Installation Instructions

P. 3
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
of the user guide.
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, 1psf = 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”