Subframe support for retrofit roof

Abstract

A subframe configuration for a retrofit roof includes a subframe connected to the upper surface of a rib on an existing roof. The subframe is also connected to the valley/purlin of the existing roof. The connection can be a mechanical interference connection or one that is formed by a mechanical connector. The subframe of the disclosure includes a rib flange that extends from the bottom of the lip. The rib flange is disposed substantially parallel to the base of the subframe. When installed, a connector extends through the rib flange into a rib of the existing roof. Rib flange can be continuous or provided only at each or just some of the ribs.

Claims

1. A roof system comprising: a first roof panel supported by a support member; the first roof panel having at least one raised rib projecting above a valley; the at least one raised rib having an upper surface; a second roof panel; and a subframe positioned between the first roof panel and the second roof panel, the subframe including: a base; a first wall extending between the base and a top flange; a lip spaced apart from the first wall and extending down from the top flange; a rib flange extending from the lip and being connected to the raised rib above the valley; and the subframe defining a punch out passing through the base and the first wall wherein the punch out receives the raised rib of the first roof panel.

2. The roof system of claim 1, wherein the base, the first wall, and the lip form a self-supporting structure.

3. The roof system of claim 1, wherein the subframe is disposed on said first roof panel such that the raised rib extends in a direction generally perpendicular to the subframe.

4. The roof system of claim 1, wherein the subframe is connected to the support member through the first roof panel.

5. The roof system of claim 1, wherein the second roof panel is connected to the top flange of the subframe.

6. The roof system of claim 1, wherein the base, top flange, and rib flange are parallel.

7. The roof system of claim 1, wherein the lip includes an upper end and a lower end; the rib flange projecting from the lower end of the lip.

8. The roof system of claim 7, wherein the top flange is connected to the upper end of the lip.

9. The roof system of claim 1, further comprising insulation disposed between the first and second roof panels.

10. The roof system of claim 1, wherein the rib flange is connected to the upper surface of the at least one raised rib with a mechanical connector.

11. A roof system comprising: a first roof panel supported by a support member; the first roof panel having at least one raised rib projecting above a valley; the at least one raised rib having an upper surface; a second roof panel; and a subframe positioned between the first roof panel and the second roof panel, the subframe including: a base; a first wall extending between the base and a top flange; a lip spaced apart from the first wall and extending down from the top flange; a plurality of spaced rib flanges extending from the lip with each rib flange being connected to the raised rib above the valley; and the subframe defining a punch out passing through the base and the first wall wherein the punch out receives the raised rib of the first roof panel.

12. The roof system of claim 11, wherein the base, the first wall, and the lip form a self-supporting structure.

13. The roof system of claim 11, wherein the subframe is disposed on said first roof panel such that the raised rib extend in a direction generally perpendicular to the subframe.

14. The roof system of claim 11, wherein the subframe is connected to the support member through the first roof panel.

15. The roof system of claim 11, wherein the second roof panel is connected to the top flange of the subframe.

16. The roof system of claim 11, wherein the base, top flange, and rib flanges are parallel.

17. The roof system of claim 11, wherein the lip includes an upper end and a lower end; the rib flanges projecting from the lower end of the lip.

18. The roof system of claim 17, wherein the top flange is connected to the upper end of the lip.

19. The roof system of claim 11, further comprising insulation disposed between the first and second roof panels.

20. The roof system of claim 11, wherein the rib flange is connected to the upper surface of the at least one raised rib with a mechanical connector.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a perspective view of the first configuration of the prior art subframe.

(2) FIG. 2 is a section view of the taken through a rib of FIG. 1.

(3) FIG. 3 is an end view of the second configuration of the prior art subframe wherein the lips engage the rib.

(4) FIG. 4 is a perspective view of a first configuration of the subframe of the disclosure.

(5) FIG. 5 is section view of the subframe of FIG. 4.

(6) FIG. 6 is a perspective view of a second configuration of the subframe of the disclosure.

(7) FIG. 7 is a section view similar to FIG. 4 showing an alternative configuration of the subframe of the disclosure.

(8) Similar numbers refer to similar parts throughout the specification.

DETAILED DESCRIPTION OF THE DISCLOSURE

(9) The exemplary subframes of the disclosure are indicated generally by the reference number 2 in FIGS. 4-7. The different embodiments of subframes 2 are shown disposed over an existing roof 220 that includes a plurality of ribs 230. Each subframe 2 defines a punch out passing through its base and its first wall wherein the punch out receives the rib 230 of the existing roof 220. Subframe 2 can be made from the same materials and by the same manufacturing techniques as described above.

(10) Subframe 2 includes base 7 that is secured to purlin flange 212 through roof 220 with a fastener such as a screw or bolt. Wall 8 extends up substantially vertically from base 7 and can extend up from an edge of base 7. Wall 8 can also extend at a non-vertical angle. In either configuration, wall 8 taller than rib 230. Wall 8 also may extend substantially above the top of rib 230 to provide space for insulation. For example, wall 8 can be six, nine, twelve, fifteen, twenty or twenty four inches tall with rib 230 being one to three inches.

(11) A top flange 4 extends from the top of wall 8. In the exemplary configuration, top flange 4 extends in a direction opposite to base 7 to define an S shape in cross section. In another configuration, flange 4 can extend in the same direction as base 7 to define a C shape in cross section.

(12) Lip 5 extends down from the outer edge of flange 4 to engage the top of rib 230. Lip 5 can be vertical or disposed at a non-vertical angle.

(13) In the configuration of subframe 2 depicted in FIG. 7, flange 4 is removed and lip 5 extends down from the top of wall 8. Either lip 5 or wall 8 or both can be non-vertical. The combination of base 7, wall 8, and lip 5 provide a self-supporting structure. The configurations of FIGS. 5 and 7 can be used in combination

(14) A rib flange 10 extends outwardly from the lower edge of lip 5. Rib flange 10 is substantially parallel to base 7. Rib flange 10 can be continuous as shown in FIG. 5 or providing in spaced sections that are disposed only above ribs 230 as shown in FIG. 6. Rib flange 10 is connected to rib 230 with a mechanical connector such as a metal screw 11 or a rivet 11 or an interference fit such as a tab that extends from rib flange 10 into an opening defined by or formed in rib 230.

(15) Subframe 2 is thus connected to the existing roof with a pair of spaced connections which allows subframe 2 to resist lateral forces and torque forces. A retrofit roof 400 is connected to the subframes 2

(16) In the foregoing description, certain terms have been used for brevity, clearness, and understanding. No unnecessary limitations are to be implied therefrom beyond the requirement of the prior art because such terms are used for descriptive purposes and are intended to be broadly construed. Moreover, the descriptions and illustrations of the exemplary configurations are examples and the claimed invention is not limited to the exact details shown or described. Throughout the description and claims of this specification the words comprise and include as well as variations of those words, such as comprises, includes, comprising, and including are not intended to exclude additives, components, integers, or steps.