FIG. 1 is a top, side, rear elevational view of a joist showing our design therefor;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof;
FIG. 8 is a sectional view taken along line 8-8 of FIG. 2;
FIG. 9 is sectional view taken along line 9-9 of FIG. 2;
FIG. 10 is a top, side, rear perspective view of a second embodiment of the joist;
FIG. 11 is a rear elevational view thereof;
FIG. 12 is a front elevational view thereof;
FIG. 13 is a left side elevational view thereof;
FIG. 14 is a right side elevational view thereof;
FIG. 15 is a top plan view thereof;
FIG. 16 is a bottom plan view thereof;
FIG. 17 is a sectional view taken along line 17-17 of FIG. 11; and,
FIG. 18 is a sectional view taken along line 18-18 of FIG. 11.
The drawings contain a symbolic break. The dash-dash broken lines shown in the drawings are for illustrating the symbolic break only. The portion between the break lines forms no part of the claimed design. The three-dimensional features on the right and left sides of the joist repeat consistently and at regular intervals throughout the length thereof.