CA2995261A1 - Threshold assembly for overhead garage door - Google Patents
Threshold assembly for overhead garage door Download PDFInfo
- Publication number
- CA2995261A1 CA2995261A1 CA2995261A CA2995261A CA2995261A1 CA 2995261 A1 CA2995261 A1 CA 2995261A1 CA 2995261 A CA2995261 A CA 2995261A CA 2995261 A CA2995261 A CA 2995261A CA 2995261 A1 CA2995261 A1 CA 2995261A1
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- CA
- Canada
- Prior art keywords
- top plate
- plate
- nosing
- floor slab
- assembly
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 claims description 6
- 239000011810 insulating material Substances 0.000 claims description 5
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000011493 spray foam Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B1/00—Border constructions of openings in walls, floors, or ceilings; Frames to be rigidly mounted in such openings
- E06B1/70—Sills; Thresholds
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B1/00—Border constructions of openings in walls, floors, or ceilings; Frames to be rigidly mounted in such openings
- E06B1/70—Sills; Thresholds
- E06B2001/707—Thresholds with special provision for insulation
Abstract
A threshold assembly spans the bottom side of an overhead door opening in a building structure. The assembly includes a top plate, a nosing plate extending downwardly from the front edge of the top plate and a rear flange extending downwardly from the top plate at a location spaced rearwardly of the nosing plate such that: (i) an insulating cavity spans an underside of the top plate between the nosing plate and the rear flange forwardly of the front end of the concrete floor slab, (ii) the rear flange is in proximity to the front end of a concrete floor slab of the building, and (iii) the top plate protrudes rearwardly beyond the rear flange overtop of an upper surface of the front end of the floor slab.
Description
THRESHOLD ASSEMBLY FOR OVERHEAD GARAGE DOOR
FIELD OF THE INVENTION
The present invention relates to threshold assembly which can be cast into the front end of a concrete floor slab in a garage structure to span across the bottom of a door opening that receives an overhead door therein so that the overhead door abuts the threshold assembly in the closed position of the door.
BACKGROUND
A typical garage structure includes a door opening supporting an overhead door therein so as to be operable between open and closed positions relative to the door opening. The concrete floor slab of the garage structure typically extends to a forward edge forming the threshold along the bottom of the door opening. In this arrangement, heat from the heated interior space of the garage structure can be readily lost through the exposed front edge of the concrete at the exterior side of the closed door.
SUMMARY OF THE INVENTION
According to one aspect of the invention there is provided a threshold assembly for a door opening and an overhead door operable relative to the door opening in a building structure having a concrete floor slab terminating at a front end proximate to the door opening, the assembly comprising:
a top plate which is elongate in a longitudinal direction for spanning across a bottom of the door opening, the top plate having a depth extending between a front edge at a front end of the assembly and a rear edge at a rear end of the assembly;
a nosing plate extending downwardly from the front edge of the top plate along substantially a full length of the top plate in the longitudinal direction thereof;
a rear flange extending downwardly from the top plate at a location
FIELD OF THE INVENTION
The present invention relates to threshold assembly which can be cast into the front end of a concrete floor slab in a garage structure to span across the bottom of a door opening that receives an overhead door therein so that the overhead door abuts the threshold assembly in the closed position of the door.
BACKGROUND
A typical garage structure includes a door opening supporting an overhead door therein so as to be operable between open and closed positions relative to the door opening. The concrete floor slab of the garage structure typically extends to a forward edge forming the threshold along the bottom of the door opening. In this arrangement, heat from the heated interior space of the garage structure can be readily lost through the exposed front edge of the concrete at the exterior side of the closed door.
SUMMARY OF THE INVENTION
According to one aspect of the invention there is provided a threshold assembly for a door opening and an overhead door operable relative to the door opening in a building structure having a concrete floor slab terminating at a front end proximate to the door opening, the assembly comprising:
a top plate which is elongate in a longitudinal direction for spanning across a bottom of the door opening, the top plate having a depth extending between a front edge at a front end of the assembly and a rear edge at a rear end of the assembly;
a nosing plate extending downwardly from the front edge of the top plate along substantially a full length of the top plate in the longitudinal direction thereof;
a rear flange extending downwardly from the top plate at a location
2 spaced rearwardly of the nosing plate along substantially the full length of the top plate in the longitudinal direction thereof; and an insulating cavity spanning an underside of the top plate between the nosing plate and the rear flange;
the top plate protruding rearwardly beyond the rear flange so as to be arranged to lie overtop of the front end of the floor slab with the rear flange cast into the front end of the floor slab.
According to a second aspect of the present invention there is provided a floor assembly for a building structure having a door opening and an overhead door operable relative to the door opening, the floor assembly comprising:
a concrete floor slab spanning a floor of the building structure and terminating at a front end of the concrete floor slab proximate to the door opening;
a threshold assembly comprising:
a top plate spanning in a longitudinal direction across a bottom of the door opening at the front end of the concrete floor slab;
a nosing plate extending downwardly from the front edge of the top plate along substantially a full length of the top plate in the longitudinal direction thereof at a location spaced forwardly of the front end of the concrete floor slab;
a rear flange extending downwardly from the top plate at a location spaced rearwardly of the nosing plate along substantially the full length of the top plate in the longitudinal direction thereof such that the rear flange is in proximity to the front end of the concrete floor slab and the top plate protrudes rearwardly beyond the rear flange overtop of an upper surface of the front end of the floor slab; and an insulating cavity spanning an underside of the top plate between the nosing plate and the rear flange forwardly of the front end of the concrete
the top plate protruding rearwardly beyond the rear flange so as to be arranged to lie overtop of the front end of the floor slab with the rear flange cast into the front end of the floor slab.
