SWI - T Series Joists

Maximum Simple Floor Spans

40 psf Live Load / 10 psf Dead Load

SWI-24

SWI-34

SWI-44

O.C. Spacing

9-1/2"

11-1/4"

11-7/8"

14"

9-1/2"

11-1/4"

11-7/8"

14"

16"

18"

20"

LL Defl. L/360

12"

16'-10"

19'-8"

20'-6"

23'-2"

19'-6"

22'-10"

23'-9"

27'-0"

29'-10"

35'-8"

38'-7"

16"

15'-2"

17'-9"

18'-6"

20'-6"

17'-7"

20'-7"

21'-6"

24'-5"

27'-0"

32'-3"

34'-11"

19.2"

14'-3"

16'-3"

16'-10"

18'-8"

16'-6"

19'-4"

20'-2"

22'-11"

25'-4"

30'-3"

32'-9"

24"

12'-9"

14'-7"

15'-0"

16'-8"

15'-2"

17'-10"

18'-7"

21'-2"

21'-9"

28'-0"

30'-3"

LL Defl. L/480

12"

15'-2"

17'-9"

18'-6"

21'-0"

17'-7"

20'-7"

21'-6"

24'-5"

27'-0"

32'-3"

34'-11"

16"

13'-8"

16'-1"

16'-8"

18'-11"

15'-10"

18'-7"

19'-5"

22'-0"

24'-5"

29'-2"

31'-6"

19.2"

12'-10"

15'-1"

15'-8"

17'-9"

14'-10"

17'-5"

18'-2"

20'-8"

22'-10"

27'-4"

29'-7"

24"

11'-10"

13'-11"

14'-5"

16'-5"

13'-8"

16'-1"

16'-9"

19'-1"

21'-1"

25'-3"

27'-31"

SWI - T Series Joists

Maximum Multiple Floor Spans

40 psf Live Load / 10 psf Dead Load

		SWI-24				SWI-34
	O.C. Spacing	9-1/2"	11-1/4"	11-7/8"	14"	9-1/2"	11-1/4"	11-7/8"	14"	16"
LL Defl. L/480	12"	16'-10"	19'-8"	20'-6"	23'-2"	19'-6"	22'-10"	23'-9"	27'-0"	29'-10"
	16"	15'-2"	17'-9"	18'-6"	20'-6"	17'-7"	20'-7"	21'-6"	24'-5"	27'-0"
	19.2"	14'-3"	16'-3"	16'-10"	18'-8"	16'-6"	19'-4"	20'-2"	22'-11"	25'-4"
	24"	12'-9"	14'-7"	15'-0"	16'-8"	15'-2"	17'-10"	18'-7"	21'-2"	21'-9"

NOTES:

1. Shorter span must measure at least 50% of longest span. Otherwise use simple span chart.
2. Minimum end bearing 24 Series - 2", 34 and 44 Series - 2-1/2" (3-1/2" minimum intermediate bearing).
3. L/360 deflection is minimum by Code, L/480 is recommended for a stiffer floor system.
4. Span charts are based on composite action (glued and nailed ¾" sheathing).
5. For loading conditions not shown, contact Superior Wood Systems

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