An apparatus attached to the roof perimeter to mitigate wind-generated vortices and uplift loads on the roof perimeter area of a building, applicable for both new constructions and retrofits of existing buildings. The apparatus comprises at least one face portion having face perforation and/or edge
An apparatus attached to the roof perimeter to mitigate wind-generated vortices and uplift loads on the roof perimeter area of a building, applicable for both new constructions and retrofits of existing buildings. The apparatus comprises at least one face portion having face perforation and/or edge serration for increasing small-scale turbulence entrainment, equalizing pressure and disorganizing edge shear layer vorticity, and thus disrupting vortex formation. A roof edge vortex suppressor is preferably mounted along the entire circumference of a roof perimeter.
대표청구항▼
1. An elongated device disposed along, and attached to, a perimeter of a roof, wherein the roof includes a roof component having an upper surface defining an uppermost surface of a roof assembly, the device comprising: a generally vertical face portion extending upwardly above a plane defined by the
1. An elongated device disposed along, and attached to, a perimeter of a roof, wherein the roof includes a roof component having an upper surface defining an uppermost surface of a roof assembly, the device comprising: a generally vertical face portion extending upwardly above a plane defined by the uppermost surface of the roof assembly without being underneath any roofing material on the roof or any roof covering on the roof,wherein the generally vertical face portion includes an uppermost part defining an unattached, free end of the generally vertical face portion,wherein the uppermost part of the generally vertical face portion comprises an edge serration, andwherein the generally vertical face portion has perforations; anda mounting portion securing said elongated device to said perimeter of the roof;wherein the elongated device extends along the perimeter of the roof at least substantially from one corner of the roof to at least a middle part of the roof perimeter. 2. The elongated device of claim 1, wherein the edge serration is defined by a plurality of serration elements, and wherein each of the serration elements has substantially the same size. 3. The elongated device of claim 1, wherein the edge serration is defined by a plurality of serration elements and wherein the serration elements comprise serration elements having sizes that differ from one another. 4. The elongated device of claim 3, wherein the serration elements comprise serration elements extending upwardly to differing heights above the plane defined by the uppermost surface of the roof assembly. 5. The elongated device of claim 3, wherein the plurality of serration elements define a row of serration elements, and wherein alternating serration elements along the row are shorter than other alternating serration elements along the row. 6. The elongated device of claim 1, wherein the edge serration is defined by a plurality of serration elements and wherein the serration elements comprise serration elements extending in directions that differ from one another. 7. The elongated device of claim 1, wherein the plurality of serration elements define a row of serration elements, and wherein alternating serration elements along the row are angled inwardly with respect to a vertical plane extending along the perimeter of the roof. 8. The elongated device of claim 1, wherein the edge serration is defined by a plurality of serration elements and wherein the plurality of serration elements comprise serration elements each having a respective top surface portion having a convex curved shape. 9. The elongated device of claim 1, wherein the edge serration is defined by a plurality of serration elements and wherein the perforations include perforations extending through portions of the serration elements. 10. The elongated device of claim 1, wherein the perforations include multiple rows of perforations extending along the length of the device. 11. The elongated device of claim 1, wherein the perforations include perforations having an elongated oval shape. 12. The elongated device of claim 1, wherein the generally vertical face portion extends upwardly at least six inches above the plane defined by the uppermost surface of the roof assembly. 13. The elongated device of claim 1, wherein the generally vertical face portion has an overall porosity of at least 40%. 14. The elongated device of claim 1, wherein the elongated device is disposed parallel to an edge of the roof. 15. The elongated device of claim 1, wherein the elongated device is disposed in contact with an edge of the roof. 16. The elongated device of claim 1, wherein the generally vertical face portion is disposed parallel to a wall surface located below the plane defined by the uppermost surface of the roof assembly. 17. An elongated device disposed along, and attached to, a perimeter of a roof, wherein the roof includes a roof component having an upper surface defining an uppermost surface of a roof assembly, the device comprising: a generally vertical face portion extending upwardly above a plane defined by the uppermost surface of the roof assembly without being underneath any roofing material on the roof or any roof covering on the roof,wherein the generally vertical face portion includes an uppermost part defining an unattached, free end of the generally vertical face portion,wherein the uppermost part of the generally vertical face portion comprises an edge serration, andwherein the generally vertical face portion has perforations; anda mounting portion securing said elongated device to said perimeter of the roof;wherein the elongated device extends along the perimeter of the roof continuously from one corner of the roof to another corner of the roof. 18. A method of suppressing roof edge vortex, comprising: securing an elongated device to a perimeter of a roof, the elongated device extending along the perimeter of the roof at least substantially from one corner of the roof to at least a middle part of the roof perimeter, and including a generally vertical face portion extending upwardly above a plane defined by an uppermost surface of a roof assembly of the roof without being underneath any roofing material on the roof or any roof covering on the roof, wherein the generally vertical face portion includes an uppermost part defining an unattached, free end of the generally vertical face portion,wherein the uppermost part of the generally vertical face portion comprises an edge serration, andwherein the generally vertical face portion has perforations, anda mounting portion; anddisrupting a formation of a roof edge vortex of wind coming into contact with the device. 19. The method of claim 18, wherein disrupting the formation of the roof edge vortex includes equalizing pressure across said generally vertical face portion. 20. The method of claim 18, wherein disrupting the formation of the roof edge vortex includes creating a flow-disorganizing effect with said edge serration of said generally vertical face portion. 21. The method of claim 18, wherein the securing comprises disposing the device parallel to an edge of the roof. 22. The method of claim 18, wherein the securing comprises disposing the device in contact with an edge of the roof. 23. The method of claim 18, wherein the generally vertical face portion is disposed parallel to a wall surface located below the plane defined by the uppermost surface of the roof assembly. 24. An elongated device disposed along, and attached to, a perimeter of a roof, wherein the roof includes a roof component having an upper surface defining an uppermost surface of a roof assembly, the device comprising: a generally vertical face portion extending upwardly above a plane defined by the uppermost surface of the roof assembly without being underneath any roofing material on the roof or any roof covering on the roof,wherein the generally vertical face portion includes an uppermost part defining an unattached, free end of the generally vertical face portion,wherein the uppermost part of the generally vertical face portion comprises an edge serration, andwherein the generally vertical face portion has perforations; anda mounting portion securing said elongated device to said perimeter of the roof;wherein a lower part of the generally vertical face portion is disposed outward beyond the roof perimeter. 25. A method of suppressing roof edge vortex, comprising: securing an elongated device to a perimeter of a roof, the elongated device being disposed along the perimeter and including a generally vertical face portion extending upwardly above a plane defined by an uppermost surface of a roof assembly of the roof without being underneath any roofing material on the roof or any roof covering on the roof, wherein the generally vertical face portion includes an uppermost part defining an unattached, free end of the generally vertical face portion,wherein the uppermost part of the generally vertical face portion comprises an edge serration,wherein the generally vertical face portion has perforations, andwherein a lower part of the generally vertical face portion is disposed outward beyond the roof perimeter, anda mounting portion; anddisrupting a formation of a roof edge vortex of wind coming into contact with the device.
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