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Apr 29
th
, 2024, 7:16am
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Quote:
If there is a 50-50 chance of getting something right, there is a 90% chance you will get it wrong.
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joist---Drilling & Notching (Read 1991 times)
nyck
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joist---Drilling & Notching
Nov 24
th
, 2004, 3:23pm
What are the rules/guidelines for drilling + notching out joists.
The joist are 175mm/7" & 2900mm long
Notch
15mm copper flow+return
drill
15mm speedfit flow/return
2x 2.5mm cable
1x 1.5mm cable
I havent decide if to use plastic or copper thats why i've asked for both.
When notching is it best to1 larger notch for the flow/return or 2 seperated notches ,same goes for the cable1 larger hole or 3 seperated holes
thanks nyck
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jasonB
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Re: joist---Drilling & Notching
Reply #1 -
Nov 24
th
, 2004, 4:50pm
It is best to place the holes in the middle third of the joist as this will have the least affect on its strength, notching the joists will slightly affect their strength as they will effectively be about 158mm not 175mm
Usually run both copper pipes in the same notch. If you have traditional floor boards put the notch along the center of a board to allow for refixing either side. If running hot & cold feed you may want to use separate notches as the hot pipe will warm the cold water in the adjacent pipe.
Jason
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Last Edit: Nov 24
th
, 2004, 4:53pm by jasonB
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JerryD
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Re: joist---Drilling & Notching
Reply #2 -
Nov 24
th
, 2004, 5:16pm
and it's best to notch/drill near the ends of the joists, preferably within about 450mm from one end where it sits in the wall. This has least effect on the joist strength.
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