What clearance is needed from the end to the floor joist? I see 150mm on the plan but is more needed due to the trap?
Distance from the shower tray's top edge to the top edge of the drain is 150 mm and 192 mm to the centre of the waste trap.
You will need approximately 65 mm of height below the shower tray, it's diameter is approximately 8 cm. It is completely rotatable and it's pipe can be adjusted.
If you have any questions I will be happy to help.
David 020 7193 0953