Abstract:
Various embodiments of the present invention are directed to a movement control screed that is structured for installation between first and second masonry coatings applied adjacent to a building wall. The movement control screed is structured as a control joint for absorbing movement between the first and second masonry coatings and also as a weep screed for accommodating drainage of water from behind the masonry coatings. The movement control screed comprises first and second flanges provided on opposite sides of first and second ribs.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to building construction devices that provide drainage and reduce cracks within masonry coatings such as stucco. More specifically, the present invention relates to an improved movement control screed that is structured to operate as a control joint for absorbing movement in a masonry coating and also as a weep screed to provide drainage of water from within and behind the masonry coating. 
     2. Description of Related Art 
     Expansion control joints and foundation weep screeds are commonly known in the masonry construction arts.  FIG. 1  depicts an exemplary expansion control joint  20  in accordance with the known prior art. Expansion control joints are used to break up large areas intended for receiving masonry coatings such as plaster, stucco, and the like, into smaller masonry coated areas for purposes of relieving stress and resisting cracking. The depicted expansion control joint  20  includes metal lath first and second flanges  25 ,  30 , and metallic first and second ribs  30 ,  32  defined between the first and second flanges  25 ,  30 . The metal lath flanges  25 ,  30  are typically attached to an exterior wall surface (not shown). First and second masonry coatings  42 ,  44  are applied to the exterior wall surface using the first and second ribs  30 ,  32  of the expansion control joint  20  as a guide for the applied thickness of the coatings. The first and second ribs  30 ,  32  of the expansion control joint  20  are symmetrical and deflectable for absorbing movement between the first and second masonry coatings  42 ,  44  during curing or other thermally induced expansion and contraction. 
       FIG. 2  depicts a foundation weep screed  70  structured in accordance with the known prior art. The foundation weep screed  70  is attached to an exterior wall  54  that is comprised of plywood sheathing  56  and attached to a wall frame  55  just above a concrete building foundation  60 . Foundation weep screeds  70  are commonly produced from sheet metal and positioned at the base of the exterior wall  54  for supporting a masonry coating (not shown) and providing a barrier that prevents water from coming into contact with the exterior wall  54 . 
     The depicted foundation weep screed  70  is secured to the base of the plywood sheathing  56 . The foundation weep screed  70  includes a flange  72 , and a rib  75 . The rib  75  defines an extending portion  74  for supporting an applied masonry coating and a returning portion  76 . The extending portion of the rib  75  begins generally adjacent the foundation transition  61  and tapers downwardly as shown. A drip edge DE is defined between the extending and returning portions  74 ,  76  of the rib  75 . Water resistant building paper  62  is typically positioned over the exterior wall  54  and the flange  72  for directing moisture from behind the masonry coating and over the foundation weep screed  70 . Moisture can get behind the masonry coating at improperly sealed joints (e.g., at doors or windows) or because of cracks that may form in the masonry coating. If left unchecked, such moisture may cause rotting of wooden structures within the wall. Installation of foundation weep screeds  70  as described above create a moisture path extending down the building paper  62 , along the flange  72 , and over the extending portion  74  of the rib  75  to the drip edge DE as shown. 
     In the wake of severe storms such as hurricanes, many jurisdictions have modified their building codes to require significant reinforcement of first level exterior walls. Typically, this reinforcement is provided by constructing first level exterior walls from reinforced concrete or other similar materials. Such walls provide enhanced wind and impact resistance. However, building codes continue to allow upper floors and roof structures to be made from wood trusses that rest on top of the concrete reinforced exterior walls. In this regard, wall transitions are now defined between dissimilar wall materials (e.g., wood and concrete) used for upper and lower floors. Accordingly, it would be desirable to prevent moisture from entering such wall transitions. It would also be desirable to support masonry coatings applied above and below the wall transitions and to absorb movement of the masonry coatings such as might occur during curing or thermal expansion and contraction of the coatings. 
     BRIEF SUMMARY OF THE INVENTION 
     The above needs and other advantages are met by a movement control screed that is structured for installation between first and second masonry coatings applied adjacent to a building wall and that functions both as an expansion control joint and as a weep screed. The movement control screed comprises first and second flanges and, in one embodiment, the first flange defines a planar substantially non-perforated surface for providing a moisture barrier and the second flange defines a substantially perforated surface that is adapted to more readily receive and support an applied masonry coating. At least two ribs defined between the flanges provide the ability for the flanges to move relative to each other and thus accommodate expansion, contraction, or other slight movements between adjoining wall sections. In addition, the ribs provide at least one drip edge to accommodate moisture drainage from behind a masonry coating and therefore the movement control screed also functions as a weep screed. 
