CA2142207A1 - V-brace for floor joist systems - Google Patents
V-brace for floor joist systemsInfo
- Publication number
- CA2142207A1 CA2142207A1 CA 2142207 CA2142207A CA2142207A1 CA 2142207 A1 CA2142207 A1 CA 2142207A1 CA 2142207 CA2142207 CA 2142207 CA 2142207 A CA2142207 A CA 2142207A CA 2142207 A1 CA2142207 A1 CA 2142207A1
- Authority
- CA
- Canada
- Prior art keywords
- joists
- brace
- horizontal chord
- joist
- diagonal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000002023 wood Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 210000004906 toe nail Anatomy 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000009436 residential construction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
- E04B5/12—Load-carrying floor structures formed substantially of prefabricated units with wooden beams
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C2003/026—Braces
Abstract
A brace structure for a joist system having plural adjacent joists. First portions, preferably lower portions, of the joists are connected and supported by a horizontal chord. A pair of diagonal braces extend away from a central portion of the chord to second portions, preferably upper portions, of the adjacent joists. The diagonal braces preferably abut each other at the chord to form a V shaped structure with the vertex of the V at the chord and the arms of the V terminating at the joists. The braces, chord and joists are fixed to each other as by nailing where they meet.
Description
_ 21~2~07 TITLE OF THE INVENTION:
V-Brace for Floor Joist Systems NAME(S) OF INVENTOR(S):
David Richard Owen Cameron Vetsch FIELD OF THE INVENTION
This invention relates to bridging for joist systems.
R~ ROUND OF THE INVENTION
Joists are vertical beams, typically steel or wood or a combination of steel and wood, that provide direct support for a floor. The joists typically lie parallel to each other. Examples of joist systems include arrays of 2x10 beams, I-beams and webbed joist systems, the latter including 2x4 members separated by webbed metal. All dimensions are in nominal inches. It is desirable, and sometimes necessary, to brace adjacent joists so that they maintain their vertical position under the floor.
Numerous ways of providing brace structures between adjacent joists have been proposed such as:
(A) A cross brace has been used that include a first brace extending from the top of one (first) joist to the bottom of another (second) joist, and a second brace extending between the top of the second joist and the bottom of the first. The braces cross each other more or less in the middle between the joists.
(B) A ~ingle chord extending from the bottom of one joist to the bottom of an adjacent joist.
(C) A unitary .-~'e~ plate extending across the whole space between adjacent joists.
(D) A unitary plate as in example (C) but made with metal and having an Op9~ n~ in the middle for heating ducts and the like to pass through.
(E) A combination of (A) and (B) in which a cross-brace is formed above a chord extending between adjacent joists.
Each of these prior art brace structures is deficient in some way. Examples A, C and E do not allow heating ducts and the like to be readily located between the joists. Example D is expensive. Example B
is not very stable.
The inventor has proposed a novel brace structure that overcomes the disadvantages of the known prior art.
SUMMARY OF THE INVENTION
The inventor has thus provided a brace structure for a joist system having plural adjacent joists. First portions, preferably lower portions, of the joists are connected and supported by a horizontal chord. A pair of diagonal braces extend away from a central portion of the chord to second portions, preferably upper portions, of the adjacent joists. The diagonal braces preferably abut each other at the chord to form a V shaped structure with the vertex of the V at the chord and the arms of the V terminating at the joists. The braces, chord and joists are fixed to each other as by nailing where they meet.
Such a design provides space for heating ducts while being simple and inexpensive to make.
~ Z142207 BRIEF DESCRIPTION OF THE DRAWINGS
There will now be described preferred embodiments of the invention, with reference to the drawings, by way of illustration, in which like numerals denote like elements and in which:
Fig. 1 is a perspective view of an embodiment of the invention for use with 2x10 joists;
Fig. 2 is a perspective view of an embodiment of the invention for use with I-beam joists; and Fig. 3 is a perspective view of an embodiment of the invention for use with webbed joists.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
Referring to Fig. 1, there is shown a brace structure generally designated 10 for a joist system having adjacent first and second joists 11 and 12, each of the joists 11 and 12 being vertically oriented, and having a top portion lla, 12a and a bottom portion llb, 12b. Only two joists of the joist system are shown: typical joist systems are composed of multiple joists spaced in like manner to the two shown. The joists of Fig. 1 are nominal 2x10 wooden beams.
