Select ( Break Element ). Select the Standard option and enter a standard length value. Then select the duct near the end as indicated.

The duct is divided into standard lengths.

Click ( Modify Properties), and select the remainder duct at the opposite end from the pick point.

The remainder length is reported in the duct properties.

Select ( Break Element ), and enter a standard length value. Then select the duct near the opposite end.

The remainder length is now at the other end.