According to a second aspect of the present invention there is provided a floor assembly for a building structure having a door opening and an overhead door operable relative to the door opening, the floor assembly comprising:
a concrete floor slab spanning a floor of the building structure and terminating at a front end of the concrete floor slab proximate to the door opening;
a threshold assembly comprising:
a top plate spanning in a longitudinal direction across a bottom of the door opening at the front end of the concrete floor slab;
a nosing plate extending downwardly from the front edge of the top plate along substantially a full length of the top plate in the longitudinal direction thereof at a location spaced forwardly of the front end of the concrete floor slab;
a rear flange extending downwardly from the top plate at a location spaced rearwardly of the nosing plate along substantially the full length of the top plate in the longitudinal direction thereof such that the rear flange is in proximity to the front end of the concrete floor slab and the top plate protrudes rearwardly beyond the rear flange overtop of an upper surface of the front end of the floor slab; and an insulating cavity spanning an underside of the top plate between the nosing plate and the rear flange forwardly of the front end of the concrete
3 floor slab.
By providing a hollow cavity beneath a rigid top plate, a thermal break is provided along the front end of the concrete floor slab to prevent heat loss directly from the concrete floor slab to the exterior side of the overhead door. By locating the rear flange spaced forwardly of the rear edge of the top plate, a rearward portion of the top plate behind the rear flange remains heated by the concrete floor slab immediately therebelow. The overhead door can thus be abutted with the rear heated portion of the top plate to prevent damage to the bottom seal of the overhead door which might otherwise freeze to the threshold member if the threshold member was fully isolated from the heat of the concrete floor slab. The top plate is also more resistant to damage than relying upon the concrete floor slab to form the threshold at the bottom of the door opening.
The rear flange may extend only partway downward a height of the nosing plate such that the insulating cavity is at least partially open towards a rear side thereof below the rear flange.
In colder climates, a heat insulating material preferably occupies the insulating cavity.
The nosing plate and the top plate may be formed an integral sheet of material having a bend formed therein so that the nosing plate and the top plate are joined seamlessly and continuously with one another.
The assembly may also include a bottom flange extending rearwardly from a bottom end of the nosing plate so as to define a lower boundary of the insulating cavity. The bottom flange may extend rearward only partway towards the rear flange such that the insulating cavity is partially open along the bottom side thereof.
The assembly may also include an intermediate flange extending
By providing a hollow cavity beneath a rigid top plate, a thermal break is provided along the front end of the concrete floor slab to prevent heat loss directly from the concrete floor slab to the exterior side of the overhead door. By locating the rear flange spaced forwardly of the rear edge of the top plate, a rearward portion of the top plate behind the rear flange remains heated by the concrete floor slab immediately therebelow. The overhead door can thus be abutted with the rear heated portion of the top plate to prevent damage to the bottom seal of the overhead door which might otherwise freeze to the threshold member if the threshold member was fully isolated from the heat of the concrete floor slab. The top plate is also more resistant to damage than relying upon the concrete floor slab to form the threshold at the bottom of the door opening.
The rear flange may extend only partway downward a height of the nosing plate such that the insulating cavity is at least partially open towards a rear side thereof below the rear flange.
In colder climates, a heat insulating material preferably occupies the insulating cavity.
The nosing plate and the top plate may be formed an integral sheet of material having a bend formed therein so that the nosing plate and the top plate are joined seamlessly and continuously with one another.
The assembly may also include a bottom flange extending rearwardly from a bottom end of the nosing plate so as to define a lower boundary of the insulating cavity. The bottom flange may extend rearward only partway towards the rear flange such that the insulating cavity is partially open along the bottom side thereof.
The assembly may also include an intermediate flange extending
4 downwardly from the top plate at an intermediate location spaced from both the nosing plate and the rear flange so as to separate the insulating cavity into a forward portion between the intermediate flange and the nosing plate and a rearward portion between the intermediate flange and the rear flange.
The assembly preferably further includes a plurality of rebar members rigidly connected to the threshold assembly at longitudinally spaced apart positions to extend generally radially outwardly from a longitudinal axis of the threshold assembly, and so as to lie below a plane defined by the top plate.
The rebar members may include: (i) first rear rebar members protruding rearwardly from respective first mounting locations to respective rear ends beyond the rear edge of the top plate at a first elevation spaced below the top plate, (ii) second rear rebar members protruding rearwardly from respective second mounting locations forward of the first mounting locations to respective rear ends beyond the rear edge of the top plate at a second elevation spaced below the first elevation, (iii) lower rebar .. members protruding downwardly beyond a bottom of the nosing plate at respective locations which are spaced rearwardly of the nosing plate, and/or (iv) forward rebar members protruding forwardly beyond the nosing plate at respective locations which are spaced below the top plate.
The assembly may further include a pair of end caps mounted at longitudinally opposing ends of the top plate, each end cap being oriented transversely to a longitudinal axis of the threshold assembly so as to enclose longitudinally opposing ends of the insulating cavity.
The rear flange may be integrally cast into the front end of the concrete floor slab such that the top plate lies substantially flush with an upper surface of the concrete floor slab.
