Standards and Building Code Guidelines
There are two well recognized businesses which might be in the procedure for producing ANSI specifications for zip-lines and also the entire obstacle course business. These companies are the Association for Challenge Course Technology (ACCT) and the Professional Ropes Course Association (PRCA). Both companies have pamphlets that they give to every participant which give basic advice for zip lines and other challenge course elements. Please contact both of them if you'd like to study their zip line standards guides.
Building Rules for Zip Lines
Most townships, counties, municipalities, etc... do not have any specific guideline regarding zip lines, and thus they would rather not control their use. It changes, however, in the event the zip-line is for public use or if a fee is charged. Then you almost certainly will need a permit if you build your own backyard zip line. The reason that the Professional Ropes Course Association and also the Association for Challenge Course Technology are seeking ANSI specifications is to give the zip line business some uniformity in training and use of the everyday requirements presently offered by every organization.