SYSTEM AND METHOD OF SECURING A ROOF TRUSS TO A LOAD-BEARING WALL
20230304290 · 2023-09-28
Assignee
Inventors
Cpc classification
International classification
Abstract
A system and method for securing a roof truss to a load bearing wall is disclosed. A strap is attached to a roof truss at one end and extended to the top of a load-bearing wall. A buckle is placed over the strap to secure the strap between the buckle and the roof truss, and also the buckle and the load-bearing wall. The end of the strap is extended along the top of buckle toward the roof truss and a top plate secures the strap between the buckle and the top plate. Screws are placed through holes in the top plate and corresponding holes in the buckle to attach the system to the top of the load-bearing wall. The system and method of the invention provides both horizontal (lateral) resistance and uplift resistance, thus resisting horizontal (lateral) forces while at the same time providing uplift resistance.
Claims
1. A system for securing a first structural roof member to a second structural roof member, comprising: a strap having an upper end and a lower end; a buckle, and a top plate, wherein the upper end of the strap is secured to a vertical side of a second structural roof member; wherein the lower end of the strap is secured between a top surface of a first structural roof member and a bottom surface of the buckle; wherein thereafter the lower end of the strap is further secured between a bottom surface of the top plate and a top surface of the buckle, wherein the buckle and top plate are secured to the first structural roof member with one or more connectors.
2. The system of claim 1, wherein the buckle comprises a top element and a bottom element, wherein the top element comprises an angled arm, wherein the bottom element comprises a horizontal arm, wherein a top surface of the angled arm is disposed at approximately 135 degrees to a top surface of the horizontal arm, wherein the lower end of the strap is secured between a bottom surface of the horizontal arm, wherein thereafter the lower end of the strap is secured between the top surface of the angled arm and the bottom surface of the top plate.
3. The system of claim 1, wherein the buckle comprises a first element, a second element and a third element, wherein the first element comprises a vertical arm, wherein the second element comprises an angled arm and wherein the third element comprises a horizontal arm, wherein the lower end of the strap is secured between the vertical arm of the buckle and vertical side of the second structural roof member, wherein thereafter the lower end of the strap is secured between a bottom surface of the horizontal arm, wherein thereafter the lower end of the strap is secured between a top surface of the angled arm and the bottom surface of the top plate.
4. The system of claim 1, wherein the strap is galvanized.
5. The system of claim 1, wherein the strap is a straight strap.
6. The system of claim 1, wherein the first structural roof member comprises a load-bearing wall and the second structural roof member comprises a roof truss.
7. The system of claim 6, wherein the first structural roof member comprises a wooden top plate or a concrete tie beam.
8. The system of claim 1, wherein the connectors comprise wedge bolts, nails, screws or combinations thereof.
9. A method of securing a first structural roof member to a second structural roof member, comprising: attaching an upper end of a strap to a vertical side of a second structural roof member, the strap comprising an upper end and a distal end; extending the distal end of the strap downward along the vertical side of the second structural roof member and thereafter extending the distal end of the strap horizontally along a top surface of a first structural roof member; disposing a bottom surface of a buckle atop a top surface of the distal end of the strap; thereafter extending the distal end of the strap along a top surface of the buckle; disposing a top plate along the top surface of the buckle, wherein the distal end of the strap is secured between a bottom surface of the top plate and the top surface of the buckle; and thereafter connecting the top plate and buckle to the top surface of the first structural roof member.
10. The method of claim 9, wherein the buckle comprises a top element and a bottom element, wherein the top element of the buckle comprises an angled arm, wherein the bottom element of the buckle comprises a horizontal arm, wherein a top surface of the angled arm is disposed at approximately 135 degrees to a top surface of the horizontal arm, wherein the distal end of the strap is secured between a bottom surface of the horizontal arm and the top surface of the first structural roof member, wherein thereafter the distal end of the strap is secured between the top surface of the angled arm and the bottom surface of the top plate.