The assembly preferably further includes a plurality of rebar members rigidly connected to the threshold assembly at longitudinally spaced apart positions to extend generally radially outwardly from a longitudinal axis of the threshold assembly, and so as to lie below a plane defined by the top plate.
The rebar members may include: (i) first rear rebar members protruding rearwardly from respective first mounting locations to respective rear ends beyond the rear edge of the top plate at a first elevation spaced below the top plate, (ii) second rear rebar members protruding rearwardly from respective second mounting locations forward of the first mounting locations to respective rear ends beyond the rear edge of the top plate at a second elevation spaced below the first elevation, (iii) lower rebar .. members protruding downwardly beyond a bottom of the nosing plate at respective locations which are spaced rearwardly of the nosing plate, and/or (iv) forward rebar members protruding forwardly beyond the nosing plate at respective locations which are spaced below the top plate.
The assembly may further include a pair of end caps mounted at longitudinally opposing ends of the top plate, each end cap being oriented transversely to a longitudinal axis of the threshold assembly so as to enclose longitudinally opposing ends of the insulating cavity.
The rear flange may be integrally cast into the front end of the concrete floor slab such that the top plate lies substantially flush with an upper surface of the concrete floor slab.
5 When used with a concrete driveway slab wherein the assembly further comprises a plurality of forward rebar members protruding forwardly beyond the nosing plate at respective locations which are spaced below the top plate, the forward rebar members being integrally cast into the concrete driveway slab such that the top plate lies substantially flush with an upper surface of the concrete floor slab.
BRIEF DESCRIPTION OF THE DRAWINGS
One embodiment of the invention will now be described in conjunction with the accompanying drawings in which:
Figure 1 is a sectional elevational view of a threshold assembly according to the present invention shown installed at the front end of a concrete floor slab of a building along the bottom of an overhead door opening in the building;
Figure 2 is a perspective view of the threshold assembly according to figure 1;
Figure 3 is an outer end elevational view of the threshold assembly according to figure 1;
Figure 4 is an inner end view of one of the modular sections of the threshold assembly according to figure 1;
Figure 5 is a sectional end view of the threshold assembly according to figure 1;
Figure 6 is a sectional end view of the threshold assembly according to figure 1 illustrating an alternative arrangement of the rebar members;
Figure 7 is a sectional end view of a second embodiment of the threshold assembly including an additional intermediate flange;
Figure 8 is a sectional end view of the threshold assembly according to the second embodiment of figure 2 illustrating a first configuration of rebar member
BRIEF DESCRIPTION OF THE DRAWINGS
One embodiment of the invention will now be described in conjunction with the accompanying drawings in which:
Figure 1 is a sectional elevational view of a threshold assembly according to the present invention shown installed at the front end of a concrete floor slab of a building along the bottom of an overhead door opening in the building;
Figure 2 is a perspective view of the threshold assembly according to figure 1;
Figure 3 is an outer end elevational view of the threshold assembly according to figure 1;
Figure 4 is an inner end view of one of the modular sections of the threshold assembly according to figure 1;
Figure 5 is a sectional end view of the threshold assembly according to figure 1;
Figure 6 is a sectional end view of the threshold assembly according to figure 1 illustrating an alternative arrangement of the rebar members;
Figure 7 is a sectional end view of a second embodiment of the threshold assembly including an additional intermediate flange;
Figure 8 is a sectional end view of the threshold assembly according to the second embodiment of figure 2 illustrating a first configuration of rebar member
6 placement;
Figure 9 is a sectional end view of the threshold assembly according to the second embodiment of figure 2 illustrating a second configuration of rebar member placement;
Figure 10 is a top plan view of the threshold assembly according to the first embodiment of figure 1 including a set of support collars for supporting the threshold assembly relative to concrete forms; and Figure 11 is a top plan view of a further embodiment of the threshold assembly illustrating an alternative arrangement of the support collars for supporting the threshold assembly relative to concrete forms.
In the drawings like characters of reference indicate corresponding parts in the different figures.
DETAILED DESCRIPTION
Referring to the accompanying figures there is illustrated an overhead door threshold assembly generally indicated by reference numeral 10. The assembly 10 is particularly suited for use with a garage building structure 12 having a door opening in one wall of the structure.
A typical garage structure includes a foundation stub wall extending about a perimeter of the building with a gap formed therein at the location of the door opening.
A concrete floor slab 14 is typically supported to span the floor of the building structure in floating relationship relative to the foundation stub wall. Walls of the building are supported on the concrete stub walls which in turn supports a roof thereof. A
front end 16 of the floor slab 18 extends across the bottom of the door opening. The front end of the floor slab 18 may include a forward end portion 19 in which the thickness of the floor slab is much thicker for being stronger at the location of the threshold member. A lower
Figure 9 is a sectional end view of the threshold assembly according to the second embodiment of figure 2 illustrating a second configuration of rebar member placement;
Figure 10 is a top plan view of the threshold assembly according to the first embodiment of figure 1 including a set of support collars for supporting the threshold assembly relative to concrete forms; and Figure 11 is a top plan view of a further embodiment of the threshold assembly illustrating an alternative arrangement of the support collars for supporting the threshold assembly relative to concrete forms.
In the drawings like characters of reference indicate corresponding parts in the different figures.
