Technical Specifications

P. 18
TABLE 9
Location Of Circular Holes In P3 Joist Webs
Simple or Multiple Span for Dead Loads up to 10 psf and Live Loads up to 40 psf
1,2,3,4
Cutting the 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�
Joist
Depth
Joist
Minimum distance from inside face of any support to center of hole (ft-in�)
Round Hole Diameter (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
9-1/2”
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’-11”
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
Table 9 is based on the P3 Joists being used at their maximum span� If the P3Joists
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
x D
SAF
Where: D
reduced
= Distance from the inside face of any support to center of hole is
reduced for less-than-maximum span applications (ft)� The reduced
distance shall not be less than 6” from the face of support to edge
of the hole�
L
actual
= The actual measured span distance between the inside faces of
supports (ft)
SAF = Span Adjustment Factor is given in the table above�
D = The minimum distance from the inside face of any support to
center of hole from Table 9 above
If L
actual
is greater than 1, use 1 in the above calculation for L
actual
�
SAF SAF
P3 Joist Typical Holes
FIGURE 6
See rule 11�Minimum distance from face of support
to the center of hole (See Table 9)
3/4x
diameter
2x diameter
of larger hole