Patent Publication Number: US-2023134956-A1

Title: Multipurpose interlockable board system

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     The present application claims the benefit of priority from U.S. Provisional Application No. 63/275,509, filed Nov. 4, 2021, which is hereby incorporated herein by reference in its entirety. 
    
    
     FIELD 
     The specification relates generally to a multipurpose interlockable board system for use in general construction. 
     BACKGROUND 
     U.S. Pat. No. 6,519,912 (Eckmann et al.) discloses a converted wood article for use in combination with other converted wood articles to form composite wood products for use in general construction such as in the construction of posts, flooring, walls, and support beams. Converted wood articles preferably include engaging surfaces and in composite wood products formed therefrom include joints between engaging surfaces which are displaced from the outer corners of the composite wood product. Adjacent engaging surfaces forming a joint include correspondingly shaped inter-engaging portions. 
     U.S. Pat. No. 5,870,876 (Deiter) discloses a converted wood article for use in combination with other converted wood articles to form composite wood products for use in the construction of posts, flooring, walls, and support beams. 
     U.S. Pat. No. 9,682,492 (Schaffter) discloses a woodworking jig used to set cutter height and horizontal fence position when forming lock miter joints with a forty-five degree lock miter cutter on a router table or shaper. 
     SUMMARY 
     The following summary is intended to introduce the reader to various aspects of the applicant&#39;s teaching, but not to define any invention. 
     According to some aspects, a multipurpose interlockable board system comprises a plurality of identical interlockable boards. Each board includes: (a) a board first face and a board second face parallel to the board first face and spaced apart from the board first face by a board thickness. The board first and second faces extend axially along a board axis between first and second end edges of the board and extend laterally between first and second side edges of the board. Each board further includes: (b) an interlockable first side joint profile extending along the first side edge; and (c) an interlockable second side joint profile extending along the second side edge. Each of the first and second side joint profiles of each board is interlockable with each of the first and second side joint profiles of another board for interlocking laterally adjacent boards in a coplanar arrangement in which the boards are generally coplanar for selectively forming a flat covering, and in an orthogonal arrangement in which laterally adjacent boards are generally perpendicular for selectively forming a hollow section. Each board further includes (d) an interlockable first end joint profile extending along the first end edge; and (e) an interlockable second end joint profile extending along the second end edge. The second end joint profile of each board is interlockable with the first end joint profile of another board for interlocking axially adjacent boards end-to-end to lengthen the flat covering and the hollow section selectively formed by the boards. 
     In some examples, the board has four corners where corresponding end joint profiles and edge joint profiles intersect. 
     In some examples, each of the first and second end joint profiles extends generally continuously from the first side edge to the second side edge of the board, and each of the first and second side joint profiles extends generally continuously from the first end edge to the second end edge of the board. 
     In some examples, each board is of integral, unitary, one-piece construction. 
     In some examples, the board is made of solid wood, and each of the first and second side joint profiles and the first and second end joint profiles are cut into the solid wood. 
     In some examples, the first end joint profile comprises an end groove extending axially into the first end edge and laterally between the first and second side edges, and the second end joint profile comprises an end tongue projecting axially from the second end edge and extending laterally between the first and second side edges. 
     In some examples, the end groove is disposed orthogonally between a pair of axially extending first and second flanges. The first flange has a first flange outer surface defined by part of the board first face and a first flange inner surface opposite the first flange, and the second flange has a second flange outer surface defined by part of the board second face and a second flange inner surface opposite the second flange outer surface and facing the first flange inner surface. The end groove is bounded orthogonally by the first and second flange inner surfaces. 
     In some examples, the second end joint profile includes a first end recess adjacent the end tongue and open orthogonally to the first face and a second end recess adjacent the end tongue opposite the first end recess and open orthogonally to the board second face. When axially adjacent boards are interlocked end-to-end, the first and second end recesses of one board of the axially adjacent boards receive the first and second flanges, respectively, of another board of the axially adjacent boards. 
