CA2039437A1 - Positioning apparatus for embedding items in concrete - Google Patents
Positioning apparatus for embedding items in concreteInfo
- Publication number
- CA2039437A1 CA2039437A1 CA 2039437 CA2039437A CA2039437A1 CA 2039437 A1 CA2039437 A1 CA 2039437A1 CA 2039437 CA2039437 CA 2039437 CA 2039437 A CA2039437 A CA 2039437A CA 2039437 A1 CA2039437 A1 CA 2039437A1
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- Prior art keywords
- concrete
- elongated
- anchor bolt
- hole
- finger
- 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.)
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Abstract
ABSTRACT OF THE DISCLOSURE
An apparatus which attaches to a single form board for positioning items so that they may subsequently be embedded in concrete is disclosed. A holding device includes a fastener which attaches to an exterior vertical surface of the form board. A wrench receiver rigidly attaches to the fastener and rests upon a top surface of the form board. A wrench slidably mates with the wrench receiver and projects horizontally toward the interior of the form. The wrench includes a nut, into which an anchor bolt may be threaded. A cradle may be installed on the anchor bolt for positioning and tying reinforcing bar (rebar) relative to the anchor bolt. The cradle includes a spacer which has a bolt hole into which the anchor bolt fits. The bolt hole is dimensioned so that the cradle may slide on the anchor bolt, but binds against the anchor bolt when it in not positioned perpendicular to the anchor bolt. The cradle additionally includes a finger which causes the cradle to have a "V" shape. The rebar may be retained in the point of the "V". In addition, the cradle has a rebar hole for receiving rebar. The rebar hole is configured in cooperation with the finger so that when rebar fits through the rebar hole and rests on the finger while the cradle is installed on an anchor bolt, the rebar is substantially horizontal.
An apparatus which attaches to a single form board for positioning items so that they may subsequently be embedded in concrete is disclosed. A holding device includes a fastener which attaches to an exterior vertical surface of the form board. A wrench receiver rigidly attaches to the fastener and rests upon a top surface of the form board. A wrench slidably mates with the wrench receiver and projects horizontally toward the interior of the form. The wrench includes a nut, into which an anchor bolt may be threaded. A cradle may be installed on the anchor bolt for positioning and tying reinforcing bar (rebar) relative to the anchor bolt. The cradle includes a spacer which has a bolt hole into which the anchor bolt fits. The bolt hole is dimensioned so that the cradle may slide on the anchor bolt, but binds against the anchor bolt when it in not positioned perpendicular to the anchor bolt. The cradle additionally includes a finger which causes the cradle to have a "V" shape. The rebar may be retained in the point of the "V". In addition, the cradle has a rebar hole for receiving rebar. The rebar hole is configured in cooperation with the finger so that when rebar fits through the rebar hole and rests on the finger while the cradle is installed on an anchor bolt, the rebar is substantially horizontal.
Description
;~139~37 ....
The present invention relates generally to deYices for positioning items, such as anchor bolts and reinforcement bars, within a form for their subsequent embedment within concrete. ~ore speci~ically, the present invention relates to devices which rigidly secure such items to a single ~or~
board.
In the formation of building foundations and the like, builders typically embed various items within concrete portions of the foundation. The foundations are formed by pouring wet concrete into an interior portion of a form, and the embedded items are either positioned within the form prior to ~he pouring of the concrete or poked into the concr~te before tne concrete hardens~ Steel reinforcing bars trebar) are usually embedded to strengthen the resulting foundation.
In addition, anchor bolts, also known as "~-bolts," are often partially embedded in the foundation. Exposed portions of anchor bolts serve to attach a building or other structure to the foundation.
Many foundations utilize a relatively narrow form. In other words, the distance between non-collinear for~ boards is relatively short. Due to this short distance, numerous devices have been developed which rest upon opposing or perpendicular form boards and which suspend embedable items from such devices between the form boards. Such devices are believed to wor~ acceptably well in applications where these form boards are positioned close together.
However, in the southwestern regions of the United States and in other locations, common building practices call for monolithic slab foundations. Monoli~hic slab foundationS
represent vast, contiguous concrete floors which underlie all, , .
The present invention relates generally to deYices for positioning items, such as anchor bolts and reinforcement bars, within a form for their subsequent embedment within concrete. ~ore speci~ically, the present invention relates to devices which rigidly secure such items to a single ~or~
board.
In the formation of building foundations and the like, builders typically embed various items within concrete portions of the foundation. The foundations are formed by pouring wet concrete into an interior portion of a form, and the embedded items are either positioned within the form prior to ~he pouring of the concrete or poked into the concr~te before tne concrete hardens~ Steel reinforcing bars trebar) are usually embedded to strengthen the resulting foundation.
In addition, anchor bolts, also known as "~-bolts," are often partially embedded in the foundation. Exposed portions of anchor bolts serve to attach a building or other structure to the foundation.
Many foundations utilize a relatively narrow form. In other words, the distance between non-collinear for~ boards is relatively short. Due to this short distance, numerous devices have been developed which rest upon opposing or perpendicular form boards and which suspend embedable items from such devices between the form boards. Such devices are believed to wor~ acceptably well in applications where these form boards are positioned close together.
However, in the southwestern regions of the United States and in other locations, common building practices call for monolithic slab foundations. Monoli~hic slab foundationS
represent vast, contiguous concrete floors which underlie all, , .
2 ~:0~ 37 or at least major portions, of their buildings. The monolithic slab foundations are formed on~site using a ~orm in which the distance between non-collinear form boards is relatively great. For a typical single family house, this distance usually spans the entire length or width of the house. Thus, for monolithic slabs, the use of conventional devices which suspend e~bedable items between form boards is totally impractical.
As a consequence, make-shift techniques are often devised to embed items in monolithic slab foundations.
Conventionally, rebar is positioned by attaching the rebar to wooden staXes or other convenient items prior to the pouring of concrete. As a result, this positioning is typically a time consuming, costly, and yet imprecise task in the construction of a foundation.
Make-shift techniques and devices have also been devised for suspending anchor bolts in a cantilever fashion from a single form board. However, such make-shift techniques and devices have proven unsatisfactory. Typically, conventional make-shift suspending devices are either too flimsy or attach to the for~ boa~d too unsubstantially to adequately hold an anchor bolt. Consequently, anchor bolts tend to sag or otherwise come out of alignment under their own weight, when jostled by normal construction activities, or when bumped by concrete buffing machines. As a result, such make-shift devices tend not to be used at all.
Rather, anchor bolts are typically stabbed into wet concrete soon after the concrete has been poured. The stabbing of anchor bolts into wet concrete is particularly undesirable for several reasons. For example, the anchor bolts cannot be positively tied into the rebar structure of the foundation. Failure to tie anchor bolts into a rebar structure severely diminishes the building's overall strength and ability to withstand earthguakes. Moreover, inspec~ion of 3 ~ 3~
embedded portions of anchor bolts is impossible after concrete has been poured.
In addition, the stabbing of anchor bolts into wet concrete is a slow, tedious, and generally unsatisfactory process. Precise measurements are required to correctly position the anchor bolts. For example, the height of the anchor bolts above the concrete, the angle of the anchor bolts projecting out from concrete, and the positioning of the anchor bolts within the form must all be set for each anchor bolt. Then, timing considerations complicate the process. If the concrete is too wet when the anchor bolt is stabbed, the ', anchor bolt tends to sag or fall over. If the concrete is too hard when the anchor bolt is stabbed, embedding the anchor bolt and adequately molding the concrete around the anchor bolt become difficult. As a result of the numerous problems associated with stabbing anchor bolts into wet concrete, frequent rework is required. Slnce this rewGrk doesn't occur until after the concrete has hardened, it is time consuming, difficult and expensive.
Accordingly, it is an advantage of the present invention that an improved apparatus for posi~ioning ite~s for subsequent embedment in concrete is provided.
Another advantage of the present invention is that a cantilever apparatus is provided so that items may be positioned relative to a single form board. ~hus, the present invention is useful in the construction of monolithic slab foundations, as well as other concrete structures.
Yet another advantage is that the present invention represents a positioning apparatus which rigidly holds items, ; e.g. anchor bolts. Thus, such items tend to remain in place throughout the formation of a ~oundation.
Still another advantage is that the present invention is capable o~ rigidly supporting su~stantial weight in addition - .:
. , .
As a consequence, make-shift techniques are often devised to embed items in monolithic slab foundations.
Conventionally, rebar is positioned by attaching the rebar to wooden staXes or other convenient items prior to the pouring of concrete. As a result, this positioning is typically a time consuming, costly, and yet imprecise task in the construction of a foundation.
