SERVICE HOLE LOCATION <TITLE GUIDE 1> SJI <TITLE 300x45 2>
SPECJO ST DO NOT CUT / DRILL HOLES IN THESE LOCATIONS
150mm
150mm
150mm 150mm
150mm
150mm
End Support
150mm
150mm
Intermediate Support
Exclusion Zone
Cantilever Support
x = Larger of Joist Height / 2 or 150mm
do not cut holes too close to supports
do not over cut holes
do not punch holes with hammer
do not cut or drill holes in flanges
ACCEPTABLE HOLE LOCATIONS 50mm or less holes in any location outside exclusion zones minimum of 300mm from supports 100mm from any other hole
100mm
A
h
B
h
B
Consider clusters of holes as a single larger hole
h
B
h
A
A = Distance from a support to a Hole B = Distance from a hole to another hole Distance
Minimum distance to the hole is the greater of
A
Length Shown on Table for the hole size required
B
Length Shown on Table for largest of the 2 adjacent holes
75mm 115mm 160mm
Biggest Hole Width / Diameter x2
Notes: 1. Tables shown are for Residential Live Load (1.5 kPa) + 110kg/m2 Dead Load
Circular Holes Hole Diameter (mm)
or
Joist Span (m) 3.0
3.6
4.2
4.8
5.4
6.0
2.
300 300 900
300 400 1300
300 800 1700
300 1100 2100
700 1500 2400
1100 1900 2800
There is no maximum number of holes that can be cut into the joists provided they meet the above requirements
3.
Contact ITI for further design assistance is required
4.
Cut holes carefully. Do not over cut holes
5.
Do not cut the flanges of the I-Joists
6.
Holes may be located within the full depth of the web provided there is a minimum of a 5mm gap from the bottom of the hole to the flange
7.
No holes are to be cut into a cantilever
Rectangular Holes Hole Size (mm)
Joist Span (m)
Height
Width
3.0
3.6
4.2
4.8
5.4
6.0
200
225
1100
1400
1800
2200
2600
2900
More Information: ITI Spec Joist (SJI) I-Joist Product Specification Guide
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