Abstract: A method of manufacturing a fiber reinforced composite material lid for an utility vault including mixing an unsaturated polyester thermosetting matrix in to a resin paste, compounding the resin paste into a fiber reinforced composite material, maturing the compounded fiber reinforced composite material, cutting the matured compound into a charge pattern, molding the charge pattern in a mold cavity of a heated mold under low pressure to form the lid and cooling and machining the lid. The mold includes a cavity die and a core die having a shear angle for interfacing the core die within the cavity die and a steam pot for heating the cavity die and the core die, wherein the lid is molded between the cavity die and the core die and removed from the mold by a lid ejection mechanism.

Abstract: A fiber reinforced polymer material lid or cover for a utility vault made from an unsaturated polyester thermosetting resin matrix, glass fiber reinforcement, an inorganic filler and an ultraviolet inhibitor. The lid or cover has a flat textured upper surface having a plurality of bosses having different heights extending above the upper surface and a bottom surface having an outer perimeter rim with a recessed interior cavity having a number of continuous support ribs extending through the recessed interior cavity from opposite sides of the outer perimeter of the rim to transfer load placed on the lid or cover and minimize deflection under the load to the outer perimeter rim.

Abstract: A method of manufacturing a fiber reinforced composite material lid for an utility vault including mixing an unsaturated polyester thermosetting matrix in to a resin paste, compounding the resin paste into a fiber reinforced composite material, maturing the compounded fiber reinforced composite material, cutting the matured compound into a charge pattern, molding the charge pattern in a mold cavity of a heated mold under low pressure to form the lid and cooling and machining the lid. The mold includes a cavity die and a core die having a shear angle for interfacing the core die within the cavity die and a steam pot for heating the cavity die and the core die, wherein the lid is molded between the cavity die and the core die and removed from the mold by a lid ejection mechanism.

Abstract: A method of manufacturing a fiber reinforced composite material lid for an utility vault including mixing an unsaturated polyester thermosetting matrix in to a resin paste, compounding the resin paste into a fiber reinforced composite material, maturing the compounded fiber reinforced composite material, cutting the matured compound into a charge pattern, molding the charge pattern in a mold cavity of a heated mold under low pressure to form the lid and cooling and machining the lid. The mold includes a cavity die and a core die having a shear angle for interfacing the core die within the cavity die and a steam pot for heating the cavity die and the core die, wherein the lid is molded between the cavity die and the core die and removed from the mold by a lid ejection mechanism.

Abstract: A fiber reinforced polymer material lid or cover for a utility vault made from an unsaturated polyester thermosetting resin matrix, glass fiber reinforcement, an inorganic filler and an ultraviolet inhibitor. The lid or cover has a flat textured upper surface having a plurality of bosses having different heights extending above the upper surface and a bottom surface having an outer perimeter rim with a recessed interior cavity having a number of continuous support ribs extending through the recessed interior cavity from opposite sides of the outer perimeter of the rim to transfer load placed on the lid or cover and minimize deflection under the load to the outer perimeter rim.

Abstract: A method of manufacturing a fiber reinforced composite material lid for an utility vault including mixing an unsaturated polyester thermosetting matrix in to a resin paste, compounding the resin paste into a fiber reinforced composite material, maturing the compounded fiber reinforced composite material, cutting the matured compound into a charge pattern, molding the charge pattern in a mold cavity of a heated mold under low pressure to form the lid and cooling and machining the lid. The mold includes a cavity die and a core die having a shear angle for interfacing the core die within the cavity die and a steam pot for heating the cavity die and the core die, wherein the lid is molded between the cavity die and the core die and removed from the mold by a lid ejection mechanism.

Abstract: A locking system for closing and locking a lid on an enclosure such as a grade level enclosure. The locking system includes a latch formed on an edge of a lid of the enclosure. The latch includes a bolt recess on an upper face of the lid which opens into a slotted wall structure that forms a passage below the lid. The bolt recess has a slotted opening which receives an L-bolt that extends down into a hollow interior of the slotted wall structure. A right angle leg on the L-bolt protrudes below the slotted wall structure when a fastener head atop the L-bolt rests in the bolt recess. The fastener head of the bolt in its at-rest position in the bolt recess provides access for rotating the L-bolt (and its right angle leg) with a tool that fits into the bolt recess to engage the fastener head. The bottom leg of the L-bolt, when rotated to its locked position, protrudes under a locking surface inside the enclosure. This releasably locks the lid to the enclosure.

Abstract: An underground electrical utilities vault and distribution enclosure system comprises a grade level box, for storing underground cables, and a two-part lid comprising a pair of side-by-side cover plates that close the top of the box. One of the split cover plates has an access opening that interlocks with an above-ground pedestal housing. Connections to underground cables contained in the grade level box are made on a frame structure disposed in the pedestal housing. The split cover may contain a removable plug that normally rests at ground level before service is provided to the premises. The pedestal housing can include a separate collar that supports a pre-assembled contact mounting frame and snap locks into a fixed position over the access opening. Separately, the pedestal housing can include a plug base and an integrally molded collar that supports a contact mounting frame.

Abstract: A grade level box for use with underground utilities connections having vertical walls reinforced with exterior vertical and horizontal ribs integrally molded with the wall structure.

Abstract: A locking system for closing and locking a lid on an enclosure such as a grade level enclosure. The locking system includes a latch formed on an edge of a lid of the enclosure. The latch includes a bolt recess on an upper face of the lid which opens into a slotted wall structure that forms a passage below the lid. The bolt recess has a slotted opening which receives an L-bolt that extends down into a hollow interior of the slotted wall structure. A right angle leg on the L-bolt protrudes below the slotted wall structure when a fastener head atop the L-bolt rests in the bolt recess. The fastener head of the bolt in its at-rest position in the bolt recess provides a means of access for use in rotating the L-bolt (and its right angle leg) with a tool that fits into the bolt recess to engage the fastener head.