Make-shift techniques and devices have also been devised for suspending anchor bolts in a cantilever fashion from a single form board. However, such make-shift techniques and devices have proven unsatisfactory. Typically, conventional make-shift suspending devices are either too flimsy or attach to the for~ boa~d too unsubstantially to adequately hold an anchor bolt. Consequently, anchor bolts tend to sag or otherwise come out of alignment under their own weight, when jostled by normal construction activities, or when bumped by concrete buffing machines. As a result, such make-shift devices tend not to be used at all.
Rather, anchor bolts are typically stabbed into wet concrete soon after the concrete has been poured. The stabbing of anchor bolts into wet concrete is particularly undesirable for several reasons. For example, the anchor bolts cannot be positively tied into the rebar structure of the foundation. Failure to tie anchor bolts into a rebar structure severely diminishes the building's overall strength and ability to withstand earthguakes. Moreover, inspec~ion of 3 ~ 3~
embedded portions of anchor bolts is impossible after concrete has been poured.
In addition, the stabbing of anchor bolts into wet concrete is a slow, tedious, and generally unsatisfactory process. Precise measurements are required to correctly position the anchor bolts. For example, the height of the anchor bolts above the concrete, the angle of the anchor bolts projecting out from concrete, and the positioning of the anchor bolts within the form must all be set for each anchor bolt. Then, timing considerations complicate the process. If the concrete is too wet when the anchor bolt is stabbed, the ', anchor bolt tends to sag or fall over. If the concrete is too hard when the anchor bolt is stabbed, embedding the anchor bolt and adequately molding the concrete around the anchor bolt become difficult. As a result of the numerous problems associated with stabbing anchor bolts into wet concrete, frequent rework is required. Slnce this rewGrk doesn't occur until after the concrete has hardened, it is time consuming, difficult and expensive.
Accordingly, it is an advantage of the present invention that an improved apparatus for posi~ioning ite~s for subsequent embedment in concrete is provided.
Another advantage of the present invention is that a cantilever apparatus is provided so that items may be positioned relative to a single form board. ~hus, the present invention is useful in the construction of monolithic slab foundations, as well as other concrete structures.
Yet another advantage is that the present invention represents a positioning apparatus which rigidly holds items, ; e.g. anchor bolts. Thus, such items tend to remain in place throughout the formation of a ~oundation.
Still another advantage is that the present invention is capable o~ rigidly supporting su~stantial weight in addition - .:
. , .
4 ~ 3~
to an anchor bolt. Thus, rebar may be directly tied to and supported by the present invention.
Another advantage is that the present invention permits the tying of rebar to an anchor bolt in numerous diverse configurations.
The terms "vertical" and "horizontal" are used herein as relative terms to describe items whose orientations are generally similar to or are substantially different from one another. Those skilled in the art will recognize that only general orientations and not precise orientations relative to the direction of force exerted by gravity are implied. In other words, as used herein ~vertical" and "horizontal" refer to directions which may differ considerably from precisely vertical and precisely horizontal orientations, respectively.
While the terms 'Ivertical~ and "horizontal" apply to orientations of items during normal usage of the present invention, those skilled in the art will further recognize that all such items may, in other circumstances, be physically orien~ed so that "vertical" items extend precisely ~0 "horizontal" and vice-versa.
The above and other advantages of the present invention are carried out in one form by an apparatus which rigidly positions an anchor bolt alongside an interior vertical surface of a form board. The anchor bolt may thereafter be embedded in concrete. The apparatus includes a member which extends in a generally vertical direction when sPcured to an exterior vertical surface of the form board. In addition, the apparatus includes a member which extends in a generally horizontal dixection when the appara~us is secured to the form board. The horizontally extending member rigidly attaches to the vertically extending member at substantially a perpendicular angle. Moreover, the horizontally extending member is configured to rest upon a top horizontal surface of the form board. The apparatus also includes a device which : ' , 2~9~317 couples to the horizontally extending member to releasably hold the anchor bolt.
In the accompanying drawings: .
FIGURE 1 shows a perspective Vi2W of a holding device constructed in accordance with the teaching of the present invention and attached to a form board;
FIGURE 2 shows a cross-sectional side view of a ~irst embodiment of the holding device of the present invention;
FIGURE 3 shows an exploded, perspective view of a first embodiment of the holding device of the present invention;
FIGURE 4 shows an exploded, perspective view of a second embodiment of the holding device of the present invention;
FIGURE 5 shows a cross-sectional side view of the second embodiment of the holding device of the present invention;
FIGURE 6 shows the present invention operated to position anchor bolts for embedment in concrete and attachment to a column;
FIGURE 7 shows a cross-sectional side view of the present invention taken about line 1--7 of FIGURE 6;
: FIGURE 8 shows the holding device of the present invention installed on a one-by form board;
FIGURE 9 shows the holding device of the present invention supporting a curtain wall of rebar;
FIGURE 10 shows a perspective view of a cradle portion of the present invention supporting a rebar in a first orientation;
:: FIGURE 11 shows a side view of the cradle portion of the ~ present invention supporting a rebar in the ~rst orientation;
, ,, , Z~3~3~3~
FIGURE 12 shows a perspective view of the cradle portion of the present invention supporting a rebar in a second orientation;
FIGURE 13 shows a side view of the cradle portion of the present invention supporting a rebar in the second orientation; and FIGURE 14 shows a cross-sectional side view taken about line 1~--14 of FIGURE 12.
In accordance with the teaching of the present invention, FIGURES 1-3 show a first embodiment of a holding device 10, which is used to position items for embedment in concrete 12.
For the purposes of the present invention, concrete 12 may, but need not necessarily, represent a monolithlc slab foundation. Holding device 10 positions a conventional anchor bolt 14 relative to a conventional 'itwo-by" (ie. 2 X 6, 2 X 8, X 10, etc.) form board 16. As is conventional, form board 16 serves as one stop in a form 18 into which concrete 12 is poured while in a wet state. When concrete 12 hardens, form 18, including form board 16, is removed and concrete 12 retains the shape (not shown) defined by form 18.
With specific reference to FIGURE 3, holding device 10 includes a wrench 20, a wrench receiver 22, a thumb-screw 24, and a steel strap 26. In the preferred embodiments, strap 26 is approximately 3/16 inch thic~ steel that is approximately 3/4 inch wide. Strap 26 is bent into a fastener 28, a spacer 30, and 2n elevator 32. Fastener 26 extends to a corner 34.
At corner 3~, fastener 26 joins spacer 30, which extends to a `! 30 corner 36. At corner 36, spacer 30 joins elevator 32.
Corners 34 and 36 ma~e approximately 90- angles in strap 26.
Thus, fastener 28 extends vertically, spacer 30 extends horizontally, and elevator 32 extends vertically. In the preferred e~bodiments, ~astener 28 extends approximately four inches, spacer 30 extends approximately 7/8 inch inside-to-~36~3~
inside, and elevator 32 extends approximately 5/8 of an inch from its end to the bottom of spacer 30.
In the preferred embodiments, wrench receiver 22 is formed from hollow, square steel channel, approximately 3/4 inch on a side in cross section and approximately khree inches long. A top surface of wrench receiver 22 includes a threaded hole 38 into which thumb screw 24 is screwed. Hole 38 may be directly taped in wrench receiver 22 or include a threaded nut welded to wrench receiver 22. Wrench receiver 2~ is rigidly mounted, preferably by welding, upon spacer 30 of strap 26.
Accordingly, wrench receiver 22 extends horizontally. In addition, wrench receiver 22 is positioned relative to strap 26 so that one end of wrench receiver 22 is generally flush with elevator 32. Thus, a little less than two inches of wrench receiver 22 does not directly overlie any portion of strap 26.
In the preferred embodiments, wrench 20 is formed from a nut 40 and a hollow, square steel channel 42 approximately six inches long. In cross section, channel 42 is smaller on a side than the interior of wrench receiver 22. Thus, channel 42 slidably fits within the interior of wrench receiver 22.
For example, channel 42 may be 5/8 or 1/2 inch channel. Nut 40 is preferably a threaded steel nut which is welded to an end of channel 42 so that a hole 44 in nut 40 may extend vertically through nut 40. In addition, a top side of wrench 20 includes first and second notches 46a and 46b.
In attaching holding device 10 to form board 16, a desired position is first identified on form board 16 for the attachment of holding device 10. The measuring required in ~; 30 this identification is a relatively simple task because a position for holding device 10 must be determined in only the one dimension for which form board 16 principally extends. In addition, a single operation may measure positions for multiple holding devices 10 along form board 16.
~3~7 .
Consequently, positions for several holding devices 10 mzy bedetermined quickly.~ olding device lO is positioned at the indicated location and, as shown in FIGURES 1-3, oriented so that Lastener 28 lies alongside an exterior vertical surface 4~ of form board 16, and elevator 32 rests directly on a top horizontal sur~ace 50 of form board 16. Fastener 28 includes centrally located holes 52a and 52b, which serve in attaching holding device 10 to form board 16. Preferably, double-headed nails 54a and 54b are driven through holes 52a-52b, respectively, to securely fasten fastener 28 to form board 16 at the indicated position on exterior vertical surface 48. Double-headed nails ease nail removal after concrete 12 has hardened.
