PCC SIDEWALK, PEDE STRIAN CONNECTIONS, SECTION 705 AND DETECTABLE WARNING SURFACE 355 SECTION 705 — PCC SIDEWALK, PEDESTRIAN CONNECTIONS, AND DETECTABLE WARNING SURFACES
705.1Description.
This work consists of constructing PCC sidewalk and pedestrian connections and placing Truncated Dome Detectable Warning Surfaces and Directional Tactile Surface Indicators .
705.2Materials.
A.PCC, Class B Section 1022
B.1/2-Inch Preformed Expansion Joint Material Section 1042 .2.A
C.Bituminous Joint Sealant Section 1042 .2.B
D.Liquid Membrane -Forming Compounds for Curing Section 10 45.7
E.Mortar Section 1047.6
705.3Construction
705.3 .1 PCC Sidewalk and Pedestrian Connections .
A.Provide a concrete flatwork technician with an ACI or NRMCA certification, or a certification from
another Department approved certification program, to supervise concrete finishing. Provide the certification to the engineer before placing concrete.
B.Place concrete in accordance with Section 501.3 with special attention to the weather limitations
described in Section 501.3.8.
C.Construction of PCC Sidewalk and Pedestrian Connections.
1.Saw cut in accordance with Section 701.3.
2.Remove bituminous concrete pavement, or PCC pavement, and dispose of in accordance with
3.Prepare the foundation in accordance with Section 701.3.
4.Place GABC at the location and depths shown in the contract and in accordance with Section
301.3.
5.Layout and place concrete in accordance with Section 701.3, unless otherwise specified in the
contract.
6.Joints.
a.Construct contraction joints by tool or saw cutting at a maximum width of 1/2 -inch. Place at 5 -
foot intervals, with the exception of pedestrian connection items, when concrete has cured sufficiently.
b.When there is sidewalk behind the curb, align curb joints to match sidewalk joints.
c.Place Type IV polyurethane -bonded recycled rubber expansion joint in accordance with
Section 701.3.G.
7.Finish and cure curb and sidewalk in accordance with Section 701.3.
PCC SIDEWALK, PEDE STRIAN CONNECTIONS, SECTION 705 AND DETECTABLE WARNING SURFACE 356 8. Backfill sidewalk in accordance with Section 701.3, after removal of forms.
9.Install the 4 -inch PVC sleeve for signs at locations shown in the contract.
10.Construct pedestrian connections in accordance with the requirements of the Standard
Construction Details, any modifications of the Standard Construction Details shown on the plans, and to the requirements of Sections 302 and 705.
11.Provide and install detectable warning surfaces in accordance with the requirements of the
Standard Construction Details and in accordance with Section 705.
12.Perform bituminous patching in accordance with Section 401, or PCC patching in accordance
with Section 503 as shown on plans.
13.The curb and sidewalk components are not to be placed monolithically unless otherwise
directed by the contract or the engineer.
14.Adhere to the requirements of Section 501.5.3 Low Strength Concrete Adjustments.
15.For cracked or damaged sidewalks, remove and replace the complete 5 -foot sections between
the joints .
2 Truncated Dome Detectable Warning Surface and Directional Tactile Surface Indicators
A.Submit certification that the surface of the system is slip resistant, using 1 of the following
standard methods:
1.ASTM C1028 B “Determining the Static Coefficient of Friction of Ceramic Tile and Other like
Surfaces by the Horizontal Dynamometer Pull -Meter Method.”
2.ASTM D2047 B “Static Coefficient of Friction of Polish -Coated Floor Surfaces as Measured by the
James Machine.”
3.ASTM E303 B “Measuring Surface Frictional Properties Using the British Pendulum Tester.”
4.VOSI V41.21 -98 B Universal Specification / Test Method for Slip Resistant Walkways, in the Field
and Laboratory, as measured by a Drag Type Friction Tester Voices of Safety International (VOSI).
B.Use the detectable warning surface pattern shown in the Standard Construction Details or
indicated in the Plans .
C.Use 1 of the following material systems:
1.Precast concrete;
2.fired clay brick paver units; or
3.cast iron plates manufactured with the detectable warning pattern, set in the concrete sidewalk
surface.
D.Fill joints to within 1/4 -inch of the surface, using a method approved by the engineer.
E.Anchor the cast iron plates to the sidewalk surface in accordance with the manufacturer's
recommendations.
F.Do not use stamping systems, applied membranes, or ceramic tiles.
PCC SIDEWALK, PEDE STRIAN CONNECTIONS, SECTION 705 AND DETECTABLE WARNING SURFACE 357 G. Provide a detectable warnings urface color in accordance with the DelDOT ‘s Pedestrian Accessibility Standards for Facilities in the Public Right -of-Way Manual .
H.Construct the base material for the sidewalk section receiving the detectable warning system at a
lower elevation so that the concrete under the detectable warning system is the same thickness as the adjacent sidewalk.
I.Place paver units so the surface is flush with the surrounding ramp and sidewalk surfaces.
K.Place the mortar in accordance with manufacturer’s recommendations.
L.Set paver units in a bed of mortar for adhesion to the sidewalk surface .
1.Use mortar within 30 -minutes after adding water. Do not retemper mortar by adding water.
2.Maintain 1/4 -inch wide joints, no larger than 3/8 -inch. The contractor may use plastic spacers.
3.Keep joints uniform and straight.
M.Maintain clean surfaces and joints.
N.The Department will allow a vertical edge for grade changes up to 1/4 -inch.
O.Bevel edges of the system with grade changes in between 1/4 -inches and 1/2 -inches with a slope
no steeper than 2 to 1.
P.For brick sidewalks, use precast concrete panels or fired brick paver units and:
1.Place units on the same base material and lift thickness as under the brick sidewalk.
2.Place units to achieve a flush surface with the surrounding ramp and sidewalk surfaces.
705.4Method of Measurement.
705.4.1 Sidewalk. The Department will measure the sidewalk quantity as square feet of sidewalk acceptably completed. 705.4.2 Truncated Dome Detectable Warning Surface . The Department will measure the quantity of Truncated Dome Detectable Warning Surface as the number of square feet acceptably completed.
705.4.3 Directional Tactile Surface Indicators The Department will measure the quantity of Directional Tactile Surface Indicators as the number of square feet acceptably completed.
4 Pedestrian Connections
The Department will measure the quantity of pedestrian connections as the square feet of surface area of pedestrian connection acceptably completed. The Department will establish the area of pedestrian connections by measurement of the top of concrete curb (and gutter), sidewalk, and taper areas shown in the contract.
705.5Basis of Payment.
705.5.1 Sidewalk.
A.The Department will pay the quantity for sidewalk at the contract unit price per square feet. Price
and payment constitute full compensation for: PCC SIDEWALK, PEDE STRIAN CONNECTIONS, SECTION 705 AND DETECTABLE WARNING SURFACE 358 1. Excavation within the template of the item including the foundation ;
2.removal and disposal of existing materials;
3.foundation preparation;
4.providing and placing all materials;
5.compaction;
6.forms and forming;
7.supplying, placing, finishing, and curing PCC;
8.joints;
9.expansion joint material;
10.sealing;
11.backfill and backfilling;
12.removing surplus materials; and
13.removing and replacing cracked or damaged sidewalk .
B.The Department will pay for:
1.Excavation and embankment outside the template of the item in accordance with Section 202 at
the direction of the engineer or in accordance with the contract;
2.rock removal in accordance with Section 202;
3.undercut excavation in accordance with Section 202 ;
4.PCC removal in accordance with Section 211;
5.saw cutting in accordance with Section 762;
6.GABC in accordance with Section 301; and
7.bituminous pavement patching in accordance with Section 40 1.
705.5.2 Truncated Dome Detectable Warning Surface .
A.The Department will pay for the quantity of detectable warning surface at the contract unit price
per square foot. Price and payment constitute full compensation for:
1.Providing and placing all materials;
2.installing Truncated Dome Detectable Warning Surface ; and
3.joint sealing.
705.5.3 Directional Tactile Surface Indicators
A.The Department will pay for the quantity of Directional Tactile Surface Indicators at the contract
unit price per square foot. Price and payment constitute full compensation for:
1.Providing and placing all materials;
2.installing directional tactile surface indicators; and
3.joint sealing.
PCC SIDEWALK, PEDE STRIAN CONNECTIONS, SECTION 705 AND DETECTABLE WARNING SURFACE 359 705.5. 4 Pedestrian Connections.
A.The Department will pay the quantity for Pedestrian Connections at the contract unit price per
square feet. Price and payment constitute full compensation for:
1.Excavation within the template of the item including the foundation;
2.removal and disposal of existing materials;
3.foundation preparation;
4.providing and placing all materials;
5.compaction;
6.forms and forming;
7.supplying, placing, finishing, and curing PCC;
8.joints;
9.expansion joint material;
10.sealing;
11.backfill and backfilling;
12.removing surplus materials;
13.constructing and tapering curb required for pedestrian connection compliance; and
14.removing and replacing cracked or damaged sidewalk and DWS .
B.The Department will pay for:
1.Excavation and embankment outside the template of the item in accordance with Section 202 at
the direction of the engineer or in accordance with the contract;
2.rock removal in accordance with Section 202;
3.undercut excavation in accordance with Section 202;
4.PCC removal in accordance with Section 211;
5.saw cutting in accordance with Section 762;
6.GABC in accordance with Section 301; and
7.bituminous pavement patching in accordance with Section 401.
ITEM DESCRIPTION UNIT 705001 PCC SIDEWALK, 4” SF 705002 PCC SIDEWALK, 6” SF 705005 PCC SIDEWALK, 8” SF 705008 PEDESTRIAN CONNECTION, TYPE 1 SF 705009 PEDESTRIAN CONNECTION, TYPE 2, 3 AND/OR 4 SF 705010 PEDESTRIAN CONNECTION, TYPE 5 SF 705011 PEDESTRIAN CONNECTION, SPECIAL SF PCC SIDEWALK, PEDE STRIAN CONNECTIONS, SECTION 705 AND DETECTABLE WARNING SURFACE 360 705012 DIRECTIONAL TACTILE SURFACE INDICATORS SF 705013 TRUNCATED DOME DETECTABLE WARNING SURFACE SF
Source: Delaware Standard Specifications for Road and Bridge Construction, 2025 Edition. Pages 365–370 of 779.