|
| |
Home>Economic
Development>Municipal
Design Standards>Part 2- Sidewalks & Trails
Municipal Design Standards Part 2 - Sidewalks & Trails
Revised July 2004
2.01 APPROVALS AND PERMITS:
A. A sidewalk
construction permit must be obtained from the City Engineer for all sidewalk
construction not associated with the construction of a new house or business for
which a building permit has been obtained. However, the standards set forth in
this document apply to all sidewalk construction.
2.02 TRAFFIC CONTROL:
A. The contractor shall provide lighted barricades to protect
pedestrians.
2.03 WIDTH AND LOCATION:
A. Sidewalk width shall be as defined in
Table 2.1, except as
noted in Section 2.05.
TABLE 2.1
|
Local |
4’ |
|
Collector |
4’ |
|
Arterial |
4’ / 8’1 |
|
Commercial |
As directed by the City Engineer |
|
Industrial |
4’ |
|
Major Bridges |
8’ |
|
1 A 4’ walk will be required on one side and an 8’
walk on the other. The City Engineer will designate which side the 8’ walk
will be on. |
B. Sidewalks shall be located 1 foot from the property line,
except in areas in which a different offset is required to match existing walks.
C. No sidewalks shall extend to the street perpendicular to
the curb except at intersections and designated mid-block crossings. Such
existing sidewalks removed for construction or maintenance activities shall not
be replaced.
D. Sidewalks are generally required on both sides of all streets.
2.04 CROSS SLOPE:
A. All sidewalks
shall slope to the street at a rate of 2%.
B. The street
edge of the sidewalk shall be located above the curb ½ inch for every foot
horizontally from the curb.
2.05 MATCHING EXISTING WALKS:
A. The width and location of a new sidewalk shall be varied
to match the width and location of existing sidewalks in the area. However, the
sidewalk width shall not be reduced to less than 4 feet.
B. Sidewalk cross slope may be varied through a gradual transition to match
existing adjoining walks. Contact the Engineer if existing adjoining walks vary
significantly from existing standards.
2.06 MATERIAL AND THICKNESS:
A. Sidewalks shall be constructed of Portland cement
concrete conforming to the Iowa Department of Transportation C-3 mix. Maximum
slump shall be 3 inches.
B. Sidewalks 4 to 6 feet wide shall have a minimum thickness of 4 inches.
Sidewalks greater than 6 feet wide shall have a minimum thickness of 5 inches
with fiber mesh reinforcement or 6 inches of non-reinforced concrete. Sidewalks
crossing driveways shall be a minimum of 6 inches thick.
2.07 JOINTS AND FINISH:
A. Sidewalks shall have a uniform texture with a broom
finish.
B. Tooled joints are permissible on sidewalks less than 6 feet in width. Framing
is permissible on sidewalks with tooled joints and should match existing
adjoining sidewalk. The maximum depth of framing shall be 1/16 inch. The joint
depth shall be ¼ the sidewalk thickness. The joint width shall be minimized.
C. Sawed joints are permissible for all widths of sidewalks. The joint depth
shall be ¼ the sidewalk thickness.
D. Sidewalk joints shall be delineated through driveways.
E. Sidewalk joints shall be spaced to form square panels.
F. Preformed expansion joints, ½ inch in width, shall be installed at
approximately 100-foot intervals or at property lines in new residential or
commercial construction. Preformed expansion joints, ½ inch in width, shall be
installed adjacent to all curb ramps. See
Figure 2.1.
G. Stamped imprints indicating the contractor and date of construction are
permissible. The size of the imprint shall be limited to less than 4"x6" and the
depth to less than ¼".
H. Apply curing compound immediately following finishing operations or cure with
moist burlap for not less than 24 hours. Curing compound on sidewalks is
recommended (not required).
2.08 CURB RAMPS:
A. Sidewalks shall provide a curb ramp for accommodation of
the handicapped at all intersections and designated crossings.
B. Curb ramps shall be located in line with the public sidewalk as shown in
Figure
2.1.
C. Curb ramps shall be at least 48 inches wide between the curbs and should be
sloped at not greater than one inch of rise per twelve inches linear distance
(8%). A slope no greater than one inch of rise per eight inches linear distance
(12.5%) may be used where necessary. The cross slope of curb ramps shall not
exceed 2%.
D. Detectable warnings shall be Precast Concrete, Brick Inlayed, or Vitrified
Polymer Composite (VPC) cast-in-place tile (surface applied not allowed).
Detectable warnings shall be provided at all curb ramps. Stamped concrete is not
allowed. Precast or brick shall be inlayed in concrete boxout with 6” concrete
bottom and 1” asphalt setting bed. Masonry sand shall be used to fill joints in
brick or precast. Sealed expansion joint shall be provided between precast/brick
and concrete boxout. Brick, precast concrete, or VPC shall be red or brick in
color. Painting of the surface is not allowed.
E. The current standards of the Americans with Disabilities Act (ADA) will
govern in all cases.
2.09 TRAILS:
A. In general, trails shall be designed to the same standard
as sidewalks.
B. Trails designed for public use shall be a minimum of eight feet wide.
C. To the extent practicable, trails shall comply with the provisions of the
Americans with Disabilities Act (ADA).
D. The trail surface shall be of one of the designs shown in
Figure 2.2. Surfaces
other than P.C.C. will require approval of the City Engineer. Where water is
expected to overtop the trail, only non-erodible surfaces shall be used.
E. Trails designed for the use of bicycles shall be designed to the standards of
the American Association of State Highway and Transportation Officials' "Guide
for the Development of Bicycle Facilities."
F. Trails that also serve as vehicular access for utility maintenance activities
shall be constructed of Portland cement concrete and have appropriately designed
radii.
Back to top.
|
