HPT

9.2Grid Columns and Footings, Rail Attachment:

Although the Grid support columns (“Grid Columns”), are relatively massive, measuring at least six (6), feet in diameter, they are constructed using common materials such as typical concrete and reinforcing steel. The foundations may be bell shaped or shaped in any other manner, sufficiently deep to accommodate the design loads of a fully implemented System. A typical Grid Column may have driven steel pilings to add support and stability. Atop the Grid Column, situated by a series of shims, is a simple steel “I” beam which spans the Grid Columns. The I beam is connected to the Grid Columns by standard bolts, much as bridge trusses are attached to abutments. The Grid Rail is completed by the installation of a continual (to the extent possible), titanium or stainless Cap, or in some cases may be completed using a poured fiberglass/epoxy or high-strength plastic surface. The joinery of the Cap splices (in the limited areas where they may exist), is of critical importance for a smooth transition and comfortable Grid vehicle ride for Phase I and II vehicles. It is less important in Phase III implementation and regular steel may be utilized in Phase III construction without a Cap. The Grid Rail is banked with shims to balance the effects of circumferential force in turns.