Building a timber bath cradle:
Work out what thickness of material you will be using to close in the bath sides. Then according to this allowance place a 2-inch X 2-inch (50 mm X 50 mm) timber against the studs on the long side of the bath. Then place a shorter rail on the end of the top tap end of the bath. Then fit the bath and with the use of a spirit level measure down from the hanging corner and deducting 4-inches (100 mm) from this measurement cut this section by four pieces and cut the two long sides and nail this entire frame together. Then fit it under the bath exterior side and measure up for the remaining end of the bath section to be made.
If using a plastic bath it sits on the floor and is cradled from this position. If a steel bath you can hang it at any height.