As is conventional, anchor bolt 1~ includes threads 56.
: 15 Nut 40 is chosen so that it is compatibly threaded ~ith threads 56. Thus, anchor bolt 14 is threaded into nut 40 a desired distance and a finger portion 58 of anchor bolt 14 pointed a desired direction. In addition, wrench 20 is inserted in wrench receiver 22. Specifically, wrench 20 is inserted in wrench receiver 22 so that anchor bolt 14 extends in a vertical orientation and is spaced inwardly, relative to form 18, and apart from an interior vertical surface 60 o~
form board 16.
Moreover, wrench 20 is inserted in wrench receiver 22 so that one of notches 46a-46b aligns with a predetermined point, e.g. interior vertical surface 60 of form 16. Notches 46a-46b are positioned on wrench 20 so that when they are so aligned, the center of nut 40 and of anchor bol~ 1~ are spaced a predetermined distance away fro~ interior vertical surface `30 60. In the preferred embodlment, these predetermined distances indicated by notches 46a and 46b are approximately 1-3/4 and 2-3/4 inches, respectively, from surface 60. Notch 46a aligns anchor bolt 14 with the center of a conventional building's 2 X 4 mud sill, and notch 46b aligns anchor bolt 14 with the center of a conventional building's 2 X 6 mud sill.
.
~39~37 g Once wrench 20 has been ins~rted so that the desired one o~
notches 46a-46b aligns with the desired point, thumb screw 24 is tightened against wrench 20 to lock wrench 20 in place within wrench receiver 22.
When all holding devices 10 required by a foundation have been positioned as described above, inspections may take place and then concrete 12 poured. After concrete 12 hardens, thumb screws 24 are loosened~ nails 54 are removed, and wrenches 20 are unscrewed from anchor bolts 1~. In addition to extricating wrench 20 from anchor bolt 14, the unscrewing of wrench 20 cleans concrete 12 from threads 56 of anchor bolt 14.
FIGURES 4-5 show a second preferred embodiment of holding device 10. As discussed above, in the first embodiment illustrated by FIGURES 1-3, wrench 20 extends for approximately six inches from nut 40. Accordingly, in order to unscrew wrench 20 from anchor bolt 14 after concrete 12 (see FIGURE 2) hardens, clear space around anchor bolt 14 with a minimum radius of six inches must exist. However, anchor bolt 14 may occasionally be located near an obstruction, such as a vertically running water or gas pipe, which would impede the removal of wrench 20 from anchor bolt 14. The second embodiment illustrated by FIGURES 4 5 addresses the problem of - nearby obstructions.
As shown in FIGURES 4-5, wrench receiver 22, thumb screw 24, and strap 26 are all configured substantially as discussed above in connection with FIGURES 1-3. However, a wrench 20l of this second embodiment differs from wrench 20 of the first embodiment. Specifically, a nut 40' attaches to an end of a hollow, square steel channel 41', which is approximately 1 inch long. Preferably, channel 41' is approximately 1/2 inch on a side in cross section. Another hollow, square steel channel 42' is approxinately six inches long. Channel 42', which is preferably around 5/8 inch on a side in cross section, slidably mates with wrench receiver 22 as discussed ~03~3~
above in connection with channel 42. Channel 42' includes a threaded hole 62 to which a thumb screw ~4 mates.
Additionally, channel 42' includes notches 46a-46b, as discussed above.
Channel 41' mates with channel 42' in a manner similar to the way channel 42' mates with wrench receiver 22.
Specifically, channel 41' slidably mates with channel 42' and is locked in place by thumb screw 64. This second embodiment is utilized substantially as discussed above in connection with the first embodiment. However, after concrete 12 (see FIGURE 2) has hardened, channel 42' may be separated from channel 41~ by loosening thumb screw 64. since channel 41' is only around one inch long, nut 40' and channel 41' may be unscrewed from anchor bolt 14 when obstructions are nearby.
While the above discussion relates to the positioning of items relative to a single form board 16, the present invention is n~t limited to such use and may be adapted for use in connection with suspending items from ~eams supported by two form boards 16 located on opposing sides of the items, as shown in FIGURE 6. FIGURE 6 shows a plate 68 having four anchor bolts 14 attached thereto for embedment in concrete (not shown) and subsequent attachment to a column (not shown).
Plate 68 is suspended from beams 70 and 72. Beam 70 extends across the entire width of form 18 from a form board 16a to a form board 16b, which opposes form board 16a. Likewise, beam 72 extends across the entire length of form 18 from a form board 16c to a form board 16d, which opposes form board 16c.
Beams 70-72 mate with wrench receivers 22 in the manner discussed above in connection with FIGU~ES 1-5 for wrench 20.
Stop pins 74 retain plate 68 centrally positioned on one of beams 70-72 while permitting sliding movement with the other of beams 70-72. Thus, plate 68 may be precisely positioned at a desired location within form 18 by adjusting beams 70-72 and locking thumb screws 24.
.
, .
9~37 In addition, beam 70 resides below beam 72. The diverse heights achieved by beams 70-72 result from ori~nting holding devices lOa and lOh, which collectively retain beam 70, differently from holding devices lOc and lOd, which collectively retain beam 72. As shown in FIGURE 6, elevators 32 of holding devices lOc-lOd are placed on top surfaces 50 of form boards 16c-16d, respectively, in the manner discussed above in connection with FIGURES 1-5. On the other hand, elevators 32 of holding devices lOa-lOb are not used in connection with form boards 16a-16b. Rather, holding devices lOa-lOb are turned around so that their wrench receivers 22 directly rest on top surfaces 50 of form boards 16a-16b, respectively. F~GURE 7 illus~rates this orientation of holding devices lOa-lOb in greater detail. Thus, beam 70 is spaced below beam 72 by the length of elevators 32. The same alternate orientation relative to form boards 16 may be used to achieve greater flexibility in vertically positioning anchor bolts 14 (see FIGURES 1-5) relative to concrete 12 (see FIGURE 2).
FIGURE 8 shows yet another use of holding device 10 in connection with a form board 16e. Form board 16e represents conventional "one-by" lumber (ie. 1 X 6, 1 X 8, 1 X 10, etc.), which is typically around 7/8 inch thick. In this orientation, elevator 32 extends vertically downward alongside interior vertical surface 60 of form board 16e, and spacer 30 rests directly on top surface 50 of form board 16e.
Accordingly, holding device 10 rigidly and securely attaches to one-by form board 16e due ~o the cooperative dimensioning between spacer 30, elevator 3~, and the thickness of form board 16e.
The above-discussed embodiments of holding device 10 operate to rigidly hold anchor bolt 14 in position relative to form board 16. This rigidness or security occurs, at least in part, from the attachment of fastener 28 to exterior vertical surface 48 of form board 16, to the resting of wrench receiver 3~3~37 22 on top surface 50 of Porm board 16, either directly or through elevator 32, and the metal construction o~ the components of holding device 10. As shown in FIGU~E 9, this rigidity in holding anchor bolt 14 permits anchor bolt 14 to support additional items, such as reinforcing steel bars (rebar~ 76. Specifically, an entire curtain wall of rebar 76 may be positively tied or wired to anchor bolt 14 and supported by anchor bolt 14 within form 18 without causing anchor bolt 1~ or rebar 76 to sag or otherwise move out of position.
However, conventional foundation construction practices occasionally specify that rebar 76 should be positioned further inward within form 18 from anchor bolt 14.
Accordingly, a cradle 78 constructed in accordance with the teachings of the present invention, as illustrated in FIGURES
10-14, may serve to conveniently tie rebar 76 and anchor bolt 14 together while simultaneously spacing rebar 76 away from anchor bolt 14. ~olding device 10 supports cradle 78 along with all rebar 76 tied thereto.
Cradle 78 represents a specifically configured, stamped piece of metal strapping. Preferably, cradle 78 is six-eight inches in length and bent so that a spacer section 80 resides at one end of cradle 78 and a finger section 82 resides at the other. A bolt hole 84 extends vertically through the thickness of spacer 80 near an end of cradle 78, and a rebar hole 86 extends vertically through the central portion of spacer 80. Hole 84 is generally circular ~hile hole 86 is elongated. In addition, cradle 78 is dimpled throughout most of its length. Accordingly, cradle 78 exhibits a concave shape, with an opening pointing up. This concave shape enhances the strength of cradle 78 and ~orms a spoon section 88 in the end of cradle 78 provided by finger 82. Spoon section 88 conforms to the circular cross-sectional shape of conventional rebar, as discussed below in connection with FIGURES 12-14.
.