The brace structure 10 is formed from a horizontal chord 13 extending between and fixed to (as for example by toe nails 19 or like means) the bottom portions llb, 12b of adjacent joists 11, 12. The horizontal chord 13 has a central portion 14. A first diagonal brace 15 extends from the top portion lla of the first joist 11 to the central portion 14 of the horizontal chord 13. A second diagonal brace 16 extends from the top portion 12a of the second joist 12 to the central portion 14 of the horizontal chord 13. The first and second diagonal braces 15, 16 are fixed at one of their ends to the first and second respective joists 11, 12 respectively by toe nails 17 or like means. Each of the first and second diagonal braces 15, 16 is secured at their respective other ends to the horizontal chord 13 by spiked plates 18 or like means, such as toe nails. Preferably, the first and second diagonal braces 15, 16 abut each other, end to end, at the horizontal chord 13 to form a V shape with the vertex of the V at the chord 13 and the arms of the V terminating at the joists 11, 12.
The braces 15, 16 and chord 13 may be made of wood, metal or plastic, and dimensioned to suit the application. In much residential construction, nominal 2x4, 2x3 or 2x2 wooden studs or split 2x6 boards may be used for the braces and the chord, and may be made of scrap lumber, thus reducing the cost of manufacture. The first and second braces 15, 16 need not be abutting but should be fixed to the chord 13 far enough away from the joists 11, 12 respectively to give support to the joists. The braces 15, 16 preferably extend from the top portions lla, 12a of the joists 11, 12 but may be fixed to a point below the top portions. However, fixation to the top portions lla, 12a is desirable for added stability.
Numerous such brace structures 10 may be located along the length of the joists 11, 12, spaced in conventional manner to give support to the joists. The space formed between the braces 15, 16 may be used for the placement of heating ducts and the like.
The embodiments of Figs. 2 and 3 are identical in terms of brace structure to that of Fig.
1 and like numerals are used to designate like parts.
-- 214Z2~7 However, Fig. 2 shows an exemplary joist system of the I-beam type, with the top portions 21a, 22a and bottom portions 21b, 22b of adjacent joists 21, 22 each typically formed of a nominal 2x4 or 2x3 wooden stud, with fibre board 23 or the like forming the panel between the studs. Fig. 3 shows an exemplary joists system of the web type, with the top portions 31a, 32a and bottom portions 31b, 32b of adjacent joists 31, 32 each formed of a nominal 2x4 wooden stud, with metal struts or wooden web 33 forming the supporting structure between the studs. While the invention has been described in relation to floors, the same system may be used in roofs.
A person skilled in the art could make immaterial modifications to the invention described and claimed in this patent without departing from the essence of the invention.
V-Brace for Floor Joist Systems NAME(S) OF INVENTOR(S):
David Richard Owen Cameron Vetsch FIELD OF THE INVENTION
This invention relates to bridging for joist systems.
R~ ROUND OF THE INVENTION
Joists are vertical beams, typically steel or wood or a combination of steel and wood, that provide direct support for a floor. The joists typically lie parallel to each other. Examples of joist systems include arrays of 2x10 beams, I-beams and webbed joist systems, the latter including 2x4 members separated by webbed metal. All dimensions are in nominal inches. It is desirable, and sometimes necessary, to brace adjacent joists so that they maintain their vertical position under the floor.
Numerous ways of providing brace structures between adjacent joists have been proposed such as:
(A) A cross brace has been used that include a first brace extending from the top of one (first) joist to the bottom of another (second) joist, and a second brace extending between the top of the second joist and the bottom of the first. The braces cross each other more or less in the middle between the joists.
(B) A ~ingle chord extending from the bottom of one joist to the bottom of an adjacent joist.
(C) A unitary .-~'e~ plate extending across the whole space between adjacent joists.
(D) A unitary plate as in example (C) but made with metal and having an Op9~ n~ in the middle for heating ducts and the like to pass through.
(E) A combination of (A) and (B) in which a cross-brace is formed above a chord extending between adjacent joists.
