2010 Construction and Material Specifications - Ohio Department of ...

706.05
manufactured as one unit. Provide epoxy coated reinforcement according to 709.00
or 709.14, when these connections are designed using reinforcing steel. Provide
galvanized coatings according to 711.02, when these connections are designed
using connection plates, hardware or concrete inserts.
7.1 Design according to AASHTO LRFD Bridge Design Specifications,
Section 12.14.
7.2 Ensure that the concrete cover dimension over reinforcement is a
minimum of 2 inches (50 mm) in the slab and in the exterior of the leg. Ensure
that the interior of the leg reinforcement cover tapers from 1 inch (25 mm) at the
bottom of the leg to 2 inches (50 mm) at the bottom of the haunch.
Ensure that the ends of longitudinal reinforcement have a minimum
cover of 1/2 inch (13 mm), and spacers used to position the reinforcement are
plastic or epoxy coated steel regardless of whether a corrosion inhibiting
admixture is used.
8 Ensure that the top slab is produced with a keyway joint. The keyway
provides a void volume equivalent to that of 12 inches (300 mm) prestressed beam
as per Standard Construction Drawing PSBD-2-07. Ensure that the joint in the leg
sections is designed to produce a shear key or inter-locking joint. Ensure that nonadjoining
outside legs are flat. Sandblast the joint surfaces to the satisfaction of
the Department, or a 2000 pounds per square inch (14 MPa) water blast no more
than 14 days prior to shipping. Ensure that the culvert is designed such that the
sections when laid together will make a continuous line with a smooth interior free
of appreciable irregularities, all compatible with the permissible variations of
Section 11.
9 Application of membrane waterproofing at any location other than the
final location shown on the plans is prohibited.
9.1 Ensure that the aggregate, cement, and water are manufactured in
conformance with 499.06, 499.07, and 499.09.
Ensure that the temperature requirements of 511.08 and 511.15 are met.
Ensure that the proportion of portland cement is not less than 564
pounds per cubic yard (335 kg/m 3 ) of concrete.
If used, add the corrosion inhibitor as an aqueous solution. Consider
the water in the solution as mixing water for the purpose of determining the w/c
ratio of concrete.
9.2 Cure the three-sided sections in the forms for the length of time required
to obtain the specified minimum design handling strength as defined in the shop
drawings. Test a cylinder to check each section’s design handling strength.
Repeat this test as often as needed. Only one cylinder passing will ensure that the
design handling strength has been met. If the shop drawing shows no design
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