DIVISION 4
TABLE OF CONTENTS
SECTION
SUBJECT
406
REINFORCING STEEL
I
II
III
GENERAL
1.1
DESCRIPTION OF WORK
1.2
MATERIALS
1.3
SUBMITTALS
EXECUTION
MEASUREMENT FOR PAYMENT
414
RIPRAP
I
GENERAL
1.1
DESCRIPTION OF WORK
1.2
MATERIALS
1.3
SUBMITTALS
EXECUTION
MEASUREMENT FOR PAYMENT
II
III
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PAGES
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406-1
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406-2
406-2
414-1
414-1
414-1 to 414-2
414-2
414-2
414-3
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SECTION 406
REINFORCING STEEL
I.
GENERAL
1.1
DESCRIPTION OF WORK
The Contractor shall furnish, fabricate, place and protect all reinforcing steel or wire mesh (including all
wires, ties, clips, supports, chairs, spacers, and other accessories), used in concrete operations and
masonry construction, all in accordance with the Contract Documents.
1.2
MATERIALS
Materials shall be furnished by the Contractor in accordance with Section 200.
1.3
SUBMITTALS
A.
Submittals shall be made by the Contractor in accordance with the procedures set forth in Section
105 and as described below:
The Contractor shall submit complete shop drawings of all material proposed to be furnished and
installed under this Section. These drawings shall include:
1.
Bar schedules, stirrup spacing, diagrams of bent bars, reinforcement arrangement and
assemblies, bar splices and laps.
2.
The drawings shall provide sufficient detail to permit placement of reinforcement
without use of design drawings.
3.
Shop drawings shall satisfy the requirements of ACI Standard 315.
B.
Accompanying the shop drawings, the Contractor shall submit the steel producer’s certificates of
mill analysis, tensile, and bend tests for reinforcing steel.
C.
Where mechanical couplers are required or permitted to be used to splice reinforcing steel, the
Contractor shall submit manufacturer’s literature which contains instructions and
recommendations for installation for each type of coupler used; certified test reports which verify
the load capacity of each type and size of coupler used; and shop drawings which show the
location of each coupler with details of how they are to be installed in the formwork.
D.
If reinforcing steel is spliced by welding at any location, the Contractor shall submit mill test
reports that shall contain the information necessary for the determination of the carbon equivalent
as specified in AWS D1.4. The Contractor shall submit a written welding procedure for each type
of weld for each size of bar which is to be spliced by welding.
E.
Welders shall be qualified per AWS and Contractor shall submit welder qualifications prior to
beginning work.
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II.
EXECUTION
The Contractor shall execute the Work in accordance with the latest edition of the VDOT Road and
Bridge Specifications, Section 406.03, Procedures. Any references to “Engineer” or VDOT personnel
shall mean the “Owner”.
III.
MEASUREMENT FOR PAYMENT
A.
Reinforcement steel, when a pay item, will be measured in pounds of steel placed in the structure
as shown in the Contract Documents or Standard Details. The weight of welded wire mesh will
be computed from the theoretical weight per square yard placed, including allowance for laps not
to exceed 8 percent of the net area. Reinforcing steel or welded wire mesh will be paid for at the
contract unit price per pound.
B.
Epoxy-coated reinforcement steel, when a pay item, will be measured in pounds of uncoated steel
and will be paid for at the contract unit price per pound. The weight will be computed from the
theoretical weights of the nominal sizes of steel specified and placed in the structure.
Measurement will not be made for epoxy-coating material.
C.
When not a pay item, the cost of reinforcing steel shall be included as an incidental item in the
bid price for other specified pay items.
D.
Items considered incidental work will not be measured for payment or paid for as such. Incidental
items are identified in Section 109.1.2 and also include the following:
Furnishing, applying, and repairs of epoxy-coating material.
E.
No payment will be made for fastening devices that may be used by the Contractor for keeping
reinforcing bars in their correct position. When the substitution of larger bars than those specified
is allowed, payment will be made for only the amount of metal that would have been required if
the specified size of bar had been used. When full-length bars are shown in the Contract
Documents and the Contractor obtains approval to use short bars for convenience, the weight paid
for will be based on the full-length dimensions with no allowance make for splices.
End of Section
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SECTION 414
RIPRAP
I.
GENERAL
1.1
DESCRIPTION OF WORK
The Contractor shall furnish all labor, supervision, material (except as herein provided), tools, equipment,
supplies, and services; and, shall perform all Work necessary for providing and placing the specified type
of riprap in accordance with the requirements of these specifications and in reasonably close conformity to
the dimensions, lines, and grades shown in the Contract Documents or as established by the Owner.
1.2
MATERIALS
A.
Riprap shall conform to the requirements of Section 200.
B.
Sand shall conform to the requirements of Section 200. Grading A, B, or C sand may be used in
mortared or grouted riprap.
C.
Mortar and grout shall conform to the requirements of Section 200.
D.
Geotextile bedding shall conform to the requirements of Section 200.
E.
