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The designers of tramways use classical developed engineering formulas to determine stresses. Listed below is a sample of PDF documents that can be downloaded for informational and educational purposes.
US Forest Service Manual: Although this document is rather dated, it does contain basic information about tramways. The document was a labor of love for Chuck Dwyer when he worked for the Forest Service in the 1970’s. Prior to that time Chuck worked as a design engineer for Heron-Poma.
Tiger Wire Rope Engineering Handbook: This document is one of the best for formulas that can be used to analyze. The handbook contains a complete summary of formulas that form the basis for tramway design (pg. 12).
Tramway Manufacturer’s Design Formula: This document summarizes the formulas used by one tramway manufacturer in the basic design of a ski lift.
US Army Manual on Cableway Design: This document was developed by the US Army as a design manual for simple cableway and suspension bridges. The formulas are easy to understand and form the basis for all tramway designs.
Physics Book: This document contains an excerpt from a physics book describing the basic formulas for suspended cable with uniformly spaced loads.
Advanced Cableway Equations: This document has a variety of equations and examples of loading calculations for suspended cables.