sentences:  The carriage weighed 3,000 kg (59 cwt).The gun was placed on a wooden platform, consisting of three layers of beams (deals) each measuring 7,5 cm by 7,5 cm by 4,5 m. The size of the platform was 4,5 m by 4,5 m by 22,5 cm.The layers were placed at right angles to one another.