Welded wire fabric shall conform to the requirements of Section 200.
F.
The classes of dry riprap shall be as follows:
G.
June 2016
1.
Class I: Stones shall weigh between 50 and 150 pounds each. At least 60 percent shall
weigh more than 100 pounds, and approximately 10 percent may weigh 50 pounds or
less.
2.
Class II: Stones shall weigh between 150 pounds to 500 pounds each. At least 50 percent
shall weigh more than 300 pounds, and approximately 10 percent may weigh 150 pounds
or less.
3.
Class III: Stones shall weigh from 500 pounds to 1,500 pounds each. At least 50 percent
shall weigh more than 900 pounds, and approximately 10 percent may weigh less than
500 pounds.
4.
Class AI: Stones shall weigh between 25 and 75 pounds each, except that approximately
10 percent may weigh 25 pounds or less and 10 percent may weigh 75 to 100 pounds.
Dumped riprap is classified according to the following types:
1.
Type I: Core riprap shall be composed of compact angular pieces of derrick stone
weighing from 3/4 ton to 2 tons each with an average weight of approximately 1 ton.
Approximately 10 percent by weight may weigh less than 3/4 ton.
2.
Type II: Heavy riprap shall be composed of compact angular pieces of derrick stone
weighing from 3 to 10 tons each with an average weight of approximately 4 tons.
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Approximately 10 percent by weight may weigh less than 3 tons.
H.
Mortared Riprap stone shall be the same size as specified for Dry Riprap, Class II, and shall
be selected to obtain fairly large, flat-surfaced stones that will produce a true and even surface
with a minimum of voids.
I.
Grouted Riprap for Slopes: Stones shall be of the same sizes and placed in the same manner
as specified for Dry Riprap, Class I. Grout shall consist of 1 part hydraulic cement and 3 parts
sand, thoroughly mixed with water to produce grout having a thick, creamy consistency.
J.
Erosion Control Stone for Culvert Outlet Protection shall conform to the requirements for Dry
Rip Rap Class AI, I, & II respectively of (a) herein for weight.
K.
Erosion Control Riprap
Riprap shall consist of sound, nonerodible shot rock. Erosion control riprap rock shall be not
more than 15 inches in its greatest dimension and shall contain a sufficient percentage of smaller
rocks to provide a reasonably dense mass with a thickness of at least 8 inches.
L.
Concrete Riprap in Bags shall be either wet or dry mixtures as follows:
1.
Wet mixture
Riprap shall consist of Class A3 concrete in suitable burlap bags. Bags shall weigh
approximately 100 pounds when 2/3 filled with concrete.
2.
Dry mixture
Riprap shall conform generally to the requirements for wet mixtures except that the
mixture shall consist of the dry ingredients and the Owner will not enforce the
requirements for water, consistency, and air.
Dry riprap may be in burlap or paper bags. Riprap shall be a rectangular solid enclosure
approximately 3 inches in thickness and shall weigh approximately 80 pounds per bag.
Paper bags shall be perforated throughout on approximate 1-inch centers and shall be of
adequate seal, thickness, and strength to maintain the integrity of the riprap until the
concrete mixture sets. Bags shall be biodegradable.
1.3
SUBMITTALS
When required by the Owner, the Contractor shall submit certifications in the form of affidavits from the
material suppliers, together with supporting data, attesting that the riprap meets specification
requirements.
II.
EXECUTION
The Contractor shall execute the Work in accordance with the latest edition of the VDOT Road and
Bridge Specifications, Section 406.03, Procedures. Any references to “Engineer” or VDOT personnel
shall mean the “Owner”.
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III.
MEASUREMENT FOR PAYMENT
The price for the various types of riprap shall include, as appropriate, furnishing and placing riprap,
including mortar, grout, welded wire fabric or geotextile bedding material (when not included as a
separate pay item) including overlaps when required, mortar or grout; excavation; and granular riprap
bedding material. The price shall also include preparing the surface, repair work, and excavating and
backfilling toe-ins.
A.
Riprap will be paid for at the contract unit price.
1.
Dry riprap will be measured and paid in square yards of surface area or tons as specified
in the Bid form.
2.
Mortared riprap will be measured and paid in square yards of surface area for the type
specified.
3.
Grouted riprap will be measured and paid in square yards of surface area or tons as
specified in the Bid form.
4.
Dumped riprap will be measured and paid in square yards of surface area or tons as
specified in the Bid form.
5.
Concrete riprap in bags will be measured and paid in cubic yards as specified in the Bid
form.
B.
Erosion control riprap will be measured and paid at the contract unit price in square yards of
surface area or tons for the Class specified on the Bid form.
C.
Erosion Control Stone used for Culvert Outlet Protection will be measured in square yards of
surface area or tons for the Class and Standard specified and will be paid for at the contract unit
price per square yard or ton.
D.
Incidental items are identified in Section 109.1.2 and, unless otherwise indicated in the Bid form,
also include the following:
1.
Erosion and sediment control materials and effort necessary to perform the Work.
End of Section
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