     More specifically, a first rib defines a screed surface extending from the first flange adapted for positioning adjacent at least a portion of a first masonry coating and a second rib defines a screed surface extending from the second flange adapted for positioning adjacent at least a portion of a second masonry coating. In one embodiment, the first flange is deflectable from the second flange for supporting the first and second masonry coatings during relative movement. The screed surface of the first rib may also be deflectable relative to the screed surface of the second rib. Additionally, the screed surface of the first rib may be deflectable relative to the first flange and the screed surface of the second rib may be deflectable relative to the second flange. The above deflection capabilities operate to reduce cracking of the masonry coatings as will be apparent to one of ordinary skill in the art in view of the foregoing disclosure. 
     In another embodiment of the present invention, the first rib of the movement control screed defines a first screed depth that corresponds to a first masonry coating thickness and the second rib of the movement control screed defines a second screed depth that differs from the first screed depth and corresponds to a second masonry coating thickness. In one embodiment, the first screed depth is larger than the second screed depth. In this regard, first and second masonry coatings having differing thicknesses may be applied on either side of the movement control screed. 
     Another embodiment of the present invention is directed to a method of installing a movement control screed adjacent a building wall between first and second masonry coatings. The method includes attaching a movement control screed to the building wall wherein the movement control screed comprises a first flange, a second flange, a first rib defining a first screed depth disposed between the first and second flanges, and a second rib defining a second screed depth disposed between the first and second flanges. In one embodiment, the first screed depth is greater than the second screed depth. The method further includes a step of applying a first masonry coating to the building wall at a first masonry coating thickness that substantially corresponds to the first screed depth and applying a second masonry coating to the building wall at a second masonry coating thickness that substantially corresponds to the second screed depth. 
     The method may also include applying a water resistant layer over the first flange, before the step of applying the first masonry coating, in order to create a moisture path extending from the water resistant layer to the first flange and over the first rib. In addition, the method may include attaching a movement control screed having a first flange that is substantially non-perforated to encourage moisture to flow over and not behind the first flange. In yet another embodiment, the method may include attaching a movement control screed having a second flange that is substantially perforated to more readily receive and support the applied second masonry coating. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Having thus described the invention in general terms, reference will now be made to the accompanying drawings, which are not necessarily drawn to scale, and wherein: 
         FIG. 1  is a perspective view of an expansion control joint in accordance with the known prior art; 
         FIG. 2  is a perspective view of a foundation weep screed in accordance with the known prior art; 
         FIG. 3  is a perspective view of a movement control screed in accordance with one embodiment of the present invention; 
         FIG. 4  is a side view of the movement control screed of  FIG. 3  installed proximate a wall transition defined between non-masonry and masonry portions of a building wall in accordance with one embodiment of the present invention; and 
         FIG. 5  depicts a side view of the movement control screed for illustrating a few selected dimensions taken from two exemplary movement control screeds that are structured according to the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the inventions are shown. Indeed, this invention may 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 satisfy applicable legal requirements. Like numbers refer to like elements throughout. 
     For purposes of the foregoing specification and appended claims the term “masonry coating” refers to a surface covering for walls comprised of plaster, stucco, Portland cement, or other similar materials that are applied wet and then dry into a protective and/or aesthetically pleasing surface. 
