Abstract
The wind-induced vibration charecteristics of a 78-ft span aluminum overhead sign structure and the damping requirements to prevent significant vibration were investigated. Stresses in chord members introduced when sections of the truss were bolted together and stresses in menbers at typical joints during vibration were also evaluated. The investigation was divided into three parts: 1- Measurement of stresses introduced during fabrication and by forced vibration: 2- Determination of vibration characteristics: 3- Investigation of effectiveness of vibration dampers.