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System Failures of Zip Line Hardware in Trees

By Christopher Larson, BCMA, TRAQ
Expert Article

Trees are commonly utilized as support systems for zip lines, tree houses, and other structural applications. These arrangements can be more complex than traditional construction methods because they…

Tree Felling: Tree Removal Mishaps

By Christopher Larson, BCMA, TRAQ
Expert Article

Trees are frequently removed by cutting near the base of the trunk; this is commonly known as Tree Felling. This form of tree removal is physically challenging and can be dangerous if the process is…

Hazard Tree Identification

By Christopher Larson, BCMA, TRAQ
Expert Overview

In this article, forensic arborist Christopher Larson addresses some of the relevant issues in tree-related litigation. He discusses physical signs that indicate a tree may be failing, industry…

Atypical “Other Structure” Collapses

By Mark Duckett, P.E., S.I.
Expert Article

In this article we explore the engineering issues associated with the load requirements of atypical structures, referred to in building codes as other structures. Investigating an Atypical "Other…