CA2040347A1 - Preformed concrete step kit - Google Patents
Preformed concrete step kitInfo
- Publication number
- CA2040347A1 CA2040347A1 CA 2040347 CA2040347A CA2040347A1 CA 2040347 A1 CA2040347 A1 CA 2040347A1 CA 2040347 CA2040347 CA 2040347 CA 2040347 A CA2040347 A CA 2040347A CA 2040347 A1 CA2040347 A1 CA 2040347A1
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- Canada
- Prior art keywords
- panels
- relation
- stair
- stringer
- riser
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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- Steps, Ramps, And Handrails (AREA)
Abstract
TITLE
PREFORMED CONCRETE STEP KIT
ABSTRACT
A kit is provided which comprises mutually unattached ones of an at least one stair stringer panel, an at least one stair riser panel, and an at least one stair tread panel. Each of these panels is independently preformed from concrete material. The stringer panel is adapted to receive the tread and riser panels in at least partially supported relation thereon, with an at least one of the riser and tread panels be co-joinable in tensioned relation with the stringer panel.
PREFORMED CONCRETE STEP KIT
ABSTRACT
A kit is provided which comprises mutually unattached ones of an at least one stair stringer panel, an at least one stair riser panel, and an at least one stair tread panel. Each of these panels is independently preformed from concrete material. The stringer panel is adapted to receive the tread and riser panels in at least partially supported relation thereon, with an at least one of the riser and tread panels be co-joinable in tensioned relation with the stringer panel.
Description
21~3~7 FIE~D OF TIIE I~JENTIO~:
The present invention relates to preformed concrete steps; in particular to an assemblage of stair components useful in the construction of same; and, ~specially to a readily transportable kit of such components, adapted to be assembled in situ.
BACRGROUND OF TIIB INVENTION:
In many forms of construction, the need arises to accommodate pedestrian traffic in transcending between a grade level and an entry way. In residential housing construction, for example, both front and rear entries are typically arranged above grade, and access has often been heretofore faoilitated by way of unitary, precast concrete stairs.
Concrete is the material o~ choice with respect to its durability, and stability in such applications. Its weight is, however, a considerable disadvantage in that special equipment is often required to install a stair way of any appreciable size. This, in general, relegates the installation, (or removal), of precast unit stairways to contractors having ac~ess to such eguipment. Smaller contractors that are not so privileged, and the "home handyman" are effectively disenfranchised as a consequence. Even in circumstances when appropriate equipment may be available, however, that equipment may damage landscaping and/or necessitate the r moval, however temporarily, of fences or other fixtures.
Moreover, the precast unitary concrete steps aYailable on the market today, are bulky to transport, and consume large am~unts of storage space and hence are seldom maintained in inventory at retail outlets, thereby effectively foreclosing on the retail marketing of such products.
There remains a heretofore unsatisfied need relativs to pre-formed concrete stairs, for produc~s which afford the ~urability and other advantageous qualities of concrete materials without necessarily requiring special installation or handling equipment to emplace stairs formed from precast concrete. There is also a nesd to reduce the transport bulk of stairways to the installation sites, thereby reducing the overall transportation co~ts, and also reducing the negative environmental impact of transportation inefficiency associated with presently available, bulky, unitary precast concrete steps.
8UNNARY OF TH~ INVEN~IO~:
In one aspect of the present invention, there is provided a kit comprising mutually unattached ones of: an at least one stair stringer panel; an at least one stair riser panel; and, an at leask one stair tread panel. Each of these panels are independently preformed from concrete material. The concrete material is preferably a reinforced concrste material, and while various known concrete reinforcements might be used for the present purposes, a fibre reinforced material is preferred. Moreover, although such things as fibre glass reinforcement fibres might be used, it is especially preferred that steel fibres be used. Such fibres are commercially available from, amongst others, Harex Canada Limited, Brant~ord, Ontario.
The stringer panel is adapted to receive the tread and riser , [)347 panels in at least partially supported relation thereon, with an at least one of the riser and tread panels being co-joinable in tensioned relation with the stringer panel.
