Is there a Bunnings equivalent to the Kallax Underframe? Looking for the one that is 146x39x18 cm ?
Hello @egipps
Welcome to the Bunnings Workshop community. It's sensational to have you join us, and thanks for sharing your question about putting an underframe under your cube storage.
I'm sorry but Bunnings currently don't have an equivalent to the Kallax underframe. However, it is possible to build a timber underframe using 70 x 30mm 2.4m DAR Rectangle General Purpose Pine in combination with your choice of furniture legs. The timber can then be painted to the same shade as the cube storage you currently have. For a more custom look you can use the timber itself as legs for the frame. I've placed an image below to give you an idea of how it can be assembled.
If you need further assistance, please let us know.
Eric