Size of Joists.

Dist. on Centres.

White Pine.

Spruce or Norway Pine.

Oregon or Texas Pine.

Georgia Pine.

Ins.

Ft.

Ins.

Ft.

Ins.

Ft.

Ins.

Ft.

Ins.

3x8

12

11

6

12

5

14

1

14

9

3x8

16

9

11

10

2

12

2

12

9

2x10

12

11

8

12

8

14

5

15

1

2x10

16

10

2

10

11

12

5

13

1

3x10

12

14

4

15

6

17

7

18

7

3x10

16

12

5

13

5

15

2

16

0

2X12

12

14

1

15

2

17

2

18

2

2X12

16

12

2

13

1

14

11

15

8

Total load, 177 pounds per square foot.

3x12

12

17

2

18

5

20

11

22

1

3x12

16

14

10

16

0

18

2

19

1

2x14

12

16

3

17

7

19

11

21

1

2x14

16

14

2

15

2

17

3

18

2

2¼x14

12

18

2

19

7

22

3

23

6

2¼X14

16

15

9

17

0

19

3

20

4

3x14

12

19

11

21

6

24

5

25

8

3x14

16

17

3

18

7

21

2

22

3