Joist

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.