BRICKWORK 



25 



The usual method adopted in brick-laying is first to build up the 

 bricks at the corners of the building, say to a height of 6 or 7 

 courses, a mason's plumb-rule being used as shown in Fig. 12 to keep 

 the corners truly vertical. For this purpose a plumb-rule is much to 

 be preferred to a spirit-level. The brickwork between these corners 

 can now be quickly laid, by stretching a line from corner to corner, 

 and using it as a guide to keep the face of the wall true. In this 

 way the plumb-rule need only be used on the corners of the build- 

 ing, and the remainder is constructed by the much easier method of 

 building to the line. Having built up the part between, the corners 

 are again advanced, and the process is repeated. 



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■P/iCfCt/YC 3/7CK 



Fig. 12. 



As has already been mentioned when speaking of "settlement," 

 the walls should be raised regularly so that at any one time no part 

 is higher than 4 feet above an adjoining part. Otherwise, when the 

 adjoining part is raised, the amount which it has to settle will 

 probably exceed the amount of residual settlement still to be per- 

 formed by the older part of the wall, by an extent sufficient to give 

 rise to a crack between older and newer parts of the wall. 



Should one part of a wall be unavoidably delayed, the part carried 

 on should be "racked" back in a series of steps, at the end where 

 the new part is to join it. so as to obviate the aforementioned ill 

 effects (see Fig. 12). 