     In some examples, the laterally adjacent boards are interlockable in a first side-by-side coplanar arrangement along respective first sides thereof by interlocking together the first side joint profiles of each board of the laterally adjacent boards, and are interlockable in a second side-by-side coplanar arrangement along respective second sides thereof by interlocking together the second side joint profiles of each board of the laterally adjacent boards. 
     In some examples, the laterally adjacent boards are interlockable in the orthogonal arrangement along respective sides thereof by interlocking together the first side joint profile of one board of the laterally adjacent boards with the second side joint profile of another board of the laterally adjacent boards. 
     In some examples, the first side joint profile defines a first lock miter profile and the second side joint profile defines a second lock miter profile. The first and second lock miter profiles correspond in shape and size for interlocking thereof and are oriented perpendicular to each other. 
     In some examples, each of the first side joint profile and the second side joint profile comprises a 45-degree bevel surface sloping laterally inwardly from the second face to the first face, a side groove in the bevel surface, and a side tongue adjoining the side groove and projecting from the bevel surface. The side tongue and groove of the first side joint profile are oriented parallel to the first and second faces, and the side tongue and groove of the second side joint profile are oriented perpendicular to the first and second faces, and each side tongue and groove of the board is interlockable with each side tongue and groove of another board. 
     In some examples, the first side joint profile comprises a first side groove disposed between a laterally protruding side flange and a laterally protruding first side tongue. The side flange has a side flange outer surface defined by part of the board second face and a side flange inner surface orthogonally opposite the side flange outer surface and bounding the first side groove, and the first side tongue protrudes laterally outwardly and is disposed orthogonally intermediate the first side groove and the board first face. Laterally adjacent boards are interlockable in a first side-by-side coplanar arrangement, in which the first side tongue of each board of the laterally adjacent boards is received in a corresponding first side groove of another board of the laterally adjacent boards. 
     In some examples, the first side joint profile includes a side recess adjacent the first side tongue opposite the first side groove and open orthogonally to the board first face, and when laterally adjacent boards are interlocked in the first side-by-side coplanar arrangement, the side flange of each board of the laterally adjacent boards is received in a corresponding side recess of another board of the laterally adjacent boards. 
     In some examples, the second side joint profile comprises a second side groove open orthogonally to the first face and a second side tongue laterally outboard of the first side groove and projecting orthogonally toward the first face, and laterally adjacent boards are interlockable in a second side-by-side coplanar arrangement, in which the second side tongue of each board of the laterally adjacent boards is received in a corresponding second side groove of another board of the laterally adjacent boards. 
     In some examples, when laterally adjacent boards are interlocked in the orthogonal arrangement, the first side tongue of a first board of the laterally adjacent boards is received in the second side groove of a second board of the laterally adjacent boards, and the second side tongue of the second board is received in the first side groove of the first board. 
     According to some aspects, a multipurpose interlockable board system includes a plurality of identical boards interlockable in a coplanar arrangement in which laterally adjacent boards are generally coplanar for selectively forming a flat covering and in an orthogonal arrangement in which laterally adjacent boards are generally perpendicular for selectively forming a hollow section. The boards are interlockable end-to-end to lengthen the flat covering and the hollow section selectively formed by the boards. 
     In some examples, each board has interlockable side joint profiles along laterally opposing edges of the board for interlocking the boards in the coplanar arrangement and in the orthogonal arrangement, and interlockable end joint profiles along axially opposite ends of the board for interlocking the boards end-to-end. 
     In some examples, the boards are made entirely of solid wood, and wherein the side joint profiles and the end joint profiles are cut into the solid wood. 
