Glossary | K to R
Layout Marking the actual field location of any part of an excavation, assembly, structure, plumbing and locating that part on a drawing.
Lift hole A small hole cast or drilled in the wall of the pipe or section for inserting a bolt, loop of cable or other device used in handling.
Line of reinforcement Circumferential reinforcement comprised of one or more layers
Longitudinal Reinforcement Reinforcement in a concrete pipe or box section, running parallel to the intended flow.
Lot An assemblage of concrete pipe, all being of like size, material, and strength designation, manufactured by the same process. The lot size may differ from the quantity designated in the contract or order.
Low-pressure air test Testing procedure, utilizing compressed air, intended to determine the acceptability of a pipe section, joint, or pipeline.
Manhole A precast concrete structure for vertical access to pipe line or other closed structure.
Manhole base A concrete slab foundation and the bottom manhole riser section or a bottom manhole riser section or a bottom manhole riser section with a connected concrete slab.
Manhole base section Precast concrete slab foundation and the bottom manhole riser section, or the bottom riser section with precast monolithic or integral slap. A monolithic base section is cast as a single unit. An integral base section is made into a single unit by interconnecting precast manhole components such as a riser section and a base slab.
Manhole reducer A concrete section used as a transition between different diameter manhole riser sections.
Manhole riser A concrete section used to construct a manhole exclusive of the base, reducers, and top sections.
Manhole top The concrete slab top or conical top used to reduce the manhole riser diameter to that of the desired access hole.
Manufacturer The group, corporation, partnership, or individual that manufactures or supplies a product.
Masonry Brickwork, block work, and stonework.
Material tests The quality and property tests of component materials.
Modified design A concrete pipe design changed from a standard design.
Modulus of elasticity The stiffness of a material derived from measuring the elastic deformation of a material under load stress, then dividing the load stress by the deformation.
Mortar A mixture of cement, sand, lime, and water used to join masonry units together.
Non reinforced pipe Concrete pipe designed without reinforcement
Nominal module The approximate size and or dimension of a material or building.
O-ring gasket A solid gasket of circular cross-section.
OSHA Occupational Safety and Health Act.
Owner The public agency or authority, group, corporation, partnership, or individual that specifies products or services for use on a project that it presently or eventually will own or administrate.
Oxidation The rusting of steel or iron.
Permeability That property which permits movement of a liquid through the pores and interstices of the concrete.
Permeability test A test to determine the movement of a liquid through concrete under a hydraulic or pressure gradient.
Pipe A tube or elongated hollow concrete structure intended to transmit flow between locations.
Pipe diameter The inside diameter of a concrete pipe.
Pipe plugs Plugs used to close off a pipe temporarily for the purpose of pressure testing.
Pipe section A single pipe.
Pipeline Pipe sections joined together.
Plant testsThe quality assurance tests performed prior to delivery as a basis of acceptance.
Performed flexible Pliable material, formed into a defined cross-section, that is applied to the surface of a pipe, box section, or manhole section joint, intended to control the movement of fluids or solids through the joint.
Pointing The application of mortar or high strength grout to a joint or hole in masonry or concrete.
Precast concrete Concrete that has been cast and cured prior to its installation.
Prepared backfill A backfill material that has been designed for its intended use by specification.
Pressure test A test of piping for leaks.
PVC Polyvinyl chloride.
Quadrant mat Additional tension zone circumferential reinforcement secured to a layer or reinforcement in the concrete pipe wall.
Rebar A common name for steel reinforcing rods placed in concrete.
Reinforced concrete pipe A pipe structure comprised of concrete and steel reinforcement. Such reinforcement is pipe comprised of steel wire, welded wire fabric, or bars, of known strength, formed into a cage and positioned in the concrete wall in a specified location in such a manner that the two materials act together to resist stresses.
Reinforcement Steel in the form of a continuous wire, welded wire fabric, or bars embedded in concrete and steel act together to resist stresses.
Resilient connector A flexible connection for joining pipe to structures capable of being deformed and deflected without rupture or leakage.
Rubber gasket Rubber formed and used as a seal in concrete pipe joints.
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