In another aspec~ of the invention, there is provided an assembled concrete stair comprising an at least one stair ~tringer panel, an at least one stair riser panel, and an at least on stair tread panel. Here again, each of the panels has been independently preformed from concrete material, and the stringer bears the tread and riser panels in at least partially supported relation thereon.
The stair is further structured by way of having at least one of the riser and tread panels co-joined in tensioned relation with the stringer panel.
In typical embodime~lts of the present invention, a pair of such stringer panels will be present in both the abovementioned kit, or the assembled stair. Certainly, embodiments are contemplated in which a stair is to be provided for applications where the steps will travel upwardly along an adjacent wall, foundation, or some other feature which would make the inclusion of a second such stringer redundant to the application. More usually, however, the stair will extend transversely to a wall, foundation, or the like, (usually at riyht angles). In these latter mentioned applications, the second stringer can be advantageously employed in spaced relation from the first, to support the intermediately arranged riser and tread panels therebetween. Although not necessary to such an end, the first and second stringers will typically be arranged proximal to respective ones of opposed ends of the riser and tread panels, as this maximizes the lateral stability of the assembled stairway.
-' :
4~3~7 Preferred embodimen~s will typically employ between one and four steps, and will utilize treads of three, four or six feet wide.
The component parts of the kit and the assembled stair preferably have a number of advantageous attributes. By way of one example, there are a number of advantages to be enjoyed in connection with sxposed aggregate finishes on ~he preformed concrete surfaces. One such advantage relates to the aesthe~ics thak such a ~inish affords.
The other is more functional in nature, in that the exposed aggregate surface affords traction. Note also, that the application of exposed aggregate finishes to precast, unitary stairs, is not accomplished without significant difficulty. In accordanc2 with the present invention, the application of the exposed aggregate finish to the panels is readily accomplished without occasioning any undue difficulties.
Preferably, the stringer and the at least one of the riser and tread panels include anchored attachment means, such as eye-bolts, for example, which are adapted to be bridgingly interconnected by mechanical tensioning means, to thereby co-join the stringer and the at least one of the panels in ten~ioned relation. In a preferred form, the attachment means comprises an eyeobolt having an "eye" at one end with a hook arranged at an opposed end, adapted to be cast in place during the preforming of respective ones of the various panels.
Although any of a varicty of known mechanical tensioning means might be used for the purposes of the present in~ention, a particularly preferred form comprises a turnbuckle, and in particular one having a pair of threaded hooks adapted to be received in hookingly interfering relation by respective oncs of oooperative eye-bolts. The .
The present invention relates to preformed concrete steps; in particular to an assemblage of stair components useful in the construction of same; and, ~specially to a readily transportable kit of such components, adapted to be assembled in situ.
BACRGROUND OF TIIB INVENTION:
In many forms of construction, the need arises to accommodate pedestrian traffic in transcending between a grade level and an entry way. In residential housing construction, for example, both front and rear entries are typically arranged above grade, and access has often been heretofore faoilitated by way of unitary, precast concrete stairs.
Concrete is the material o~ choice with respect to its durability, and stability in such applications. Its weight is, however, a considerable disadvantage in that special equipment is often required to install a stair way of any appreciable size. This, in general, relegates the installation, (or removal), of precast unit stairways to contractors having ac~ess to such eguipment. Smaller contractors that are not so privileged, and the "home handyman" are effectively disenfranchised as a consequence. Even in circumstances when appropriate equipment may be available, however, that equipment may damage landscaping and/or necessitate the r moval, however temporarily, of fences or other fixtures.
Moreover, the precast unitary concrete steps aYailable on the market today, are bulky to transport, and consume large am~unts of storage space and hence are seldom maintained in inventory at retail outlets, thereby effectively foreclosing on the retail marketing of such products.