     According to some aspects, a method of manufacturing an interlockable board for a multipurpose interlockable board system includes: (a) cutting a first side joint profile along a first side edge of the board and a complementary second side joint profile along a second side edge of the board laterally opposite the first side edge. Each of the first and second side joint profiles of the board interlockable with each of the first and second side joint profiles of another board for interlocking laterally adjacent boards in a coplanar arrangement in which the boards are generally coplanar for selectively forming a flat covering, and in an orthogonal arrangement in which laterally adjacent boards are generally perpendicular for selectively forming a hollow section. The method further includes: (b) cutting a first end joint profile along a first end edge of the board and a complementary second end edge joint profile along a second end edge of the board axially opposite the first end edge. The second end joint profile of the board is interlockable with the first end joint profile of another identical board for interlocking axially adjacent boards end-to-end to lengthen the flat covering and the hollow section selectively formed by the boards. In some examples, (a) is performed prior to (b). In some examples, (b) includes cutting through end portions of the first side joint profile and of the second side joint profile formed in (a). 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The drawings included herewith are for illustrating various examples of articles, systems, and methods of the present specification and are not intended to limit the scope of what is taught in any way. In the drawings: 
         FIG.  1    is a plan view of an example interlockable board system in a coplanar arrangement; 
         FIG.  2    is a perspective view of the interlockable board system of  FIG.  1    in an orthogonal arrangement; 
         FIG.  3    is a perspective view from a first end of an example board of the board system of  FIG.  1   ; 
         FIG.  4    is an end view from a second end of the board of  FIG.  3   ; 
         FIG.  5    is a side view from a first side of end portions of the board of  FIG.  3   ; 
         FIG.  6    is an end view of the board system in the coplanar arrangement shown in  FIG.  1   ; 
         FIG.  6 A  is an enlarged view of interlocked first side edge portions of a pair of boards of the board system of  FIG.  6   ; 
         FIG.  6 B  is an enlarged view of interlocked second side edge portions of another pair of boards of the board system  FIG.  6   ; 
         FIG.  7    is an end view of the board system in the orthogonal arrangement shown in  FIG.  2   ; 
         FIG.  7 A  is an enlarged view of a corner of the board system shown in  FIG.  7   , showing interlocked edge portions of a pair of the boards of the board system shown in  FIG.  7   ; 
         FIG.  8    is an enlarged side view of interlocked end portions of a pair of the boards of the board system of  FIG.  1   ; 
         FIG.  9    is a perspective view of a first corner of the board of  FIG.  3   ; 
         FIG.  10    is a perspective view of a second corner of the board of  FIG.  3   ; 
         FIG.  11    is a perspective view of a third corner of the board of  FIG.  3   ; 
         FIG.  12    is a perspective view of a fourth corner of the board of  FIG.  3   ; 
         FIG.  13    is a perspective view of another example board for an interlockable board system; and 
         FIG.  14    is an end view of the board of  FIG.  13   . 
     
    
    
     DETAILED DESCRIPTION 
     Various articles, systems, or processes will be described below to provide an example of an embodiment of each claimed invention. No embodiment described below limits any claimed invention and any claimed invention may cover articles, systems, or processes that differ from those described below. The claimed inventions are not limited to articles, systems, or processes having all of the features of any one article, system, or process described below or to features common to multiple or all of the articles, systems, or processes described below. It is possible that an article, system, or process described below is not an embodiment of any claimed invention. Any invention disclosed in an article, system, or process described below that is not claimed in this document may be the subject matter of another protective instrument, for example, a continuing patent application, and the applicants, inventors, or owners do not intend to abandon, disclaim, or dedicate to the public any such invention by its disclosure in this document. 
     Referring to  FIGS.  1  and  2   , an example multipurpose interlockable board system  100  is shown. The board system  100  includes a plurality of identical interlockable boards  102  interlockable in a coplanar arrangement (shown in  FIG.  1   ) and in a orthogonal arrangement (shown in  FIG.  2   ). Referring to  FIG.  1   , when in the coplanar arrangement, laterally adjacent boards  102  are generally coplanar for selectively forming a flat covering  104 . The flat covering  104  can be used as, for example, a wall or floor covering. Referring to  FIG.  2   , when in the orthogonal arrangement, laterally adjacent boards  102  are perpendicular to each other for selectively forming a hollow section  106 . The hollow section  106  shown in  FIG.  2    is formed from four boards  102  and has a square cross-section in the example illustrated. The hollow section  106  can be used as, for example, a column (e.g. a post covering for a structural post) or beam (e.g. a decorative ceiling beam). The boards  102  are interlockable end-to-end to lengthen the flat covering  104  and the hollow section  106  selectively formed by the boards to a desired length. 
