Technical Specifications

P. 5
Maximum Allowable Spans
The specific PJI designation needed for your application is easily determined by selecting the span needed and
then by choosing the PJI that meets your span, spacing, and uniform loading criteria�
Tables1 and 1a are for simple or multiple span applications respectively� The use of these tables will provide
maximum spansfor the indicated spacing and span conditions�
To illustrate the selection of a P3 Joist product, assume a design simple span of 16’-1”� For architectural reasons
limit the joist depth to 11-7/8” and joist spacing to 19�2” on center� From the 9-1/2” and 11-7/8” entries in Table1,
look down the 19�2” o�c� spacing column� For depths of 9-1/2”, select 9-1/2” PJI 60, and from the 11-7/8” depths,
notice that any joist designation willwork�
The allowable spans in the tables in this user guide indicate the allowable clear span for various joist spacings
under typical residential uniform floor loads (40psf live load and 10psf dead load) for glued-nailedsystems�
In addition, floor sheathing must be field glued to the P3 Joist flanges using approved construction adhesives
in order to achieve the P3 Joist allowable spans�
Use of these span tables is limited to uniform loadconditions, and P3 floor Joist spans shall not exceed these
allowable spans� P3 Joist can be used for other applications such as roofs and ceilings to support line loads or
concentrated loads, etc�, when properly engineered, using the appropriate design properties in Tables 19 and20�
Allowable Floor Spans
NOTES
1� Allowable clear span is applicable to
simple-span or multiple-span residential
floor construction with a design dead
load of 10 psf and a live load of 40 psf�
The live load deflection is limited to
L/480� (L = span length in inches)� Spans
are based on duration factor (LDF) of 1�0�
2� Spans are based on a composite floor
with glue-nailed sheathing meeting the
requirements for APA Rated Sheathing
STURD-I-FLOOR conforming to PS1 or
PS2 with a minimum thickness of 19/32”
(40/20 or 20 o�c�) for a joist spacing of
19�2” or less or with a minimum thickness
of 23/32” (48/24 or 24 o�c�) for a joist
spacing of 24” when floor sheathing is
nailed only� Adhesive shall meet APA
Specification AFG-01 or ASTM D3498�
Spans shall be reduced to 12” when floor
sheathing is nailed only�
3� Minimum bearing length shall be 1-3/4”
for the end bearings and 3-1/2” for the
intermediate bearings�
4� Bearing or web stiffeners are required
for all PJI Joist in the span tables if over
16” deep�
TABLE 1
–
LDF = 1.0
Allowable Spans for P3 Floor Joist
Simple span only – Glued subfloor* – On center spacing
TABLE 1 A
–
LDF = 1.0
Allowable Spans for P3 Floor Joist
Multiple span only – Glued subfloor* – On center spacing
*For other type floor assemblies, please contact EACOM at www�eacom�ca�
SI: 1 inch = 25�4 mm, 1 foot = 304�8 mm, 1 psf = 47�88 Pa
Maximum floor span (ft) Glued subfloor
Load
Series
Depth
(in)
On center joist spacing (in)
Live Dead 12 16 19�2 24
40 10
PJI 40
9-1/2 18’-0” 16’-5” 15’-6” 14’-6”
11-7/8 21’-5” 19’-7” 18’-6” 16’-8”
14 24’-4” 22’-3” 20’-6” 18’-4”
16 26’11” 24’-3” 22’-1” 19’-9”
PJI 60
9-1/2 18’-11” 17’-4” 16’-4” 15’-3”
11-7/8 22’-7” 20’-8” 19’-6” 18’-2”
14 25’-9” 23’-6” 22’-2” 20’-8”
16 28’-6” 26’-0” 24’-7” 22’-10”
PJI 80
11-7/8 24’-11” 22’-8” 21’-4” 19’-10”
14 28’-3” 25’-9” 24’-3” 22’-7”
16 31’-4” 28’-6” 26’-10” 25’-0”
18 34’-2” 31’-1” 29’-3” 27’-3”
20 36’-11” 33’-8” 31’-8” 29’-6”
22 39’-8” 36’-1” 34’-0” 31’-8”
24 42’-4” 38’-6” 36’-4” 33’-9”
PJI 90
11-7/8 25’-7” 23’-3” 21’-11” 20’-5”
14 29’-0” 26’-5” 24’-11” 23’-2”
16 32’-1” 29’-3” 27’-6” 25’-5”
18 35’-1” 31’11” 30’-1” 27’-11”
20 37’-11” 34’-6” 32’-6” 30’-3”
22 40’-9” 37’-7” 34’-11” 32’-6”
24 43’-5” 39’-6” 37’-3” 34’-8”
Maximum floor span (ft) Glued subfloor
Load
Series
Depth
(in)
On center joist spacing (in)
Live Dead 12 16 19�2 24
40 10
PJI 40
9-1/2 19’-7” 17’-11” 16’-4” 14’-7”
11-7/8 23’-5” 20-5” 18’-7” 16’-7”
14 25’-11” 22’-5” 20’-5” 18’-3”
16 27’11” 24’-2” 22’-0” 19’-8”
PJI 60
9-1/2 20’-8” 18’-10” 17’-9” 16’-6”
11-7/8 24’-8” 22’-6” 21’-2” 19’-7”
14 28’-0” 25’-7” 24’-1” 19’-9”
16 31’-1” 28’-4” 24’-9” 19’-9”
PJI 80
11-7/8 27’-1” 24’-8” 23’-3” 21’-7”
14 30’-10” 28’-0” 26’-5” 23’-11”
16 34’-2” 31’-1” 29’-3” 23’-11”
18 37’-3” 33’-10” 31’-11” 29’-5”
20 40’-3” 36’-8” 34’-6” 31’-0”
22 43’-3” 39’-4” 36’-4” 31’-5”
24 46’-2” 41’-6” 37’-10” 31’-5”
PJI 90
11-7/8 27’-11” 25’-4” 23’-10” 21’-10”
14 31’-8” 28’-9” 27’-1” 23’-11”
16 35’-0” 31’-10” 29’-11” 25’-11”
18 38’-3” 34’9” 32’-9” 30’-5”
20 41’-5” 37’-8” 35’-5” 31’-5”
22 44’-5” 40’-5” 38’-0” 31’-5”
24 47’-5” 43’-1” 39’-3” 31’-5”