How to add total weight of individual items in BOQ

[Arun_Kumar_K]

I defined the weight of all items in the specification, would like to add Total weight for each individual item in BOQ. I added weight property in a column in BOQ, in isometric it shows like below against the weight column in BOQ. Say for example, For a pipe of weight 10 kg/m, it multiplies every cutlist of the particular pipe and displaying all against one item

Pipe           Weight

DN50        10, 60

                   10, 56

                   10, 50

How to add the pipe weight correctly, pls help if anyone knows