There remains a heretofore unsatisfied need relativs to pre-formed concrete stairs, for produc~s which afford the ~urability and other advantageous qualities of concrete materials without necessarily requiring special installation or handling equipment to emplace stairs formed from precast concrete. There is also a nesd to reduce the transport bulk of stairways to the installation sites, thereby reducing the overall transportation co~ts, and also reducing the negative environmental impact of transportation inefficiency associated with presently available, bulky, unitary precast concrete steps.
8UNNARY OF TH~ INVEN~IO~:
In one aspect of the present invention, there is provided a kit comprising mutually unattached ones of: an at least one stair stringer panel; an at least one stair riser panel; and, an at leask one stair tread panel. Each of these panels are independently preformed from concrete material. The concrete material is preferably a reinforced concrste material, and while various known concrete reinforcements might be used for the present purposes, a fibre reinforced material is preferred. Moreover, although such things as fibre glass reinforcement fibres might be used, it is especially preferred that steel fibres be used. Such fibres are commercially available from, amongst others, Harex Canada Limited, Brant~ord, Ontario.
The stringer panel is adapted to receive the tread and riser , [)347 panels in at least partially supported relation thereon, with an at least one of the riser and tread panels being co-joinable in tensioned relation with the stringer panel.
In another aspec~ of the invention, there is provided an assembled concrete stair comprising an at least one stair ~tringer panel, an at least one stair riser panel, and an at least on stair tread panel. Here again, each of the panels has been independently preformed from concrete material, and the stringer bears the tread and riser panels in at least partially supported relation thereon.
The stair is further structured by way of having at least one of the riser and tread panels co-joined in tensioned relation with the stringer panel.
In typical embodime~lts of the present invention, a pair of such stringer panels will be present in both the abovementioned kit, or the assembled stair. Certainly, embodiments are contemplated in which a stair is to be provided for applications where the steps will travel upwardly along an adjacent wall, foundation, or some other feature which would make the inclusion of a second such stringer redundant to the application. More usually, however, the stair will extend transversely to a wall, foundation, or the like, (usually at riyht angles). In these latter mentioned applications, the second stringer can be advantageously employed in spaced relation from the first, to support the intermediately arranged riser and tread panels therebetween. Although not necessary to such an end, the first and second stringers will typically be arranged proximal to respective ones of opposed ends of the riser and tread panels, as this maximizes the lateral stability of the assembled stairway.
-' :
4~3~7 Preferred embodimen~s will typically employ between one and four steps, and will utilize treads of three, four or six feet wide.
The component parts of the kit and the assembled stair preferably have a number of advantageous attributes. By way of one example, there are a number of advantages to be enjoyed in connection with sxposed aggregate finishes on ~he preformed concrete surfaces. One such advantage relates to the aesthe~ics thak such a ~inish affords.
The other is more functional in nature, in that the exposed aggregate surface affords traction. Note also, that the application of exposed aggregate finishes to precast, unitary stairs, is not accomplished without significant difficulty. In accordanc2 with the present invention, the application of the exposed aggregate finish to the panels is readily accomplished without occasioning any undue difficulties.
Preferably, the stringer and the at least one of the riser and tread panels include anchored attachment means, such as eye-bolts, for example, which are adapted to be bridgingly interconnected by mechanical tensioning means, to thereby co-join the stringer and the at least one of the panels in ten~ioned relation. In a preferred form, the attachment means comprises an eyeobolt having an "eye" at one end with a hook arranged at an opposed end, adapted to be cast in place during the preforming of respective ones of the various panels.
Although any of a varicty of known mechanical tensioning means might be used for the purposes of the present in~ention, a particularly preferred form comprises a turnbuckle, and in particular one having a pair of threaded hooks adapted to be received in hookingly interfering relation by respective oncs of oooperative eye-bolts. The .
2~ 34L7 hooks are axially aligned with one another in threadingly engaged relation within a complimentary threaded intermediate member. The intermediate member is adapted to be relatively rotatable with respect to both of the hooks, and upon relative rotation of the intermediate member, the hooks are axially positionable in variably mutually spaced relation. Such turnbuckle devices are often employed in guy-wire tensioning applications, and are widely available in both wholesale and retail markets. Galvanized hardware is preferred in all cases.
