Bridge Inspection Techniques Practice Test 2026 – Complete FHWA NSTM Exam Prep

Load path redundancy means there are multiple independent routes for load to reach the supports, so the structure can still carry the load if a member is damaged. The minimum to achieve this is three or more members along the load path. With only two members, losing one member can leave a single path that may not be able to carry the load safely, giving little or no alternate route. Having three or more members provides at least two remaining paths to share the load if one member is compromised, maintaining capacity and safety. Four or more offers even more robustness, but the required minimum for redundancy is three or more.