The engineering constraints that has to be taken care of while splitting the parts are specified as the Joint Rules. There are some rules/ norms that each part has to satisfy in order to be considered for splitting.
General Joints Rules/ Splicing Norms
| Sr. No. | Rules | Purpose | Default values |
| 1 | Minimum part length consider for splitting | It specifies the smallest part that can be considered for splitting. | 6 meters (6000 mm) |
| 2 | Minimum length of smaller piece of a part on splitting | This rule specifies that the split made should be greater than this length | 1.2 meter (1200 mm) |
Joints range for flange
| Sr. No. | Rules | Purpose | Default values |
| 3 | Minimum joint position (Ref pic. below) | It says the minimum split piece should not be less than this length.. | Part Length/5 = 0.2 * Part Length |
| 4 | Maximum joint position | It says that joint is not allowed after this position. | Part Length/3 = 0.3333 * Part Length |
Joint range for web
| Sr. No. | Rules | Purpose |
Default values |
| 5 | Joint distance | It says web can split at this position. | Part Length/2 = 0.5 * Part Length |
| 6 | Tolerance for Web joint | It gives the range in which a web part can be split. |
+/- 250mm |
Multiple Joints
| Sr. No. | Rules | Purpose |
Default value |
| 7 | Maximum Joints | It gives the maximum number of joints allowed. Manually you can specify 4 joints but auto spits takes only 3 joints even though specify 4. | 1 |
The rules can be viewed and modified as per your preferences from the Tools->Joint Rules... menu. On clicking this menu item the following Joint Rules... dialog will appear.
Joint Rules
Note:
For a flange or a web part only one joint is allowed.
General rules are applicable to all the three types of parts.
The rules need not be set with each and every job. They should be set only once as far as possible.