When the arch is built from the arch at the beginning of the direction of the vault to the direction of the arch tiles should be shaped bricks (according to the design requirements in advance purchase) or straight brick processing, the arch of the tilting plane with the arch Radial direction of the same, not with the thickening of the method of mud to get arch arch plane. The dome of each brick should be in line with the radial direction of the arch, and when the last few pieces of brick are to be piled, the final lock bricks should be fitted so that the number of arch bricks should be odd According to the center line of the arch symmetrical evenly distributed; span less than 3 meters of the vault and arch, into a lock brick; span greater than 3 meters of the vault and arch into the three lock bricks (evenly distributed in the arch). Lock the brick into the reserved height for the brick length of 1/3, lock the brick should use the mallet, the use of hammer, the lock brick must be on the board. When the span of a large number of lock brick, should also enter.
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