~3~ 7 Bolt hole 84 in cradle 78 is dimensioned in cooperation with anchor bolt 1~. In particular hole 84 has a diameter slightly larger than the diameter of anchor bolt 14. Thus, anchor bolt 14 may be inserted through hole 8~ and cradle 78 may freely slide up and down on anchor bolt 14 when anchor bolt 14 is installed in hole 84. On the other hand, the diameter of hole 84 is not significantly larger than the diametex of anchor bolt 14. Thus, unless spacer section 80 is positioned generally perpendicular to anchor bolt 14, a wall 90, which surrounds hole 84, of cradle 78 binds against anchor bolt I4. This binding prevents movement of cradle 78 on anchor bolt 14 and occurs when spacer 80 is positioned at an angle ~ relative to anchor bolt 14.
Accordingly, cradle 78 may be installed on an anchor bolt 14 and raised or lowered so that, when it is placed at angle relative to anchor bolt 14, it resides at a desired position.
The force exerted by gravity on cradle 78 serves to maintain angle ~. Consequently, cradle 78 remains at the selected location re~lative to anchor bolt 14.
ZO As shown in FIGURES 10 and 11, this desired position allows rebar 76 to be positioned at a desired vertical location. When spacer 80 exhibits angle ~, it is angled slightly downward. The bend which forms an intersection 92 between spacer 80 and finger 82 defines an anyle B which causes finger 82 to projec~ slightly upward. In the preferred embodiments angle B is around 90-. Thus, when rebar 76 is oriented generally parallel ~o form board 16 ~see FIGURE 9), the force exerted on rebar 76 by gravity urges rebar 76 to remain at intersection 92. Moreover, the additional weight added to cradle 78 by rebar 76 serves to increase binding forGes between anchor bolt 14 and wall 90 so that cradle 78 remains clamped in place on anchor bolt 14.
FIGURES 12-14 illustrate an alternate use of cradle 78 in positioning and tying rebar 76 to anchor bolt 14. Rebar hole 86 is suf~iciently large so that rebar 76 easily ~its therein, , :
~3~3~7 including any distortions of rebar 76 caused by bending.
Thus, FIGU~ES 12~14 show various views of rebar 76 extending through rebar hole 86 toward anchor bolt 14 and form board 16 (see FIGURES 1,~, and 9). Typically, in this alternate use, rebar 76 is bent downwards, as shown in FIGURES 12-13 or sideways lnot shown) in the vicinity of anchor bolt 14~ Of course, additional rebar 76 may be tied into the rebar 76 positioned using cradle 7~.
In addition, rebar hole 86 resides at a location determined in cooperation with angle ~, angle B, the length of finger 82, and the diameter of rebar 76. Specifically, when cradle 78 exhibits angle ~ relative to anchor bolt 14, spoon 88 resides below an upper wall 94 of hole 86 by a distance substantially equivalent to the diameter of rebar 76. Upper wall 94 is the wall of hole 86 which resides nearest bolt hole 84. Those skilled in the art may properly position spoon 88 by controlling angle ~ in cooperation with the length of finger 82 in accordance with well known trigonometric principles. As a result, when rebar 76 is installed through hole 86 and rests in spoon 88, it is substantially level and perpendicular to anchor bolt 14.
The concave shape of cradle 78 in the vicinity of spoon 88 conforms to the shape of rebar 76 and causes rebar 76 to remain stably positioned so that minor bumps and other construction jostles do not dislodge rebar 76 from cradle 78.
In addition, the weight of rebar 76 extending away from anchor bolt 14 and cradle 78 firmly positions rebar 76 against upper wall 94 and firmly clamps cradle wall 90 to anchor bolt 14.
In summary, the present invention provides an improved apparatus for positioning items so that they may subsequently be embedded in concrete. The present invention includes a cantilever holding device which positions items relative to a single form board. Thus, the present invention is useful in the construction of monolithic slab foundations. The holding device is configured for quicX and easy positioning of anchor I ~ID39~3'7 bolts in a variety of different applications~ Moreover, the present invention rigidly holds items so that ~he weight of I anchor bolts and rebar and the no~mal jostling which occurs during construction do not significantly alter positioning.
Furthermore, the present invention includes a cradle which permits spacing and tying of rebar relative to an anchor bolt.
The cradle is configured for convenient use and flexibility in adapting it to rebar structures. As a result of the present invention, foundation strength improves due to the tying of anchor bolts into rebar structures, construction time decreases due to ease and convenience in using the present j invention, accurate and meaningful inspections may take place prior to the pouring of concrete, and rework time is reduced.
The present invention has been described above with reference to preferred embodiments. However, those skilled in the art will recognize that changes and modifications may be made in ~hese preferred embodiments without departing fro~ the scope of the present invention. For example, while the above discussion mentions the use of metal components, nothing prevents suitable plastic materials from being adapted for one or more o~ the components included in the present invention.
In addition, the precise dimensions mentioned above may be substantially changed in order to adapt the present invention to different applications.
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to an anchor bolt. Thus, rebar may be directly tied to and supported by the present invention.
Another advantage is that the present invention permits the tying of rebar to an anchor bolt in numerous diverse configurations.
The terms "vertical" and "horizontal" are used herein as relative terms to describe items whose orientations are generally similar to or are substantially different from one another. Those skilled in the art will recognize that only general orientations and not precise orientations relative to the direction of force exerted by gravity are implied. In other words, as used herein ~vertical" and "horizontal" refer to directions which may differ considerably from precisely vertical and precisely horizontal orientations, respectively.
While the terms 'Ivertical~ and "horizontal" apply to orientations of items during normal usage of the present invention, those skilled in the art will further recognize that all such items may, in other circumstances, be physically orien~ed so that "vertical" items extend precisely ~0 "horizontal" and vice-versa.
The above and other advantages of the present invention are carried out in one form by an apparatus which rigidly positions an anchor bolt alongside an interior vertical surface of a form board. The anchor bolt may thereafter be embedded in concrete. The apparatus includes a member which extends in a generally vertical direction when sPcured to an exterior vertical surface of the form board. In addition, the apparatus includes a member which extends in a generally horizontal dixection when the appara~us is secured to the form board. The horizontally extending member rigidly attaches to the vertically extending member at substantially a perpendicular angle. Moreover, the horizontally extending member is configured to rest upon a top horizontal surface of the form board. The apparatus also includes a device which : ' , 2~9~317 couples to the horizontally extending member to releasably hold the anchor bolt.
In the accompanying drawings: .
FIGURE 1 shows a perspective Vi2W of a holding device constructed in accordance with the teaching of the present invention and attached to a form board;
FIGURE 2 shows a cross-sectional side view of a ~irst embodiment of the holding device of the present invention;
FIGURE 3 shows an exploded, perspective view of a first embodiment of the holding device of the present invention;
FIGURE 4 shows an exploded, perspective view of a second embodiment of the holding device of the present invention;
FIGURE 5 shows a cross-sectional side view of the second embodiment of the holding device of the present invention;
FIGURE 6 shows the present invention operated to position anchor bolts for embedment in concrete and attachment to a column;
FIGURE 7 shows a cross-sectional side view of the present invention taken about line 1--7 of FIGURE 6;
: FIGURE 8 shows the holding device of the present invention installed on a one-by form board;
FIGURE 9 shows the holding device of the present invention supporting a curtain wall of rebar;
FIGURE 10 shows a perspective view of a cradle portion of the present invention supporting a rebar in a first orientation;
:: FIGURE 11 shows a side view of the cradle portion of the ~ present invention supporting a rebar in the ~rst orientation;
, ,, , Z~3~3~3~
FIGURE 12 shows a perspective view of the cradle portion of the present invention supporting a rebar in a second orientation;
FIGURE 13 shows a side view of the cradle portion of the present invention supporting a rebar in the second orientation; and FIGURE 14 shows a cross-sectional side view taken about line 1~--14 of FIGURE 12.
In accordance with the teaching of the present invention, FIGURES 1-3 show a first embodiment of a holding device 10, which is used to position items for embedment in concrete 12.
For the purposes of the present invention, concrete 12 may, but need not necessarily, represent a monolithlc slab foundation. Holding device 10 positions a conventional anchor bolt 14 relative to a conventional 'itwo-by" (ie. 2 X 6, 2 X 8, X 10, etc.) form board 16. As is conventional, form board 16 serves as one stop in a form 18 into which concrete 12 is poured while in a wet state. When concrete 12 hardens, form 18, including form board 16, is removed and concrete 12 retains the shape (not shown) defined by form 18.
With specific reference to FIGURE 3, holding device 10 includes a wrench 20, a wrench receiver 22, a thumb-screw 24, and a steel strap 26. In the preferred embodiments, strap 26 is approximately 3/16 inch thic~ steel that is approximately 3/4 inch wide. Strap 26 is bent into a fastener 28, a spacer 30, and 2n elevator 32. Fastener 26 extends to a corner 34.
