Published max. gross weight for a 'standard' LD2/LD3, as published in the IATA ULD Technical Manual, is 1588kg/3500lbs. This could be further restricted, as CR2 says, by individual aircraft positions.
Average tare weight is +/-100kgs depending on manufacturer, forkliftable pockets etc. so max loadable weight would be +/- 1490kgs
RT