Structures Design Guidelines | July 2005
2 - Loads and Load Factors |

## 2.4 Wind Loads

### 2.4.1 Wind Loads on Bridges [3.8.1]

Increase the wind pressures of LRFD by 20% for bridges located in Palm Beach, Broward, Dade, and Monroe counties. Submit wind pressures for bridges over 75 feet high or with unusual structural features, to FDOT for approval.

### 2.4.2 Wind Loads on Other Structures

Wind speeds for miscellaneous highway related structures are specified in Chapter 29 of the Plans Preparation Manual, Volume 1.

### 2.4.3 Wind Loads During Construction

A. During design, analyze the stability and lateral buckling of beams and girders for wind loading and handling/erection during construction and prior to casting the concrete deck slab. Design temporary bracing, shoring, tie-downs, strong backs, etc. to insure stability and resistance to lateral buckling.

B. When analyzing the stability of beams and girders, the Factor of Safety against overturning taken about the extreme lateral point of contact bearing, must not be less than 1.5, and the wind pressure during construction will be one-half the calculated horizontal wind pressure used for final design.