DETAILED DESCRIPTION
Referring to the accompanying figures there is illustrated an overhead door threshold assembly generally indicated by reference numeral 10. The assembly 10 is particularly suited for use with a garage building structure 12 having a door opening in one wall of the structure.
A typical garage structure includes a foundation stub wall extending about a perimeter of the building with a gap formed therein at the location of the door opening.
A concrete floor slab 14 is typically supported to span the floor of the building structure in floating relationship relative to the foundation stub wall. Walls of the building are supported on the concrete stub walls which in turn supports a roof thereof. A
front end 16 of the floor slab 18 extends across the bottom of the door opening. The front end of the floor slab 18 may include a forward end portion 19 in which the thickness of the floor slab is much thicker for being stronger at the location of the threshold member. A lower
7 form wall 17 may be mounted below the desired mounting location for the threshold assembly to form part of concrete forms which receives concrete for pouring the floor slab 14. An overhead door 18 is operatively supported relative to the door opening for movement between a closed position fully spanning the opening with the bottom edge .. of the door in abutment with a top surface of the floor slab, and an open position in which the door opening is substantially unobstructed by the overhead door by lifting the overhead door upwardly from the closed position to the open position.
The threshold assembly 10 includes an elongate threshold member 20 extending in a longitudinal direction across the full width of the door opening at the bottom thereof. The threshold member 20 may be formed of one or more individual sections 22 which are abutted in series with one another to collectively form the threshold member that spans the full length across the bottom of the door opening.
Although various embodiments are shown in the accompanying figures, the common features of the various embodiments will first be described.
The threshold member 20 includes a top plate 24 which spans a full depth of the threshold member between a front edge 26 and an opposing rear edge 28.
A nosing plate 30 extends downwardly from the front edge 26 of the top plate. The nosing plate 30 is typically formed integrally with the top plate 24 of a single sheet of metal such that the nosing plate and the top plate are formed continuously and seamlessly with one another.
A bottom flange 32 is similarly formed integrally with the bottom edge of the nosing plate from a common sheet of material. The bottom flange 32 extends rearwardly from the bottom of the nosing plate such that the top plate 24, the nosing plate 30 and the bottom flange 32 form a generally U-shaped structure partially defining of the boundary of a hollow cavity 34 within the interior of the threshold member.
The threshold assembly 10 includes an elongate threshold member 20 extending in a longitudinal direction across the full width of the door opening at the bottom thereof. The threshold member 20 may be formed of one or more individual sections 22 which are abutted in series with one another to collectively form the threshold member that spans the full length across the bottom of the door opening.
Although various embodiments are shown in the accompanying figures, the common features of the various embodiments will first be described.
The threshold member 20 includes a top plate 24 which spans a full depth of the threshold member between a front edge 26 and an opposing rear edge 28.
A nosing plate 30 extends downwardly from the front edge 26 of the top plate. The nosing plate 30 is typically formed integrally with the top plate 24 of a single sheet of metal such that the nosing plate and the top plate are formed continuously and seamlessly with one another.
A bottom flange 32 is similarly formed integrally with the bottom edge of the nosing plate from a common sheet of material. The bottom flange 32 extends rearwardly from the bottom of the nosing plate such that the top plate 24, the nosing plate 30 and the bottom flange 32 form a generally U-shaped structure partially defining of the boundary of a hollow cavity 34 within the interior of the threshold member.
8 A rear flange 36 extends downwardly from the top plate 24 at a location spaced rearwardly from the front edge so as to be closer to the rear edge than the front edge, while remaining spaced forwardly of the rear edge. The rear flange 36 defines a rear boundary of the hollow cavity 34. The rear flange is only approximately half the height of the nosing plate so as to extend only partway across the rear boundary of the hollow cavity such that a portion of the hollow cavity remains open at the rear side thereof. The rear flange is located such that the bottom flange 32 similarly extends only partway across the lower boundary of the cavity towards the rear flange so that the cavity is also open along a portion of the lower boundary. The top plate is sloped generally downwardly and forwardly from the rear edge to the front edge thereof when the rear flange and the nosing plate are vertically oriented in a normal mounting position of the threshold member across the bottom of the door opening in the building structure.
Two end caps 38 are mounted at the opposing outer ends of the threshold member 20. Each end cap comprises a plate member mounted perpendicularly to the longitudinal axis of the threshold member to span the full depth and the full height for enclosing the opposing outer ends of the hollow cavity 34. The top edge of each end cap plate lies generally perpendicularly to the nosing plate 30 while lying in a common plane with the rear edge of the top plate. In this manner, the front edge of the top plate 24 is spaced slightly below the top edge of each end cap at the front side of the threshold member.
When the threshold member is formed of two or more sections, the inner ends of each section, which are abutted with the inner end of an adjacent section, are each enclosed by a respective inner end plate 40. Each inner end plate is mounted perpendicularly to the longitudinal axis to span substantially the full height and full width of the threshold member by (i) being joined at a forward edge to the nosing plate 30, (ii)
Two end caps 38 are mounted at the opposing outer ends of the threshold member 20. Each end cap comprises a plate member mounted perpendicularly to the longitudinal axis of the threshold member to span the full depth and the full height for enclosing the opposing outer ends of the hollow cavity 34. The top edge of each end cap plate lies generally perpendicularly to the nosing plate 30 while lying in a common plane with the rear edge of the top plate. In this manner, the front edge of the top plate 24 is spaced slightly below the top edge of each end cap at the front side of the threshold member.
