Structures Detailing Manual | July 2007
9 - Finish Grade Elevations |

## 9.1 General

A. This drawing is a typical section and schematic plan view of the superstructure that shows finish grade elevations.

B. For spans of equal length, only one schematic plan view need be shown.

C. See SDMEx 15 & SDMEx-16.

## 9.2 Finish Grade Elevations (01/07) Jan 2007 - Deleted (max. 10 feet) requirement for T-lines.

Finish grade elevations are riding surface elevations on the bridge. Show these elevations (to three decimal places) along: centerline of beams or girders, longitudinal construction joints, Profile Grade Line, gutter lines and outside coping lines at their intersections with the following lines: Begin/end bridge, begin/end approach slab, centerline of intermediate substructure components, intermediate diaphragms, transverse construction joints, mid-span, and other equally spaced intermediate locations (T-lines) so that a linear interpolation midway between elevations does not deviate from the theoretical elevation by more than 0.005'.

## 9.3 Layout Line

The layout line for the superstructure schematic plan view is the horizontal control line (See SDM Chapter 2
) from which all the basic distances, lines and angles are referenced for locating the finish grade elevation points. Show the location of the Profile Grade Line and offset distance from the Station Line, when appropriate (this is normally the case for twin bridges).

## 9.4 Centerlines (or Control Lines)

Show and label the following lines:

A. Begin/End bridge and begin/end approach slabs.

B. Centerline of piers or intermediate bents.

C. Centerline of all beams/girders and intermediate diaphragms.

D. Centerline of roadway, median, etc.

E. Gutter Lines.

F. Coping Lines.

G. Construction Joints.

H. Midspan and T-Lines (label numerically starting with 1.)

## 9.5 Title Block

A. The sheet title is "Finish Grade Elevations".