I am writing a paper about land transport using oxen carts and wagons in central Italy during the High Empire (late 1st century BC to early 3rd century AD), including some computing simulations of where these could move or not depending on their load. I am particularly interested on the cart known as plaustrum, which seems to be the typical rural cart used to transport agricultural produce and goods, but I am open to suggestions of other types of carts. For running these simulations, I would need to know the estimated weight of the cart, which I am having difficulty finding.
I have checked several books/papers on the topic (Raepsaet, 2002; Raepsaet 2016; van Tilburg, 2012, amongst others), but I can't find this piece of information anywhere. However, it seems they found a possible (preserved) example in a rural villa in Boscoreale (Italy), but I can't get the book (De Caro, 1994) anywhere to check if there is a detailed description that would include this information...
Any help/idea would be most welcomed!