When the threshold member is formed of two or more sections, the inner ends of each section, which are abutted with the inner end of an adjacent section, are each enclosed by a respective inner end plate 40. Each inner end plate is mounted perpendicularly to the longitudinal axis to span substantially the full height and full width of the threshold member by (i) being joined at a forward edge to the nosing plate 30, (ii)
9 being joined at a bottom edge to the bottom flange 32, and (iii) being joined at the top edge to the top plate 24 similarly to the end caps 38. The inner end plates 40 differ however in that the top edge of each inner end plate lies in a common plane with the top plate so as to be substantially flush with the top plate. A plurality of bolt holes 42 are provided in each inner end plate for alignment with the corresponding bolt holes of an adjacent inner end plate of an adjacent section of the threshold member abutted therewith such that threaded fasteners can be used to bolt inner ends of adjacent sections in an end to end relationship.
In each instance, the threshold member is typically mounted along the front end of the concrete floor slab such that the rear flange 36 can be integrally cast into the front end of the floor slab. In this manner the top plate which protrudes rearwardly beyond the rear flange is suitably oriented for overlapping an upper surface of the floor slab at the front end thereof with the top plate lying substantially flush with the remainder of the floor slab positioned rearwardly of the threshold member.
Typically, the threshold member is mounted in place and supported relative to the ground to span across the door opening prior to pouring of the concrete floor slab. The threshold member thus forms a boundary portion of the concrete forms for the floor slab across the respective door opening. Concrete is poured into the concrete forms so that the uncured concrete is poured up against and around the bottom edge of the rear flange as well as lining the underside of the portion of the top plate protruding rearward beyond the rear flange.
Typically, the threshold member is aligned such that the overhead door 18 is in alignment directly above a rear portion of the top plate 24 that lies rearward of the rear flange 36. More particularly, the front or exterior face of the door is preferable aligned in a common vertical plane with the rear flange 36 of the threshold member 20.
In each instance, the threshold member is typically mounted along the front end of the concrete floor slab such that the rear flange 36 can be integrally cast into the front end of the floor slab. In this manner the top plate which protrudes rearwardly beyond the rear flange is suitably oriented for overlapping an upper surface of the floor slab at the front end thereof with the top plate lying substantially flush with the remainder of the floor slab positioned rearwardly of the threshold member.
Typically, the threshold member is mounted in place and supported relative to the ground to span across the door opening prior to pouring of the concrete floor slab. The threshold member thus forms a boundary portion of the concrete forms for the floor slab across the respective door opening. Concrete is poured into the concrete forms so that the uncured concrete is poured up against and around the bottom edge of the rear flange as well as lining the underside of the portion of the top plate protruding rearward beyond the rear flange.
Typically, the threshold member is aligned such that the overhead door 18 is in alignment directly above a rear portion of the top plate 24 that lies rearward of the rear flange 36. More particularly, the front or exterior face of the door is preferable aligned in a common vertical plane with the rear flange 36 of the threshold member 20.
10 In this manner, heating of the interior space or heating of the concrete floor slab results in heat conducted by the concrete into the rear portion of the top plate against which the door is abutted in the closed position across the door opening.
In some installations, for example particularly in colder climates a heat insulating material 46, for example spray foam insulation, can be injected into the hollow cavity to fully occupy the hollow cavity once the heat insulating material has cured into a rigid state.
As shown in the embodiment of figures 1 through 6, the hollow cavity may be fully open and uninterrupted across the full depth thereof between the nosing plate 30 and the rear flange 36.
According to the alternative embodiment of figures 7 through 9, an additional intermediate flange 48 may be provided which lies generally parallel to the nosing plate to extend downwardly from the top plate at an intermediate location evenly spaced from each of the rear flange and the nosing plate. In this manner the intermediate flange divides the hollow cavity into a separated forward portion 50 and rearward portion 52. The intermediate flange may span substantially the full height of the cavity between the top plate and the bottom flange, however in this instance the bottom flange 32 terminates at a rear edge which is spaced forwardly of the intermediate plate such that the both forward and rearward portions of the cavity remain at least partially open along the bottom side thereof.
In each instance, the threshold assembly typically also comprises a plurality of rebar members mounted in fixed relation to the threshold member 20 so as to be rigid in shape and oriented to extend generally radially outward from the longitudinal axis of the threshold member at spaced apart positions along the length of the threshold member. In all instances the rebar members remain below a plane defined
In some installations, for example particularly in colder climates a heat insulating material 46, for example spray foam insulation, can be injected into the hollow cavity to fully occupy the hollow cavity once the heat insulating material has cured into a rigid state.
As shown in the embodiment of figures 1 through 6, the hollow cavity may be fully open and uninterrupted across the full depth thereof between the nosing plate 30 and the rear flange 36.
According to the alternative embodiment of figures 7 through 9, an additional intermediate flange 48 may be provided which lies generally parallel to the nosing plate to extend downwardly from the top plate at an intermediate location evenly spaced from each of the rear flange and the nosing plate. In this manner the intermediate flange divides the hollow cavity into a separated forward portion 50 and rearward portion 52. The intermediate flange may span substantially the full height of the cavity between the top plate and the bottom flange, however in this instance the bottom flange 32 terminates at a rear edge which is spaced forwardly of the intermediate plate such that the both forward and rearward portions of the cavity remain at least partially open along the bottom side thereof.
