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- 4 Mar 2022
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Hi,
I am in the middle of a bathroom refit where we want to put wall mounted taps for the bath and basin. The joists are running parallel to walls where the basin and bath is situated. To facilitate altering the pipework so the pipes can run inside the walls I need to notch the joist closest to the wall on both sides (bath and basin on opposite walls). For the basin side, it's not a problem as the notching location is within the first 25% of the joist and past the first 7% from the support wall. On the bath side, the location is around 40% along a 3.6m span, which is outside of the safe zone. But my joists are well over spec for this span because of much greater spans elsewhere in the house (210x72 @ 400mm centres). Looking at the span tables, for a 3.6m span with 72mm widths, I would need 145mm height joist at a minimum.
With all this in mind, if I was to notch 20mm depth to allow the 15mm pipe to travel into the wall, would this still be safe, as the overall height of the joist would still fall well above the span tables in the notched area?
Thanks
I am in the middle of a bathroom refit where we want to put wall mounted taps for the bath and basin. The joists are running parallel to walls where the basin and bath is situated. To facilitate altering the pipework so the pipes can run inside the walls I need to notch the joist closest to the wall on both sides (bath and basin on opposite walls). For the basin side, it's not a problem as the notching location is within the first 25% of the joist and past the first 7% from the support wall. On the bath side, the location is around 40% along a 3.6m span, which is outside of the safe zone. But my joists are well over spec for this span because of much greater spans elsewhere in the house (210x72 @ 400mm centres). Looking at the span tables, for a 3.6m span with 72mm widths, I would need 145mm height joist at a minimum.
With all this in mind, if I was to notch 20mm depth to allow the 15mm pipe to travel into the wall, would this still be safe, as the overall height of the joist would still fall well above the span tables in the notched area?
Thanks