Section 4: Bridge Layout Sheet Checklist
Anchor: #i1004169Preliminary Data Required
Profile grade
data and location (horizontal and vertical curve data)
- Bearing of centerline or reference
line
- Skew angle
- Control stations (begin and end bridge,
bents, intersections, etc.) for railroad underpass and railroad
overpass : RR sta = roadway station at intersection of railroad
and roadway control lines (See comments under “Plan View.”)
- Bridge roadway width, shoulders, sidewalks,
etc.
- Soil exploration data (test holes,
identifications, locations, etc.)
- Profile of crossing and estimated vertical
clearances to all lower roadways and railroad tracks
- Critical horizontal clearances (locations
of railroad tracks, utilities, culverts, nearby structures, etc.)
- Amount and method of varying superelevation
and/or crown
- Railing type
- Contours at crossing (when applicable)
- Header bank slope and approach fill
- Approach slab and curb returns
- Limits and type of riprap
- Approach pavement and crown width
- Traffic direction and stream flow
- North arrow
- Right of way (if required)
- Overall length of structure
- Lengths and types of units/spans
- Existing and proposed ground line
- Hydraulics data (100-year and design
flood elevation and velocities)
- New structure National Bridge Inventory
(NBI) number, design speed, Average Daily Traffic (ADT) and year
(existing and/or proposed) and functional class of roadway are required
for a typical bridge or overpass. For a railroad overpass, NBI
and railroad milepost required. For a railroad underpass, Department
of Transportation (DOT) number and railroad milepost required
- Existing structure shown (dashed) on
plan view and existing NBI number for bridge replacement
- For widenings, show existing structure
on plan view, existing NBI number, and make sure the overall and
roadway widths of both existing and new structures are shown. The
designers will set the actual break line. See Figure 5-16 under Miscellaneous
Slab Information in Chapter 5.
- For staged (or phased) construction
information, see Figure 5-15 under Miscellaneous Slab
Information in Chapter 5.
- Railroad overpass and railroad underpasses:
Because individual railroad requirements may differ, the particular
railroad involved should be contacted regarding any additional requirements.
This effort must be coordinated through TxDOT personnel knowledgeable
in railroad issues.
- If Form 1002 “ PS&E Submission
Data” (page 3 of 3) has not been submitted, it must be completed
and sent with the preliminary layout.
Completed Layout
Plan View
- Reference line,
centerline, or profile grade line (bearing, location, and station).
Railroad overpass and railroad underpass shall also have the railroad
station (RR Sta) at intersection of railroad and roadway control
lines.
- Begin and end bridge stations and elevations
- All bent numbers, stations, and bearings
- Deck joint type, locations, and size
of seal (if used). If a sealed expansion joint (SEJ) is used, give
SEJ type and size.
- Widths (overall, roadway, shoulders,
etc.)
- Traffic direction and stream flow
- North arrow
- Test holes, identifications, locations,
etc.
- Dimensions to features that control
vertical and horizontal clearances (indicate points of minimum clearances
as required, for structures, utilities, railroad tracks, etc.)
- Right of way (if required)
- Horizontal curve data
- Cross slope
- Type and limits of riprap (and blockouts,
if required)
- Skew angle
- Railing type
- Beam line numbers (consistent with
span details)
- Approach pavement and dimensions
- Bridge protection assembly locations
- Show foundation type and location.
See Figure
3-6 in Chapter 3, Foundation Parameters and Calculations,
for orientation of batter for outside piling groups on abutments.
Additional information not shown on examples
- Locate bridge drain and/or bridge lighting
bracket stations on plan view, when applicable.
- Existing structure should be shown
(dashed) on plan view, with existing National Bridge Inventory (NBI)
number shown for bridge replacements or railroad milepost for a
railroad underpass.
- For widenings, show existing structure
on plan view, existing NBI number, and make sure the overall and
roadway widths of existing and new structures are shown. The designers
will set the actual break line.
- For staged (or phased) construction
information, show dimension to stage construction joints.
Elevation View
- Overall length
of structure
- Lengths and types of units/spans
- Overall length and type of railing
for each side (and, if required, median barrier) “End of Bridge
Rail for Payment” note at both ends (for Type T6 rail,
follow instructions on standard)
- Vertical curve data and grade
- Begin and end bridge stations (at face
of abutment backwall) and elevations
- Doweled beam locations
- Minimum calculated vertical clearances
to all lower roadways and railroad tracks (and other clearances
as required, such as utilities, nearby structures, etc.). Railroad
overpass: minimum horizontal clearance from centerline track to
face of interior bent columns, crash wall, retaining wall, or other
obstructions.
- Control or profile grade line
- Existing and proposed ground lines
- Hydraulics data (100-year and design
flood elevations and velocities)
- Grid elevations and stations
- “H” heights
- Types, number, sizes, and lengths of
foundations (and, if required, direction of pile batter and orientation
of footings on elevation and plan views)
- Test hole elevation views and data
- Bent numbers (encircled)
- Special foundation notes (if required
by geotechnical engineers)
- Riprap type
Typical Transverse Section
- Widths (overall,
roadway, shoulders, sidewalks, etc.)
- Profile grade line and/or horizontal
control line
- Cross slope
- Dimension to stage construction joints
for widening or stage construction projects. See Figure
5-15 and Figure
5-16 under Miscellaneous Slab Information in Chapter 5.
- Railing
- Beam type and numbers (if required)
Final Checks
- Standards layout
title with National Bridge Inventory (NBI) number (and Department
of Transportation number for railroad overpass), design speed, Average
Daily Traffic (ADT) and year (existing and/or proposed), and functional
class of roadway
- Dimensions and scales conform to grid
(and elevations)
- Compare layout detail views against
all bridge structural details for compatibility
- Check foundations against structural
details
- Engineer’s seal