Pl.: Suspensurae

The floor supported by the pilae as part of the hypocaust. This ‘suspended floor’ usually consisted of (from bottom to top): a layer of bipedales, a thick layer of waterproof mortar, a thin layer of mortar, and a marble or mosaic revetment. The total thickness could vary between 30 and 50 cm. Alternatively, the lower part of the suspensura could be made of brick arches that spanned the space between the pilae.