Each of these prior art brace structures is deficient in some way. Examples A, C and E do not allow heating ducts and the like to be readily located between the joists. Example D is expensive. Example B
is not very stable.
The inventor has proposed a novel brace structure that overcomes the disadvantages of the known prior art.
SUMMARY OF THE INVENTION
The inventor has thus provided a brace structure for a joist system having plural adjacent joists. First portions, preferably lower portions, of the joists are connected and supported by a horizontal chord. A pair of diagonal braces extend away from a central portion of the chord to second portions, preferably upper portions, of the adjacent joists. The diagonal braces preferably abut each other at the chord to form a V shaped structure with the vertex of the V at the chord and the arms of the V terminating at the joists. The braces, chord and joists are fixed to each other as by nailing where they meet.
Such a design provides space for heating ducts while being simple and inexpensive to make.
~ Z142207 BRIEF DESCRIPTION OF THE DRAWINGS
There will now be described preferred embodiments of the invention, with reference to the drawings, by way of illustration, in which like numerals denote like elements and in which:
Fig. 1 is a perspective view of an embodiment of the invention for use with 2x10 joists;
Fig. 2 is a perspective view of an embodiment of the invention for use with I-beam joists; and Fig. 3 is a perspective view of an embodiment of the invention for use with webbed joists.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
Referring to Fig. 1, there is shown a brace structure generally designated 10 for a joist system having adjacent first and second joists 11 and 12, each of the joists 11 and 12 being vertically oriented, and having a top portion lla, 12a and a bottom portion llb, 12b. Only two joists of the joist system are shown: typical joist systems are composed of multiple joists spaced in like manner to the two shown. The joists of Fig. 1 are nominal 2x10 wooden beams.
The brace structure 10 is formed from a horizontal chord 13 extending between and fixed to (as for example by toe nails 19 or like means) the bottom portions llb, 12b of adjacent joists 11, 12. The horizontal chord 13 has a central portion 14. A first diagonal brace 15 extends from the top portion lla of the first joist 11 to the central portion 14 of the horizontal chord 13. A second diagonal brace 16 extends from the top portion 12a of the second joist 12 to the central portion 14 of the horizontal chord 13. The first and second diagonal braces 15, 16 are fixed at one of their ends to the first and second respective joists 11, 12 respectively by toe nails 17 or like means. Each of the first and second diagonal braces 15, 16 is secured at their respective other ends to the horizontal chord 13 by spiked plates 18 or like means, such as toe nails. Preferably, the first and second diagonal braces 15, 16 abut each other, end to end, at the horizontal chord 13 to form a V shape with the vertex of the V at the chord 13 and the arms of the V terminating at the joists 11, 12.
The braces 15, 16 and chord 13 may be made of wood, metal or plastic, and dimensioned to suit the application. In much residential construction, nominal 2x4, 2x3 or 2x2 wooden studs or split 2x6 boards may be used for the braces and the chord, and may be made of scrap lumber, thus reducing the cost of manufacture. The first and second braces 15, 16 need not be abutting but should be fixed to the chord 13 far enough away from the joists 11, 12 respectively to give support to the joists. The braces 15, 16 preferably extend from the top portions lla, 12a of the joists 11, 12 but may be fixed to a point below the top portions. However, fixation to the top portions lla, 12a is desirable for added stability.
Numerous such brace structures 10 may be located along the length of the joists 11, 12, spaced in conventional manner to give support to the joists. The space formed between the braces 15, 16 may be used for the placement of heating ducts and the like.
The embodiments of Figs. 2 and 3 are identical in terms of brace structure to that of Fig.
1 and like numerals are used to designate like parts.
-- 214Z2~7 However, Fig. 2 shows an exemplary joist system of the I-beam type, with the top portions 21a, 22a and bottom portions 21b, 22b of adjacent joists 21, 22 each typically formed of a nominal 2x4 or 2x3 wooden stud, with fibre board 23 or the like forming the panel between the studs. Fig. 3 shows an exemplary joists system of the web type, with the top portions 31a, 32a and bottom portions 31b, 32b of adjacent joists 31, 32 each formed of a nominal 2x4 wooden stud, with metal struts or wooden web 33 forming the supporting structure between the studs. While the invention has been described in relation to floors, the same system may be used in roofs.