In each instance, the threshold assembly typically also comprises a plurality of rebar members mounted in fixed relation to the threshold member 20 so as to be rigid in shape and oriented to extend generally radially outward from the longitudinal axis of the threshold member at spaced apart positions along the length of the threshold member. In all instances the rebar members remain below a plane defined
11 by the top plate.
As shown in numerous embodiments, the rebar members may include first rear members 56 mounted at respective first mounting locations to extend generally rearwardly beyond the rear edge of the top plate within a common first elevation spaced below the top plate. Each first rear member 56 is mounted at the forward end by a rigid welded connection to the intersection of the rear flange and the top plate to extend at a downward and rearward slope followed by a linear portion extending generally horizontally rearwardly at the respective first elevation.
In numerous embodiments, the rebar members may also include second rear members 58 mounted at respective second mounting locations to extend generally rearwardly beyond the rear edge of the top plate within a common second elevation spaced below the first elevation. Each second rear member is mounted at the forward end thereof by rigid welded connection to the intersection of the nosing plate and the top plate to extend at a downward and rearward slope followed by a linear portion extending generally rearward at the respective second elevation. When an intermediate flange 48 is provided, the linear portion of each second rear member 58 extend generally rearward from the bottom edge of the intermediate flange.
In numerous embodiments, the rebar members may also include lower members 60 which are mounted at respective forward mounting locations to extend generally downwardly beyond the bottom flange 32 for extending into the thickened front end portion 19 of the floor slab 14 below the bottom side of the remainder of the floor slab. Each lower member 60 is mounted at the forward end thereof by a rigid welded connection to the intersection of the nosing plate and the top plate to extend at a downward and rearward slope followed by a linear portion extending generally downwardly at an intermediate location spaced inwardly from both the front and rear
As shown in numerous embodiments, the rebar members may include first rear members 56 mounted at respective first mounting locations to extend generally rearwardly beyond the rear edge of the top plate within a common first elevation spaced below the top plate. Each first rear member 56 is mounted at the forward end by a rigid welded connection to the intersection of the rear flange and the top plate to extend at a downward and rearward slope followed by a linear portion extending generally horizontally rearwardly at the respective first elevation.
In numerous embodiments, the rebar members may also include second rear members 58 mounted at respective second mounting locations to extend generally rearwardly beyond the rear edge of the top plate within a common second elevation spaced below the first elevation. Each second rear member is mounted at the forward end thereof by rigid welded connection to the intersection of the nosing plate and the top plate to extend at a downward and rearward slope followed by a linear portion extending generally rearward at the respective second elevation. When an intermediate flange 48 is provided, the linear portion of each second rear member 58 extend generally rearward from the bottom edge of the intermediate flange.
In numerous embodiments, the rebar members may also include lower members 60 which are mounted at respective forward mounting locations to extend generally downwardly beyond the bottom flange 32 for extending into the thickened front end portion 19 of the floor slab 14 below the bottom side of the remainder of the floor slab. Each lower member 60 is mounted at the forward end thereof by a rigid welded connection to the intersection of the nosing plate and the top plate to extend at a downward and rearward slope followed by a linear portion extending generally downwardly at an intermediate location spaced inwardly from both the front and rear
12 edges of the top plate.
The rebar members may also include forward members 62 which are mounted by rigid welded connection to the nosing plate at a location spaced below the top plate to protrude forwardly from the threshold member. When using the threshold assembly in combination with a driveway slab 64, the forward members 62 are integrally cast into the driveway slab.
Turning now more particularly to figure 10, a set of support collars 66 according to the first embodiment of figure 1 are illustrated for supporting the threshold member in a level orientation at a desired position relative to concrete forms prior to the pouring of the concrete floor slab of the building structure. The set of collars 16 includes two collars spaced apart along the rear of the threshold member and two collars spaced apart along the front of the threshold member. Each collar is oriented about a respective upright axis and is secured by welded connection to one of the reinforcing rebar members protruding forwardly or rearwardly from the threshold member. Each support collar 66 is suitably sized for receiving an additional rebar member 68 vertically slidably therethrough. In this manner the additional rebar members 68 can each be penetrated into the ground as a supporting stake in the ground while being slidably received through a respective one of the support collars 66. Each support collar includes a set screw 68 threaded radially into the body of the collar for operatively engaging the additional rebar member slidably received through the collar to selectively fix the collar at a desired height relative to the rebar member that functions as a ground stake. In this manner the threshold member can be supported at longitudinally spaced apart positions along both front and rear sides of the threshold member in a stable and level orientation relative to the ground prior to formation of the concrete floor slab or the concrete driveway slab.
The rebar members may also include forward members 62 which are mounted by rigid welded connection to the nosing plate at a location spaced below the top plate to protrude forwardly from the threshold member. When using the threshold assembly in combination with a driveway slab 64, the forward members 62 are integrally cast into the driveway slab.
