In each verification problem, a table is used to summarize the numerical outputs from STAAD.Pro with a reference or hand calculations. A difference column presents the percent deviation from the reference, when a significant difference exists.

Where a non-significant difference (typically taken to be less than 0.5%) is present, the difference is given is "negligible." Otherwise, the percent difference in results is listed. Where a difference of greater than 2% exists, a comment is provided regarding the difference.

This level of significance is intended to reflect that small differences in rounding or calculation methods do not present a realistic difference in the calculated result.