Bridge geometry - Computational Analysis and Design of Bridge Structures - page 560

18.5 BrIdge deck PoInt calculatIons
During the construction of a bridge, certain points on the bridge deck may
need to be verified to control bridge geometry, specifically to control the
finished grade on the deck. In general, any point on the deck can be desig-
nated as a control point. However, intersections of girders, curbs, or medi-
ans and diaphragms are usually the default control points for deck grade
verifications.
As discussed in Section 18.3, having the separated representations in
plane and vertical curves of a 3D roadway mainline and transverse curve
definitions of each cross section, any point on the roadway surface or deck
can be evaluated. When reporting elevations of these control points, preset
camber values on these points should be separated from derived elevations
that are obtained by roadway geometry definitions. Cambers are usually
required for a bridge to counter vertical structural displacements due to
dead loads and/or part of live loads.
Figures 18.13 and 18.14 show an example of bridge deck control points.
In Figure 18.13, each triangle mark indicates the location of a control point
Figure 18.13 Calculated deck points on plane view.
Figure 18.14 Deck points in 3D view.