Length of bearing in feet.

Breadth, 1 1/4 in.

Brendth,

1 3/4 in.

Breadth, 2 in.

Breadth, 2 1/2 in.

Breadth, 2 1/4 in.

Breadth, 2 3/4 in.

Breadth.

3 in.

Breadth,

31/4 in.

Breadth, 3 3/4 in.

Breadth, 4 in.

depth, inches.

depth, inches.

depth, inches.

depth, inches.

depth, inches.

depth, inches.

depth, inches.

depth, inches.

depth, inches.

depth, inches.

5

5 3/4

5 1/2

5 1/4

5

4 3/4

4 1/2

4 3/5

4 1/4

4 1/8

4

6

6 1/4

6

5 3/4

5 1/2

5 3/6

5 1/4

5

4 1/2

4 3/4

4 1/2

7

7

6 3/4

6 1/2

6 1/4

6

5 3/4

5 1/2

5 3/4

5 1/4

5

8

7 3/4

7 1/2

7

6 3/4

6 1/2

6 3/6

6 1/4

6

5 7/8

5 3/4

9

8 1/2

7 7/8

7 1/2

7

6 7/6

6 3/4

6 1/2

6 1/4

6

5 7/8

10

9

8 1/2

8

7 3/4

7 1/2

7 1/4

7

6 7/8

6 3/4

6 1/2

11

9 1/2

9

8 3/4

8 1/2

8

7 3/4

7 1/2

7 1/4

7

6 3/4

12

10

9 3/4

9 1/2

9

8 1/2

8 1/4

8

7 3/4

7 1/2

7 1/4

13

10 3/4

10 1/4

9 3/4

9 1/2

9

8 3/4

8 1/2

8 1/4

8

7 3/4

14

11

10 1/2

10

9 3/4

9 1/2

9 1/4

9

8 3/4

8 1/2

8

15

11 1/2

11

10 1/2

10

9 3/4

9 1/2

9 1/4

9

8 3/4

8 1/2

16

12 1/4

11 1/2

11

10 3/4

10 1/2

10

9 3/4

9 1/2

9 1/4

8 1/8

17

12 3/4

12

11 1/2

11 1/4

10 3/4

10 1/2

10 1/4

10

9 3/4

9 1/4

18

13 1/4

12 1/2

12

11 1/2

11 1/4

10 3/4

10 1/2

10 1/4

10

9 1/2

19

13 3/4

13

12 1/2

12

11 1/2

11 1/4

10 3/4

10 1/2

10 1/4

10

20

14 1/4

13 1/2

13

12 1/2

12

11 1/2

11 1/4

11

10 3/4

10 1/4

21

14 3/4

14

13 1/2

122

12 1/2

12

11 3/4

11 1/2

11

10 3/4

22

15

14 1/2

13 3/4

13 1/4

12 3/4

12 1/2

12

112

11 1/2

11

23

15 1/2

142

14

13 3/4

13

12 3/4

12 1/4

12

11 3/4

11 1/4

24

16

15 1/4

14 1/2

14

13 1/2

13 1/4

12 3/4

12 1/2

12

11 3/4

25

16 1/2

15 1/2

15

14 1/2

14

13 1/2

13

12 3/4

12 1/2

12

Example. - For a 14 feet bearing, a joist 10 by 2 is of the same degree of stiffness as one 9 by 3, or as one of any other depth opposite 14, with the breadth at the top of the column.

This Table was calculated by the equation (l2/b)1/2x2.2=d. See

Art.195.