City of Frisco Engineering Standards

Engineering Standards
b. Cast-in-place concrete applicable to TxDOT standard designs for storm drainage culverts
and related structures, retaining walls, manholes, vaults, as well as bridges, shall be in
accordance with the City’s technical specification 033105-Concrete Structures-Cast-in-
Place (TxDOT). Otherwise, concrete for cast-in-place structures shall be in accordance
with the City’s technical specification 033100-Concrete Structures Cast-in-Place (City);
and
c. Precast concrete applicable to precast pipes, TxDOT standard designs for storm drainage
culverts and related structures, manholes, vaults, as well as bridges, shall be in
accordance with the City’s technical specification 034105-Concrete Structures-Precast
(TxDOT). Otherwise, concrete for precast structures shall be in accordance with the
City’s technical specification 034100-Concrete Structures-Precast (City);
17. Responsibility for maintenance of the structure shall be clearly noted on the plans. The plans
shall clearly reference a structure maintenance plan and schedule. The maintenance plan shall
clearly identify any drainage system required to relieve hydrostatic pressure on the structural
system and ensure that it remains fully functional throughout the life of the structure; and
18. Sight visibility triangles (where applicable).
B. Retaining wall plans shall also include the following information:
1. Plan view. The plan view shall include location of soil borings, surface and subsurface
drainage structures and utilities that could be affected by wall construction.
2. Elevation view. The elevation view shall include a profile of the existing ground line along
the wall alignment, proposed finished grade at face of wall, limits of wall payment (if
applicable), top of wall profile, soil boring log shown at the correct elevation and scale, wall
rail if applicable, drainage structures and utilities as noted above. Unless noted otherwise and
approved by the Director of Engineering Services, wall quantities shall be based upon the
surface area of the wall from the top of wall to the bottom of wall. The bottom of wall is
defined as the proposed finished grade at the face of the wall. The bottom of wall shall not be
measured from the top of footing unless the top of footing is the proposed finished grade at
the face of the wall.
3. Estimated quantity table. Include the estimated quantity table for each retaining wall type.
The table should contain the area of wall (for payment) and linear footage of railing (if
applicable).
4. Typical section. The typical section shall include a cross section with wall dimensions and
showing the relationship of the wall to the roadway, property line, or controlling adjacency,
control point(s) for horizontal and vertical alignment (typically the top outermost corner of
the wall), indication of maximum slope on top of and in front of the wall, location of
proposed finished grade, railing type, flume, and mow strip, etc. if applicable.
5. General notes. The general notes shall include a note stating the required minimum
embedment depth of the footing (minimum typically 1’), a note stating that the wall quantity
shall be measured for payment between the top of wall and “x” ft. below finished grade,
railing shop drawing requirements (if applicable), references to all standard sheets (if
applicable) for pertinent information, and any other pertinent information regarding wall
design and construction.
Section 9 – Structural Design Requirements May 2012 Page 9-11