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  APA - The Engineered Wood Association   APA Residential & Commercial  

APA Residential & Commercial - Page 22

   

APA Residential & Commercial

TABLE 7
ALLOWABLE SPANS FOR APA PERFORMANCE RATED I-JOISTS-SIMPLE-AND MULTIPLE-SPAN APPLICATIONS, 40 PSF LIVE LOAD AND 10 PSF DEAD LOAD
APA PRI™   Floor I-Joist Spacing (o.c.)
  12 in. 16 in. 19.2 in 24 in
I x 10-C4 (PRI-15) 17 ft 0 in. 15 ft 6 in. 14 ft 8 in. 13 ft 2 in
I x 10-C6 (PRI-25) 17 ft 9 in 16 ft 2 in 15 ft 3 in 14 ft 0 in
I x 12-C10 (PRI-15) 20 ft 3 in. 18 ft 5 in. 17 ft 5 in. 15 ft 1 in
I x 12-C12 (PRI-25) 21 ft 1 in. 19 ft 3 in. 18 ft 2 in. 16 ft 1 in
I x 14-C14 (PRI-25) 24 ft 0 in. 21 ft 10 in. 20 ft 2 in. 16 ft 5 in
I x 14-C16 (PRI-35) 25ft11in. 23 ft 7 in. 22 ft 21 in. 18 ft 1 in
I x16 -C18 (PRI-25) 26 ft7 in. 24 ft 3 in. 20 ft 2 in. 16 ft 5 in
I x 16-C20 (PRI-35) 28 ft8 in. 26 ft 1 in. 23 ft 1 in. 18 ft 2 in
I x 10- S2 (PRI-30) 18ft 0in. 16 ft 2 in. 14 ft 9 in. 13 ft 4 in
I x 10-S4 (PRI-32) 19 ft 0 in. 17 ft 4 in. 16 ft 4 in. 15 ft 3 in
I x 12-S6 (PRI-30) 21 ft 6 in. 18 ft 9 in. 17 ft 1 in. 15 ft 3 in
I x 12-S8 (PRI-32) 22 ft8 in. 20 ft 8 in. 19 ft 6 in. 18 ft 11 in
I x 12-S10 (PRI-30) 24 ft 11 in. 22 ft 8 in. 21 ft 4 in. 19 ft 9 in
I x 14-S12 (PRI-32) 25 ft 9 in. 23 ft 6 in. 22 ft 2 in. 19 ft 8 in
I x 14-S14 (PRI-42) 28 ft 3 in. 25 ft 9 in. 24 ft 3 in. 22 ft 9 in
I  x 16-S16 (PRI-32) 28 ft 7 in. 26 ft 1 in. 24 ft 7 in. 19 ft 11 in
I x 16-S18 (PRI-42) 31 ft 4 in. 28 ft 6 in. 26 ft 11 in. 23 ft 11 in

Notes:

1. This span chart is based on uniform loads. For applications with other than uniformly distributed loads, an engineering analysis may be required based on the use of the design properties in APA Product Guide: I-Joist for Residential Floors, form X710.

2. Allowable clear span is applicable to simple- or multiple-span residential floor construction. For I-Joist with simple spans only or multiple-span only, or multiple-span conditions only, refer to APA Product Guide: I-Joist for Residential floors, Form X710.

3. This span chart is for applications with a design live load of 40 psf and a design dead load of 10 psf.

4. Deflection under live load is limited to L/480.

5. Maximum spans shown are clear distances between supports. Minimum bearing length shall be 1-3/4 inches for end bearing's and 3-1/2 inches for intermediate bearings.

6. For multiple-span applications using this table, the end spans shall be 40% or more of the adjacent span.

7. Spans are based on a composite floor with glued-nailed sheathing meeting the requirements for APA Rated Sheathing or APA Rated STURD-I-FLOOR conforming to PRP-108, PS 1 or PS 2 with a minimum thickness of 19/32 inch (40/20 or 20 oc) for a joist spacing of 19.2 inches or less, or 23/32 (48/24 or 24 oc) for a joist spacing of 24 inches. Adhesive shall meet APA Specification AFG-01. Spans shall be reduced 12 inches when the floor sheathing is nailed only.

8. Web stiffeners are not required when PRIs are used with the spans and spacing given in this table, with some exceptions for hangers or cantilevers (see APA Product Guide: I-Joist for residential Floors, Form X710).

9. Those products most commonly available for each depth and flange type are shaded. Check for availability.



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