I just looked at a job replacing 6x6 timbers that surround a brick walkway. Approx. 360' of timber. The old timbers are starting to rot but most pieces should come out without crumbling. Looks like a fairly east replacement. Have never really done much of this type of work and was wondering how to bid this, should it be by estimated time and material or are there linear foot methods for this? Thanks for any help.