11. The method of claim 9, wherein the buckle comprises a first element, a second element and a third element, wherein the first element comprises a vertical arm, wherein the second element comprises an angled arm and wherein the third element comprises a horizontal arm, wherein the distal end of the strap is secured between the vertical arm of the buckle and the vertical side of the second structural roof member, wherein thereafter the distal end of the strap is secured between a bottom surface of the horizontal arm, wherein thereafter the distal end of the strap is secured between a top surface of the angled arm and the bottom surface of the top plate.
12. The method of claim 9, wherein the strap is galvanized.
13. The method of claim 9, wherein the strap is a straight strap.
14. The method of claim 9, wherein the first structural roof member comprises a load-bearing wall and the second structural roof member comprises a roof truss.
15. The method of claim 14, wherein the first structural roof member comprises a wooden top plate or a concrete tie beam.
16. The method of claim 9, wherein the connectors comprise wedge bolts, nails, screws or combinations thereof.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0028] The invention will be more readily understood from the following detailed description of the various aspects of the invention taken in conjunction with the accompanying drawings in which:
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DETAILED DESCRIPTION OF THE INVENTION
[0040] The invention relates to a system and method of securing a roof truss to a load bearing wall. The strap and buckle comprising the invention when combined provide both horizontal (lateral) resistance and uplift resistance, thus resisting horizontal (lateral) forces while at the same time providing uplift resistance.
[0041] In one embodiment, the system comprises an angled strap for securing a second structural roof member, such as a roof truss, to a first structural roof member, such as a load-bearing wall. The angled strap is substantially flat and comprises a flat central portion and two arms disposed at a substantially 22-degree angle from the flat central portion which allows the angled strap to extend almost vertically straight when installed over the top of the second structural roof member. The flat central portion of the angled strap is secured to the top of the second structural roof member and each free end of the angled strap extends downward along opposing vertical sides of the second structural roof member to the top of the first structural roof member. The angled strap may comprise 14 gauge - 20 gauge steel. The angled strap may be galvanized.
[0042] In one embodiment, the angled strap is approximately 1 ¼ inches wide and the substantially flat central portion is about 1 ½ inches long to fit over the top of a 2 x 6 wood roof truss which is approximately 1 ½ inch wide. Such an angled strap can be used for up to a 6/12 roof pitch. In one embodiment, the length of the substantially flat central portion is 3 inches and 3 ¼ inches wide to fit over the top of two standard roof trusses that have been attached to each other. In other embodiments, the length of the substantially flat portion of the angled strap and the width of the angled strap varies vary according to the size of the roof truss. In other embodiments, the angle of the arms of the angled strap and the substantially flat central portion can be greater than 22 degrees for roofs with pitch steeper than 6/12. The angled strap may comprise a plurality of holes for securing the angled strap to a roof truss, allowing for variations of the size of the roof truss.
[0043] In one embodiment, the system comprises a buckle and a top plate, where the buckle comprises a bracket with a vertical arm and a horizontal arm connected by a flat connector, where the flat connector is disposed at an angle to both the vertical arm and the horizontal arm. The vertical arm of the buckle is attached to the vertical side of a second structural roof member by inserting wedge bolts, nails, screws or other suitable connectors through predrilled holes in the vertical arm. In one embodiment, the horizontal arm of the buckle is attached to the top surface of a first structural roof member by inserting wedge bolts, nails, screws or other suitable connectors through predrilled holes in the horizontal arm. In one embodiment, the buckle and top plate are attached to the top surface of the first structural roof member by inserting wedge bolts, nails, screws or other suitable connectors through predrilled holes in each of the flat connector and the top plate, where the predrilled holes are substantially in alignment. In one embodiment, the screws or other suitable connectors that are used to attach the buckle and top plate to the first structural roof member are larger in diameter than the predrilled holes in the flat connector of the buckle. In one embodiment, screws used to attach the buckle and top plate to the first structural roof member are approximately ¼” in diameter and the predrilled holes in the flat connector of the buckle are approximately 3/16″ in diameter.