       FIG. 3  depicts a perspective view of a movement control screed  120  in accordance with one embodiment of the present invention. The movement control screed  120  comprises a first flange  132 , a first rib  122 , a second rib  126 , and a second flange  134 . The movement control screed defines a length L and a width W. In the depicted embodiment, the width W appears larger than the length L; however, in practice, the width W of the movement control screed  120  is likely smaller than the length L. The length L of a movement control screed may, for example, correspond generally to the length of an adjacent building wall while the width W of the movement control screed need only be sufficient to cover small areas of the wall above and below a wall transition. For example, in one embodiment, the length L of a movement control screed is approximately ten feet while the width W is approximately six inches. In various embodiments, the length L of the movement control screed need not correspond directly to the length of an adjacent wall as multiple movement control screeds may be placed side-by-side to span the length of the wall. Caulking can be applied between adjoining screeds to assure proper water handling. 
     In the depicted embodiment, the first flange  132  of the movement control screed  120  is a substantially planar member that is arranged vertically against a building wall (not shown). The first flange  132  includes an attachment portion  133  and a substantially non-perforated portion  131 . The depicted attachment portion  133  defines an aperture  136  for receiving an attaching fastener (not shown) or keying the position of the movement control screed  120  relative to an adjacent movement control screed (not shown) as will be apparent to one of ordinary skill in the art. One or more apertures  136  may be created within the attachment portion  133  during installation of the movement control screed  120  as one or more nails, screws, or other fasteners are used to secure the first flange to the building wall. The substantially non-perforated portion  131  of the first flange  132  operates as a moisture barrier as will be discussed in greater detail below. 
     The first rib  122  extends from the base of the first flange  132  as shown. In one embodiment, the first rib  122  comprises an extending member  121 , a transition member R 1 , and a returning member  123 . The extending member  121  defines a screed or engagement surface  121 E that is structured to at least partially contact and support a masonry coating (not shown) when the masonry coating is applied. The first rib  122  can act as a screed to guide the application of the masonry coating when it is wet so that the resultant coating has the desired depth or thickness. After drying, the lower edge of the masonry coating may separate from the engagement surface  121 E or the first rib  122  slightly, especially if there is significant contraction of the masonry coating, which can allow water to more readily weep from behind the masonry coating and over the first rib  122 . 
     A drip angle θ is defined between the first flange  132  and the engagement surface  121 E of the extending member  121 . The drip angle θ is preferably greater than 90 degrees for encouraging moisture to run downwardly along the first flange  132  and on a descending path over the engagement surface  121 E and transition member R 1  of the first rib  122 . In various embodiments, the drip angle θ is between 91 and 145 degrees, preferably between 92 and 120 degrees, and more preferably between 93 and 115 degrees. As will be apparent to one of ordinary skill in the art, providing such drip angles allows water behind the masonry coating to be drawn away from the building wall and to drip harmlessly over the transition member R 1  of the first rib  122 . 
     In the depicted embodiment, the second rib  126  is positioned immediately below the first rib  122  and above the second flange  134  as shown. The second rib includes an extending member  125 , a transition member R 2 , and a returning member  127 . Although the depicted transitions members R 1 , R 2  define radii between the extending members  121 ,  125  and the returning members  123 ,  127  of the first and second ribs  122 ,  126  other non-radiused transitions are possible. For example, a chamfered, cornered, or pointed transition may be used especially in movement control screeds formed from polymeric materials. 
     A rib transition  128  is defined between the first rib  122  and the second rib  126 . In the depicted embodiment, the rib transition  128  is a simply defined radius however, in additional embodiments, the rib transition  128  may include one or more flat or planar portions (not shown) for expanding a channel  150  defined between the first and second ribs  122 ,  126 . 
     In various embodiments of the present invention, the returning portion  127  of the second rib defines an engagement surface  127 E that is structured to at least partially contact and support a masonry coating (not shown). In the depicted embodiment, one or more anchor tabs  130  extend from the engagement surface  127 E for further anchoring an adjacent masonry coating. 
     The depicted second flange  134  extends from the base of the returning portion  127  of the second rib  126  as shown. In one embodiment, the second flange  134  is at least partially perforated by apertures  138 ,  139 . One or more of the apertures  139  may be structured to receive fasteners (not shown) for securing the second flange  134  to the wall. Other apertures  138  may be provided simply to define a non-continuous surface that is better adapted to support adhesion with an adjacent masonry coating. In other embodiments, various additional known techniques (e.g., etching, roughing, etc.) may be used to encourage adhesion between the second flange  134  and an adjacent masonry coating. 