     Referring to  FIG.  3   , each board  102  has a board first face  108  and a board second face  112  spaced orthogonally apart from the board first face  108  by a board thickness. The board first and second faces  108 ,  112  extend axially along a board axis  110  between first and second end edges  122 ,  126 . The board first and second faces  108 ,  112  extend laterally between first and second side edges  114 ,  118 . Referring to  FIG.  4   , in the example illustrated, an interlockable first side joint profile  116  extends along the first side edge  114  and an interlockable second side joint profile  120  extends along the second side edge  118 . Each of the first and second side joint profiles  116 ,  120  of each board  102  is interlockable with each of the first and second side joint profiles  116 ,  120  of another board  102  for interlocking laterally adjacent boards  102  in the coplanar arrangement and in the orthogonal arrangement. 
     Referring to  FIG.  5   , in the example illustrated, an interlockable first end joint profile  124  extends along the first end edge  122  of the board  102  and an interlockable second end joint profile  128  extends along the second end edge  126  of the board  102 . The second end joint profile  128  of each board  102  is interlockable with the first end joint profile  124  of another board  102  for interlocking axially adjacent boards  102  end-to-end to lengthen the flat covering  104  and the hollow section  106  selectively formed by the boards  102 . 
     Referring to  FIG.  6 A , in the example illustrated, laterally adjacent boards  102  are interlockable in a first side-by-side coplanar arrangement (shown in  FIG.  6 A ) along respective first sides thereof by interlocking together the first side joint profiles  116  of each board  102  of the laterally adjacent boards  102 . Referring to  FIG.  6 B , in the example illustrated, laterally adjacent boards  102  are interlockable in a second side-by-side coplanar arrangement (shown in  FIG.  6 B ) along respective second sides thereof by interlocking together the second side joint profiles  120  of each board  102  of the laterally adjacent boards  102 . In the example illustrated, when in either coplanar arrangement, the first face  108  of a first board  102  of the laterally adjacent (and interlocked) boards  102  is generally coplanar with the second face  112  of a second board of the laterally adjacent boards  102 , and the first face  108  of the second board  102  is generally coplanar with the second face  112  of the first board  102 . 
     Referring to  FIG.  7 A , in the example illustrated, laterally adjacent boards  102  are interlockable in the orthogonal arrangement along respective sides thereof by interlocking together the first side joint profile  116  of one board  102  of the laterally adjacent boards  102  with the second side joint profile  120  of another board  102  of the laterally adjacent boards  102 . In the example illustrated, when in the orthogonal arrangement, the first faces  108  of the laterally adjacent boards  102  are perpendicular and generally adjoin each other at a corresponding interior corner of the hollow section formed by the laterally adjacent boards  102 , and the second faces  112  of the boards  102  are perpendicular and generally adjoin each other at corresponding exterior corner of the hollow section formed by the adjacent boards  102 . 
     Referring to  FIG.  8   , axially adjacent boards  102  are interlockable end-to-end along respective ends thereof by interlocking together the first end joint profile  124  of one board  102  of the axially adjacent boards  102  with the second end joint profile  128  of another board  102  of the axially adjacent boards  102 . In the example illustrated, when axially adjacent boards  102  are interlocked end-to-end, the first faces  108  of the axially adjacent boards  102  are generally coplanar with each other and the second faces  112  of the axially adjacent boards  102  are generally coplanar with each other. 
     Referring to  FIG.  5   , in the example illustrated, the first end joint profile  124  comprises an end groove  130  extending axially into the first end edge  122  and laterally between the first and second side edges  114 ,  118 . The second end joint profile  128  comprises an end tongue  132  projecting axially from the second end edge  126  and extending laterally between the first and second side edges  114 ,  118 . Referring to  FIG.  8   , when axially adjacent boards  102  are interlocked end-to-end, the end tongue  132  of one board  102  of the axially adjacent boards  102  is received in the end groove  130  of another board  102  of the axially adjacent boards  102 . 