[0044] In one embodiment, the system comprises an angled strap, two (2) buckles as previously described and two (2) top plates as previously described. The flat central portion of the angled strap is attached to the top of the second structural roof member. Each arm of the angled strap is extended from each side of the second structural roof member to the top of a first structural roof member. A buckle is placed at each intersection of the first structural roof member, such as the top of a load-bearing wall, and each vertical side of the second structural roof member, such as the side of a roof truss, such that the horizontal arms of each buckle are placed on top of each of the extended arms of the angled strap along the horizontal top surface of the first structural roof member. The horizontal arm of each buckle is attached to the top of the first structural roof member on each side of the second structural roof member. The vertical arm of each buckle is attached to the side of the second structural roof member, securing the extended arms of the angled strap between each vertical arm of the buckle and the vertical side of the second structural roof member, and between each horizontal arm of the buckle and the horizontal top surface of the first structural roof member. The free end of each arm of the angled strap is then extended back toward the second structural roof member over the exposed surfaces of each horizontal arm of each buckle. A top plate is placed over the free end of each arm of the angled strap such that it mates with the flat connector and secures one arm of the angled strap between a top plate and a flat connector. Each top plate is then attached to the first structural roof member by connectors, such as screws, that extend through holes in each top plate and corresponding holes in each flat connector.
[0045] In one embodiment, the angled strap comprises 14 gauge - 20 gauge steel. In one embodiment, the angled strap is galvanized. In one embodiment, the angled strap is approximately 1 ¼ inches wide and the substantially flat central portion is about 1 ½ inches long to fit over the top of a 2 x 6 wood roof truss which is approximately 1 ½ inch wide. Such an angled strap can be used for up to a 6/12 roof pitch. In one embodiment, the length of the substantially flat central portion is 3 inches and 3 ¼ inches wide to fit over the top of two standard trusses that have been attached to each other. In other embodiments, the length of the substantially flat portion of the angled strap and the width of the angled strap vary according to the size of the roof truss. In other embodiments, the angle of the arms of the angled strap and the substantially flat central portion can be greater than 22 degrees for roofs with pitch steeper than 6/12. The angled strap may comprise a plurality of holes for securing the strap to a roof truss, allowing for variations of the size of the roof truss. In one embodiment, the free ends of the first arm and second arm of the angled strap proximate the first structural roof member are solid. The absence of holes in the free ends of the first arm and the second arm of the angled strap proximate the load-bearing wall strengthens the angled strap because the angled strap has more cross-sectional area to resist tension due to uplift resistance. In one embodiment, the angled strap may comprise a plurality of holes at the free end of the arms to secure the angled strap to the top of a load-bearing wall.
[0046] In one embodiment, the vertical arm of the buckle is attached to the side of a second structural roof member by inserting screws or other suitable connectors through predrilled holes in the vertical arm. In one embodiment, the horizontal arm of the buckle is attached to the top surface of a first structural roof member by inserting screws or other suitable connectors through predrilled holes in the horizontal arm. In one embodiment, the buckle and top plate are attached to the top surface of the first structural roof member by inserting screws or other suitable connectors through predrilled holes in each of the flat connector and the top plate, where the predrilled holes are substantially in alignment. In one embodiment, the screws or other suitable connectors that are used to attach the buckle and top plate to the first structural roof member are larger in diameter than the predrilled holes in the flat connector of the buckle. In one embodiment, screws are used to attach the buckle and top plate to the first structural roof member are approximately ¼″ in diameter and the predrilled holes in the flat connector of the buckle are approximately 3/16″ in diameter.
