U.S. patent application number 12/192635 was filed with the patent office on 2010-02-18 for insulated rim board and building structure employing same.
This patent application is currently assigned to THERMAPAN STRUCTURAL INSULATING PANELS INC.. Invention is credited to Edward S. Jonus, Derrick J. Kelly, Shawn M. Kelly, Emil M. Taraba, Jeffrey M. Taraba.
Application Number | 20100037547 12/192635 |
Document ID | / |
Family ID | 41680297 |
Filed Date | 2010-02-18 |
United States Patent
Application |
20100037547 |
Kind Code |
A1 |
Taraba; Jeffrey M. ; et
al. |
February 18, 2010 |
INSULATED RIM BOARD AND BUILDING STRUCTURE EMPLOYING SAME
Abstract
A three-piece insulated rim board for use in a building
structure comprises first and second elongate structural layers and
an intermediate elongate insulating layer sandwiched between and
bonded to the first and second structural layers.
Inventors: |
Taraba; Jeffrey M.; (Niagara
Falls, CA) ; Taraba; Emil M.; (Fort Erie, CA)
; Kelly; Shawn M.; (Campbellcroft, CA) ; Kelly;
Derrick J.; (Port Hope, CA) ; Jonus; Edward S.;
(Etobicoke, CA) |
Correspondence
Address: |
YOUNG BASILE
3001 WEST BIG BEAVER ROAD, SUITE 624
TROY
MI
48084
US
|
Assignee: |
THERMAPAN STRUCTURAL INSULATING
PANELS INC.
Fort Erie
CA
|
Family ID: |
41680297 |
Appl. No.: |
12/192635 |
Filed: |
August 15, 2008 |
Current U.S.
Class: |
52/289 ;
52/309.9; 52/847 |
Current CPC
Class: |
E04B 1/2608 20130101;
E04B 5/12 20130101 |
Class at
Publication: |
52/289 ; 52/847;
52/309.9 |
International
Class: |
E04C 3/29 20060101
E04C003/29; E04B 5/12 20060101 E04B005/12 |
Claims
1. A three-piece insulated rim board comprising: first and second
elongate structural layers; and an intermediate elongate insulating
layer sandwiched between and bonded to said first and second
structural layers.
2. An insulated rim board according to claim 1 wherein said
intermediate layer is formed of foam material.
3. An insulated rim board according to claim 2 wherein said foam
material is one of expanded polystyrene foam, urethane foam,
polyurethane foam and isocyanurate foam.
4. An insulated rim board according to claim 2 wherein said
intermediate layer has a thickness in the range of from about
21/2'' to about 73/8''.
5. An insulated rim board according to claim 3 wherein said
intermediate layer has a thickness in the range of from about
21/2'' to about 73/8''.
6. An insulated rim board according to claim 1 wherein the rim
board is symmetrical about vertical and horizontal planes
coincident with the central longitudinal axis of the rim board.
7. An insulated rim board according to claim 2 wherein the rim
board is symmetrical about vertical and horizontal planes
coincident with the central longitudinal axis of the rim board.
8. An insulated rim board according to claim 7 wherein said foam
material is one of expanded polystyrene foam, urethane foam,
polyurethane foam and isocyanurate foam.
9. An insulated rim board according to claim 7 wherein said
intermediate layer has a thickness in the range of from about
21/2'' to about 73/8''.
10. An insulated rim board according to claim 1 wherein said first
and second structural layers are formed of material selected from
plywood, oriented strandboard (OSB), metal sheet or other suitable
material.
11. An insulated rim board according to claim 10 wherein each of
said first and second structural layers has a thickness in the
range of from about 1/8'' to about 11/8''.
12. An insulated rim board according to claim 2 wherein said first
and second structural layers are formed of material selected from
plywood, oriented strandboard (OSB), metal sheet or other suitable
material.
13. An insulated rim board according to claim 12 wherein each of
said first and second structural layers has a thickness in the
range of from about 1/8'' to about 11/8''.
14. An insulated rim board according to claim 7 wherein said first
and second structural layers are formed of material selected from
plywood, oriented strandboard (OSB), metal sheet or other suitable
material.
15. An insulated rim board according to claim 14 wherein each of
said first and second structural layers has a thickness in the
range of from about 1/8'' to about 11/8''.
16. A floor structure for a building structure comprising:
insulated rim boards running around the perimeter of said building
structure and sitting on sill plates; and joists framed by said rim
boards, wherein said insulated rim boards are alterable in vertical
dimension without changing the symmetry of the rim boards above the
sill plates when looking at the rim boards in side elevation.
17. A floor structure according to claim 16 wherein each rim board
is of a three-piece construction comprising first and second
elongate structural layers and an intermediate elongate insulating
layer sandwiched between and bonded to said first and second
structural layers.
18. A floor structure according to claim 17 wherein the
intermediate layer of each rim board is formed of foam
material.
19. A floor structure according to claim 18 wherein said foam
material is one of expanded polystyrene foam, urethane foam,
polyurethane foam and isocyanurate foam.
20. A floor structure according to claim 19 wherein the
intermediate layer of each rim board has a thickness in the range
of from about 21/2'' to about 73/8''.
21. A floor structure according to claim 17 wherein each rim board
is symmetrical about vertical and horizontal planes coincident with
the central longitudinal axis of the rim board.
22. A floor structure according to claim 17 wherein the first and
second structural layers of each rim board are formed of material
selected from plywood, oriented strandboard (OSB), metal sheet or
other suitable material.
23. A floor structure according to claim 22 wherein the first and
second structural layers of each rim board have thicknesses in the
range of from about 1/8'' to about 11/8''.
Description
FIELD OF THE INVENTION
[0001] The present invention relates generally to building
structures and in particular, to an insulated rim board and
building structure employing the same.
BACKGROUND OF THE INVENTION
[0002] In flooring systems, rim boards run around the perimeter of
the building structure and serve as framing members to enclose the
floor joists. Typically the rim boards sit on sill plates that rest
on the building structure foundation. Floor sheathing that spans
the floor joists overlies the rim boards to provide a generally
planar support surface for the load bearing exterior walls of the
building structure.
[0003] Elongate lengths of oriented strandboard (OSB) are commonly
used as rim boards. Although OSB rim board has been widely
accepted, the thermal rating of OSB rim board is less than desired.
To address this problem, insulated rim boards have been considered
such as those supplied by Emercor Ltd. of Calgary, Alberta. The
Emercor insulated rim board comprises a polyurethane foam core
sandwiched between a pair of OSB skins. Lengths of 2'' by 2''
lumber run along the top and bottom surfaces of the foam core
between the OSB skins. Although this rim board has better thermal
characteristics than conventional OSB rim board, problems exist in
that the design of the insulated rim board does not permit the
width (i.e. vertical dimension) of the rim board to be altered at
the building site due to the fact that altering the width of the
insulated rim board changes its load bearing characteristics. As a
result, to employ effectively the Emercor insulated rim board at a
construction site, a stockpile of different size rim boards must be
maintained.
[0004] As will be appreciated, rim boards that have good thermal
characteristics and permit on-site width adjustment are desired. It
is therefore an object of the present invention at least to provide
a novel insulated rim board and building structure employing the
same.
SUMMARY OF THE INVENTION
[0005] Accordingly, in one aspect there is provided a three-piece
insulated rim board comprising:
[0006] first and second elongate structural layers; and
[0007] an intermediate elongate insulating layer sandwiched between
and bonded to said first and second structural layers.
[0008] In one form, the intermediate layer is formed of foam
material such as for example expanded polystyrene foam, urethane
foam, polyurethane foam and isocyanurate foam. The intermediate
layer has thickness in the range of from about 21/2'' to about
73/8''. The rim board is symmetrical about vertical and horizontal
planes coincident with the central longitudinal axis of the rim
board. Each of the first and second structural layers has a
thickness in the range from about 1/8'' to about 11/8''. The first
and second structural layers are formed of material selected from
plywood, oriented strandboard (OSB), metal sheet or other suitable
material.
[0009] According to another aspect there is provided a floor
structure for a building structure comprising:
[0010] insulated rim boards running around the perimeter of said
building structure and sitting on sill plates; and
[0011] joists framed by said rim boards, wherein said insulated rim
boards are alterable in vertical dimension without changing the
symmetry of the rim boards above the sill plates when looking at
the rim boards in side elevation.
BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Embodiments will now be described more fully with reference
to the accompanying drawings in which:
[0013] FIG. 1 is a perspective view, partly cut-away, of a floor
structure employing an insulated rim board;
[0014] FIG. 2 is a side cross-sectional view of the floor structure
of FIG. 1;
[0015] FIGS. 3a and 3b show tie and angle plates used in the floor
structure of FIG. 1; and
[0016] FIG. 4 is a side cross-sectional view of an alternative
floor structure employing an insulated rim board.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0017] Turning now to FIGS. 1 to 3b, a portion of a floor structure
within a building structure is shown and is generally identified by
reference numeral 20. The floor structure 20 comprises insulated
rim boards 22 that run around the perimeter of the building
structure. The rim boards 22 sit on sill plates 24 that rest on the
building structure foundation 26. Tie plates 28 that span the
exterior interface between the sill plates 24 and the rim boards 22
are secured to the sill plates 24 and rim boards 22 using suitable
fasteners 30, such as for example nails or screws, at spaced
locations about the perimeter of the building structure. The rim
boards 22 serve as framing members to enclose I-joists 32. Floor
sheathing 34 spans the I-joists 32 and overlies the rim boards 22
to provide a generally planar support surface for the external
walls 36 of the building structure. Fasteners 38, such as for
example nails or screws, secure the external walls 36 to the
I-joists 32 and floor sheathing 34. The floor sheathing 34 is
toe-nailed to the rim boards 22 and the I-joists 32 by suitable
fasteners 39, such as for example nails or screws and is secured
directly to the I-joists 32 by suitable fasteners (not shown), such
as for example nails or screws.
[0018] The I-joists 32 are toe-nailed to the sill plates 24 using
suitable fasteners 40, such as for example nails or screws. Angle
plates 42 are also secured to the upper surface of the sill plates
24 and the interior surface of the rim boards 22 using suitable
fasteners 44, such as for example nails or screws, at spaced
locations about the building structure.
[0019] Each insulated rim board 22 is of a three-piece structure
and comprises an intermediate insulating layer or core 60
sandwiched between and bonded to interior and exterior structural
layers or panels 62 and 64 respectively by suitable adhesive such
as for example urethane adhesive. In this embodiment, the
intermediate insulating layer 60 is formed of expanded polystyrene
(EPS) foam and has a thickness equal generally in the range of from
about 21/2'' to about 73/8''. The thickness of the intermediate
insulating layer 60 is selected to give the rim board 22 the
desired thermal rating. The interior and exterior structural layers
62 and 64 are formed of a suitable structural material such as for
example oriented strandboard (OSB) or plywood and have a thickness
generally in the range of from about 1/8'' to about 11/8''. The
thickness of the interior and exterior structural layers 62 and 64
is typically selected to give the rim board 22 the desired fire
rating. In this embodiment, the rim board 22 when viewed in side
elevation is symmetrical about a horizontal plane coincident with
the central longitudinal axis of the rim board 22. The rim board 22
is also symmetrical about a vertical plane coincident with the
central longitudinal axis of the rim board.
[0020] Typically, the rim boards 22 are manufactured in standard
widths W (e.g. 91/2'', 117/8'', 14'' and 16'') to match
conventional I-joist sizes. Notwithstanding, due to the symmetrical
design of the rim boards 22, the widths of the rim boards 22 can be
altered (i.e. reduced) on-site when needed to accommodate for
example steps, windows etc. without compromising the load bearing
characteristics or thermal characteristics of the rim boards 22. As
a result, rim boards 22 of any standard width can be tailored
on-site to satisfy construction needs.
[0021] FIG. 4 shows a floor structure employing an alternative rim
board 122. The rim board 122 is very similar to that described in
the previous embodiment and comprises interior and exterior
structural layers or panels 162 and 164 sandwiching an intermediate
insulating foam layer 160. Unlike the previous embodiment however,
the exterior structural layer 164 in this embodiment has an
increased vertical dimension W as compared to the interior
structural layer 162 and intermediate foam layer 160 and extends to
the building foundation 26. As a result, the sill plates 24 abut
the exterior structural layers 164 and only support the interior
structural layers 162 and intermediate foam layers of the rim
boards 122. The exterior structural layers 164 are supported by the
building structure foundation 26. Although the overall symmetry of
the rim board 122 is lost by extending the dimension of the
exterior structural layer 164, above the sill plates 24, the rim
board is symmetrical allowing the rim board 122 to be altered
on-site as discussed above to suit construction needs.
[0022] Although dimensions for the rim boards are provided above,
those of skill in the art will appreciate that the dimensional
information is exemplary. Depending on the environment in which the
rim boards are being deployed, the overall dimensions of the rim
boards may vary from those discussed above.
[0023] In the embodiments described above, the interior and
exterior structural layers are described as being formed of OSB or
plywood. Those of skill in the art will appreciate that the
interior and exterior structural layers may be formed of other
suitable structural material such as for example metal sheet, fire
resistant board etc. Also, the intermediate foam layers need not be
formed of EPS. Other foam material such as for example urethane
foam, polyurethane foam, isocyanurate foam etc. or other suitable
non-foam material such as for example honeycomb board may be
used.
[0024] Although embodiments have been described above with
reference to the drawings, those of skill in the art will
appreciate that variations and modifications may be made without
departing from the spirit and scope thereof as defined by the
appended claims.
* * * * *