Design Examples of Steel and Steel-Concrete Composite Bridges - Finite Element Analysis and Design of Steel and Steel-Concrete Composite Bridges - page 365

3600

1500

4500

S

2700

S 2

S 2

S 3

S 3

S

1800 1800 1800 1800 1800

L = 6×4500 = 27,000 mm

9000 mm

Elevation

Cross-section S - S

1800

1800

1800

1800

1800

27,000
Plan of lateral shock (nosing force) bracing
(section S 2 - S 2 )

1800

1800

1800

1800

1800

27,000
Plan of lower wind bracing with braking
force bracing (section S 3 - S 3 )

Figure 4.127 General layout of a double track open-timber floor plate girder pony
railway steel bridge (the fourth design example).

4.5.1 Design of the Stringers
Let us start by designing the stringers supporting the track as shown in
Figure 4.126 .

Dead Loads

Half weight of the track load ¼ 3kN = m

Weight of stringer bracing ¼ 0 : 3kN = m