Hi Pallavi,
Could you give us a few more details. Would you include the transportation price in the net value or would you not charge the customer but still accumulate it in a separate GL account and display it in the sales order.
At first glance it does seem like scales should do it. For the freight condition type you could maintain scales assigning first charge for upto 16 mt and then if its more than 16mt you can maintain the fixed value. Would you calculate freight charge using the weight if its more than 16 mt please specify your statement is not very clear
Regards
Madan SHetty