At corner 3~, fastener 26 joins spacer 30, which extends to a `! 30 corner 36. At corner 36, spacer 30 joins elevator 32.
Corners 34 and 36 ma~e approximately 90- angles in strap 26.
Thus, fastener 28 extends vertically, spacer 30 extends horizontally, and elevator 32 extends vertically. In the preferred e~bodiments, ~astener 28 extends approximately four inches, spacer 30 extends approximately 7/8 inch inside-to-~36~3~
inside, and elevator 32 extends approximately 5/8 of an inch from its end to the bottom of spacer 30.
In the preferred embodiments, wrench receiver 22 is formed from hollow, square steel channel, approximately 3/4 inch on a side in cross section and approximately khree inches long. A top surface of wrench receiver 22 includes a threaded hole 38 into which thumb screw 24 is screwed. Hole 38 may be directly taped in wrench receiver 22 or include a threaded nut welded to wrench receiver 22. Wrench receiver 2~ is rigidly mounted, preferably by welding, upon spacer 30 of strap 26.
Accordingly, wrench receiver 22 extends horizontally. In addition, wrench receiver 22 is positioned relative to strap 26 so that one end of wrench receiver 22 is generally flush with elevator 32. Thus, a little less than two inches of wrench receiver 22 does not directly overlie any portion of strap 26.
In the preferred embodiments, wrench 20 is formed from a nut 40 and a hollow, square steel channel 42 approximately six inches long. In cross section, channel 42 is smaller on a side than the interior of wrench receiver 22. Thus, channel 42 slidably fits within the interior of wrench receiver 22.
For example, channel 42 may be 5/8 or 1/2 inch channel. Nut 40 is preferably a threaded steel nut which is welded to an end of channel 42 so that a hole 44 in nut 40 may extend vertically through nut 40. In addition, a top side of wrench 20 includes first and second notches 46a and 46b.
In attaching holding device 10 to form board 16, a desired position is first identified on form board 16 for the attachment of holding device 10. The measuring required in ~; 30 this identification is a relatively simple task because a position for holding device 10 must be determined in only the one dimension for which form board 16 principally extends. In addition, a single operation may measure positions for multiple holding devices 10 along form board 16.
~3~7 .
Consequently, positions for several holding devices 10 mzy bedetermined quickly.~ olding device lO is positioned at the indicated location and, as shown in FIGURES 1-3, oriented so that Lastener 28 lies alongside an exterior vertical surface 4~ of form board 16, and elevator 32 rests directly on a top horizontal sur~ace 50 of form board 16. Fastener 28 includes centrally located holes 52a and 52b, which serve in attaching holding device 10 to form board 16. Preferably, double-headed nails 54a and 54b are driven through holes 52a-52b, respectively, to securely fasten fastener 28 to form board 16 at the indicated position on exterior vertical surface 48. Double-headed nails ease nail removal after concrete 12 has hardened.
As is conventional, anchor bolt 1~ includes threads 56.
: 15 Nut 40 is chosen so that it is compatibly threaded ~ith threads 56. Thus, anchor bolt 14 is threaded into nut 40 a desired distance and a finger portion 58 of anchor bolt 14 pointed a desired direction. In addition, wrench 20 is inserted in wrench receiver 22. Specifically, wrench 20 is inserted in wrench receiver 22 so that anchor bolt 14 extends in a vertical orientation and is spaced inwardly, relative to form 18, and apart from an interior vertical surface 60 o~
form board 16.
Moreover, wrench 20 is inserted in wrench receiver 22 so that one of notches 46a-46b aligns with a predetermined point, e.g. interior vertical surface 60 of form 16. Notches 46a-46b are positioned on wrench 20 so that when they are so aligned, the center of nut 40 and of anchor bol~ 1~ are spaced a predetermined distance away fro~ interior vertical surface `30 60. In the preferred embodlment, these predetermined distances indicated by notches 46a and 46b are approximately 1-3/4 and 2-3/4 inches, respectively, from surface 60. Notch 46a aligns anchor bolt 14 with the center of a conventional building's 2 X 4 mud sill, and notch 46b aligns anchor bolt 14 with the center of a conventional building's 2 X 6 mud sill.
.
~39~37 g Once wrench 20 has been ins~rted so that the desired one o~
notches 46a-46b aligns with the desired point, thumb screw 24 is tightened against wrench 20 to lock wrench 20 in place within wrench receiver 22.
When all holding devices 10 required by a foundation have been positioned as described above, inspections may take place and then concrete 12 poured. After concrete 12 hardens, thumb screws 24 are loosened~ nails 54 are removed, and wrenches 20 are unscrewed from anchor bolts 1~. In addition to extricating wrench 20 from anchor bolt 14, the unscrewing of wrench 20 cleans concrete 12 from threads 56 of anchor bolt 14.
FIGURES 4-5 show a second preferred embodiment of holding device 10. As discussed above, in the first embodiment illustrated by FIGURES 1-3, wrench 20 extends for approximately six inches from nut 40. Accordingly, in order to unscrew wrench 20 from anchor bolt 14 after concrete 12 (see FIGURE 2) hardens, clear space around anchor bolt 14 with a minimum radius of six inches must exist. However, anchor bolt 14 may occasionally be located near an obstruction, such as a vertically running water or gas pipe, which would impede the removal of wrench 20 from anchor bolt 14. The second embodiment illustrated by FIGURES 4 5 addresses the problem of - nearby obstructions.
As shown in FIGURES 4-5, wrench receiver 22, thumb screw 24, and strap 26 are all configured substantially as discussed above in connection with FIGURES 1-3. However, a wrench 20l of this second embodiment differs from wrench 20 of the first embodiment. Specifically, a nut 40' attaches to an end of a hollow, square steel channel 41', which is approximately 1 inch long. Preferably, channel 41' is approximately 1/2 inch on a side in cross section. Another hollow, square steel channel 42' is approxinately six inches long. Channel 42', which is preferably around 5/8 inch on a side in cross section, slidably mates with wrench receiver 22 as discussed ~03~3~
above in connection with channel 42. Channel 42' includes a threaded hole 62 to which a thumb screw ~4 mates.
Additionally, channel 42' includes notches 46a-46b, as discussed above.
Channel 41' mates with channel 42' in a manner similar to the way channel 42' mates with wrench receiver 22.
Specifically, channel 41' slidably mates with channel 42' and is locked in place by thumb screw 64. This second embodiment is utilized substantially as discussed above in connection with the first embodiment. However, after concrete 12 (see FIGURE 2) has hardened, channel 42' may be separated from channel 41~ by loosening thumb screw 64. since channel 41' is only around one inch long, nut 40' and channel 41' may be unscrewed from anchor bolt 14 when obstructions are nearby.
While the above discussion relates to the positioning of items relative to a single form board 16, the present invention is n~t limited to such use and may be adapted for use in connection with suspending items from ~eams supported by two form boards 16 located on opposing sides of the items, as shown in FIGURE 6. FIGURE 6 shows a plate 68 having four anchor bolts 14 attached thereto for embedment in concrete (not shown) and subsequent attachment to a column (not shown).
Plate 68 is suspended from beams 70 and 72. Beam 70 extends across the entire width of form 18 from a form board 16a to a form board 16b, which opposes form board 16a. Likewise, beam 72 extends across the entire length of form 18 from a form board 16c to a form board 16d, which opposes form board 16c.
Beams 70-72 mate with wrench receivers 22 in the manner discussed above in connection with FIGU~ES 1-5 for wrench 20.
Stop pins 74 retain plate 68 centrally positioned on one of beams 70-72 while permitting sliding movement with the other of beams 70-72. Thus, plate 68 may be precisely positioned at a desired location within form 18 by adjusting beams 70-72 and locking thumb screws 24.
.
, .
9~37 In addition, beam 70 resides below beam 72. The diverse heights achieved by beams 70-72 result from ori~nting holding devices lOa and lOh, which collectively retain beam 70, differently from holding devices lOc and lOd, which collectively retain beam 72. As shown in FIGURE 6, elevators 32 of holding devices lOc-lOd are placed on top surfaces 50 of form boards 16c-16d, respectively, in the manner discussed above in connection with FIGURES 1-5. On the other hand, elevators 32 of holding devices lOa-lOb are not used in connection with form boards 16a-16b. Rather, holding devices lOa-lOb are turned around so that their wrench receivers 22 directly rest on top surfaces 50 of form boards 16a-16b, respectively. F~GURE 7 illus~rates this orientation of holding devices lOa-lOb in greater detail. Thus, beam 70 is spaced below beam 72 by the length of elevators 32. The same alternate orientation relative to form boards 16 may be used to achieve greater flexibility in vertically positioning anchor bolts 14 (see FIGURES 1-5) relative to concrete 12 (see FIGURE 2).
