Bolt Tables

ISODRAFT User Guide

Bolting : Bolt Tables

The BLTAB (Bolt table) element is the administrative element for bolting information selected from the bolt specifications. It can own BLIST (Bolt List) and LTAB (Length Table) elements.

•

The BLIST (bolt list) element is the administrative element which owns SBOLT (single bolt) elements.

•

Each SBOLT has the following attributes:


	NST	A pointer to a standard length array
	BITEM	Additional bolt items to be used when calculating bolt length
	BITL	The lengths of the additional bolt items

•

The LTAB (length table) element is the administrative element which owns DTAB (diameter table) elements.

•

Each DTAB element has a BLEN (bolt length array) attribute containing all available lengths of bolts for a given diameter and material specification. This data is used by ISODRAFT for calculating bolt length requirements. When ISODRAFT calculates that a bolted connection requires a bolt length, it scans the BLEN array for a length which is equal to or greater than the calculated length. The length found is output in the material list.

Note:

Any associated nuts, washers and other bolting items can be included in the material list by adding them to the bolt detail and material descriptions in the catalogue definitions. Nuts and washers can be included in bolt length calculations as described in Additional Bolting Items in Bolt Length Calculations.