after 4 year of using UBC, I just find out that the tables for bolts and nail
values are different in 1st edition and 6th edition.
Now on the eve of switching to UBC 97, I urge everybody to use ICBO errata
posted on their site for any revision.
As a professional I feel ICBO should keep a record of UBC buers and notify
them with revisions and/or erros thru mail or email.