the following detailed description is of the best presently contemplated mode of carrying out the invention . the description is not intended in a limiting sense , and is made solely for the purpose of illustrating the general principles of the invention . the various features and advantages of the present invention may be more readily understood with reference to the following detailed description taken in conjunction with the accompanying drawings . referring now to the drawings in detail , where like numerals refer to like parts or elements , there is shown in fig1 a mobile fire pit holder 10 which has a six - sided geometric frame 12 . the frame 12 has an outer wall 14 which is upstanding and is used to contain fireproof material 30 within the outer wall . the frame 12 also has a lower inwardly extending shoulder 16 providing for a location for mounting a set of wheels 32 and for mounting a supporting framework 20 a , 20 b . the support framework 20 a , 20 b is comprised of two wooden supports mounted across the open space in perpendicular arrangement between opposing sidewall sections of the six - sided outer wall 14 utilizing the shoulder 16 as a platform , thus creating an “ x ” providing support extending to the center of the fire pit holder 10 . mounted directly above , and utilizing the support of the support framework 20 a , 20 b , is a perforated screen 18 that rests atop the framework 20 a , 20 b . the combination of the outer wall 14 and the screen 18 provide a space into which the fireproof material 30 is placed and retained . the fireproof material 30 may be any fire impervious material such as stone that is capable of being moved about within the space to provide one or more depressions to retain a fire pit 40 or a fire pit stand 42 in its placed position without relative motion in any direction . referring to fig2 , one type of fire pit 40 and fire pit holder 42 is shown in phantom . the fire pit holder 42 is placed atop the fireproof material 30 with depressions made to retain the several feet of the fire pit holder 42 in position in the fireproof material 30 . in this sectional view , it is easier to see the fireproof material 30 retained within the space made by the combination of the screen 18 and the outer wall 14 of the fire pit holder 10 . the cross structure of the support framework 20 a , 20 b is also easier to see , as well as the shoulder 16 used to support the ends of the support framework 20 a , 20 b . the shoulder 16 is also used to mount the set of wheels 32 to the fire pit holder 10 to provide mobility so that the fire pit holder 10 and any mounted fire pit 40 can be rolled from one location to another over a reasonably flat surface . in this first version or mode of utilizing the support framework 20 a , 20 b , the set of wheels 32 are alternately mounted at 90 ° degree points of separation so that the wheels 32 are mounted at the midpoints of opposing segments of side wall 14 and at opposing apices of side wall 14 . thus , with the wheels 32 mounted to blocks ( shown in phantom as squares in fig1 ) and separated as shown , the fire pit holder achieves reasonable stability when in place or while being moved . an alternate support framework 20 - 1 to 20 - 4 is shown in fig3 for an eight - sided fire pit holder 10 . in this embodiment , the support framework spans between alternating apices between the segments of the side wall 14 with support framework pieces 20 - 1 and 20 - 3 overlying pieces 20 - 2 and 20 - 4 . as in the previously described embodiment , the perforated screen 18 is mounted atop the support framework 20 - 1 through 20 - 4 with the fireproof material 30 placed into the space created above the screen 18 and within the sidewall 14 . the fire pit 40 , or the fire pit stand 42 , can be positioned within the space atop the fireproof material 30 as described above . in this second version or mode of utilizing the support framework 20 - 1 through 20 - 4 , the set of wheels 32 are mounted at 90 ° degree points of separation at the locations where the ends of each of the pieces 20 - 1 , 20 - 4 overlie the shoulder 16 . in this way the wheels 32 are mounted at the apices of adjacent segments of side wall 14 in a square configuration . thus , with the wheels 32 mounted to blocks ( shown in phantom as squares in fig3 ) and separated as shown , the fire pit holder 10 achieves reasonable stability when in place or while being moved . another embodiment of the support framework is shown in fig4 - 5 in a six - sided fire pit holder 10 . this alternate support framework 20 a , 20 b 1 and 20 b 2 is also situated within the side wall 14 and uses the shoulder 16 as support for each piece of the support framework &# 39 ; s respective ends . as described above , support framework piece 20 a extends across the open space between two opposing apices of the several segments of the side wall 14 . lying atop the piece 20 a are both support framework pieces 20 b 1 and 20 b 2 that also extend across the space between the apices at opposite ends of the segments of the side wall 14 that are parallel to piece 20 a and opposite to each other . the framework support pieces 20 a , 20 b 1 and 20 b 2 form an “ h ” with a laterally outward extending crossbar within the space defined by the side wall 14 of the fire pit holder 10 . the “ h ” forms the support for the perforated screen 18 that , in turn , supports the fireproof material 30 that is retained atop the screen 18 and within the side wall 14 . as shown in fig5 , the fire pit 40 ( in a bowl configuration ) may be positioned directly on top of the fireproof material 30 as described previously . in the third embodiment the wheels 32 are also mounted utilizing the support framework 20 a , 20 b 1 and 20 b 2 . the set of six wheels 32 are mounted at 60 ° degree points of separation at the locations along the side wall 14 where the ends of each of the support framework pieces 20 - 1 , 20 - 4 overlie the shoulder 16 . in this way the wheels 32 are mounted at the apices of adjacent segments of side wall 14 in a hexagonal configuration . thus , with the wheels 32 mounted to blocks ( shown in phantom as squares in fig4 ) and separated as shown , this version of the fire pit holder 10 also achieves reasonable stability when in place or while being moved . there are several similarities in the construction of the three different support systems for the fire pit holder 10 of the present invention . in each of the embodiments the side wall 12 can be made of wood or metal having a depth of at least 5 inches and preferably 6 inches . the support framework can also be made of wood or metal and should be at least 0 . 75 inches thick and at least 5 inches wide . the perforated screen 18 can be made from perforated aluminum or from stainless steel . however , since the fire pit holder 10 will likely remain outdoors in all kinds of weather , the frame , including the support framework , the screen and any other metal part , such as fasteners , should be resistant to oxidation ( rust ) and corrosion in order to retain rigidity and complete functionality . the fireproof material 30 was described as being stone or gravel of a relatively consistent size of 1 inch . flat stones can be used instead of the gravel and concrete pavers can be added above the gravel for a more solid surface look . it is important to note that the screen 18 is provided not only to retain the fireproof material 30 within the space created within the side wall 14 , but also to provide for drainage of seasonal rain water or snow melt from the fire pit holder 10 . the wheels 32 , whatever their number depending upon the configuration of the support framework , are required to provide a larger track for increased stability . the wheels 32 are also required to be impact resistant and resistant to seasonal changes in temperature , uv light , and deterioration of material through oxidation , etc . the diameter of the wheels 32 is preferred to be small to retain the low center of gravity of the fire pit holder 10 , especially when in motion . the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof and , accordingly , the described embodiments are to be considered in all respects as being illustrative and not restrictive , with the scope of the invention being indicated by the appended claims , rather than the foregoing detailed description , as indicating the scope of the invention as well as all modifications which may fall within a range of equivalency which are also intended to be embraced therein .