The main support for the bath is the 3/4 chip board that moulded into the base of the bath that the brackets screw directly into.
The wooden blocks /frame the black supports screw into usually just split anyway and definitely wouldn't support the weight of a bath full of water with a person sat in as well.
The wooden blocks /frame the black supports screw into usually just split anyway and definitely wouldn't support the weight of a bath full of water with a person sat in as well.