What weight of luggage does british airways take on international flight for business ticket?
Each airline is different, but there is a general limit of 32kg on a single item of luggage (for health & safety reasons), so 20kg would require a separate bag. On British Airways, for example, this would cost about £30 ($50-60), depending on the type of flight, departure airport and on whether the luggage had been pre-checked before arriving at the airport.
Baggage allowances offered by British Airways as follows: In case of hand luggage, adults as well as children can carry one personal and cabin bag. The dimension limit for cabin bags is 56cm x 45cm x 25cm. The dimension limit for hand bag is 45cm x 36cm x 20cm for Maximum weight for each bag is 23 kgs and size of the bag should not exceed 90cm x 75cm x 43cm.
The answer is - It differs from airline to airline, and also across domestic and international airlines. You can refer to my article on Airline Carry on luggage size limits for more information : http://www.luggagelowdown.com/luggage-regulations-and-luggage-restrictions/airline-carry-on-luggage-size-limits-20/
Each airline sets its own limits for luggage weight and size. The requirements may also differ according to your destination - international flights and carriers are less stringent than domestic US carriers - and the class - business and first class allow more luggage than coach class. If you have already booked your airplane tickets, check the airline's website for its exact requirements for your flight.