In addition, moving portions of all such hardware are advantageously greased to facilitate adjustment or dissassembly at a later date, if required.
Turning once a~ain, for the moment, to the earlier contemplatad embodiments of the present invention in which the s~air is intended to run upwardly and parallel along an adjacent foundation wall, or the like, it is noted that the provision of attachment means adapted to be affixed in rigidly anchored relation to a wall of a construction is especially preferred. In such an arranqement, the at least one stringer panel is adapted to be arranged in spaced apart relation from that wall, and an at least one of the riser and tread panels are adapted to be co-join~d through the attachment means to the wall. In an especially preferred form, that co-joining is mediated through mechanical tensioning means, such as for example, the turnbuckle described in the preceding paragraph.
Referring once again to the invention in general, it is preferred that at least one of any two mutually contactiny panels have detent means including an interfering surface adapted to engage a contacting portion of the other of the panels in mutually interfering relation.
: . , ' -03~7 Such a feature results in an at least partially interlockable relationship between the various contacting panels, which in turn enhances the overall stability of the assembled stair.
In an especially advantageous form, interfering surfaces of at least some of the detent means are adapted to act, (in force transferring relation), against the contacting portion when respective one~ of two such panels are arranged in the tensioned relation mentioned above.
Preferred detent means comprise a raised-relief panel portion having an interfering surface comprising an abutment face. The abutment face is in turn adapted to engag~ a portion of a contacting panel in abutting relation.
DETAILED DE8CRIPTION OF T~ INV~N~IO~:
INTRODUCTION TO THE DRAWINGS:
Over the course of the following detailed description of certain preferred embodiments of the pxesent invention, reference will be made to the appended drawings, including:
Figure 1 which is a perspective view of one embodiment of the present invention, illustrating various components thereof in partially exploded relation;:
Figure ~A which is:an ele~ated side view o~ an assembled stair according to the present invention;
Figure lB which is an elevated front view of the assembled stair depicted in Figure lA, w1th the riser panels removed to provide a view of the interior;
Figure lC is~a partially cut oway plan view of the assembled .
: , .~ , ,::
.
,, :, - :
2i~ 47 stair depicted in Figure 1;
~igure 2 which is a perspective view of a tread panel according to the present invention;
~igure 3 which is a perspective view of the backside of a riser panel according to the present invention;
Figure 3A is a cross-section taken through a perspective view of the riser panel depicted in Figure 3, illustrating the manner of anchoring of an alternate attachment means thereto;
Figure 3B is a view of a preferred attachment means cast in phantom in a perspective view of the riser panel depicted in Figure 3;
Figure ~ is an exploded view of a preferred mechanical tensioning means, useful in the practice of the present invention; and, ~igure S is a view, in plan, of the various components of a kit, in accordance with the present invention;
Figures 6 A - F depict various types of joinery useful in conjunction with the present invention.
Referring now to Figures 1, 1 B - C of the drawings, there is depicted in their respective views, a stair 1 in accordance with the present invention, illustrating the intended cooperation between various of the component parts thereof. Each of the illustrated panels has an exposed aggregate finish 2 extending along at least the major presentation surfaces thereo~. A pair of stringer panels 3 and 4 are arranged in upright, laterally mutually spaced apart xelation with a plurality of riser panels 5, 6 and 7, (only riser panel 7 is 2~0347 depicted in Figure 1), arranged in supported relation therebetween.
Tread panels 8, 9, 10 and 11 are also shown in overlaying positions, supported on stringer panels 3 and 4.
Anchored eye-bolts 12 can also be seen from the perspective of Figure 1, positioned along the ma~or hidden surface of stringer panel 4.
Turning to Figure 2 of the drawings, the underside of a representative tread panel 9 is shown, with respective raised relief detents 13 having abutment faces 14 facing oukwardly, from an underhung position proximal to corresponding ones of the laterally opposed ends of tread panel ~. .