FIGURE 8 shows yet another use of holding device 10 in connection with a form board 16e. Form board 16e represents conventional "one-by" lumber (ie. 1 X 6, 1 X 8, 1 X 10, etc.), which is typically around 7/8 inch thick. In this orientation, elevator 32 extends vertically downward alongside interior vertical surface 60 of form board 16e, and spacer 30 rests directly on top surface 50 of form board 16e.
Accordingly, holding device 10 rigidly and securely attaches to one-by form board 16e due ~o the cooperative dimensioning between spacer 30, elevator 3~, and the thickness of form board 16e.
The above-discussed embodiments of holding device 10 operate to rigidly hold anchor bolt 14 in position relative to form board 16. This rigidness or security occurs, at least in part, from the attachment of fastener 28 to exterior vertical surface 48 of form board 16, to the resting of wrench receiver 3~3~37 22 on top surface 50 of Porm board 16, either directly or through elevator 32, and the metal construction o~ the components of holding device 10. As shown in FIGU~E 9, this rigidity in holding anchor bolt 14 permits anchor bolt 14 to support additional items, such as reinforcing steel bars (rebar~ 76. Specifically, an entire curtain wall of rebar 76 may be positively tied or wired to anchor bolt 14 and supported by anchor bolt 14 within form 18 without causing anchor bolt 1~ or rebar 76 to sag or otherwise move out of position.
However, conventional foundation construction practices occasionally specify that rebar 76 should be positioned further inward within form 18 from anchor bolt 14.
Accordingly, a cradle 78 constructed in accordance with the teachings of the present invention, as illustrated in FIGURES
10-14, may serve to conveniently tie rebar 76 and anchor bolt 14 together while simultaneously spacing rebar 76 away from anchor bolt 14. ~olding device 10 supports cradle 78 along with all rebar 76 tied thereto.
Cradle 78 represents a specifically configured, stamped piece of metal strapping. Preferably, cradle 78 is six-eight inches in length and bent so that a spacer section 80 resides at one end of cradle 78 and a finger section 82 resides at the other. A bolt hole 84 extends vertically through the thickness of spacer 80 near an end of cradle 78, and a rebar hole 86 extends vertically through the central portion of spacer 80. Hole 84 is generally circular ~hile hole 86 is elongated. In addition, cradle 78 is dimpled throughout most of its length. Accordingly, cradle 78 exhibits a concave shape, with an opening pointing up. This concave shape enhances the strength of cradle 78 and ~orms a spoon section 88 in the end of cradle 78 provided by finger 82. Spoon section 88 conforms to the circular cross-sectional shape of conventional rebar, as discussed below in connection with FIGURES 12-14.
.
~3~ 7 Bolt hole 84 in cradle 78 is dimensioned in cooperation with anchor bolt 1~. In particular hole 84 has a diameter slightly larger than the diameter of anchor bolt 14. Thus, anchor bolt 14 may be inserted through hole 8~ and cradle 78 may freely slide up and down on anchor bolt 14 when anchor bolt 14 is installed in hole 84. On the other hand, the diameter of hole 84 is not significantly larger than the diametex of anchor bolt 14. Thus, unless spacer section 80 is positioned generally perpendicular to anchor bolt 14, a wall 90, which surrounds hole 84, of cradle 78 binds against anchor bolt I4. This binding prevents movement of cradle 78 on anchor bolt 14 and occurs when spacer 80 is positioned at an angle ~ relative to anchor bolt 14.
Accordingly, cradle 78 may be installed on an anchor bolt 14 and raised or lowered so that, when it is placed at angle relative to anchor bolt 14, it resides at a desired position.
The force exerted by gravity on cradle 78 serves to maintain angle ~. Consequently, cradle 78 remains at the selected location re~lative to anchor bolt 14.
ZO As shown in FIGURES 10 and 11, this desired position allows rebar 76 to be positioned at a desired vertical location. When spacer 80 exhibits angle ~, it is angled slightly downward. The bend which forms an intersection 92 between spacer 80 and finger 82 defines an anyle B which causes finger 82 to projec~ slightly upward. In the preferred embodiments angle B is around 90-. Thus, when rebar 76 is oriented generally parallel ~o form board 16 ~see FIGURE 9), the force exerted on rebar 76 by gravity urges rebar 76 to remain at intersection 92. Moreover, the additional weight added to cradle 78 by rebar 76 serves to increase binding forGes between anchor bolt 14 and wall 90 so that cradle 78 remains clamped in place on anchor bolt 14.
FIGURES 12-14 illustrate an alternate use of cradle 78 in positioning and tying rebar 76 to anchor bolt 14. Rebar hole 86 is suf~iciently large so that rebar 76 easily ~its therein, , :
~3~3~7 including any distortions of rebar 76 caused by bending.
Thus, FIGU~ES 12~14 show various views of rebar 76 extending through rebar hole 86 toward anchor bolt 14 and form board 16 (see FIGURES 1,~, and 9). Typically, in this alternate use, rebar 76 is bent downwards, as shown in FIGURES 12-13 or sideways lnot shown) in the vicinity of anchor bolt 14~ Of course, additional rebar 76 may be tied into the rebar 76 positioned using cradle 7~.
In addition, rebar hole 86 resides at a location determined in cooperation with angle ~, angle B, the length of finger 82, and the diameter of rebar 76. Specifically, when cradle 78 exhibits angle ~ relative to anchor bolt 14, spoon 88 resides below an upper wall 94 of hole 86 by a distance substantially equivalent to the diameter of rebar 76. Upper wall 94 is the wall of hole 86 which resides nearest bolt hole 84. Those skilled in the art may properly position spoon 88 by controlling angle ~ in cooperation with the length of finger 82 in accordance with well known trigonometric principles. As a result, when rebar 76 is installed through hole 86 and rests in spoon 88, it is substantially level and perpendicular to anchor bolt 14.
The concave shape of cradle 78 in the vicinity of spoon 88 conforms to the shape of rebar 76 and causes rebar 76 to remain stably positioned so that minor bumps and other construction jostles do not dislodge rebar 76 from cradle 78.
In addition, the weight of rebar 76 extending away from anchor bolt 14 and cradle 78 firmly positions rebar 76 against upper wall 94 and firmly clamps cradle wall 90 to anchor bolt 14.
In summary, the present invention provides an improved apparatus for positioning items so that they may subsequently be embedded in concrete. The present invention includes a cantilever holding device which positions items relative to a single form board. Thus, the present invention is useful in the construction of monolithic slab foundations. The holding device is configured for quicX and easy positioning of anchor I ~ID39~3'7 bolts in a variety of different applications~ Moreover, the present invention rigidly holds items so that ~he weight of I anchor bolts and rebar and the no~mal jostling which occurs during construction do not significantly alter positioning.
Furthermore, the present invention includes a cradle which permits spacing and tying of rebar relative to an anchor bolt.
The cradle is configured for convenient use and flexibility in adapting it to rebar structures. As a result of the present invention, foundation strength improves due to the tying of anchor bolts into rebar structures, construction time decreases due to ease and convenience in using the present j invention, accurate and meaningful inspections may take place prior to the pouring of concrete, and rework time is reduced.
The present invention has been described above with reference to preferred embodiments. However, those skilled in the art will recognize that changes and modifications may be made in ~hese preferred embodiments without departing fro~ the scope of the present invention. For example, while the above discussion mentions the use of metal components, nothing prevents suitable plastic materials from being adapted for one or more o~ the components included in the present invention.
In addition, the precise dimensions mentioned above may be substantially changed in order to adapt the present invention to different applications.
:
Claims (38)
1. An apparatus for securely positioning an anchor bolt alongside an interior vertical surface of a form board for embedment of said anchor bolt in concrete, said apparatus comprising:
a vertically extending member having means for securing said apparatus to an exterior vertical surface of said form board;
a horizontally extending member rigidly attached to said vertically extending member at substantially a perpendicular angle and configured to rest upon a top horizontal surface of said form board; and means, coupled to said horizontally extending member, for releasably holding said anchor bolt.
a vertically extending member having means for securing said apparatus to an exterior vertical surface of said form board;
a horizontally extending member rigidly attached to said vertically extending member at substantially a perpendicular angle and configured to rest upon a top horizontal surface of said form board; and means, coupled to said horizontally extending member, for releasably holding said anchor bolt.
2. An apparatus as claimed in Claim 1 wherein said horizontally extending member includes means for adjusting the position of said holding means relative to said vertically extending member.
3. An apparatus as claimed in Claim 2 wherein said adjusting means comprises:
a first channel member;
a second channel member, said first and second channel members being cooperatively configured so that said second channel member slidably mounts within said first channel member; and means, coupled to one of said first and second channel members, for releasably locking said first and second channel members together.
a first channel member;
a second channel member, said first and second channel members being cooperatively configured so that said second channel member slidably mounts within said first channel member; and means, coupled to one of said first and second channel members, for releasably locking said first and second channel members together.
