68  formed between vertical wall boards  36  and the ceiling  26  on only one side  47 ,  48  of the header track  46 , provided in alternating fashion from side to side  47 ,  48  along the wall(s)  30  or any other desired configuration. 
     Referring now to  FIG. 3A , in other embodiments, the fire-blockers  90  may not be enclosed in slits, or cavities,  80  (e.g.  FIG. 2 ) formed in the filler  78 . In this particular example, the illustrated fire-blocker  90  and elongated filler  78  are shown in a stacked or layered relationship. Two elongated sheets, or strips,  94  of fire-blockers  90  are shown sandwiched between three elongated sections  82  of filler  78 , respectively. While the exemplary sections  82  of filler  78  cover (and thus at least partially shield) the top and bottom of each illustrated strip  94  of fire-blocker  90 , the sides of the fire-blocker strips  94  are initially shown exposed. However, as represented in  FIG. 3B , once the illustrated sections  82  of filler  78  are compressed in the gap  68  between the top of the vertical wall board  36  and the ceiling  26 , the sides of the sections  82  collapse at least partially, substantially, or completely around the side edges of the exemplary sheets  94  of fire-blocker  90 , assisting in at least partially surrounding, or encapsulating, and shielding them. 
     Any desired number of layers or other configuration of fire-blockers  90  and fillers  78  may be used. There may be one, two, three, four, five, six or more layers of fire-blocker  90  and/or filler  78  or any combination thereof (e.g. three layers of fire-blocker  90  and four layers of filler  78 , six layers of filler  78  and seven layers of fire-blocker  90 , etc.). For example,  FIG. 4  illustrates one strip  94  of fire-blocker  90  sandwiched between two sections  82  of filler  78 , which will surround the strip  94  similarly as shown and described with respect to the embodiment of  FIGS. 3A-B  if compressed into the gap  68 . In other embodiments, such as shown in  FIGS. 5  and  6 , the fire-blocker  90  may be positioned external to, or outside of, the filler  78 . In  FIG. 5 , distinct layers of fire-blocker  90  (e.g. sheets  94 ) are shown positioned on the top and bottom of the filler  78 . In this example, if the illustrated filler  78  is compressed into the gap  68 , the sides of the filler  78  may still at least partially collapse around the side edges of the fire-blocker sheets  94  to completely or at least substantially surround them. 
     In some embodiments, all or part of the fire-blocker  90  may not be surrounded, encapsulated or shielded by the filler  78 . For example, in  FIG. 6 , the fire-blocker  90  includes one or more layers that at least partially surround the filler  78 . If desired, the fire-blocker  90  may form a skin  92  around the filler  78 , such as by being sprayed on or affixed with adhesive (See also  FIGS. 8-9 ). 
     It should be noted that any layer or section of fire-blocker  90  (e.g. strip  94 ) or filler  78  (e.g. section  82 ) may itself include multiple layers. For example, the filler  78  in  FIG. 5  is constructed of three layers, or sections,  82 . 
     The exemplary filler  78  (and fire-blocker  90 ) may entirely, or only partially, initially and/or subsequently fill the associated gap  68 . In the embodiment of  FIGS. 1-3B , for example, the filler  78  is configured to be squeezed or stuffed into the gap  68  so that it expands and will hopefully substantially, or entirely, fill the gap  68  and maintain that relationship during use of the building  20 . In contrast, in the embodiments of  FIGS. 8 and 9 , the filler  78  and fire-blocker  90  are designed, at least initially, not to fill the gap  68 . As shown, the exemplary filler  78  and fire-blocker  90  initially only partially fill the gap  68 . For example, the system  10  may be configured so that the fire-blocker  90  will expand if exposed to fire or heat and at that time at least partially or substantially fill the gap  68  to assist in preventing further migration of fire, smoke or heat. 
     Still referring to  FIGS. 8-9 , the filler  78  and fire-blocker  90  may be installed in the gap  68  to initially partially fill the gap in any suitable manner. For example, the filler  78  and/or fire-blocker  90  may be affixed to the ceiling  26  (e.g.  FIG. 8 ), the top of the adjacent wall board  36  (e.g.  FIG. 9 ) or the adjacent side protector  100  (if included) as will be described further below, such as with connectors (e.g. nails), adhesive, other suitable mechanism or a combination thereof. In the illustrated embodiments, the fire-blocker  90  has adhesive on its outer surface (and potentially also on its inner surface). Since the exemplary fire-blocker  90  is provided on the outside of the filler  78 , the fire-blocker  90  may be adhered to the ceiling  26  (e.g.  FIG. 8 ) or the top of the adjacent wall board  36  (e.g.  FIG. 9 ) via adhesive. 
     In other embodiments, only the fire-blocker  90  may be provided in the gap(s)  68  or a combination of only fire-blocker  90  and filler  78 /fire-blocker  90  configurations may be provided at different locations (e.g. on opposites sides of the header track  46 ) as desired. For example, when only fire-blocker  90  is included, the fire-blocker  90  may take the form of intumescent strips that can be adhered, nailed or otherwise coupled to the ceiling  26  or the top of the adjacent wall board  36 , similarly as the filler  78 /fire-blocker  90  configurations shown in  FIGS. 8 &amp; 9 . 
     In yet other embodiments, the filler  78 /fire-blocker  90  combinations or only fire-blocker  90  may be placed atop the top of the adjacent wall board  36 , or placed or friction fit in the gap  68  or a portion thereof, without being affixed or coupled to any other component. 
