As far as my knowledge beam is very tricky thing which needs to be utilized with very sharp mind,
The person is saying true but only he doesnt know where to place it.
As far as i have leart from my Boss who went to Europe in 1969 for Engineering and has retired as MD Wasa, The beam you should use while filling the lanter, because when you will do so, it will not only lift the weight of itself but also would be supporting to under roof,
But your case has changed so i think you should go with his advice and if you are not interested ten you can go without beam as well, no issues whatsoever Inshallah because even if you go for beam the overall weight will be still on under roof and even the weight will be more after adding beam.
Rest choice is yours.
Take care