A fence section includes an upper horizontal rail and a lower horizontal rail extending along respective upper and lower rail axes. A horizontal upper wall of the upper rail includes apertures spaced apart along the length of the upper rail. Vertical members extend beyond the upper wall through an internal cavity of the upper rail and through a respective aperture. The upper rail includes a first counterpart of a connecting structure for connecting at least one vertical member to the upper rail, the first counterpart being integrally formed with the upper rail. The at least one vertical member includes a second counterpart of the connecting structure, the second counterpart being integrally formed with the vertical member and configured to directly engage the first counterpart of the upper rail upon insertion of the vertical member through the respective aperture in the upper wall of the upper rail.

A method for manufacturing modular retaining wall blocks in natural stone, wherein the blocks are trapezoidal blocks having top and bottom surfaces with channels that receive offset connectors in multiple orientations for building upright, offset, and curved walls. Stone from a quarry is cut or split to form substantially rectangular elongate blocks having top and bottom surfaces, opposed side faces, and opposed ends. A series of channels running parallel to the side faces is cut in each of the surfaces, the top channels lying across from the bottom channels but offset therefrom. The elongate blocks are then cut between opposing pairs of channels to form trapezoidal blocks having front and rear faces.

A plurality of base units is loaded onto a plurality of trailers. The plurality of trailers is coupled to a plurality of trucks. The plurality of trucks is transported to a construction site. The plurality of base units is unloaded from the plurality of trailers and placed at the construction site to form a wall.

Responsive to the difficulties encountered in recycling, disposing of, and repurposing spent tires, as well as the need for durable construction materials, concentric tire structures and methods for making the same are provided herein.

Column and panel concrete fence systems and related methods of construction. Such a method may include placing posts into respective concrete footings, and attaching a 4-arm bracket to each post. The concrete column may be provided in two initially separate portions e.g., each corresponding to a front or back face of the fence. One of the portions (e.g., corresponding to the front or back of the fence) is attached to a given post, supported on one lateral arm of each bracket. The concrete panel may then be advanced into place, and the other portion of the column is attached to the post, over the first column portion that was already attached to the post. The 2.sup.nd portion of the concrete panel is supported on the other lateral arm of the brackets. The panel itself is supported on a middle arm of the bracket, between the lateral column-supporting arms.

A combinative fence assembly includes two posts (1), a plurality of heighteners (2) and a rail (3). Each of the posts (1) has a combining side (10). The two combining sides (10) of the two posts are arranged at an interval and face each other. Each combining side (10) is formed with an inward trough. The heighteners (2) are separately embedded in the troughs (11). The rail (3) is connected between the two combining sides (10) of the two posts (1). Two ends of each rail (3) are separately embedded in the two troughs (11) of the two posts (1) and superposed on at least one of the heighteners (2). Thereby, a fence can be constructed depending on actual requirements.

A method for manufacturing modular retaining wall blocks in natural stone, wherein the blocks are trapezoidal blocks having top and bottom surfaces with channels that receive offset connectors in multiple orientations for building upright, offset, and curved walls. Stone from a quarry is cut or split to form substantially rectangular elongate blocks having top and bottom surfaces, opposed side faces, and opposed ends. A series of channels running parallel to the side faces is cut in each of the surfaces, the top channels lying across from the bottom channels but offset therefrom. The elongate blocks are then cut between opposing pairs of channels to form trapezoidal blocks having front and rear faces.