| 摘要 |
A mortar or cement free construction system uses a series of interlocked blocks or bricks 50 55 inclusive which may have shaped profiles at the ends to aid engagement of the blocks, see 21-24 figure 3. Each block has a plurality of through holes passing vertically through each block and spaced laterally to engage with another block on the course above and/or below. Each through hole has a countersunk portion to accept the head of a locking bolt 25. The through hole has the same thread form as the locking bolt. The locking bolt has a female thread in the head. The locking bolts are screwed through the block and the male thread of one bolt engages with the female thread of the bolt located in the lower course of blocks. The bolts are tightened until a shoulder of the bolt head contacts the bottom of the countersunk hole. As an alternative to the use of threaded bolts, a similar threaded stud and nut system can be used instead, see figure 22. |
