Joist Design Properties – US

 

P3 Joist Section Properties and Allowable Capacities
Series Depth EI2  (106 lbf-in.2) Mr3 (lbf-ft) Vr4 (lbf) K5 (106 lbf) Self Weight (plf) Allowable Verticle
Load (lbf/ft)
PJI 40 9-1/2  193  2,735  1,120 4.94 2.6 2,000
11-7/8  330 3,545 1,420 6.18  2.9  2,000
 14 482 4,270 1,710  7.28  3.1  2,000
 16 657  4,950  1,970  8.32  3.4  2,000
PJI 60  9-1/2 231 3,780  1,120 4.94  2.6  2,000
 11-7/8  396 4,900 1,420 6.18  2.9 2,000
 14 584 5,895 1,710  7.28 3.1 2,000
 16 799  6,835  1,970  8.32 3.4 2,000
PJI 80  11-7/8  547  6,940  1,420  6.18 3.6  2,000
 14  802  8,360  1,710  7.28 3.8 2,000
16  1,092 9,690  1,970  8.32 4.0  2,000
18  1,413  11,000  2,450  9.36  4.3 2,000
 20  1,790 12,180  2,530  10.4 4.5 1,720
22  2,214  13,340  2,615  11.44  4.7 1,440
 24  2,687  14,490  2,695  12.48 4 .9 1,390
 PJI 90  11-7/8  601 8,515  1,420 6.18 3.6 2,000
 14  877  10,255  1,710 7.28  3.8 2,000
 16  1,187  11,895 1,970 8.32  4.0  2,000
 18  1,546 13,445  2,450 9.36  4.3  2,000
20  1,957 14,885  2,530  10.4 4.5  1,720
22  2,419 16,305  2,615  11.44 4.7  1,440
24  2,934 17,710  2,695  12.48 4.9  1,390

NOTES:

  1. The tabulated values are design values for standard duration of load. All values, except EI and K, shall be permitted to be adjusted for other load durations as permitted by the code.
  2. Bending stiffness (EI) of the P3 Joist
  3. Moment capacity of the P3 Joist which shall not be increased by any code allowed repetitive member use factor.
  4. Shear capacity (V) of the P3 Joist
  5. Coefficient of shear deflection (K) of the P3 Joist (For calculating uniform load and center-point load deflections of the P3 Joist in a simple-span application see the full US P3 Joist User Guide.