[0047] In one embodiment, the system comprises a straight strap, a buckle and a top plate as previously described. The straight strap is attached to the top of the second structural roof member and the free end of the straight strap extends to the top of a first structural roof member. A buckle is placed at the intersection of the first structural roof member, such as the top of a load-bearing wall, and the vertical side of the second structural roof member, such as the side of a roof truss, such that the horizontal arm of the buckle is placed on top of the free end of the straight strap along the horizontal top surface of the first structural roof member. The horizontal arm of the buckle is attached to the top of the first structural roof member on the side of the second structural roof member. The vertical arm of the buckle is attached to the side of the second structural roof member, securing the free end of the straight strap between the vertical arm of the buckle and the vertical side of the second structural roof member, and between the horizontal arm of the buckle and the horizontal top surface of the first structural roof member. The free end of the straight strap is then extended back toward the second structural roof member over the exposed surfaces of the horizontal arm of the buckle. A top plate is placed over the free end of the straight strap such that it mates with the flat connector and secures the free end of the straight strap between the top plate and the flat connector of the buckle. The top plate is then attached to the first structural roof member by connectors, such as screws, that extend through holes in the top plate and corresponding holes in the flat connector.
[0048] In one embodiment, the straight strap comprises 14 gauge - 20 gauge steel. In one embodiment, the straight strap is galvanized. In one embodiment, the straight strap is approximately 1 ¼ inches wide. The straight strap may comprise a plurality of holes for securing the straight strap to a second structural roof member allowing for variations of the size of the second structural roof member. The straight strap may further comprise a plurality of holes for securing the straight strap to a first structural roof member allowing for variations of the size of the first structural roof member.
[0049] In one embodiment, the vertical arm of the buckle is attached to the side of a second structural roof member by inserting screws or other suitable connectors through predrilled holes in the vertical arm. In one embodiment, the horizontal arm of the buckle is attached to the top surface of a first structural roof member by inserting screws or other suitable connectors through predrilled holes in the horizontal arm. In one embodiment, the buckle and top plate are attached to the top surface of the first structural roof member by inserting screws or other suitable connectors through predrilled holes in each of the flat connector and the top plate, where the predrilled holes are substantially in alignment. In one embodiment, the screws or other suitable connectors that are used to attach the buckle and top plate to the first structural roof member are larger in diameter than the predrilled holes in the flat connector of the buckle. In one embodiment, screws are used to attach the buckle and top plate to the first structural roof member are approximately ¼″ in diameter and the predrilled holes in the flat connector of the buckle are approximately 3/16″ in diameter.
[0050] In one embodiment, the buckle and/or the top plate are fastened to the first structural roof member using tap-cons. In one embodiment, the extended arm of the straight strap is secured between the top of the first structural roof member and the horizontal arm of a single buckle. In one embodiment, one or more nails are placed in the free end of the first arm and second arm of the straight strap, preventing the straight strap from slipping through the buckles and/or flat plate.
[0051] In one embodiment, the system comprises a strap, a buckle and a top plate, where the buckle comprises a bracket having a horizontal arm and an angled arm. One end of the strap is attached to the top of the vertical side of the second structural roof member and the free end of the strap is extended down the second structural roof member. Prior to the intersection of the first structural roof member and the second structural roof member, the strap is bent to a first angle of approximately 135 degrees downward in the direction of the first structural roof member. The strap extends for a distance, and then the strap is bent to a second angle of approximately 135 degrees such that the strap extends along the top surface of the first structural roof member. The angled arm of the buckle is placed atop the portion of the strap between the first angle and the second angle, and the horizontal arm of the buckle is placed atop the portion of the strap that extends along the top surface of the first structural roof member. The top plate is placed atop the angled arm of the buckle. The angled arm and horizontal arm of the buckle are attached to the top surface of the first structural roof member. The free end of the strap is extended back toward the second structural roof member over the exposed surface of the horizontal arm of the buckle, whereupon the top plate is placed on the angled arm. The top plate is attached to the top surface of the first structural roof member such that it secures the free end of the strap between the top plate and the angled arm.
[0052] In one embodiment, the straight strap comprises 14 gauge - 20 gauge steel. In one embodiment, the strap is galvanized. In one embodiment, the strap is approximately 1 ¼ inches wide. The strap may comprise a plurality of holes for securing the strap to a second structural roof member allowing for variations of the size of the second structural roof member. The strap may further comprise a plurality of holes for securing the strap to a first structural roof member allowing for variations of the size of the first structural roof member.
