As in plasterboard sheets? I don’t see why not if hand loading, plenty of vans will fit a 2400x1200 sheet (my Transporter fitted a bunch of plywood with room to spare). Loading one with a forklift is harder due to no side access long enough to fit 2400mm but that’s a problem shared with tub back utes. If however your plasterboard pallet is side accessible a van with barn doors (like you’d buy if pallets were a priority) will allow you load it in fine.