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The template for the IH60 system is a rectangle as shown below. None of the four sides can be shaped, but in spite of that the template does not have the full symmetry of a rectangle, as can be seen from the half-arrow markings and the dog pattern; it has only an axis of two-fold rotation symmetry. Any tile formed from the template can only be rectangular and its symmetry must be lowered from that of its rectangular shape by appropriate internal decoration.
A translation cluster is
A section of the tiling formed by this template is also shown below, with a translation cluster outlined. The two basic translations are indicated by the vectors drawn from the highlighted cluster. The tiling has four centres of two-fold rotation symmetry, and two axes of mirror and two of glide reflection symmetry. An example of each is indicated. The tiling symmetry group is cmm.
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