초록 ▼

A concrete lid for an in-ground utilities box includes a plastic reinforcement structure filled with concrete. The plastic reinforcement structure includes one or more plastic sidewalls that protect the edges of the lid from damage. The upper and lower surfaces of the lid are exposed concrete (with

A concrete lid for an in-ground utilities box includes a plastic reinforcement structure filled with concrete. The plastic reinforcement structure includes one or more plastic sidewalls that protect the edges of the lid from damage. The upper and lower surfaces of the lid are exposed concrete (with the exception of the upper and lower edges of the one or more plastic sidewalls). The one or more plastic sidewalls laterally surround a plastic reinforcement grid, which is centrally located between the upper and lower edges of the one or more plastic sidewalls. The one or more plastic sidewalls can be integrally formed with the plastic reinforcement grid. The plastic reinforcement grid reinforces the concrete lid, eliminating the need for separate reinforcement material. Support struts can be used to support the plastic reinforcement grid while wet concrete is being poured into the plastic reinforcing structure.

대표청구항 ▼

1. A lid for an in-ground utilities box comprising: a concrete core;a plurality of plastic sidewalls forming a perimeter shape that laterally surrounds the concrete core, the concrete core having an upper surface exposed through the plurality of plastic sidewalls at an upper surface of the lid;a fir

1. A lid for an in-ground utilities box comprising: a concrete core;a plurality of plastic sidewalls forming a perimeter shape that laterally surrounds the concrete core, the concrete core having an upper surface exposed through the plurality of plastic sidewalls at an upper surface of the lid;a first edge extension continuous with the plastic sidewalls at a first corner of the perimeter shape, wherein an upper portion of the first edge extension is substantially co-planar with the upper surface of the lid;a first cylindrical section coupled to the first edge extension, wherein the first cylindrical section is laterally surrounded by the concrete core to define a passage; anda second cylindrical section coupled to the first cylindrical section, wherein the second cylindrical section is laterally surrounded by the concrete core to further define the passage, and wherein the first cylindrical section is wider than the second cylindrical section. 2. The lid of claim 1, further comprising a second edge extension continuous with the plastic sidewalls at a second corner of the perimeter shape wherein an upper portion of the second edge extension is substantially co-planar with the upper surface of the lid. 3. The lid of claim 2, wherein the first corner of the perimeter shape is not adjacent to the second corner of the perimeter sham. 4. The lid of claim 1, further comprising a membrane coupled to the second cylindrical section, wherein the membrane is exposed at a bottom surface of the lid. 5. The lid of claim 1, further comprising a plug fitted into the first cylindrical section, wherein the plug is substantially co-planar with the upper surface of the lid. 6. The lid of claim 1, further comprising a bolt that is engaged within the first cylindrical section and extends through the second cylindrical section.