P3 Joist Typical Holes – US

P3 Joist Typical Holes Figure 6

Cutting Holes

  • Never drill, cut, or notch the flange. Never over-cut the web.
  • Holes in webs should be cut with a sharp saw.
  • For rectangular holes avoid over cutting the corners as this can cause unnecessary stress concentrations. Slightly rounding the corners is recommended. Starting the rectangular hole by drilling a 1” diameter hole in each of the 4 corners and then making the cuts between the holes is another good method to minimize damage to I-Joist.
Location of Circular Holes in P3 Joist Webs

Simple of Multiple Span for Dead Loads up to 10 psf and Live Loads up to psf1,2,3,4

Joist Depth Joist Minumum distance from inside face of any support center of hole [ft-in]
SAF(5)  2″  3″  4″  5″ 6″ 6-1/4″  7″  8″  8-5/8″  9″  10″ 10-3/4″  11″  12″ 12-3/4″
 9-12″  PJI 40 14′-6″ 0′-7″  1′-8″  3′-0″ 4′-4″ 5′-9″  6′-3″  2  N  1  2  X
 PJI 60 15′-3″  1′-8″  3′-0″  4′-4″  5′-8″  7′-3″  7′-8″  2  N  1  2  X
 11-7/8″  PJI 40  16′-7″ 0′-7″  0′-8″  1′-2″ 2′-5″ 3′-9″ 4′-1″  5′-1″  6′-8″  7′-11″  1 2
  PJI 60 18′-2″  0′-8″  1′-10″  3′-2″  4′-5″  5′-10″  6′-2″  7′-4″  8′-11″  10′-0″  1  2
  PJI 80 19′-10″  1′-11″  3′-2″  4′-6″  5′-10″  7′-3″  7′-8″  8′-10″  10′-6″  11′-7″  1  2
  PJI 90 20′-5″  2′-1″  3′-4″  4′-8″  6′-0″  7′-6″  7′-10″  9′-0″  10′-8″  11′-11″  1  2
14″   PJI 40 18′-3″  0′-7″  0′-8″  0′-8″  0′-9″  1′-10″  2′-2″ 3′-2″  4′-7″ 5′-5″  6′-0″  7′-7″  9′-4″
  PJI 60 19′-9″ 0′-7″   0′-8″  0′-8″  1′-7″  3′-2″  3′-6″  4′-9″  6′-6″  7′-8″  8′-4″  10′-4″  11′-1″
  PJI 80  22′-7″  0′-7″  1′-9″ 3′-0″  4′-4″  5′-8″  6′-1″  7′-1″  8′-7″  9′-7″  10′-3″ 12′-2″  13′-10″
  PJI 90 23′-2″  0′-7″ 1′-9″  3′-0″  4′-4″  5′-8″  6′-1″  7′-1″ 8′-8″  9′-10″  10′-7″  12′-8″  14′-4″
16″   PJI 40 19′-8″  0′-7″   0′-8″  0′-8″  0′-9″  0′-9″  0′-10″  1′-5″  2′-9″  3′-7″ 4′-1″ 5′-6″ 6′-7″  7′-0″  8′-9″  10′-9″
  PJI 60 19′-9″  0′-7″   0′-8″  0′-8″  0′-9″  0′-9″  0′-10″  1′-10″  3′-6″  4′-6″  5′-2″  7′-3″  8′-11″  9′-6″  11′-10″  13′-9″
  PJI 80 23′-11″  0′-7″   0′-8″   0′-8″  1′-7″  3′-2″  3′-7″  4′-10″  6′-6″  7′-7″  8′-3″  10′-2″  11′-8″  12′-2″  14′-3″  16′-0″
  PJI 90 25′-5″ 0′-7″   0′-8″  1′-8″ 2′-11″  4′-3″  4′-7″  5′-7″  7′-0″  8′-1″  8′-9″  10′-8″ 12′-2″ 12′-8″ 14′-10″  16′-7″
18″  PJI 80 27′-3″  0′-7″   0′-8″  0′-8″  0′-11″  2′-3″  2′-8″  3′-9″  5′-2″ 6′-1″ 6′-8″  8′-3″  9′-6″  9′-11″  11′-8″  13′-0″
  PJI 90  27′-11″  0′-7″   0′-8″  0′-8″  1′-6″  2′-11″ 3′-4″  4′-5″  5′-10″  6′-10″  7′-5″  9′-0″  10′-3″  10′-8″  12′-5″ 13′-9″
 20″   PJI 80 29′-6″  0′-7″   0′-8″  0′-8″  0′-9″ 1′-9″  2′-1″ 3′-1″  4′-5″  5′-3″  5′-10″ 7′-3″  8′-4″  8′-8″  10′-3″  11′-5″
  PJI 90 30′-3″  0′-7″  0′-8″   0′-8″ 0′-10″  2′-2″  2′-6″  3′-6″  4′-10″  5′-8″ 6′-2″  7′-8″  8′-9″  9′-1″  10′-8″  11′-11″
22″   PJI 80 31′-5″  0′-7″  0′-8″  0′-8″  0′-9″  0′-9″  1′-1″  2′-0″ 3′-3″ 4′-0″  4′-6″  5′-9″  6′-9″  7′-1″ 8′-6″ 9′-9″
  PJI 90 31′-5″ 0′-7″   0′-8″  0′-8″   0′-9″  0′-10″ 1′-1″ 2′-0″  3′-3″  4′-2″  4′-9″  6′-4″ 7′-7″  8′-0″  9′-8″ 11′-0″
 24″   PJI 80 31′-5″  0′-7″  0′-8″   0′-8″   0′-9″  0′-9″  0′-10″  0′-10″  1′-11″  2′-7″  3′-1″  4′-4″  5′-5″  5′-10″ 7′-4″  8′-6″
  PJI 90 31′-5″ 0′-7″  0′-8″   0′-8″   0′-9″  0′-9″  0′-10″  0′-10″ 2′-4″  3′-2″  3′-9″  5′-3″  6′-4″ 6′-9″  8′-4″  9′-6″

NOTES:

  1. Above tables may be used for P3 Joist spacing of 24” on center or less.
  2. Hole location distance is measured from inside face of supports to center of hole.
  3. Distances in this chart are based on uniformly loaded joists.
  4. Hole sizes and/or locations that fall outside of the scope of this table may be acceptable based on analysis of actual hole size, span, spacing, and loading conditions.
  5. SAF stands for Span Adjustment Factor. SAF is used as defined below.

OPTIONAL
The above table is based on the P3 Joist being used at their maximum span. If the P3 Joist are placed at less than their full allowable span, the maximum distance from the centerline of the hole to the face of any support (D) as given above may be reduced as follows.

D reduced = L actual ÷ SAF x D