Structures Design Guidelines | Jan 2009
2 - Loads and Load Factors |

# 2 - Loads and Load Factors

## 2.1 General (07/07) 2007 July: Deleted 2.1.3 Pedestrian Bridges.

This Chapter contains information related to loads, loadings, load factors, and load combinations. It also contains deviations from LRFD regarding Loads and Load Factors as well as characteristics of a structure that affect each.

### 2.1.1 Load Factors and Load Combinations [3.4.1] (01/09) 2009 Jan: Revised completely.

A. In LRFD Table 3.4.1-1, under Load Combination: LL, IM, etc., Limit State: Extreme Event I, use g EQ = 0.0

B. See SDG 2.7.2 for additional temperature gradient requirements
.

### 2.1.2 Live Loads [3.6] (07/07) 2007 July: Added "B". 2006 July - Per TDB C06-01 Added commentary. 2006 Jan: Added Live Loads per TDB-05-12. 2.12 was formerly 2.1.3

A. Investigate possible future changes in the physical or functional clear roadway width of the bridge. (LRFD 3.6.1.1)

Commentary:

Frequently bridges are widened and areas dedicated to pedestrian traffic become travel lanes for vehicular traffic. In the future, the sidewalk could also be simply eliminated in order to provide additional space to add a traffic lane.

B. In addition to the vehicular loads contained in LRFD, satisfy the load rating requirements of SDG 1.7
.

Commentary:

Load Rating may control the design in some cases. TDB C06-01 Deleted Section Jan 2006 2.1.2 Design Permit Vehicles. The information is now covered in Vol 8, FDOT Exceptions to LRFR.