     Referring to  FIG.  5   , in the example illustrated, the first end edge  122  has a first end surface  134  extending orthogonally between the first and second faces  108 ,  112  and laterally between the first and second side edges  114 ,  118 , and the second end edge  126  has a second end surface  136  extending orthogonally between the first and second faces  108 ,  112  and laterally between the first and second side edges  114 ,  118 . The end groove  130  extends axially into the first end surface  134  along the board axis  110 , and the end tongue  132  projects axially from the second end surface  136 . In the example illustrated, the first and second end surfaces  134 ,  136  are generally perpendicular to the first and second faces  108 ,  112  and the first and second side edge  114 ,  118 . Referring to  FIG.  8   , in the example illustrated, when axially adjacent boards  102  are interlocked end-to-end, the first end surface  134  of one board  102  of the axially adjacent boards  102  axially abuts the second end surface  136  of another board  102  of the axially adjacent boards  102 . 
     In the example illustrated, the end tongue  132  and the end groove  130  are generally centered between the first and second faces  108 ,  112 . In the example illustrated, the end groove  130  is spaced orthogonally apart from the board first face  108  by a first portion of the first end surface  134  and is spaced orthogonally apart from the board second face  112  by a second portion of the first end surface  134 . In the example illustrated the first and second portions of the first end surface  134  have a generally equal width (measured orthogonal to the first and second board faces  108 ,  112 ). In the example illustrated, the end tongue  132  is spaced orthogonally apart from the board first face  108  by a first portion of the second end surface  136  and is spaced orthogonally apart from the board second face  112  by a second portion of the second end surface  136 . In the example illustrated the first and second portions of the second end surface  136  have a generally equal width (measured orthogonal to the first and second board faces  108 ,  112 ). 
     Referring to  FIG.  5   , in the example illustrated, the end groove  130  is disposed orthogonally between a pair of axially extending first and second flanges  137   a ,  137   b . The first flange  137   a  has a first flange outer surface defined by part of the board first face  108  and a first flange inner surface orthogonally opposite the first flange outer surface. The second flange  137   b  has a second flange outer surface defined by part of the board second face  112  and a second flange inner surface opposite the second flange outer surface and facing the first flange inner surface. The end groove  130  is bounded orthogonally by the first and second flange inner surfaces. The first and second flanges  137   a ,  137   b  have axial endfaces together defining the first end surface  134 . 
     In the example illustrated, the second end joint profile  128  includes a first end recess  139   a  adjacent the end tongue and open orthogonally to the board first face  108  and a second end recess  139   b  adjacent the end tongue orthogonally opposite the first end recess  139   a  and open orthogonally to the board second face  112 . In the example illustrated, the second end surface  136  defines an axial boundary of the first and second end recesses  139   a ,  139   b . When axially adjacent boards  102  are interlocked end-to-end, the first and second end recesses  139   a ,  139   b  of one board  102  of the axially adjacent boards  102  receive the first and second flanges  137   a ,  137   b  of another board of the axially adjacent boards  102 . 
     Referring to  FIG.  4   , in the example illustrated, the first side joint profile  116  defines a first lock miter profile and the second side joint profile  120  defines a second lock miter profile. The first and second lock miter profiles correspond in shape and size to each other for interlocking thereof and are oriented perpendicular to each other to facilitate interlocking of the boards  102  in the coplanar arrangement and the orthogonal arrangement. 
     In the example illustrated, the first side joint profile  116  comprises a 45-degree first bevel surface  138   a  sloping laterally inwardly from the second face  112  to the first face  108 , a first side groove  144   a  in the first bevel surface  138   a , and a first side tongue  146   a  adjoining the first side groove  144   a  and projecting from the first bevel surface  138   a . In the example illustrated, the first side tongue and groove  144   a ,  146   a  of the first side joint profile  116  are oriented parallel to the first and second faces  108 ,  112 , with the first side tongue  146   a  protruding laterally and the first side groove  144   a  open to a first side of the board  102 . In the example illustrated, the first side tongue  146   a  is between the first face  108  and the first side groove  144   a . In the example illustrated, the first side tongue  146   a  is spaced orthogonally apart from the board first face  108  by a first portion of the first bevel surface  138   a , and the first side groove  144   a  is spaced orthogonally apart from the board second face  112  by a second portion of the first bevel surface  138   a . The first and second portions of the first bevel surface  138   a  are generally equal in width (measured along the bevel surface  138   a  perpendicular to the board axis  110 ). In the example illustrated, when the board  102  is viewed from the end edge ( 122  or  126 ), the innermost end of the first side groove  144   a  and the tip of the first side tongue  146   a  are generally planar. 