Figure 3 is a back view of riser 7 depicting the major hidden face (ie the underside) thereof, replete with raised relief detents 13 and anchored eye-bolts 12. Figure 3A illustrates, by way of a section taken through riser 7, the anchoring of an eye-bolt 12 in a cooperatively threaded insert 12a. Preferably, insert 12a is cast in place during the preforming of the riser 7, or other panels similarly equipped with same. Nevertheless, such inserts could be installed latterly if desired.
Figure 4 of the drawings shows a preferred mechanical tensioning means, comprising a stylized "guy-rope" tensioning device 15, in which a pair of hooks 16 are threaded into opposed ends o~ an intermedîate body 17. In known manner, the rotation of body 17 in one direction (see directional arrow 19~, results in the mutual axial displacement of hooks 16 along a path in an axially convergent direction indicated by arrows 20. Slot 18, extending through opposed sides of body 17, is adapted to admit a lever arm, not shown, which can then be employed - ~ ' ' ': -' 3a~
to mechanical advantage in tensioning the device during erecti~n of the stairs.
Re~erring now to the drawings in general, but to Figure 5 in particular, there is illustrated a pre~erred embodiment in which a kit is erected into an assembled s~air in accordance with the present invention. A pair of stringer panels 3 and 4 are generally positioned at prsdetermined mutually laterally spaced apart positions, and in an upright orientation. An upp~rmost stringer panel 7 is then positioned in supported relation on and between the upright stringer panels 3 and 4. Abutting faces 14 of the respective detents 13 (arranged near opposed, laterally spaced apart ends of riser 7), are brought, in turn, into abutting relation with contacting portions of the major hidden surfaces of the respective side panels 3 and 4. Tensioning means 15 are hookingly engaged between adjacent pairs of eye-bolts, one of each pair being anchored to the riser panel 7, and the other being anchored to respective ones of the side panels 3 and 4.
Rotation of body member 17 in the manner hereinabove described brings the abutment faces 14 into tensioned contacting relation with corresponding ones of the contacting portions of panels 3 and 4.
Tread 11 is then laid in supported relation on the upright stringer panels 3 and 4, adjacent the rear thereof. Tensioning means 15 are then hookingly engaged between adjacent pairs of proximal eye-bolts. One of each such eye-bolt pair is disposed in anchored rela~ion on tread panel 11, whlle the others are likPwlse disposed on respective ones of stringer panels 3 and 4. In the same manner as described at the end on the last preceding paragraph, the tensioning means are then rotatably adjusted to bring the abutment faces 14 of ' . . .. . ,~ :
. .. :
.
.
34~
detents 13 on tread panel 11, into the dssired tensio~ed contacting relation with corresponding ones of th~ adjacent sontacting surface portions o~ panels 3 and 4.
Risers 5 and 6 ara then secured in like manner to riser 7, following which ~read panels 8, 9 and 10 are laid into place. Note that a detent, shown in Figure 2 as detent 13a, on each of tread panels 8, 9 and 10 are advantageously employed in helping to secure the tread panels arranged on the assembled stair, against removal other than by way of a deliberate lifting motion.
While the actual order o~ assembly is not critical to the end result, the above described order ~acilitates access to the tensioning means during the erection of the stair in situ, and is for at least that reason, advantageous.
Figures 6 A - F illustrate in respective elevated perspective and top plan views, ones of raised inset detent means, (Figures 6 A
and B); lap joint detent means, (Figures 6 C and D); and, rabbeted joint detent means, (Figures 6 E and F).
In addition, moving portions of all such hardware are advantageously greased to facilitate adjustment or dissassembly at a later date, if required.
Turning once a~ain, for the moment, to the earlier contemplatad embodiments of the present invention in which the s~air is intended to run upwardly and parallel along an adjacent foundation wall, or the like, it is noted that the provision of attachment means adapted to be affixed in rigidly anchored relation to a wall of a construction is especially preferred. In such an arranqement, the at least one stringer panel is adapted to be arranged in spaced apart relation from that wall, and an at least one of the riser and tread panels are adapted to be co-join~d through the attachment means to the wall. In an especially preferred form, that co-joining is mediated through mechanical tensioning means, such as for example, the turnbuckle described in the preceding paragraph.
