Maximum Deflection in Bridges

1
Chapter 12

• Maximum Deflection in Bridges

2
The elastic deflections of girders due to L.L.
(without dynamic effect) shouldnt exceed-
3
To cancel the deflection due to dead load a
cumber is done during the construction of the
beams or trusses, where the structure will be
have the required shape after erection. In case
of suspension bridges the cumber is done by
adding both the deflection due to D.L. and L.L.
into consideration.   The minimum sections to be
used in structural steel works shall be as
follows-
4
75?75?8
65?65?7
45?45?5
75?50?8
65?50?7
45?30?5