A person skilled in the art could make immaterial modifications to the invention described and claimed in this patent without departing from the essence of the invention.
Claims (11)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS
FOLLOWS:
1. A brace structure and joist system having adjacent first and second joists having facing sides, each of the joists being vertically oriented, and having a top portion and a bottom portion, the brace structure comprising:
a horizontal chord extending between and fixed to the sides of adjacent joists, the horizontal chord having a central portion;
a first diagonal brace extending from the side of the first joist to the central portion of the horizontal chord;
a second diagonal brace separate from the first diagonal brace extending from the side of the second joist to the central portion of the horizontal chord;
the first and second diagonal braces being fixed to the facing sides of the first and second respective joists respectively; and means to secure each of the first and second diagonal braces to the horizontal chord.
a horizontal chord extending between and fixed to the sides of adjacent joists, the horizontal chord having a central portion;
a first diagonal brace extending from the side of the first joist to the central portion of the horizontal chord;
a second diagonal brace separate from the first diagonal brace extending from the side of the second joist to the central portion of the horizontal chord;
the first and second diagonal braces being fixed to the facing sides of the first and second respective joists respectively; and means to secure each of the first and second diagonal braces to the horizontal chord.
2. The brace structure and joist system of claim 1 in which the horizontal chord extends between bottom portions of adjacent joists.
3. The brace structure and joist system of claim 2 in which the first diagonal brace is fixed to the top portion of the first joist and the second diagonal brace is fixed to the top portion of the second joist.
4. The brace structure and joist system of claim 3 in which the first and second diagonal braces abut each other at the horizontal chord thereby forming a V shaped structure with the vertex of the V
at the horizontal chord and the arms of the V
terminating at the joists.
at the horizontal chord and the arms of the V
terminating at the joists.
5. The brace structure and joist system of claim 1 in which the first and second diagonal braces and horizontal chord are made of wood.
6. The brace structure and joist system of claim 2 in which the first and second diagonal braces and horizontal chord are made of wood.
7. The brace structure of claim 5 in which the first and second diagonal braces are joined to each other and to the horizontal chord by at least one spiked plate.
8. A brace structure for a joist system having spaced adjacent first and second joists having facing sides, each of the joists being vertically oriented, and having a top portion and a bottom portion, the brace structure comprising:
a horizontal chord having a length about equal to the space between the sides of adjacent joists, the horizontal chord having a central portion;
a first diagonal brace having a length sufficient to allow it to extend from the side of the first joist to the central portion of the horizontal chord;
a second diagonal brace separate from the first diagonal brace and having a length sufficient to allow it to extend from the side of the second joist to the central portion of the horizontal chord;
the first and second diagonal braces being fixable to the facing sides of the first and second respective joists respectively; and means to secure each of the first and second diagonal braces to the horizontal chord.
a horizontal chord having a length about equal to the space between the sides of adjacent joists, the horizontal chord having a central portion;
a first diagonal brace having a length sufficient to allow it to extend from the side of the first joist to the central portion of the horizontal chord;
a second diagonal brace separate from the first diagonal brace and having a length sufficient to allow it to extend from the side of the second joist to the central portion of the horizontal chord;
the first and second diagonal braces being fixable to the facing sides of the first and second respective joists respectively; and means to secure each of the first and second diagonal braces to the horizontal chord.
9. The brace structure of claim 8 in which the first and second diagonal braces abut each other at the horizontal chord thereby forming a V shaped structure with the vertex of the V at the horizontal chord.
10. The brace structure of claim 8 in which the first and second diagonal braces and horizontal chord are made of wood.
11. The brace structure of claim 8 in which the first and second diagonal braces are joined to each other and to the horizontal chord by at least one spiked plate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US21299794A | 1994-03-15 | 1994-03-15 | |
| US08/212,997 | 1994-03-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2142207A1 true CA2142207A1 (en) | 1995-09-16 |
Family
ID=22793320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2142207 Abandoned CA2142207A1 (en) | 1994-03-15 | 1995-02-09 | V-brace for floor joist systems |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2142207A1 (en) |
-
1995
- 1995-02-09 CA CA 2142207 patent/CA2142207A1/en not_active Abandoned
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |