12.
GRADING DESIGN:
12.1
Prepare separate grading drawings based on refinements to the
final schematic. Include earthwork cut and fill 1500 mm (5 feet)
beyond new building wall perimeters, surface drainage design,
pavement grading, and other spot elevations at critical design
areas. Coordinate surface grades with architectural, structural,
and mechanical design to provide proper surface drainage. Storm
sewer criteria is specified in the Sanitary Design Manual.
12.2
Consult soil classification data in the subsurface investigation
(geotechnical report), required by the Structural Engineering
Design Manual.
12.3
Use contours at a maximum interval of 500 mm (two feet) to show
grading of the entire project site. Utilize spot elevations as
control points.
12.4
Show any temporary (construction period) or permanent erosion
control.
12.5
Provide minimum vertical clearances of 2900 mm (9'-6") at loading
zones, parking structure spaces, and along vehicle access routes.
12.6
Include on the grading drawings:
A.
Bench Mark location;
B.
Spot elevations at structure corners, entrances, all first
floor elevations of new buildings and, if appropriate, of
existing buildings.
C.
Spot elevations of all walks and paved surfaces, corners in
parking lots, high and low points, top and bottom of walls,
steps, curbs, and other critical site features.
D.
Accessible routes used by people with disabilities.
E.
Flow lines/center lines of drainage ways with slope gradient.
F.
Intake elevations of all storm drainage elements.
Show all
utility storm sewerage new work on "W" Drawings.
G.
The established grading limits.
H.
The quantity of rock excavation, if required, for the site
grading.
I.
Non-utility shoring required by major site excavation.
J.
Profiles of roads, including:
1.
All changes in grade connected by parabolic vertical
curves of such lengths as to provide safe stopping and
sight distance. Minimize vertical curves between
relatively flat grades to ensure proper drainage. Avoid
sharp horizontal curves at the apex of peak vertical
curves.
2.
Vertical curve data consisting of:
a.
Total length of curve (L);
b.
Stationing at the point of vertical curve (PVC), point
of vertical tangent intersection (PVI), point of
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