     The second side joint profile  120  comprises a 45-degree second bevel surface  138   b  sloping laterally inwardly from the second face  112  to the first face  108 , a second side groove  144   b  in the second bevel surface  138   b , and a second side tongue  146   b  adjoining the second side groove  144   b  and projecting from the second bevel surface  138   b . In the example illustrated, the second side tongue and groove  144   b ,  146   b  of the second side joint profile  120  are oriented orthogonal to the first and second faces  108 ,  112 , with the second side groove  144   b  open orthogonally to the first face and the second side tongue  146   b  protruding orthogonally toward the first face  108 . In the example illustrated, the second side groove  144   b  is between the first face  108  and the second side tongue  146   b . In the example illustrated, the second side groove  144   b  is spaced orthogonally apart from the board first face  112  by a first portion of the second bevel surface  138   b , and the second side tongue  146   b  is spaced orthogonally apart from the board second face  112  by a second portion of the second bevel surface  138   b . The first and second portions of the second bevel surface  138   b  are generally equal in width (measured along the bevel surface  138   a  perpendicular to the board axis  110 ). In the example illustrated, when the board  102  is viewed from the end edge ( 122  or  126 ), the innermost end of the second side groove  144   b  and the tip of the second side tongue  146   b  are generally planar. 
     In the example illustrated, laterally adjacent boards  102  are interlockable in the first side-by-side coplanar arrangement by interlocking the first side tongue and groove  144   a ,  146   a  of one board  102  of the laterally adjacent boards  102  with the first side tongue and groove  144   a ,  146   a  of another board  102  of the laterally adjacent boards  102  (with the first bevel surfaces  138   a  of the boards  102  generally abutting). Laterally adjacent boards  102  are interlockable in the second side-by-side coplanar arrangement by interlocking the second side tongue and groove  144   b ,  146   b  of one board  102  of the laterally adjacent boards  102  with the second side tongue and groove  144   b ,  146   b  of another board  102  of the laterally adjacent boards  102  (with the second bevel surfaces  138   b  of the boards  102  generally abutting). Laterally adjacent boards  102  are interlockable in the orthogonal arrangement by interlocking the first side tongue and groove  144   a ,  146   a  of one board  102  of the laterally adjacent boards  102  with the second side tongue and groove  144   b ,  146   b  of another board  102  of the laterally adjacent boards  102  (with the first bevel surface  138   a  of the one board  102  abutting the second bevel surface  138   b  of the other board  102 ). 
     Referring to  FIG.  4   , in the example illustrated, the first side groove  144   a  is disposed between a laterally protruding side flange  147  and the first side tongue  146   a . The side flange  147  has a side flange outer surface defined by part of the board second face  112  and a side flange inner surface orthogonally opposite the side flange outer surface and bounding the first side groove  144   a . The first side tongue  146   a  protrudes laterally outwardly and is disposed orthogonally intermediate the first side groove  144   a  and the board first face  108 . The first side joint profile  116  includes a side recess  149  adjacent the first side tongue  146   a  opposite the first side groove  144   a  and open orthogonally to the board first face  108 . 
     When laterally adjacent boards  102  are interlocked in the first side-by-side coplanar arrangement, each first side tongue  146   a  is received in a corresponding first side groove  144   a  and each side flange  147  is received in a corresponding side recess  149 . When laterally adjacent boards  102  are interlocked in the second side-by-side coplanar arrangement, each second side tongue  146   b  is received in a corresponding second side groove  144   b . When laterally adjacent boards  102  are interlocked in the orthogonal arrangement, the first side tongue  146   a  of a first board  102  is received in the second side groove  144   b  of a second board  102 , and the second side tongue  146   b  of the second board  102  is received in the first side groove  144   a  of the first board  102 . 