     Referring now to  FIG. 7 , in another independent aspect of the present disclosure, the fire retarding system  10  may include one or more elongated side protectors  100  to assist in shielding or protecting the filler(s)  78  and/or the fire-blocker(s)  90 , provide support for the filler(s)  78  and/or the fire-blocker(s)  90  or other components, prevent the filler(s)  78  and/or the fire-blocker(s)  90  or other components from falling out of the gap  68 , provide an additional barrier to fire, smoke and heat migration between the adjacent rooms  12 ,  14  proximate to the ceiling(s)  26 , provide aesthetic enhancement to the head-of-wall ceiling joint  16 , any other desired purpose or a combination thereof. 
     The side protector  100  may have any suitable form, configuration, construction and operation. For example, in some embodiments, the side protector  100  may be an elongated, substantially right-angled metallic member, such as a section of angle iron. In this embodiment, the side protector  100  includes a base  106  configured to be secured to the ceiling  26  proximate to the outer side  96  of the illustrated filler  78  and a leg  110  extending downwardly therefrom and covering the outer side  96  of the filler  78 . The exemplary base  106  is shown coupled to the ceiling  26  with one or more connectors  52 , such as bolts, tacks, nails, screws, pins etc. In many embodiments, the base  106  is rigidly connected to and/or abuts the ceiling  26 . 
     The exemplary leg  110  of the side protector  100  extends downwardly adjacent to the entire outer side  96  of the filler  78  and part of the adjacent wall board(s)  36 . In some embodiments, the leg  110  of the side protector  100  abuts and is flush with the outer side  96  of the filler  78  and/or exposed fire-blocker  90  (e.g.  FIGS. 8-9 ) and the wall board  36 . In other embodiments, the leg  110  of the side protector  100  may be in close proximity to, but not abut or be flush with, the wall board  36  and the outer side  96  of the filler  78  and/or exposed fire-blocker  90 . 
     When included, the side protector  100  may be provided on either or both sides  47 ,  48  of the header track  46 . In some embodiments, the side protector  100  may be formed with a predesigned profile and appearance to serve as a decorative component at the head-of-wall ceiling joint  16 . 
     An example cost-effective method of assembly of the layered embodiment of filler  78  and fire-blocker  90  shown in  FIG. 3A  will now be described. A first 1/16″ thick layer  90   a  of intumescent fire-blocker  90  is placed on the top surface of a first ½″ thick layer  78   a  of foam filler  78 . If desired, the first fire-blocker layer  90   a  can be affixed to the first filler layer  78   a , such as with adhesive. A second ½″ thick layer  78   b  of foam filler  78  is placed atop the first layer  90   a  of intumescent fire-blocker  90 . If desired, the second filler layer  78   b  can be affixed to the first fire-blocker layer  90   a , such as with adhesive. A second 1/16″ thick layer  90   b  of intumescent fire-blocker  90  is placed atop the top surface of the second filler layer  78   b . If desired, the second fire-blocker layer  90   a  can be affixed to the second filler layer  78   a , such as with adhesive. A third ½″ thick layer  78   c  of foam filler  78  is placed atop the second layer  90   b  of intumescent fire-blocker  90 . If desired, the third filler layer  78   c  can be affixed to the second fire-blocker layer  90   b , such as with adhesive. An example presently commercially available foam useful as filler layers  78   a - c  is the “Mormflex” foam by Nomaco Engineering Foam Solutions. An example presently commercially available intumescent material useful as fire-blocker layers  90   a - c  is the “BlazeSeal” by the present applicant, The Rectorseal Corporation. An example presently commercially available adhesive that may be useful to affix the aforementioned layers together is the “3M Foam &amp; Fabric  24  Spray” adhesive by 3M. 
     In accordance with all of the above embodiments, the exemplary fire retarding systems  10  is configured to protect the fire-blocker  90  from at least significant degradation, easy and quick to assemble and install, reliable, unlikely to become dislodged and cost-effective. 
     Having thus described in detail a preferred selection of embodiments of the present invention, it is to be appreciated and will be apparent to those skilled in the art that many physical changes could be made in the apparatus without altering the inventive concepts and principles embodied therein. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore to be embraced therein 
     Preferred embodiments of the present disclosure thus offer advantages over the prior art and are well adapted to carry out one or more of the objects of this disclosure. However, the present invention does not require each of the components and acts described above and is in no way limited to the above-described embodiments or methods of operation. Any one or more of the above components, features and processes may be employed in any suitable configuration without inclusion of other such components, features and processes. Moreover, the present invention includes additional features, capabilities, functions, methods, uses and applications that have not been specifically addressed herein but are, or will become, apparent from the description herein, the appended drawings and claims. 
     The methods that may be described above or claimed herein and any other methods which may fall within the scope of the appended claims can be performed in any desired suitable order and are not necessarily limited to any sequence described herein or as may be listed in the appended claims. Further, the methods of the present invention do not necessarily require use of the particular embodiments shown and described herein, but are equally applicable with any other suitable structure, form and configuration of components. 
     While exemplary embodiments of the invention have been shown and described, many variations, modifications and/or changes of the system, apparatus and methods of the present invention, such as in the components, details of construction and operation, arrangement of parts and/or methods of use, are possible, contemplated by the patent applicant(s), within the scope of any appended claims, and may be made and used by one of ordinary skill in the art without departing from the spirit or teachings of the invention and scope of this disclosure and any appended claims. Thus, all matter herein set forth or shown in the accompanying drawings should be interpreted as illustrative, and the scope of the disclosure and any appended claims should not be limited to the embodiments described and shown herein.