Trapezoidal rib mounting bracket with flexible legs

1. A mounting bracket adapted to be secured to a trapezoidal rib of a building surface, comprising:

an upper wall with a first thickness measured in a vertical direction, a first side, and a second side spaced from the first side by a first width measured in a lateral direction that is perpendicular to the vertical direction;

a mounting aperture extending through the upper wall;

a first sidewall extending from the first side of the upper wall, the first sidewall comprising:

a first interior surface comprising a first planar portion oriented approximately perpendicular to the upper wall; and

a second thickness measured in the lateral direction through the first planar portion, wherein the second thickness is less than the first thickness;

a second sidewall extending from the second side of the upper wall, the second sidewall comprising a second interior surface comprising a second planar portion oriented approximately perpendicular to the upper wall, the second planar portion facing the first planar portion;

a first rib offset member extending in a first lateral direction from the first sidewall to a first free end;

a second rib offset member extending in a second lateral direction from the second sidewall to a second free end;

a first leg extending from the first sidewall, wherein the first leg is oriented at an oblique angle to the upper wall; and

a second leg extending from the second sidewall, wherein the second leg is oriented at an oblique angle to the upper wall, and wherein the first and second legs extend away from each other to define a rib receptacle adapted to receive the trapezoidal rib.

2. The mounting bracket of claim 1 , wherein the first planar portion of the first sidewall is oriented approximately perpendicular to a top surface of the first rib offset member.

3. The mounting bracket of claim 1 , wherein a minimum interior width of the rib receptacle measured in the lateral direction is about equal to the first width of the upper wall.

4. The mounting bracket of claim 1 , wherein a minimum distance between the first and second interior surfaces is less than a minimum interior width of the rib receptacle.

5. The mounting bracket of claim 1 , wherein the first planar portion of the first sidewall has a first height measured in the vertical direction, and wherein the first free end of the first rib offset member is separated from the second free end of the second rib offset member by a first distance that is less than the first height.

6. The mounting bracket of claim 1 , further comprising:

a first aperture extending through the first leg such that a first fastener can extend through a first rib sidewall of the trapezoidal rib and terminate within the trapezoidal rib when the mounting bracket is secured to the trapezoidal rib; and

a second aperture extending through the second leg such that a second fastener can extend through a second rib sidewall of the trapezoidal rib and terminate within the trapezoidal rib when the mounting bracket is secured to the trapezoidal rib.

7. The mounting bracket of claim 6 , further comprising:

a first gasket positioned adjacent to an interior surface of the first leg, wherein the first gasket covers the first aperture.

8. The mounting bracket of claim 1 , further comprising:

a first protuberance extending in the first lateral direction from the first interior surface of the first sidewall; and

a second protuberance extending in the second lateral direction from the second interior surface of the second sidewall, wherein the second protuberance extends toward the first protuberance.

9. The mounting bracket of claim 8 , wherein a receptacle between a lower surface of the upper wall and the first and second protuberances is configured to receive a nut to engage a threaded fastener extendable through the mounting aperture.

10. The mounting bracket of claim 1 , wherein the mounting aperture is extended in a longitudinal direction to define a mounting slot.

11. The mounting bracket of claim 1 , wherein the first leg extends linearly from the first sidewall to a first leg end.

12. The mounting bracket of claim 11 , wherein the first and second legs are oriented as a mirror image of one another.

13. The mounting bracket of claim 1 , wherein the first and second legs are flexibly deflectable, and wherein from a first position the first leg is flexibly deflectable at least 2° relative to the second leg.

14. The mounting bracket of claim 13 , wherein the mounting bracket is of one-piece construction.

15. A mounting bracket adapted to be secured to a trapezoidal rib of a building surface, comprising:

an upper wall with a first side, a second side, and a first width measured in a lateral direction between the first and second sides;

an aperture extending through the upper wall;

a first sidewall extending from the upper wall;

a first rib offset member extending from the first sidewall to a first free end;

a second sidewall extending from the upper wall;

a second rib offset member extending from the second sidewall to a second free end, the first free end spaced from the second free end by a first distance that is less than the first width;

a first leg extending from the first sidewall; and

a second leg extending from the second sidewall, the first and second legs extending away from each other to define a rib receptacle adapted to receive the trapezoidal rib.

16. The mounting bracket of claim 15 , wherein the first sidewall comprises a first planar surface oriented approximately perpendicular to the upper wall, and the second sidewall comprises a second planar surface oriented approximately perpendicular to the upper wall.

17. The mounting bracket of claim 15 , wherein the first leg is flexibly deflectable relative to the upper wall.

18. The mounting bracket of claim 15 , wherein the upper wall has a maximum thickness and the first sidewall has a first thickness that is less than the maximum thickness.

19. The mounting bracket of claim 18 , wherein the first leg has a second thickness that is about equal to the first thickness of the first sidewall.

20. The mounting bracket of claim 15 , wherein a minimum distance between interior surfaces of the first and second sidewalls is greater than the first distance separating the first and second free ends.