the paperwork should state, as well as the un no. the shipping name and packing group but also the transport category, which would give an indication what the load threshold should be for the product(s) carried.
eg, transport category 3 would give you a threshold of 1000 (litres or kgs), transport category 0 would be no threshold.
the consignor or whoever raises the paperwork, should be giving you the info for you to make the judgement.