Referring once again to the invention in general, it is preferred that at least one of any two mutually contactiny panels have detent means including an interfering surface adapted to engage a contacting portion of the other of the panels in mutually interfering relation.
: . , ' -03~7 Such a feature results in an at least partially interlockable relationship between the various contacting panels, which in turn enhances the overall stability of the assembled stair.
In an especially advantageous form, interfering surfaces of at least some of the detent means are adapted to act, (in force transferring relation), against the contacting portion when respective one~ of two such panels are arranged in the tensioned relation mentioned above.
Preferred detent means comprise a raised-relief panel portion having an interfering surface comprising an abutment face. The abutment face is in turn adapted to engag~ a portion of a contacting panel in abutting relation.
DETAILED DE8CRIPTION OF T~ INV~N~IO~:
INTRODUCTION TO THE DRAWINGS:
Over the course of the following detailed description of certain preferred embodiments of the pxesent invention, reference will be made to the appended drawings, including:
Figure 1 which is a perspective view of one embodiment of the present invention, illustrating various components thereof in partially exploded relation;:
Figure ~A which is:an ele~ated side view o~ an assembled stair according to the present invention;
Figure lB which is an elevated front view of the assembled stair depicted in Figure lA, w1th the riser panels removed to provide a view of the interior;
Figure lC is~a partially cut oway plan view of the assembled .
: , .~ , ,::
.
,, :, - :
2i~ 47 stair depicted in Figure 1;
~igure 2 which is a perspective view of a tread panel according to the present invention;
~igure 3 which is a perspective view of the backside of a riser panel according to the present invention;
Figure 3A is a cross-section taken through a perspective view of the riser panel depicted in Figure 3, illustrating the manner of anchoring of an alternate attachment means thereto;
Figure 3B is a view of a preferred attachment means cast in phantom in a perspective view of the riser panel depicted in Figure 3;
Figure ~ is an exploded view of a preferred mechanical tensioning means, useful in the practice of the present invention; and, ~igure S is a view, in plan, of the various components of a kit, in accordance with the present invention;
Figures 6 A - F depict various types of joinery useful in conjunction with the present invention.
Referring now to Figures 1, 1 B - C of the drawings, there is depicted in their respective views, a stair 1 in accordance with the present invention, illustrating the intended cooperation between various of the component parts thereof. Each of the illustrated panels has an exposed aggregate finish 2 extending along at least the major presentation surfaces thereo~. A pair of stringer panels 3 and 4 are arranged in upright, laterally mutually spaced apart xelation with a plurality of riser panels 5, 6 and 7, (only riser panel 7 is 2~0347 depicted in Figure 1), arranged in supported relation therebetween.
Tread panels 8, 9, 10 and 11 are also shown in overlaying positions, supported on stringer panels 3 and 4.
Anchored eye-bolts 12 can also be seen from the perspective of Figure 1, positioned along the ma~or hidden surface of stringer panel 4.
Turning to Figure 2 of the drawings, the underside of a representative tread panel 9 is shown, with respective raised relief detents 13 having abutment faces 14 facing oukwardly, from an underhung position proximal to corresponding ones of the laterally opposed ends of tread panel ~. .
Figure 3 is a back view of riser 7 depicting the major hidden face (ie the underside) thereof, replete with raised relief detents 13 and anchored eye-bolts 12. Figure 3A illustrates, by way of a section taken through riser 7, the anchoring of an eye-bolt 12 in a cooperatively threaded insert 12a. Preferably, insert 12a is cast in place during the preforming of the riser 7, or other panels similarly equipped with same. Nevertheless, such inserts could be installed latterly if desired.
Figure 4 of the drawings shows a preferred mechanical tensioning means, comprising a stylized "guy-rope" tensioning device 15, in which a pair of hooks 16 are threaded into opposed ends o~ an intermedîate body 17. In known manner, the rotation of body 17 in one direction (see directional arrow 19~, results in the mutual axial displacement of hooks 16 along a path in an axially convergent direction indicated by arrows 20. Slot 18, extending through opposed sides of body 17, is adapted to admit a lever arm, not shown, which can then be employed - ~ ' ' ': -' 3a~
to mechanical advantage in tensioning the device during erecti~n of the stairs.