4. An apparatus as claimed in Claim 3 wherein said second channel member comprises:
an outer channel member, said outer channel member being cooperatively configured with said first channel member to slidably mount within said first channel member; and an inner channel member, said inner channel member being cooperatively configured with said outer channel member to slidably mount within said outer channel member.
an outer channel member, said outer channel member being cooperatively configured with said first channel member to slidably mount within said first channel member; and an inner channel member, said inner channel member being cooperatively configured with said outer channel member to slidably mount within said outer channel member.
5. An apparatus as claimed in Claim 2 wherein said horizontally extending member comprises distance measuring means for indicating distance between said holding means and said interior vertical surface of said form board.
6. An apparatus as claimed in Claim 5 wherein said distance measuring means comprises first and second notches which, when positioned relative to a single predetermined point, space said anchor bolt approximately 1-3/4 and 2-3/4 inches, respectively, away from said interior vertical surface of said form board.
7. An apparatus as claimed in Claim 1 wherein said anchor bolt is threaded, and said holding means comprises a nut threaded compatibly with said anchor bolt.
8. An apparatus as claimed in Claim 1 wherein:
said horizontally extending member resides above the entirety of said vertically extending member; and said apparatus additionally comprises a strengthening member integrally formed with said vertical member and extending substantially perpendicular to said vertically extending member, said strengthening member residing underneath and being rigidly attached to said horizontally extending member to strengthen attachment of said vertically extending member to said horizontally extending member.
said horizontally extending member resides above the entirety of said vertically extending member; and said apparatus additionally comprises a strengthening member integrally formed with said vertical member and extending substantially perpendicular to said vertically extending member, said strengthening member residing underneath and being rigidly attached to said horizontally extending member to strengthen attachment of said vertically extending member to said horizontally extending member.
9. An apparatus as claimed in Claim 1 wherein:
said horizontally extending member resides above said vertically extending member; and said apparatus additionally comprises a second vertical member rigidly attached to and beneath said horizontally extending member so that said horizontally extending member resides above and at an end of said second vertical member, said second vertical member being for spacing said horizontal member above said form board so that said horizontal member rests on top of said form board through said second vertical member.
said horizontally extending member resides above said vertically extending member; and said apparatus additionally comprises a second vertical member rigidly attached to and beneath said horizontally extending member so that said horizontally extending member resides above and at an end of said second vertical member, said second vertical member being for spacing said horizontal member above said form board so that said horizontal member rests on top of said form board through said second vertical member.
10. An apparatus as claimed in Claim 1 wherein:
said internal and external vertical surfaces of said form board with which said apparatus operates are spaced a predetermined distance apart;
said horizontally extending member resides above said vertically extending member; and said apparatus additionally comprises a second vertical member rigidly attached to and beneath said horizontally extending member so that said horizontally extending member resides above and at an end of said second vertical member, said second vertical member being spaced horizontally apart from said vertically extending member a distance approximately equal to said predetermined distance to enhance the attachment stability of said apparatus to said form board.
said internal and external vertical surfaces of said form board with which said apparatus operates are spaced a predetermined distance apart;
said horizontally extending member resides above said vertically extending member; and said apparatus additionally comprises a second vertical member rigidly attached to and beneath said horizontally extending member so that said horizontally extending member resides above and at an end of said second vertical member, said second vertical member being spaced horizontally apart from said vertically extending member a distance approximately equal to said predetermined distance to enhance the attachment stability of said apparatus to said form board.
11. An apparatus as claimed in Claim 1 wherein said vertically extending member and said horizontally extending member are comprised of metal to enhance the mechanical stability with which said anchor bolt is positioned.
12. An apparatus for attachment to an exterior vertical surface of a form board for securely positioning items inwardly from a interior vertical surface of said form board so that said items may be embedded in concrete, said apparatus comprising:
a horizontally extending member;
a first vertically extending member rigidly attached to said horizontally extending member at substantially a perpendicular angle, said first vertically extending member having means for securing said apparatus to said exterior vertical surface of said form board; and a second vertically extending member rigidly attached to said horizontally extending member at substantially a perpendicular angle, said second vertically extending member extending away from said horizontally extending member in generally the same direction as said first vertically extending member and being spaced apart from said first vertically extending member.
a horizontally extending member;
a first vertically extending member rigidly attached to said horizontally extending member at substantially a perpendicular angle, said first vertically extending member having means for securing said apparatus to said exterior vertical surface of said form board; and a second vertically extending member rigidly attached to said horizontally extending member at substantially a perpendicular angle, said second vertically extending member extending away from said horizontally extending member in generally the same direction as said first vertically extending member and being spaced apart from said first vertically extending member.
13. An apparatus as claimed in Claim 12 additionally comprising means, coupled to said horizontally extending member, for adjusting the position of said horizontally extending member relative to said interior vertical surface of said form board.
14. An apparatus as claimed in Claim 13 wherein said adjusting means comprises:
a first channel member;
a second channel member, said first and second channel members being cooperatively configured so that said second channel member slidably mounts within said first channel member; and means, coupled to one of said first and second channel members, for releasably locking said first and second channel members together.
a first channel member;
a second channel member, said first and second channel members being cooperatively configured so that said second channel member slidably mounts within said first channel member; and means, coupled to one of said first and second channel members, for releasably locking said first and second channel members together.
15. An apparatus as claimed in Claim 12 additionally comprising means, coupled to said horizontally extending member, for releasably holding an anchor bolt in a vertical orientation.
16. An apparatus as claimed in Claim 12 wherein:
said horizontally extending member extends vertically for a predetermined distance; and said second vertically extending member extends vertically for a distance greater than said predetermined distance.
said horizontally extending member extends vertically for a predetermined distance; and said second vertically extending member extends vertically for a distance greater than said predetermined distance.
17. An apparatus as claimed in Claim 12 wherein said second vertically extending member is horizontally spaced around 7/8 of an inch apart from said first vertically extending member.
18. A system for securely positioning items alongside a form board having opposing interior and exterior vertical surfaces and an upper horizontal surface so that said items may be embedded in concrete, said system comprising:
an anchor bolt;
a vertically extending plate having means for securing said plate to said exterior vertical surface of said form board;
a horizontally extending member rigidly attached to said vertically extending plate at substantially a perpendicular angle and configured to rest upon said upper horizontal surface of said form board; and means, coupled to said horizontally extending member, for releasably holding said anchor bolt in a vertical orientation.
an anchor bolt;
a vertically extending plate having means for securing said plate to said exterior vertical surface of said form board;
a horizontally extending member rigidly attached to said vertically extending plate at substantially a perpendicular angle and configured to rest upon said upper horizontal surface of said form board; and means, coupled to said horizontally extending member, for releasably holding said anchor bolt in a vertical orientation.
19. A system as claimed in Claim 18 wherein said horizontally extending member includes means for adjusting the position of said holding means relative to said vertically extending member.
20. A system as claimed in Claim 19 wherein said adjusting means comprises:
a first channel member;
a second channel member, said first and second channel members being cooperatively configured so that said second channel member slidably mounts within said first channel member; and means, coupled to one of said first and second channel members, for releasably locking said first and second channel members together.
a first channel member;
a second channel member, said first and second channel members being cooperatively configured so that said second channel member slidably mounts within said first channel member; and means, coupled to one of said first and second channel members, for releasably locking said first and second channel members together.
21. A system as claimed in Claim 18 wherein said anchor bolt is threaded, and said holding means comprises a nut threaded compatibly with said anchor bolt.
22 22. A system as claimed in Claim 18 wherein said vertically extending member and said horizontally extending member are comprised of metal to enhance the mechanical stability with which said items are positioned.
23. A system as claimed in Claim 18 additionally comprising:
an elongated member installed on said anchor bolt, said elongated member having first and second ends and exhibiting a predetermined thickness and having a hole extending through said thickness proximate said first end, said hole being configured relative to said thickness and said anchor bolt so that said anchor bolt slides within said hole so long as said elongated member is positioned substantially perpendicular to said anchor bolt and binds against portions of said elongated member which surround said hole when said elongated member deviates away from said perpendicular position; and a finger member integrally formed with said elongated member at said second end thereof, said finger member being positioned at an angle to said elongated member.
an elongated member installed on said anchor bolt, said elongated member having first and second ends and exhibiting a predetermined thickness and having a hole extending through said thickness proximate said first end, said hole being configured relative to said thickness and said anchor bolt so that said anchor bolt slides within said hole so long as said elongated member is positioned substantially perpendicular to said anchor bolt and binds against portions of said elongated member which surround said hole when said elongated member deviates away from said perpendicular position; and a finger member integrally formed with said elongated member at said second end thereof, said finger member being positioned at an angle to said elongated member.
