Specifications include, but are not limited to: C. FOUNDATIONS, POLES, MAST ARMS, AND LUMINAIRE ARMS 1. GENERAL This work includes furnishing and installing mast arm poles, combination mast arm / lighting poles, and all miscellaneous items as indicated in the Contract Documents. Street Light Pole Standard Specifications are found on LSP 92. Pedestal Pole Standard Specifications are found on LSP 90 2. DESIGN CRITERIA Mast arm poles, combination mast arm / lighting poles, shall be galvanized steel or aluminum structures designed in accordance with the 2013 AASHTO Specifications for the Design and Construction of Structural Supports for Highway Signs, Luminaires and Traffic Signals, 6th Edition. A Structural Engineer currently licensed to practice in the State of Nebraska shall seal all designs. The design wind velocity shall be ninety (90) miles per hour. The following design factors shall be used in the design of mast arm pole and combination mast arm / lighting poles: • Wind Speed: 90 mph wind speed. (AASHTO Section 3.8.2, Figure 3.8.3) • Wind Recurrence Intervals: 50-year recurrence interval. (AASHTO Section 3.8.3) • Unreinforced & Reinforced Holes and Cutouts: Design structure unreinforced and reinforced holes to conform to section 5.14.6 (AASHTO Section 5.14.6) • Fatigue Category: Fatigue Category 2 (AASHTO Section 11.6) • Galloping Loads: Structure shall not be designed to resist galloping-induced cyclic loads. • Natural Wind Gust: Structure shall be designed to resist a natural wind gust load of 11.2 mph, based on the yearly mean wind velocity. (AASHTO Section 11.7.1.2)
