ECKERD KOBER AND CHRJSTOPH JACOB Hebel AG, Germany.
The use of larger units is well known to improve the productivity of laying. Thin layer mortar further improves economy. Two Hebel units are large format blocks (8/m2) and Jumbo blocks 998 x 623 or 498 mm high x the appropriate wall thickness. The latter are laid by two men using a mini-crane. Some data on productivity are given.