Retail Stores. Total load, 174 pounds per square foot.

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

2x14

12

18

2

19

7

22

3

23

6

2X14

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