MECHANICAL RECTANGLES
ASTM A513 and ASTM A500 Grade B or C

SIZE	GAUGES
1-1/2″ x 3/4″	18	16	15	14	13	12	11	10
1-1/2″ x 1″	18	16	15	14	13	12	11	10
2″ x 1″	18	16	15	14	13	12	11	10	9	8
2″ x 1-1/2″	18	16	15	14	13	12	11	10	9	8
2-1/2″ x 1″	18	16	15	14	13	12	11	10	9	8
2-1/2″ x 1-1/2″	18	16	15	14	13	12	11	10	9	8
3″ x 1″	18	16	15	14	13	12	11	10	9	8
3″ x 1-1/2″		16	15	14	13	12	11	10	9	8
3″ x 2″		16	15	14	13	12	11	10	9	8
3-1/2″ x 2-1/2″			15	14	13	12	11	10	9	8
4″ x 1-1/2″			15	14	13	12	11	10
4″ x 2″			15	14	13	12	11	10	9	8

 

STRUCTURAL RECTANGLES
ASTM A513 and ASTM A500 Grade B or C

SIZE	WALLS
2″ x 1-1/2″	1/8	3/16	1/4
3″ x 1.5″	1/8	3/16	1/4	5/16
3″ x 2″	1/8	3/16	1/4	5/16
3.5″ x 1.5″	1/8	3/16	1/4	5/16
4″ x 2″	1/8	3/16	1/4	5/16
4″ x 3″	1/8	3/16	1/4	5/16	3/8
5″ x 2″	1/8	3/16	1/4	5/16
5″ x 3″	1/8	3/16	1/4	5/16	3/8
6″ x 2″	1/8	3/16	1/4	5/16	3/8
5″ x 4″	1/8	3/16	1/4	5/16	3/8
6″ x 3″	1/8	3/16	1/4	5/16	3/8
7″ x 2″	1/8	3/16	1/4	5/16
6″ x 4″	1/8	3/16	1/4	5/16	3/8	1/2
7″ x 3″	1/8	3/16	1/4	5/16	3/8
8″ x 2″	1/8	3/16	1/4	5/16	3/8
6″ x 5″	1/8	3/16	1/4	5/16	3/8
7″ x 4″	1/8	3/16	1/4	5/16	3/8
8″ x 3″	1/8	3/16	1/4	5/16	3/8
7″ x 5″	1/8	3/16	1/4	5/16	3/8	1/2
8″ x 4″	1/8	3/16	1/4	5/16	3/8	1/2
10″ x 2″		3/16	1/4	5/16
8″ x 6″	1/8	3/16	1/4	5/16	3/8	1/2	5/8
9″ x 5″		3/16	1/4	5/16	3/8	1/2	5/8
10″ x 4″		3/16	1/4	5/16	3/8	1/2
12″ x 2″		3/16	1/4
9″ x 7″		3/16	1/4	5/16	3/8	1/2	5/8
10″ x 6″		3/16	1/4	5/16	3/8	1/2	5/8
12″ x 4″		3/16	1/4	5/16	3/8	1/2
10″ x 8″		3/16	1/4	5/16	3/8	1/2	5/8
12″ x 6″		3/16	1/4	5/16	3/8	1/2	5/8
14″ x 4″			1/4	5/16	3/8	1/2	5/8
12″ x 8″			1/4	5/16	3/8	1/2	5/8
14″ x 6″			1/4	5/16	3/8	1/2	5/8
16″ x 4″			1/4	5/16	3/8	1/2	5/8
14″ x 10″			1/4	5/16	3/8	1/2	5/8
16″ x 8″			1/4	5/16	3/8	1/2	5/8