unless otherwise explained , any technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs . the singular terms “ a ”, “ an ”, and “ the ” include plural referents unless the context clearly indicates otherwise . similarly , the word “ or ” is intended to include “ and ” unless the context clearly indicates otherwise . although methods and materials similar or equivalent to those described herein can be used in the practice or testing of this disclosure , suitable methods and materials are described below . the term “ comprises ” means “ includes .” all publications , patent applications , patents , and other references mentioned herein , if any , are incorporated by reference in their entirety for all purposes . in case of conflict , the present specification , including explanations of terms , will control . in addition , the materials , methods , and examples are illustrative only and not intended to be limiting . referring generally to fig1 - 17 , in a preferred embodiment , a system for constructing mazes includes a plurality of panels 100 . each panel includes a sub - frame 210 , a pair of vertically extendable posts or tubes 218 terminating with a pads 224 for tensionable contact with a ceiling and a pair of foot pads 226 for contact with a floor . the vertically extendable posts are tensioned against the ceiling by a handle 222 pivoting within a fixed saddle that surrounds a notched 220 post in the manner of a ratcheting jack . while in the preferred embodiment shown herein , the posts are cylindrical and move vertically within tubular guides 216 , polygonal channel of any rigid material may be employed for the posts without departing from the claimed invention . fig1 is a isometric view of a sheathed panel . preferably , flanges strips 230 are formed with the profile shown in ( fig2 ). in one preferred embodiment herein , each flange strip is generally co - planar with opposite sides of the panel . fig3 is a front plan view of a panel sub - frame wherein post guides 216 are attached , typically by welding , along the vertical sides . the post guides are tubular sections that maintain alignment of extendable posts 218 . fig4 and 5 are respectively , top edge and vertical edge views of the sub - frame of ( fig3 ). fig6 is an enlarged detail view of call - out ( 6 ) of ( fig3 ), and shows a tubular guide mounted to sub - frame 210 . moving to fig7 and 8 , a pair of extendable posts 218 with ceiling pads 224 , a pair of corresponding pivoting handles 222 for ratcheting the posts and foot pads 226 are added to the sub - frame . fig9 is a side detail view of a ceiling pad . preferably , the corrugated surface of the pads is elastomeric to resist lateral movement when pressed against a ceiling . fig1 is a front detail view of a section of extendable post with notches 220 to receive a pawl and catch . fig1 is an enlarged side view of a handle / lever and saddle 222 for vertically ratcheting the extendable post . note that sheathing 228 is absent over the handles which are recessed slightly away from the panel face and edges . fig1 is a front detail view of a handle . fig1 is a detail view of a corner foot pad 226 . while the embodiment shown depicts a ladder type sub - frame ( fig3 and 7 ), other sub - frame configurations may be employed without departing from the claimed invention . fig1 is a top down view of a group of 4 panels positioned at 90 degree angles . fig1 is a top down view of a pair of panels abutting along flange strips 230 . fig1 and 17 depict possible panel arrangements . in fig1 , the flange strips are reversed so that each projecting flange is generally co - planar with opposite faces of a panel , whereas , in fig1 , both flange strips are generally co - planar with a single face of the panel . fig1 depicts an embodiment that employs a pair of jack screws 240 ; one each at the upper corners of the panel . the jack screws have a ceiling pad at one end , and are held in place by a fixed threaded channel ( not shown ) within the panel , which is typically welded to the side rails . the extendable length of the jack screws can vary , but is sufficient to brace the panel against a ceiling when extended . a threaded collar / nut 250 is used to lock the jack screws when at the desired length . it should be understood that the drawings and detailed description herein are to be regarded in an illustrative rather than a restrictive manner , and are not intended to be limiting to the particular forms and examples disclosed . the configuration of a handle , or grip of the panel can be of any design and can be for one or two - handed operation . the panel can be of any length or width , hollow , or filled with insulation or other material . the sheathing may be attached to the sub - frame by any means including spot welding , fasteners , adhesives or magnetically as will be appreciated by those having skill in the art . although the present invention is directed to fire safety applications , other applications , for example , police and military training environments and other installations will suggest themselves to those having skill in the art . accordingly , it is intended that this disclosure encompass any further modifications , changes , rearrangements , substitutions , alternatives , design choices , and embodiments as would be appreciated by those of ordinary skill in the art having benefit of this disclosure , and falling within the spirit and scope of the following claims .
a maze construction system for fire and rescue training exercises includes a plurality of panels that are tensionably supported between a ceiling and floor . each panel includes a pair of extendable columns that terminate with a pad for contact with a ceiling surface . a flange along at least one vertical edge of the panels permits the panels to align at their edges . the panels are quickly assembled and disassembled , and are easily reconfigured to form new maze paths without requiring additional tools .