     In various embodiments of the present invention, the first rib  122  defines a first screed depth A and the second rib  126  defines a second screed depth B. In the depicted embodiment, the first screed depth A is larger than the second screed depth B. In this regard, moisture running along the engagement surface  121 E and over the transition portion R 1  of the first rib  122  may be allowed to drip freely from the first rib  122  without impacting the second rib  126 . Providing first and second ribs  122 ,  126  of differing screed depths may also provide additional benefits with regard to the application of masonry coatings having differing thicknesses as will be described in greater detail below. 
     Movement control screeds of various embodiments of the present invention may be manufactured from a variety of materials. For example, all or part of a movement control screed may be produced from metals such as aluminum, zinc, stainless steel, and galvanized steel, molded or extruded polymers and plastics, composites, and other similar materials. Factors influencing material selection are cost, corrosion resistance, regional or geographic environmental factors (e.g., expected humidity, environmental salinity, temperature, etc.), ease of forming, rigidity, and elasticity. The movement control screed depicted in  FIG. 3  is manufactured from a polyvinyl chloride (“PVC” ) resin and, thus, provides a deflectable, rigid, low cost, corrosion resistant, masonry coating-supporting article. 
       FIG. 4  depicts a side section view of a building wall  205  incorporating a movement control screed  220  in accordance with one embodiment of the present invention. This view has been shown with exaggerated clearances between the various components for clarity and ease of understanding. As noted above, it has become common in many areas of the country to construct homes or other dwellings having first floor exterior walls comprised of reinforced concrete or other similar materials and upper floors or roof structures constructed of wood framing. The depicted building wall  205  includes a masonry portion  210  and a non-masonry portion  211 . The non-masonry portion  211  is comprised of framing members  214  including for example, wooden studs, cross-members, and the like, and a plywood sheathing portion  216 . A wall transition  215  is defined between the masonry and non-masonry  210 ,  211  portions of the building wall  205  as shown. 
     Movement control screeds  220  structured in accordance with various embodiments of the present invention may be installed adjacent a building wall  205  proximate the wall transition  215  defined between the masonry and non-masonry portions  210 ,  211 . In the depicted embodiment, the movement control screed  220  comprises a first flange  232 , a first rib  222 , a second rib  226 , and a second flange  234 . The depicted first and second flanges  232 ,  234  are planar members positioned substantially flush against the non-masonry  211  and masonry  210  portions of the building wall  205 , respectively. More particularly, the first flange  232  is secured to the plywood sheathing  216  of the non-masonry portion  211  of the building wall  205  by fasteners  260  such as nails, screws and the like. In one embodiment, the fasteners  260  are disposed generally through an attachment portion  233  of the first flange  232  thereby defining a substantially non-perforated portion  231  below the attachment portion  233  as shown. 
     One or more layers of water resistant building paper  212  may be provided over the building wall  205 , the attachment portion  233  of the first flange  232 , and at least a part of the substantially non-perforated portion  231  of the first flange  232  such that any water or moisture running down the building wall  205  drains over and not behind the first flange  232  of the movement control screed  220 . In various embodiments, the movement control screed  220  is mounted such that at least part of the substantially non-perforated portion  231  of the first flange  232  extends a transition distance T below the wall transition  215  defined between the masonry and non-masonry portions  210 ,  211  of the building wall  205 . In this regard, the non-perforated portion  231  of the first flange  232  provides a barrier that prevents moisture from entering the wall transition  215  and decaying or otherwise degrading the building wall  205 . 
     The embodiment depicted in  FIG. 4  includes a first rib  222  defining a screed depth that is substantially larger than a screed depth defined by the second rib  226 . As noted above, the first rib  222  extends from the base of the first flange  232  and includes an extending member  221 , a transition member R 1 , and a returning member  223 . The extending member  221  defines a screed or engagement surface  221 E that is structured to at least partially contact and support a first masonry coating  245 . A drip angle θ is defined between the first flange  232  and the engagement surface  221  E of the extending member  221  as shown. As referenced above, the drip angle θ is preferably greater than 90 degrees for encouraging moisture to run downwardly along the first flange  232  and to continue on a descending path over the engagement surface  221 E and transition member R 1  of the first rib  222 . In this regard, moisture is drawn away from the wall and allowed to drip from the transition member R 1  of the first rib  222 . 