     In the example illustrated, each board  102  is of integral, unitary, one-piece construction. In the example illustrated, each board  102  is made of solid wood, and each of the first and second side joint profiles  116 ,  120  and the first and second end joint profiles  124 ,  128  are cut into the solid wood. Referring to  FIGS.  9  to  12   , each of the first and second end joint profiles  124 ,  128  extends generally continuously from the first side edge  114  to the second side edge  118  of the board  102 , and each of the first and second side joint profiles  116 ,  120  extends generally continuously from the first end edge  122  to the second end edge  126  of the board  102 . In the example illustrated, each board  102  has four corners where corresponding end joint profiles  124 ,  128  and side joint profiles  116 ,  120  intersect. In the example illustrated, the end groove  130  is laterally open to laterally opposite sides of the board  102 , and each of the first and second side grooves  144   a ,  144   b  is axially open to axially opposite ends of the board  102 . In the example illustrated, the end groove  130  extends axially into the first and second tongues  146   a ,  146   b  and is open to the first and second side grooves  144   a ,  144   b . In the example illustrated, the first and second side grooves  144   a ,  144   b  pass axially through the end tongue  132 , and axial end portions of the first and second side tongues  146   a ,  146   b  define laterally outer end portions of the end tongue  132 . 
     A method of manufacturing the boards  102  includes cutting along the first side edge  114  of the board  102  to form the first side joint profile  116  and along the second side edge  118  of the board  102  to form the second side joint profile  120 , and cutting along the first end edge  122  of the board  102  to form the first end joint profile  124  and along the second end edge  126  of the board  102  to form the second end joint profile  128 . In the example illustrated, the first and second side joint profiles  116 ,  120  are cut into the first and second side edges  114 ,  118  using one or more rotary cutters (e.g. a pair of identical lock miter bits oriented at 90 degrees relative to each other), and the first and second end joint profiles  124 ,  128  are cut into the first and second end edges  122 ,  126  using one or more rotary cutters (e.g. a tongue bit and a corresponding groove bit). In the example illustrated, the first and second side joint profiles  116 ,  120  are cut prior to cutting the first and second end joint profiles  124 ,  128 , and cutting the first and second end joint profiles  124 ,  128  includes cutting through axially opposite end portions of the first and second side joint profiles  116 ,  120 . 
     Referring to  FIG.  13   , another example interlockable board  1102  is illustrated. A plurality of the boards  1102  are usable together to form a multipurpose interlockable board system like that described herein with reference to the system  100 . The board  1102  has similarities to the board  102 , and like features are indicated using like reference characters, incremented by 1000. 
     In the example illustrated, each board  1102  has a board first face  1108  and an opposite board second face  1112 . The board first and second faces  1108 ,  1112  extend axially between first and second end edges  1122 ,  1126  and laterally between first and second side edges  1114 ,  1118  of the board  1102 . 
     Referring to  FIG.  14   , in the example illustrated, an interlockable first side joint profile  1116  extends along the first side edge  1114  and a complementary interlockable second side joint profile  1120  extends along the second side edge  1118 . In the example illustrated, the first side joint profile  1116  comprises a first side groove  1144   a  and a first side tongue  1146   a  adjoining the first side groove  1144   a . When the board  1102  is viewed from the end edge ( 1122  or  1126 ), the innermost end of the first side groove  1144   a  and the tip of the first side tongue  1146   a  have rounded profiles defined by complementary radii. The second side joint profile  1120  comprises a second side groove  1144   b  and a second side tongue  1146   b  adjoining the second side groove  1144   b . When the board  1102  is viewed from the end edge ( 1122  or  1126 ), the innermost end of the second side groove  1144   b  and the tip of the second side tongue  1146   b  have rounded profiles defined by complementary radii.