Atc 20 1 field manual postearthquake safety evaluation of buildings second edition by applied technology council 201 redwood shores pkwy suite 240 redwood city california wwwatcouncilorg prepared for atc by r p gallagher associates inc oakland california 2005 project manager christopher rojahn publication consultant rdd consultants inc. The atc 20 1 field manual postearthquake safety evaluation of buildings was originally developed under a contract from oes and oshpd published 1989this second edition was developed with funding from the atc endowment fund second edition published 2005 159 pages 2400. He atc 20 1 field manual postearthquake safety evaluation of buildings was introduced in 1989 as a companion document to the atc 20 reportthe second 2005 edition of the field manual has been updated to include the restricted use placard which was introduced in 1995 replacing the limited entry placard updated evaluation forms which were also introduced in 1995. He atc 20 1 field manual postearthquake safety evaluation of buildings was introduced in 1989 as a companion document to the atc 20 reportthe second 2005 edition of the field manual has been updated to include the restricted use placard which was introduced in 1995 replacing the limited entry placard updated evaluation forms which were also introduced in 1995. Atc 20 1 field manual postearthquake safety evaluation of building 2nd edition the atc 20 1 field manual postearthquake safety evaluation of building 2nd edition was introduced in 1989 as a companion document to the atc 20 report