(a) there must be a clearance of at least 150 mm under the lowest live part of the platforms;
(b) the floor between load cell supports must be of concrete at least 75 mm thick and must be effectively drained and kept free from any accumulation of water, mud and debris;
(c) there must be in the same plane as, or lower than, the floor a clear space of at least 1 metre from the external edges of the frame; and
(d) the load cell footings must be individually and mutually stable.