Post-tension running track

A post-tensioned running track comprising:

• a concrete base extending circumferentially around an interior area, wherein the concrete base includes an inner edge and an outer edge and a width there-between;
• a plurality of transverse post-tensioning cables provided within the concrete base and extending in a transverse direction across the width of the concrete base at respective locations;
• multiple sets of box-out areas provided in the concrete base, wherein the sets of box-out areas are spaced apart from one another along the length of the concrete base, and wherein each set of box-out areas includes:
• a plurality of individual box outs areas that are spaced apart in the transverse direction such that a portion of the concrete base extends in the lengthwise direction between at least two of the box-out areas in the set;
• and
• multiple sets of lengthwise cable segments suspended within the concrete base, wherein each set of lengthwise cable segments comprises:
• a plurality of lengthwise cable segments arranged in series and extending in a lengthwise direction such that each set of lengthwise cable segments extends about the footprint at a respective position between the inner edge and the outer edge, and
• wherein the series of lengthwise cable segments in each set are joined end to end in respective box-out areas thereby defining respective lengthwise cable structures that extend continuously about an entire circumferential length of the concrete base in the lengthwise direction.

A method of constructing a post-tensioned running track, the method comprising:

• arranging, within a predefined footprint of a base, multiple sets of lengthwise post-tensioning cable segments, wherein each set comprises a plurality of lengthwise cable segments arranged in series and extending in a lengthwise direction such that each set of lengthwise cable segments extends about the footprint at a respective position between an inner edge and an outer edge of the base;
• forming a concrete base structure, wherein the concrete base structure is formed around the sets of lengthwise cable segments such that free opposing ends of successive cable segments of each set are disposed within a discrete respective void formed in the concrete base structure;
• the respective voids being formed within the concrete base structure such that they are spaced apart from any adjacent respective voids in the transverse direction;
• for each set of lengthwise cable segments, joining the lengthwise cable segments in series in respective voids thereby defining a respective lengthwise cable structure that extends continuously about an entire circumferential length of the base;
• performing a partial tensioning of the lengthwise cable segments;
• and
• performing a final tensioning of the lengthwise cable segments;
• and
• filling the voids with concrete thereby surrounding respective joined lengthwise cable segments disposed therein with concrete.