...
The
...
reference
...
point
...
of
...
a
...
bridge
...
deck
...
section
...
is
...
located
...
at
...
the
...
midpoint
...
between
...
exterior
...
girders.
...
For
...
concrete
...
flat
...
slabs,
...
the
...
reference
...
point
...
is
...
midway
...
between
...
total
...
width
...
minus
...
overhanging
...
portions.
...
For
...
additional
...
details
...
and
...
visuals
...
on
...
reference
...
point,
...
insertion
...
point
...
,
...
and
...
center
...
of
...
gravity
...
,
...
please
...
see
...
Figure
...
1:
