National Steel Bridge Alliance


NSBA Splice takes the time-consuming task of designing and checking a bolted splice connection and rewrites the process with a simple input page and output form. NSBA Splice can be incorporated as a design tool on plate girder bridges allowing the designer to quickly analyze various bolted splice connections to determine the most efficient bolt quantity and configuration. Based upon the updated AASHTO LRFD 8th Edition, NSBA Splice allows the user to explore the effects of bolt spacing, bolt size, strength, and connection dimensions on the overall splice design. 

NSBA Splice is presented in an easy to understand Microsoft Excel spreadsheet format.  The download includes a blank design spreadsheet as well as two completed examples drawn from the inputs and solutions for Examples 1 and 2 presented in Bolted Field Splices for Steel Bridge Flexural Members design guide.  Both the design guide and spreadsheet are current to the AASHTO LRFD 9th Edition specification. 

Download NSBA Splice

The current version of NSBA Splice (v3.15) was released in April, 2023 (Release Notes).