     A first masonry coating  245  is applied to the building wall  205  above the movement control screed  220 . In one embodiment, a metal or plastic lath  213  may be applied over the relatively smooth surfaces of the building paper  212  and first flange  232  to support the first masonry coating  245 . A second masonry coating  255  is applied to the building wall  205  below the movement control screed  220  as shown, and this coating may or may not be applied over lath (not shown) depending on the application. The second rib  226  includes an extending portion  225 , a transition member R 2 , and a returning portion  227 . The returning portion  227  of the second rib  226  includes a screed or engagement surface  227 E that is structured to contact and support at least part of the second masonry coating  255  as shown. In the depicted embodiment, an anchor tab  230  extends from the engagement surface  227 E of the returning portion  227  for anchoring the second masonry coating  255 . 
     In various embodiments of the present invention, the screed depth of the first rib  222  operates as a guide or screed to define a thickness C for the first masonry coating  245 . The screed depth of the second rib  226  operates as a guide for defining a thickness D for the second masonry coating  255 . In one embodiment, for example, the first and second masonry coatings may be applied at thicknesses sufficient to define first and second outer masonry surfaces that align generally with the outermost points of the transitions members R 1 , R 2  of the first and second ribs  222 ,  226  as shown. In other embodiments, the masonry coating may be applied at thicknesses sufficient to define first and second outer masonry surfaces that align generally with guide features defined by or disposed on the first and second ribs (not shown). Such guide features may include reference marks, protuberances, ribs, indentions, bends, or any other visible feature. Accordingly, the “screed depths” referred to in the present application and appending claims would be defined between the first and second flanges and such guide features rather than the first and second flanges and the outermost points of the first and second transition members as shown in  FIGS. 3 and 5 . 
     Conventional building codes allow masonry coatings applied adjacent walls of differing composition (e.g., wood reinforced portions vs. concrete reinforced portions) to have differing acceptable thicknesses. For example, the requisite coating thickness for masonry coatings applied to a reinforced cement wall or wall portion is less than the masonry coating thickness required for masonry coatings applied to wood framed walls or wall portions. Accordingly, in the depicted embodiment, the movement control screed  220  is structured to define a first masonry coating thickness C adjacent the non-masonry portion  211  of the building wall  205  that is greater than the second masonry coating thickness D defined adjacent the masonry portion  210  of the building wall  205 . 
     As will be apparent to one of ordinary skill in the art, masonry coatings such as stucco or plaster have a measurable coefficient of thermal expansion. If such coatings are applied and rigidly confined, the resulting stresses may produce unsightly cracking. In addition, other factors might cause relative movement between the two sections of masonry coating, such as settling of the building or wind or temperature induced movements between dissimilar (e.g., cement reinforced vs. wood framed, etc.) wall portions. Accordingly, the first flange  232  of the movement control screed  220  may be deflectable from the second flange  234 . The screed or engagement surface  221 E of the first rib  222  may also be deflectable relative to the screed or engagement surface  227 E of the second rib  226 . Additionally, the engagement surface  221 E of the first rib  222  may be deflectable relative to the first flange  232  and the engagement surface  227 E of the second rib  226  may be deflectable from the second flange  234 . The above deflections relieve slight relative movement (whether in the plane at the wall or otherwise) and the resulting masonry coating stresses occurring adjacent the wall transition  215 . 
     Example Embodiments 
       FIG. 5  depicts a side view of a movement control screed for illustrating a few selected dimensions taken from several exemplary movement control screeds. Numerical values for the selected dimensions are provided in Table 1 below for illustration purposely only. The precise dimensions of movement control screeds according to various embodiments of the present invention may vary from application to application as will be apparent to one of ordinary skill in the art. Thus, although numerous examples are provided in Table 1 below, multiple additional embodiments of the present invention may include dimensions and numerical values that are not listed in Table 1. The dimensions selected for Table 1 include an exemplary movement control screed width W, a first rib position X, a second rib position Z, and a channel width Y. Exemplary values for a first screed depth A and a second screed depth B are also provided. Notably, the exemplary values for A and B may be reversed to satisfy embodiments in which it is preferred for the second screed depth B to be larger than the first screed depth A. A transition height T is also defined between the wall transition  315  and the rib transition as shown. The dimensions provided in Table 1 are in inches. 
     
