Temperature Gradient and Its Effect on Long-Span Prestressed Concrete Box Girder Bridge

Table 2

Weather conditions of the four sunny days.

Data	Weather	Maximum air temperature (°C)	Minimum air temperature (°C)	Average wind speed (m/s)
June 7, 2010	Sunny	20.7	20.1	3.0
June 19, 2010	Sunny	32.1	23.2	3.5
July 22, 2010	Sunny	34.0	28.0	4.7
August 3, 2010	Sunny	37.6	32.0	2.7