Re~erring now to the drawings in general, but to Figure 5 in particular, there is illustrated a pre~erred embodiment in which a kit is erected into an assembled s~air in accordance with the present invention. A pair of stringer panels 3 and 4 are generally positioned at prsdetermined mutually laterally spaced apart positions, and in an upright orientation. An upp~rmost stringer panel 7 is then positioned in supported relation on and between the upright stringer panels 3 and 4. Abutting faces 14 of the respective detents 13 (arranged near opposed, laterally spaced apart ends of riser 7), are brought, in turn, into abutting relation with contacting portions of the major hidden surfaces of the respective side panels 3 and 4. Tensioning means 15 are hookingly engaged between adjacent pairs of eye-bolts, one of each pair being anchored to the riser panel 7, and the other being anchored to respective ones of the side panels 3 and 4.
Rotation of body member 17 in the manner hereinabove described brings the abutment faces 14 into tensioned contacting relation with corresponding ones of the contacting portions of panels 3 and 4.
Tread 11 is then laid in supported relation on the upright stringer panels 3 and 4, adjacent the rear thereof. Tensioning means 15 are then hookingly engaged between adjacent pairs of proximal eye-bolts. One of each such eye-bolt pair is disposed in anchored rela~ion on tread panel 11, whlle the others are likPwlse disposed on respective ones of stringer panels 3 and 4. In the same manner as described at the end on the last preceding paragraph, the tensioning means are then rotatably adjusted to bring the abutment faces 14 of ' . . .. . ,~ :
. .. :
.
.
34~
detents 13 on tread panel 11, into the dssired tensio~ed contacting relation with corresponding ones of th~ adjacent sontacting surface portions o~ panels 3 and 4.
Risers 5 and 6 ara then secured in like manner to riser 7, following which ~read panels 8, 9 and 10 are laid into place. Note that a detent, shown in Figure 2 as detent 13a, on each of tread panels 8, 9 and 10 are advantageously employed in helping to secure the tread panels arranged on the assembled stair, against removal other than by way of a deliberate lifting motion.
While the actual order o~ assembly is not critical to the end result, the above described order ~acilitates access to the tensioning means during the erection of the stair in situ, and is for at least that reason, advantageous.
Figures 6 A - F illustrate in respective elevated perspective and top plan views, ones of raised inset detent means, (Figures 6 A
and B); lap joint detent means, (Figures 6 C and D); and, rabbeted joint detent means, (Figures 6 E and F).
Claims (20)
1) A kit comprising mutually unattached ones of an at least one stair stringer panel, an at least one stair riser panel, and an at least one stair tread panel, said panels being independently preformed from concrete material, wherein said stringer is adapted to receive said tread and riser panels in at least partially supported relation thereon, with an at least one of said riser and tread panels be co-joinable in tensioned relation with said stringer panel.
2) The kit according to claim 1 wherein there is included a pair of stair stringer panels adapted to be arranged in mutually spaced apart relation, proximal to respective ones of opposed ends of each of said riser and tread panels.
3) The kit according to claim 1 wherein said concrete material has an exposed aggregate finish.
4) The kit according to claim 1 wherein said stringer and said at least one of said riser and tread panels include anchored attachment means adapted to be bridgingly interconnected by mechanical tensioning means, to thereby co-join said stringer and said at least one of said panels in said tensioned relation.
5) The kit according to claim 1, further including attachment means adapted to be affixed in rigidly anchored relation to a wall of a construction, whereby said at least one stringer panel is adapted to be arranged in spaced apart relation from said wall, and an at least one of said riser and tread panels are adapted to be co-joined through said attachment means to said wall.
6) The kit according to claims 4 or 5 wherein said anchored attachment means comprises an eye-bolt.
