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How is the bolt grip length calculated in Advance Steel?

  • Software:

    Autodesk Advance Steel
  • Module

    Modeling
  • Question:

    How is the bolt grip length calculated in Advance Steel?
  • Type:

    Modeling
  • Difficulty:

    **

Answer

In a bolt assembly, the bolt length that is taken from an already existent standard needs to cover:

  • The thickness of the washers and nuts that are part of the assembly
  • The projection length
  • The grip length
Advance Steel stores the mapping between intervals of grip length a bolt can cover, and the actual length of the bolt used.

To automatically calculate the length we need to:

1. Open the Management Tools > Bolt editor

2. Select a bolt assembly

3. Go to the "Length" tab. On this tab, the grip length, bolt length and projected lengths can be configured.

How is the bolt grip length calculated in Advance Steel

4. In order for Advance Steel to calculate the bolt and grip lengths for a bolt assembly, we need to add rules for the automatic length calculation.

How is the bolt grip length calculated in Advance Steel

To set a rule we need to select the Rule box (first rule needs to be Rule 1) and then complete the fields with:

  • Bolt length: we need to add, from the bolt table standard, the first bolt length for the respective bolt diameter.

  • Delta of the bolt length: This is defined for each rule, and is the length increment for the bolt. Advance Steel will create a line in the bolt list by taking the first bolt length set on the previous tab, and then add this increment for the next lines. If the bolt has more than one value for this increment, then more rules must be created.

  • Minimum and maximum bolt grip: These values are taken from the bolt standard, but do not include the grip package thickness, which must be calculated by taking the thickness for each nut and washer included in the assembly. This value is subtracted from the minimum grip length for the bolt. The maximum grip length is calculated in the same way, but the value, from the table from which we subtract the thickness of the grip package, is the maximum grip length corresponding to the bolt length rule.

How is the bolt grip length calculated in Advance Steel

5. After the rule information has been added to the fields, click "Save". The Management Tool will automatically calculate the grip for the other bolt lengths, for this rule. It will add enough lines based on the increment to reach the maximum grip length and then it will stop.

How is the bolt grip length calculated in Advance Steel