Turning now more particularly to figure 10, a set of support collars 66 according to the first embodiment of figure 1 are illustrated for supporting the threshold member in a level orientation at a desired position relative to concrete forms prior to the pouring of the concrete floor slab of the building structure. The set of collars 16 includes two collars spaced apart along the rear of the threshold member and two collars spaced apart along the front of the threshold member. Each collar is oriented about a respective upright axis and is secured by welded connection to one of the reinforcing rebar members protruding forwardly or rearwardly from the threshold member. Each support collar 66 is suitably sized for receiving an additional rebar member 68 vertically slidably therethrough. In this manner the additional rebar members 68 can each be penetrated into the ground as a supporting stake in the ground while being slidably received through a respective one of the support collars 66. Each support collar includes a set screw 68 threaded radially into the body of the collar for operatively engaging the additional rebar member slidably received through the collar to selectively fix the collar at a desired height relative to the rebar member that functions as a ground stake. In this manner the threshold member can be supported at longitudinally spaced apart positions along both front and rear sides of the threshold member in a stable and level orientation relative to the ground prior to formation of the concrete floor slab or the concrete driveway slab.
13 Alternatively, as shown in figure 11, when no front rebar members are provided, the support collars 66 at the front side of the threshold member may instead be welded directly to the nosing plate.
Within each set of rebar members, for example the front set, the lower set, the first rear set or the second rear set, the rebar members may be spaced apart in the longitudinal direction at a regular spacing varying between 12 inches and 24 inches on centre.
The overall depth of the threshold member as measured between the front and rear edges of the top plate is typically in the range of 6 inches to 13 inches but may vary considerably while remaining effective.
The threshold member is typically formed of stainless steel, for example 10 gauge or 3/16 of an inch plate material, or alternatively mild steel for example 3/16 of an inch plate material. In the instance of mild steel, the steel would typically be painted or coated by suitable means to resist corrosion.
Since various modifications can be made in my invention as herein above described, and many apparently widely different embodiments of same made, it is intended that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting sense.
Within each set of rebar members, for example the front set, the lower set, the first rear set or the second rear set, the rebar members may be spaced apart in the longitudinal direction at a regular spacing varying between 12 inches and 24 inches on centre.
The overall depth of the threshold member as measured between the front and rear edges of the top plate is typically in the range of 6 inches to 13 inches but may vary considerably while remaining effective.
The threshold member is typically formed of stainless steel, for example 10 gauge or 3/16 of an inch plate material, or alternatively mild steel for example 3/16 of an inch plate material. In the instance of mild steel, the steel would typically be painted or coated by suitable means to resist corrosion.
Since various modifications can be made in my invention as herein above described, and many apparently widely different embodiments of same made, it is intended that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting sense.
Claims (20)
1. A threshold assembly for a door opening and an overhead door operable relative to the door opening in a building structure having a concrete floor slab terminating at a front end proximate to the door opening, the assembly comprising:
a top plate which is elongate in a longitudinal direction for spanning across a bottom of the door opening, the top plate having a depth extending between a front edge at a front end of the assembly and a rear edge at a rear end of the assembly;
a nosing plate extending downwardly from the front edge of the top plate along substantially a full length of the top plate in the longitudinal direction thereof;
a rear flange extending downwardly from the top plate at a location spaced rearwardly of the nosing plate along substantially the full length of the top plate in the longitudinal direction thereof; and an insulating cavity spanning an underside of the top plate between the nosing plate and the rear flange;
the top plate protruding rearwardly beyond the rear flange so as to be arranged to lie overtop of the front end of the floor slab with the rear flange cast into the front end of the floor slab.
a top plate which is elongate in a longitudinal direction for spanning across a bottom of the door opening, the top plate having a depth extending between a front edge at a front end of the assembly and a rear edge at a rear end of the assembly;
a nosing plate extending downwardly from the front edge of the top plate along substantially a full length of the top plate in the longitudinal direction thereof;
a rear flange extending downwardly from the top plate at a location spaced rearwardly of the nosing plate along substantially the full length of the top plate in the longitudinal direction thereof; and an insulating cavity spanning an underside of the top plate between the nosing plate and the rear flange;
the top plate protruding rearwardly beyond the rear flange so as to be arranged to lie overtop of the front end of the floor slab with the rear flange cast into the front end of the floor slab.
2. The assembly according to claim 1 wherein the rear flange extends only partway downward a height of the nosing plate such that the insulating cavity is at least partially open towards a rear side thereof below the rear flange.
3. The assembly according to either one of claims 1 or 2 further comprising a heat insulating material occupying the insulating cavity.
4. The assembly according to any one of claims 1 through 3 wherein the nosing plate and the top plate are formed an integral sheet of material having a bend formed therein so that the nosing plate and the top plate are joined seamlessly and continuously with one another.
5. The assembly according to any one of claims 1 through 4 further comprising a bottom flange extending rearwardly from a bottom end of the nosing plate so as to define a lower boundary of the insulating cavity.
6. The assembly according to claim 5 wherein the bottom flange extends rearward only partway towards the rear flange such that the insulating cavity is partially open along the bottom side thereof.
7. The assembly according to any one of claims 1 through 6 further comprising an intermediate flange extending downwardly from the top plate at an intermediate location spaced from both the nosing plate and the rear flange so as to separate the insulating cavity into a forward portion between the intermediate flange and the nosing plate and a rearward portion between the intermediate flange and the rear flange.
8. The assembly according to any one of claims 1 through 7 further comprising a plurality of rebar members rigidly connected to the threshold assembly at longitudinally spaced apart positions to extend generally radially outwardly from a longitudinal axis of the threshold assembly, and so as to lie below a plane defined by the top plate.
9. The assembly according to claim 8 wherein the rebar members include rear rebar members protruding rearwardly beyond the rear edge of the top plate at respective locations which are spaced below the top plate.