[0053] In one embodiment, the horizontal arm and the angled arm of the buckle are attached to the top surface of a first structural roof member by inserting screws or other suitable connectors through predrilled holes in the horizontal arm and the angled arm. In one embodiment, the buckle and top plate are attached to the top surface of the first structural roof member by inserting screws or other suitable connectors through predrilled holes in each of the horizontal arm, the angled arm and the top plate, where the predrilled holes are substantially in alignment. In one embodiment, the screws or other suitable connectors that are used to attach the buckle and top plate to the first structural roof member are larger in diameter than the predrilled holes in the flat connector of the buckle. In one embodiment, screws are used to attach the buckle and top plate to the first structural roof member are approximately ¼” in diameter and the predrilled holes in the flat connector of the buckle are approximately 3/16″ in diameter.
[0054] In one embodiment, the buckle and/or the top plate are fastened to the first structural roof member using tap-cons. In one embodiment, the extended arm of the strap is secured between the top of the first structural roof member and the horizontal arm of the buckle. In one embodiment, one or more nails are placed in the free end of the strap, preventing the strap from slipping through the buckle and/or top plate.
[0055] In one embodiment, the system comprises a strap, a buckle and a top plate, where the buckle comprises a vertical arm, an angled arm and a horizontal arm. One end of the strap is attached to the top of the vertical side of the second structural roof member and the free end of the strap is extended down the second structural roof member and along the top surface of the first structural roof member. The buckle is placed at the intersection of the first structural roof member and the vertical side of the second structural roof member such that the free end of the strap is secured between the vertical arm of the buckle and the vertical side of the second structural roof member, and also is secured between the horizontal arm of the buckle and the top of the first structural roof member. The free end of the strap is then placed along the top surface of the angled arm of the buckle, and the top plate is placed atop the angled arm of the buckle, securing the strap between the angled arm of the buckle and the top plate.
[0056] In one embodiment, the strap comprises 14 gauge - 20 gauge steel. In one embodiment, the strap is galvanized. In one embodiment, the strap is approximately 1 ¼ inches wide. The strap may comprise a plurality of holes for securing the strap to a second structural roof member allowing for variations of the size of the second structural roof member. The strap may further comprise a plurality of holes for securing the straight strap to a first structural roof member allowing for variations of the size of the first structural roof member.
[0057] In one embodiment, the vertical arm of the buckle is attached to the side of a second structural roof member by inserting screws or other suitable connectors through predrilled holes in the vertical arm. In one embodiment, the buckle and top plate are attached to the top surface of the first structural roof member by inserting screws or other suitable connectors through predrilled holes in each of the angled arm and the top plate, where the predrilled holes are substantially in alignment. In one embodiment, the screws or other suitable connectors that are used to attach the buckle and top plate to the first structural roof member are larger in diameter than the predrilled holes in the flat connector of the buckle. In one embodiment, screws are used to attach the buckle and top plate to the first structural roof member are approximately ¼” in diameter and the predrilled holes in the flat connector of the buckle are approximately 3/16″ in diameter.
[0058] In one embodiment, the buckle and/or the top plate are fastened to the first structural roof member using tap-cons. In one embodiment, the free arm of the strap is secured between the top of the first structural roof member and the horizontal arm of the buckle. In one embodiment, one or more nails are placed in the free end of the first arm and second arm of the strap, preventing the strap from slipping through the buckles and/or flat plate.
[0059] The first structural roof member may comprise a load-bearing wall which comprises a top plate (if wood) or concrete (if a tie beam). The second structural roof member may comprise a roof truss.
[0060] Turning to the figures,
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[0071] The foregoing description of various embodiments of the invention has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed and, obviously, many modifications and variations are possible. While the invention has been described in terms of a roof truss and a load-bearing wall, the invention is not limited to such a purpose. Modifications and variations that may be apparent to a person skilled in the art are intended to be included within the scope of the invention as defined by the accompanying claims.