Open coil spring assemblies

An open coil spring assembly, comprising:

• a plurality of rows of open coil springs arranged in a matrix, each of the open coil springs including
• an upper end convolution, a lower end convolution, and a plurality of helical convolutions that extend between the upper end convolution and the lower end convolution, the upper end convolution having a first flattened portion adjacent to the plurality of helical convolutions and located on a first side of the open coil spring, and a second flattened portion adjacent to a terminal end of the open coil spring and located on a second side of the open coil spring opposite the first side, and
• a plurality of upper lacings each connecting one or more of the open coil springs, each of the plurality of upper lacings receiving the first flattened portion of a first open coil spring of a first of the plurality of rows and the second flattened portion of a second open coil spring of a second of the plurality of rows, and each upper lacing extending along a longitudinal axis;
• wherein, the first flattened portion of the first open coil spring is offset and aligned with the second flattened portion of the second open coil spring along the longitudinal axis of the upper lacing, such that the first flattened portion of the first coil spring and the second flattened portion of the second coil spring are adjacent to one another without overlapping when connected with the upper lacing.