7) The kit according to claim 6 wherein said mechanical tensioning means comprises a pair of threaded hooks adapted to be received in hookingly interfering relation by respective ones of said eye-bolts, said hooks being axially aligned with one another in threadingly engaged relation within a complimentary threaded intermediate member adapted to be relatively rotatable with respect to both said hooks, and whereby upon relative rotation of said intermediate member, said hooks are axially positionable in variably mutually spaced relation.
8) The kit according to claim 1 wherein an at least one of any two mutually contacting panels having detent means having an interfering surface adapted to engage a contacting portion of the other of said panels in mutually interfering relation.
9) The kit according to claim 8 wherein interfering surfaces of said detent means are adapted to act against said contacting portion when said panels are arranged in said tensioned relation.
10) The kit according to claim 8 wherein said detent means comprises a raised-relief portion on said an at least one of any two contacting panels, said raised-relief portion having an interfering surface comprising an abutment face adapted to receive said contacting portion in abutting relation therewith.
11) An assembled concrete stair comprising an at least one stair stringer panel, an at least one stair riser panel, and an at least one stair tread panel, said panels each having been independently preformed from concrete material, wherein said stringer bears said tread and riser panels in at least partially supported relation thereon, with an at least one of said riser and tread panels being co-joined in tensioned relation with said stringer panel.
12) The stair according to claim 11 wherein a pair of stair stringer panels are arranged in mutually spaced apart relation, proximal to respective ones of opposed ends of each of said riser and tread panels.
13) The stair according to claim 11 wherein said concrete material has an exposed aggregate finish.
14) The stair according to claim 11 wherein said stringer and said at least one of said riser and tread panels include anchored attachment means bridgingly interconnected by mechanical tensioning means co-joined between said stringer and said at least one of said panels to secure same in said tensioned relation.
15) The stair according to claim 11, further including attachment means affixed in rigidly anchored relation to a wall of a construction, with said at least one stringer panel arranged in spaced apart relation from said wall, and an at least one of said riser and tread panels co-joined through said attachment means to said wall.
16) The stair according to claims 14 or 15 wherein said anchored attachment means comprises an eye-bolt.
17) The stair according to claim 16 wherein said mechanical tensioning means comprises a turnbuckle having a pair of threaded hooks in hookingly interfering relation with respective ones of said eye-bolts, said hooks being axially aligned with one another in threadingly engaged relation within a complimentary threaded intermediate member adapted to be relatively rotatable with respect to both said hooks, and whereby upon relative rotation of said intermediate member, said hooks are axially positionable in variably mutually spaced relation, to conjoin the parts in mutually tensioned relation.
18) The stair according to claim 11 wherein an at least one of any two mutually contacting panels has detent means having an interfering surface engaging a contacting portion of the other of said panels in mutually interfering relation.
19) The stair according to claim 18 wherein interfering surfaces of said detent means act against said contacting portion with said panels being arranged in said tensioned relation.
20) The stair according to claim 18 wherein said detent means comprises a raised-relief portion on said an at least one of any two contacting panels, said raised-relief portion having an interfering surface comprising an abutment face receiving said contacting portion in abutting relation therewith.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2040347 CA2040347A1 (en) | 1991-04-12 | 1991-04-12 | Preformed concrete step kit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2040347 CA2040347A1 (en) | 1991-04-12 | 1991-04-12 | Preformed concrete step kit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2040347A1 true CA2040347A1 (en) | 1992-10-13 |
Family
ID=4147389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2040347 Abandoned CA2040347A1 (en) | 1991-04-12 | 1991-04-12 | Preformed concrete step kit |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2040347A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2502691A (en) * | 2012-04-19 | 2013-12-04 | George Owen | Access walkway with non-slip flooring |
-
1991
- 1991-04-12 CA CA 2040347 patent/CA2040347A1/en not_active Abandoned
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2502691A (en) * | 2012-04-19 | 2013-12-04 | George Owen | Access walkway with non-slip flooring |
| GB2502691B (en) * | 2012-04-19 | 2018-03-28 | Owen George | An access assembly |
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| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |