File:Three-Four Bar Truss.jpg

This is a faithful photographic reproduction of an original two-dimensional work of art. The original image comprising the work of art itself is in the public domain for the following reason:

This image (or other media file) is in the public domain because its copyright has expired. This applies to the United States, Canada, the European Union and those countries with a copyright term of life of the author plus 70 years.

Public domain Public domain false false

Faithful reproductions of two-dimensional original works cannot attract copyright in the U.S. according to the rule in Bridgeman Art Library v. Corel Corp. This photograph was taken in the U.S. or in another country where a similar rule applies (for a list of allowable countries, see When to use the PD-Art tag).