ISODRAFT
User Guide
Bolting
:
Bolt Specifications
: Additional Bolting Items
Additional Bolting Items
Each type of bolt can have further material associated with it, such as washers, nuts, locking nuts and isolation tubes. The BLTREFs of the bolt SPCOMs point to SBOLT elements. SBOLTs have the attribute BITEMS, which is a word array with up to 25 elements. Each word represents a BTYP selector for a further bolt SPCOM in the Bolt Specification, such as NUT, LNUT, WASH or ISOL. This generates a further selection of material from the Bolt Specification.
Consider the following example extracted for a single bolt diameter in a Bolt Specification.
Example:
TYPE
DEFAULT
NAME
BDIA
BTYP
CATREF
DETAIL
MATXT
BLTREF
-
-
-
STUD
BOLT
*/BOLTS:M
0.5/8
STUD
/BOLT1
/STUD
/A193-B7
/SS-FAMS-M
BOLT
*/NUT:M
0.5/8
NUT
/NUT1
/NUT
/A193-B7
=0
BOLT
*/WASH:M
0.5/8
WASH
/WASH1
/WASH
/A193-B7
=0
The SBOLT element holds the list of bolt item STYPs, their lengths, and the extension thread length. For example, the SBOLT given by /SS-FAMS-M may have the following attributes:
SBOL
/SS-FAMS-M
BITEMS
NUT
WASH
WASH
Bolt item STYPs
BLIST
0.1/2
0.1/16
0.1/16
Bolt item lengths
XLEN
0.1/8
Extension thread length
Each additional bolt item may have an effect on the calculated length of the bolt (see
Additional Bolting Items in Bolt Length Calculations
).
1974 to current year.
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