24. A system as claimed in Claim 23 additionally comprising a concrete-reinforcing member supported at the intersection between said elongated member and said finger member.
25. A system as claimed in Claim 24 wherein:
said concrete-reinforcing member has a generally circular cross-sectional shape;
said finger member has first and second ends, said finger member first end being integrally formed with said elongated member; and said finger member second end exhibits a circular shape which conforms to said circular cross-sectional shape of said concrete-reinforcing member.
said concrete-reinforcing member has a generally circular cross-sectional shape;
said finger member has first and second ends, said finger member first end being integrally formed with said elongated member; and said finger member second end exhibits a circular shape which conforms to said circular cross-sectional shape of said concrete-reinforcing member.
26. A system as claimed in Claim 25 wherein said elongated member has a second hole located between said hole and said second end of said elongated member, said second hole exhibiting a diameter greater than the diameter of said cross-sectional shape of said concrete-reinforcing member to permit insertion of said concrete-reinforcing member therein.
27. A system as claimed in Claim 26 wherein said angle between said elongated and finger members, the distance between said first and second ends of said finger member, and said second hole are cooperatively configured so that when said elongated member deviates downwardly away from said perpendicular position until said elongated member binds against said anchor bolt, and when said concrete-reinforcing member is inserted through said second hole and rests on said second end of said finger member, said concrete-reinforcing member is substantially perpendicular to said anchor bolt.
28. An apparatus for positioning a concrete-reinforcing member relative to a vertically extending column prior to and during the pouring of concrete, said apparatus comprising:
an elongated member having first and second ends and exhibiting a predetermined thickness, said elongated member having a hole extending through said thickness proximate said first end, said hole being configured relative to said thickness and to said column so that said column slides within said hole so long as said member is positioned substantially perpendicular to said column, but binds against portions of said elongated member which surround said hole when said elongated member deviates away from said perpendicular position; and a finger member integrally formed with said elongated member at said second end thereof, said finger member being positioned at an angle to said elongated member.
an elongated member having first and second ends and exhibiting a predetermined thickness, said elongated member having a hole extending through said thickness proximate said first end, said hole being configured relative to said thickness and to said column so that said column slides within said hole so long as said member is positioned substantially perpendicular to said column, but binds against portions of said elongated member which surround said hole when said elongated member deviates away from said perpendicular position; and a finger member integrally formed with said elongated member at said second end thereof, said finger member being positioned at an angle to said elongated member.
29. An apparatus as claimed in Claim 28 wherein said angle between said elongated and finger members is configured so that when said elongated member deviates downwardly away from said perpendicular position until said elongated member binds against said column, said concrete-reinforcing member may stably rest at the intersection between said elongated and finger members.
30. An apparatus as claimed in Claim 28 wherein:
said concrete-reinforcing member with which said apparatus operates exhibits a predetermined cross-sectional shape;
said finger member has first and second ends, said finger member first end being integrally formed with said elongated member; and said finger member second end exhibits a shape generally conformal to said cross-sectional shape of said concrete-reinforcing member.
said concrete-reinforcing member with which said apparatus operates exhibits a predetermined cross-sectional shape;
said finger member has first and second ends, said finger member first end being integrally formed with said elongated member; and said finger member second end exhibits a shape generally conformal to said cross-sectional shape of said concrete-reinforcing member.
31. An apparatus as claimed in Claim 30 wherein said elongated member has a second hole located between said hole and said second end of said elongated member, said second hold being dimensioned in cooperation with said cross-sectional shape of said concrete reinforcing member to permit insertion of said concrete-reinforcing member therein.
32. An apparatus as claimed in Claim 31 wherein said angle between said elongated and finger members, the distance between said first and second ends of said finger member, and said second hole are cooperatively configured so that when said elongated member deviates downwardly away from said perpendicular position until said elongated member binds against said column, and when said concrete-reinforcing member is inserted through said second hole and rests on said second end of said finger member, said concrete-reinforcing member is substantially perpendicular to said column.
33. In a system for embedding items in concrete wherein a concrete-reinforcing member and a vertically extending column are provided to be embedded in said concrete, the improvement which comprises:
an elongated member having first and second ends and exhibiting a predetermined thickness, said elongated member having a hole extending through said thickness proximate said first end, said hole being configured relative to said thickness and to said column so that said column slides within said hole so long as said member is positioned substantially perpendicular to said column, but binds against portions of said elongated member which surround said hole when said elongated member deviates away from said perpendicular position; and a finger member integrally formed with said elongated member at said second end thereof, said finger member being positioned at an angle to said elongated member.
an elongated member having first and second ends and exhibiting a predetermined thickness, said elongated member having a hole extending through said thickness proximate said first end, said hole being configured relative to said thickness and to said column so that said column slides within said hole so long as said member is positioned substantially perpendicular to said column, but binds against portions of said elongated member which surround said hole when said elongated member deviates away from said perpendicular position; and a finger member integrally formed with said elongated member at said second end thereof, said finger member being positioned at an angle to said elongated member.
34. A system for embedding items in concrete as claimed in Claim 33, wherein said angle between said elongated and finger members is configured so that when said elongated member deviates downwardly away from said perpendicular position until said elongated member binds against said column, said concrete-reinforcing member may stably rest at the intersection between said elongated and finger members.
35. A system for embedding items in concrete as claimed in Claim 33 wherein:
said concrete-reinforcing member exhibits a predetermined cross-sectional shape;
said finger member has first and second ends, said finger member first end being integrally formed with said elongated member; and said finger member second end exhibits a shape generally conformal to said cross-sectional shape of said concrete-reinforcing member.
said concrete-reinforcing member exhibits a predetermined cross-sectional shape;
said finger member has first and second ends, said finger member first end being integrally formed with said elongated member; and said finger member second end exhibits a shape generally conformal to said cross-sectional shape of said concrete-reinforcing member.
36. A system for embedding items in concrete as claimed in Claim 35 wherein said elongated member has a second hole located between said hole and said second end of said elongated member, said second hole being dimensioned in cooperation with said cross-sectional shape of said concrete-reinforcing member to permit insertion of said concrete-reinforcing member therein.
37. A system for embedding items in concrete as claimed in Claim 36 wherein:
said concrete-reinforcing member is substantially straight; and said angle between said elongated and finger members, the distance between said first and second ends of said finger member, and said second hole are cooperatively configured so that when said elongated member deviates downwardly away from said perpendicular position until said elongated member binds against said column, and when said concrete-reinforcing member is inserted through said second hole and rests on said second end of said finger member, said concrete-reinforcing member is substantially perpendicular to said column.
said concrete-reinforcing member is substantially straight; and said angle between said elongated and finger members, the distance between said first and second ends of said finger member, and said second hole are cooperatively configured so that when said elongated member deviates downwardly away from said perpendicular position until said elongated member binds against said column, and when said concrete-reinforcing member is inserted through said second hole and rests on said second end of said finger member, said concrete-reinforcing member is substantially perpendicular to said column.
38. A system for embedding items in concrete as claimed in Claim 33 wherein said vertically extending column is an anchor bolt and said concrete-reinforcing member is metal having a circular cross-sectional shape.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US66825891A | 1991-03-11 | 1991-03-11 | |
| US07/668,258 | 1991-03-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2039437A1 true CA2039437A1 (en) | 1992-09-12 |
Family
ID=24681618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2039437 Abandoned CA2039437A1 (en) | 1991-03-11 | 1991-03-28 | Positioning apparatus for embedding items in concrete |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2039437A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587580A (en) * | 2012-03-22 | 2012-07-18 | 福州市第三建筑工程公司 | Slide-in beam column node spiral hoop and construction method |
| US9404277B2 (en) | 2014-11-28 | 2016-08-02 | 1834032 Alberta Inc. | Apparatus for positioning anchor bolts |
| CN106088595A (en) * | 2016-08-10 | 2016-11-09 | 中民筑友科技投资有限公司 | Erecting device and mold method |
| CN108193602A (en) * | 2018-02-07 | 2018-06-22 | 中交公局第二工程有限公司 | A kind of adjustable web hooping mounting and positioning device |
-
1991
- 1991-03-28 CA CA 2039437 patent/CA2039437A1/en not_active Abandoned
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587580A (en) * | 2012-03-22 | 2012-07-18 | 福州市第三建筑工程公司 | Slide-in beam column node spiral hoop and construction method |
| US9404277B2 (en) | 2014-11-28 | 2016-08-02 | 1834032 Alberta Inc. | Apparatus for positioning anchor bolts |
| CN106088595A (en) * | 2016-08-10 | 2016-11-09 | 中民筑友科技投资有限公司 | Erecting device and mold method |
| CN108193602A (en) * | 2018-02-07 | 2018-06-22 | 中交公局第二工程有限公司 | A kind of adjustable web hooping mounting and positioning device |
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