Cabin and traveling construction machine with the same

摘要

A rear beam (25) has a first beam (25a) with right and left ends welded to right (22) and left (23) rear supports and a second beam (25b) welded to a front surface of the first beam along the longitudinal direction of the first and second beams. The second beam (25b) is welded to the first beam (25a) so that an upper surface of the second beam (25b) is above an upper surface of the first beam (25a) and a lower surface of the second beam (25b) is above a lower surface of the first beam (25a).