FIG. 1 is a bottom view of a roof curb showing my new design;
FIG. 2 is a top view thereof;
FIG. 3 is a right side view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a front elevational view thereof;
FIG. 6 is a rear elevational view thereof;
FIG. 7 is a perspective view thereof, taken from the top, front, and right side;
FIG. 8 is a perspective view thereof, taken from the bottom, front and left side;
FIG. 9 is a perspective thereof, taken from the top, rear, and right side;
FIG. 10 is a cross sectional view taken in the direction of line 10-10 of FIG. 2;
FIG. 11 is a detailed enlarged bottom and right perspective view of area 11 circumscribed with FIG. 7; and,
FIG. 12 is a detailed enlarged bottom view of area 12 circumscribed with FIG. 1.
The broken line in FIG. 2 depicts the direction of the cross-section of FIG. 10 and forms no part of the claimed design. All other broken lines denote the boundaries of enlargement areas and form no part of the claimed design.