Selectors

The Selection (SELEC) questions must be place in the correct order. The following headings meet the requirement:

OTYPE

Specifies the Generic Type (GTYP) attribute of the owning GENSEC.

ATYPE

Specifies the GTYP attribute of the attached GENSEC.

OCLASS

Specifies the StruClassification attribute of the owning GENSEC.

Note:
The StruClassification attribute must be set to BEAM or COLUMN for automatic joint selection to work. This is a limitation of using automatic joint selection

ACLASS

Specifies the StruClassification attribute of the attached GENSEC.

Note: The StruClassification attribute must be set to BEAM or COLUMN for automatic joint selection to work. This is a limitation of using automatic joint selection

POSL

Specifies the Posline attribute of the PLDATU owning the FIXING.

JREL

Specifies the relative size of the owning and attached GENSECs.

Note:
The JREL question is only relevant when the OCLASS and ACLASS are both set to BEAM. The options are EQUA where the owing and attached beams are the same depth, GREA where the owning beam depth is greater than the attached beam depth and LESS where the owning beam depth is less than the attached beam depth.

STYP

Specifies a sub-type of joint that can be selected. An STYP question must be included in an automatic joint specification before any depth or width questions. This allows several types of joint with the same size range criteria (for example, ADEPTH) in the same specification.

ODEPTH

Specifies the DPTH property of the owning GENSEC. For example, a value of 80,140 matches a GENSEC with a DPTH property greater than or equal to 80 and less than or equal to 140.

ADEPTH

Specifies the DPTH property of the attached GENSEC. For example, a value of 80,140 matches a GENSEC with a DPTH property greater than or equal to 80 and less than or equal to 140.

OWIDTH

Specifies the WIDA property of the owning GENSEC. For example, a value of 80,140 matches a GENSEC with a WIDA property greater than or equal to 80 and less than or equal to 140.

AWIDTH

Specifies the WIDA property of the attached GENSEC. For example, a value of 80,140 matches a GENSEC with a WIDA property greater than or equal to 80 and less than or equal to 140.

NOFJ

Specifies the number of PLDATU members for the parent JLDATU of the selected FIXING.

An example of using the NOFJ question would be where a JLDATU owns two PLADATUs, each owning a FIXING, for example, where a larger beam has two smaller beams framing into each side of the web. If a joint has a stiffener on the opposite side of the web, this would clash with the opposing beam. This joint would have the NOFJ set to 1, meaning that if there are two PLDATUs then the joint is not a valid selection. Refer to NOFJ rule applied for Automatic Selection of Joints for further information.

Not all questions are required, for example:

• If the JREL is EQUA, only the ODEPTH or ADEPTH question must be used since the beams are the same size.

• If the JREL is GREA or LESS, only the ADEPTH question must to be used.

NOFJ rule applied for Automatic Selection of Joints

Automatic joint selection allows the number of joints owned by a JLDATUM element to be one of the questions (NOFJ) in an automatic joint specification. This allows the selection of a joint to be determined by other joints owned by the same JLDATUM. However, creation of the second and subsequent joints may require that the first joint selection is changed.

The following workflow is possible with an appropriately configured specification.

The rules for revisiting existing joints and reselecting them are:

• Any joint (FIXING) with unset SPREF is not changed.

• Any joint with a SPREF referencing a different SPEC (automatic AJOI or standard JOIN spec) is not changed.