10. The assembly according to either one of claims 8 or 9 wherein the rebar members include lower rebar members protruding downwardly beyond a bottom of the nosing plate at respective locations which are spaced rearwardly of the nosing plate.
11. The assembly according to claim 8 wherein the rebar members include first rear rebar members protruding rearwardly from respective first mounting locations to respective rear ends beyond the rear edge of the top plate at a first elevation spaced below the top plate and second rear rebar members protruding rearwardly from respective second mounting locations forward of the first mounting locations to respective rear ends beyond the rear edge of the top plate at a second elevation spaced below the first elevation.
12. The assembly according to any one of claims 8 through 11 wherein the rebar members including forward rebar members protruding forwardly beyond the nosing plate at respective locations which are spaced below the top plate.
13. The assembly according to any one of claims 1 through 12 further comprising a pair of end caps mounted at longitudinally opposing ends of the top plate, each end cap being oriented transversely to a longitudinal axis of the threshold assembly so as to enclose longitudinally opposing ends of the insulating cavity.
14. The assembly according to any one of claims 1 through 13 in combination with the concrete floor slab in which the rear flange is integrally cast into the front end of the concrete floor slab such that the top plate lies substantially flush with an upper surface of the concrete floor slab.
15. The assembly according to any one of claims 1 through 14 in combination with a concrete driveway slab wherein the assembly further comprises a plurality of forward rebar members protruding forwardly beyond the nosing plate at respective locations which are spaced below the top plate, the forward rebar members being integrally cast into the concrete driveway slab such that the top plate lies substantially flush with an upper surface of the concrete floor slab.
16. A floor assembly for a building structure having a door opening and an overhead door operable relative to the door opening, the floor assembly comprising:
a concrete floor slab spanning a floor of the building structure and terminating at a front end of the concrete floor slab proximate to the door opening;
a threshold assembly comprising:
a top plate spanning in a longitudinal direction across a bottom of the door opening at the front end of the concrete floor slab;
a nosing plate extending downwardly from the front edge of the top plate along substantially a full length of the top plate in the longitudinal direction thereof at a location spaced forwardly of the front end of the concrete floor slab;
a rear flange extending downwardly from the top plate at a location spaced rearwardly of the nosing plate along substantially the full length of the top plate in the longitudinal direction thereof such that the rear flange is in proximity to the front end of the concrete floor slab and the top plate protrudes rearwardly beyond the rear flange overtop of an upper surface of the front end of the floor slab; and an insulating cavity spanning an underside of the top plate between the nosing plate and the rear flange forwardly of the front end of the concrete floor slab.
a concrete floor slab spanning a floor of the building structure and terminating at a front end of the concrete floor slab proximate to the door opening;
a threshold assembly comprising:
a top plate spanning in a longitudinal direction across a bottom of the door opening at the front end of the concrete floor slab;
a nosing plate extending downwardly from the front edge of the top plate along substantially a full length of the top plate in the longitudinal direction thereof at a location spaced forwardly of the front end of the concrete floor slab;
a rear flange extending downwardly from the top plate at a location spaced rearwardly of the nosing plate along substantially the full length of the top plate in the longitudinal direction thereof such that the rear flange is in proximity to the front end of the concrete floor slab and the top plate protrudes rearwardly beyond the rear flange overtop of an upper surface of the front end of the floor slab; and an insulating cavity spanning an underside of the top plate between the nosing plate and the rear flange forwardly of the front end of the concrete floor slab.
17. The floor assembly according to claim 16 further comprising a heat insulating material occupying the insulating cavity.
18. The floor assembly according to either one of claims 16 or 17 wherein the nosing plate and the top plate are formed an integral sheet of material having a bend formed therein so that the nosing plate and the top plate are joined seamlessly and continuously with one another.
19. The floor assembly according to any one of claims 16 through 18 wherein the threshold assembly further comprises a plurality of rear rebar members rigidly connected to the threshold assembly to protrude rearwardly beyond the rear edge of the top plate at respective locations which are spaced below the top plate, the rear rebar members being integrally cast into the concrete floor slab.
20. The floor assembly according to any one of claims 16 through 19 14 in combination with a concrete driveway slab wherein the threshold assembly further comprises a plurality of forward rebar members protruding forwardly beyond the nosing plate at respective locations which are spaced below the top plate, the forward rebar members being integrally cast into the concrete driveway slab such that the top plate lies substantially flush with an upper surface of the concrete floor slab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2995261A CA2995261A1 (en) | 2018-02-15 | 2018-02-15 | Threshold assembly for overhead garage door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2995261A CA2995261A1 (en) | 2018-02-15 | 2018-02-15 | Threshold assembly for overhead garage door |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2995261A1 true CA2995261A1 (en) | 2019-08-15 |
Family
ID=67618388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2995261A Pending CA2995261A1 (en) | 2018-02-15 | 2018-02-15 | Threshold assembly for overhead garage door |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2995261A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11639626B1 (en) * | 2022-03-29 | 2023-05-02 | Griffin Dussault | Threshold system with an insulated thermal break device and related methods |
-
2018
- 2018-02-15 CA CA2995261A patent/CA2995261A1/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11639626B1 (en) * | 2022-03-29 | 2023-05-02 | Griffin Dussault | Threshold system with an insulated thermal break device and related methods |
| US11952830B2 (en) | 2022-03-29 | 2024-04-09 | Griffin Dussault | Threshold system with an insulated thermal break device and related methods |
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