Abstract: Seawalls and methods for making seawalls are disclosed. A seawall may include a concrete footing, with a first plurality of anchorages disposed in the concrete footing. A plurality of precast concrete tee beams may include single-tee beams and/or double-tee beams. Flanges of the tee beams may be positioned to form seaward and landward faces of the wall, and stems of the tee beams may be coupled to the footing between the seaward and landward faces. A second plurality of anchorages may be disposed at tops of the stems. Elongate steel components extend through the stems, and are tensioned between the first plurality of anchorages and the second plurality of anchorages. Interior fill may be disposed between the seaward and landward faces. One or more wave deflectors may be disposed above the tee beams.

Abstract: Seawalls and methods for making seawalls are disclosed. A seawall may include a concrete footing, with a first plurality of anchorages disposed in the concrete footing. A plurality of precast concrete tee beams may include single-tee beams and/or double-tee beams. Flanges of the tee beams may be positioned to form seaward and landward faces of the wall, and stems of the tee beams may be coupled to the footing between the seaward and landward faces. A second plurality of anchorages may be disposed at tops of the stems. Elongate steel components extend through the stems, and are tensioned between the first plurality of anchorages and the second plurality of anchorages. Interior fill may be disposed between the seaward and landward faces. One or more wave deflectors may be disposed above the tee beams.

Abstract: An apparatus for disease prevention includes a face covering shaped to fit under a facemask of a user. The facemask fits over the nose and the mouth of the user. An ultraviolet (“UV”) emitter is coupled to the face covering and the UV emitter is positioned to expose particles between the face covering and the facemask to UV light. The face covering is positioned between the UV emitter and the face of the user.

Abstract: A limited displacement, variable location, post tension anchor assembly wherein a post tension thread bar (or a thread bar attached to an SDB) can be displaced following the encapsulation of the anchor assembly in concrete. The displacement movement is in a plane perpendicular to the axis of the thread bar and is limited to the size of the anchor enclosure assembly enclosure. This device provides a mechanism to compensate for placement errors that can occur for field placement of post tension anchor assemblies in concrete structures that heretofore have been unavailable. In addition, following the correct positioning of the thread bar, there is a mechanism provided to allow for remote pressure grouting of the assembly.

Abstract: Numerous methods utilizing synthetic deformed bars and or high strength post tensioning bars to form earth retaining structures is provided. Methods of constructing the walls described herein are also included. Mechanically stabilized earth panel faced walls are described utilizing synthetic deformed bars or stainless steel grids to secure the wall facing. Numerous types of retaining structures of precast utilizing conventional precast concrete double tee sections in combination with synthetic deformed bars or high strength steel post tensioning bars or steel stress strand are also provided.

Abstract: Connection devices to improve utilization of synthetic deformed bars to transfer tensile loads. Attachment devices for connection of thin wall face panels to mechanically stablized earth walls with minimal tensile loads. Horizontally disposed synthetically deformed bars or other tensionable members utilized to combine precast retaining wall elements.

Abstract: The garment (14) is provided with a pack, such as a day pack or expedition pack. Cushioning pads (26) are located at the pack pressure points, such as about the shoulder and/or hips, which provide more uniform load distribution of the pack weights.

Abstract: A full height, elevated base, pre-manufactured, retaining wall facing system attached to a separate closed face mechanically stabilized earth retention structure Incorporating a continuous closure beam at the top interface of the panel facing and the separate mechanically stabilized earth retention structure.

Abstract: A segmental, anchored, vertical, precast, retaining wall system includes an array of wall panels which can be assembled edge to edge to form a multi-tiered structure. The wall panels are formed with vertical tee stems having bearing surfaces for interlocking wall panels on different tiers and for distributing earth loads between the tiers. Tie rods attached to the tee stems connect the wall panels to precast anchor blocks embedded in the backfill at different vertical levels. The tie rods are protected from corrosion by a sealed tie rod sleeve. The tie rod sleeve is displaced relative to the tie rods during vertical settlement of the backfill to prevent stresses in the tie rod. The retaining wall is self supporting during assembly and can be assembled on a cast-in-place foundation beam without the requirement of additional bracing.

Abstract: A retaining wall system which provides landscape terraces on the face of the structure. The multi-tier retaining wall system uses a plurality of tieback counterfort elements in conjunction with wall panels specifically aligned to produce terraces for landscaping. The design offers a high degree of flexibility in the sizing and spacing of the tieback/counterfort elements so as to meet site specific geometric and geotechnical conditions while using standard precast concrete components or other materials.

Abstract: A retaining wall system which uses rigid tieback elements having portions, column portions and web portions and wall panels disposed between the tieback elements. The tieback elements are designed to produce arching in the soil to reduce bearing stresses on the soil below base portions of the tieback elements by providing web portions sufficiently large to produce a complete ditch condition in the soil upon movement of the rigid tieback elements. This provides an economical retaining wall system in which multiple tiered walls can be spaced by an amount sufficient to produce a complete ditch condition. The wall can be implemented as a vertical wall or as a battered wall.

Abstract: A retaining wall system which provides an essentially a vertical wall without vertically aligned protrusions. The multitiered retaining wall system uses a plurality of tieback elements which act independently of each other to prevent the transference of forces and moments to lower tiers. The design provides a high degree of flexibility in the horizontal spacing of the tieback elements, which is independent of the width of the retaining wall panel, so as to meet specified technical conditions and allow the use of standard size prefabricated concrete components.

Abstract: A retaining wall system utilizing a support structure formed from standard concrete Tee forms. The structural members are assembled using post tensioning devices which impart added strength to the component members. Wall can be employed in a tier configuration, can utilize cross tie members, counterbalancing slabs and foot support devices to offset bending moment forces. The base member can be formed in a Tee configuration or as a single slab unit. The invention can utilize continuous footers and retaining flanges for holding the wall segments.