| 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. |