       
         
               
               
               
               
               
               
               
               
             
               
               
               
               
               
               
               
               
               
             
           
               
                   
                 TABLE 1 
               
               
                   
                   
               
               
                   
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                 B 
                 H 
                 T 
                 X 
                 Y 
                 Z 
               
               
                   
                   
               
             
             
               
                   
               
             
          
           
               
                   
                 Example 1 
                 ⅞ 
                 ½ 
                 5 13/16 
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                 3½ 
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                 1¾ 
               
               
                   
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                  9/16 
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                 1¾ 
               
               
                   
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                 Example 19 
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                 1¾ 
               
               
                   
                 Example 43 
                 1⅜ 
                  9/8 
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                 1 
                 3½ 
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                 Example 44 
                 1⅜ 
                 1¼ 
                 5 13/16 
                 1 
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                 1¾ 
               
               
                   
                 Example 45 
                 1½ 
                 ¼ 
                 5 13/16 
                 1 
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                 Example 46 
                 1½ 
                 ⅜ 
                 5 13/16 
                 1 
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                 1¾ 
               
               
                   
                 Example 47 
                 1½ 
                 ½ 
                 5 13/16 
                 1 
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                 Example 48 
                 1½ 
                 ⅝ 
                 5 13/16 
                 1 
                 3½ 
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                 Example 49 
                 1½ 
                 ¾ 
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                 1 
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                 Example 50 
                 1½ 
                 ⅞ 
                 5 13/16 
                 1 
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                 Example 51 
                 1½ 
                 1 
                 5 13/16 
                 1 
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                 Example 52 
                 1½ 
                  9/8 
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                 1 
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                 Example 53 
                 1½ 
                 1¼ 
                 5 13/16 
                 1 
                 3½ 
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                 Example 54 
                 1½ 
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                 5 13/16 
                 1 
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                 Example 55 
                 1⅝ 
                 ¼ 
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                 Example 56 
                 1⅝ 
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                 Example 57 
                 1⅝ 
                 ½ 
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                 Example 58 
                 1⅝ 
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                 Example 59 
                 1⅝ 
                 ¾ 
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                 Example 60 
                 1⅝ 
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                 Example 61 
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                 Example 62 
                 1⅝ 
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                 Example 63 
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                 Example 64 
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                 Example 65 
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                 Example 66 
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                 Example 67 
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                 Example 68 
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                 Example 69 
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                 Example 70 
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                 Example 71 
                 1¾ 
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                 Example 72 
                 1¾ 
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                 Example 73 
                 1¾ 
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                 Example 74 
                 1¾ 
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                 Example 75 
                 1¾ 
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                 Example 76 
                 1¾ 
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                 Example 77 
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                 Example 78 
                 1⅞ 
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                 Example 79 
                 1⅞ 
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                 Example 80 
                 1⅞ 
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                 Example 81 
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                 Example 82 
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                 Example 83 
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                 Example 84 
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                 Example 85 
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                 Example 86 
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                 Example 87 
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                 Example 88 
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                 Example 89 
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                 Example 90 
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                 Example 91 
                 2 
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                 Example 92 
                 2 
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                 Example 93 
                 2 
                 ½ 
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                 Example 94 
                 2 
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                 Example 95 
                 2 
                 ¾ 
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                 Example 96 
                 2 
                 ⅞ 
                 5 13/16 
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                 Example 97 
                 2 
                 1 
                 5 13/16 
                 1 
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                  9/16 
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                 Example 98 
                 2 
                  9/8 
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                 1 
                 3½ 
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                 Example 99 
                 2 
                 1¼ 
                 5 13/16 
                 1 
                 3½ 
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                 1¾ 
               
               
                   
                 Example 100 
                 2 
                 1⅜ 
                 5 13/16 
                 1 
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                 1¾ 
               
               
                   
                 Example 101 
                 2 
                 1½ 
                 5 13/16 
                 1 
                 3½ 
                  9/16 
                 1¾ 
               
               
                   
                 Example 102 
                 2 
                 1⅝ 
                 5 13/16 
                 1 
                 3½ 
                  9/16 
                 1¾ 
               
               
                   
                 Example 103 
                 2 
                 1¾ 
                 5 13/16 
                 1 
                 3½ 
                  9/16 
                 1¾ 
               
               
                   
                 Example 104 
                 2 
                 1⅞ 
                 5 13/16 
                 1 
                 3½ 
                  9/16 
                 1¾ 
               
               
                   
                   
               
             
          
         
       
     
     Many modifications and other embodiments of the invention set forth herein will come to mind to one skilled in the art to which these inventions pertain having the benefit of the teachings presented in the foregoing descriptions and the associated drawings. Therefore, it is to be understood that the invention is not to be limited to the specific embodiments disclosed and that modifications and other embodiments are intended to be included within the scope of the appended claims. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.