with the airlines we handle:
max bag weight is 32kg
This is despite if it's one person or two travelling, yes we make the take out items til it is sufficently under the weight and they are sent to the out of size desk.
excess is charged if the weight exceeds the amount stated on booking sheet or tkt. if there's a couple then 40kgs (generally)
and excess varies remember paying £1.90 per kg with one airline does not mean you will pay the same with every airline. another we handle charges £5 a kg.