SPECIFICATIONS 293 



Facings and Pointings. — All exposed stonework is to be properly 

 squared and hammer dressed, and to have the joints raked out 1 inch 

 deep and pointed in 1 : 2 cement mortar, with a flat joint cut on both 

 edges. 



All salient angles are to be pitched true and plumb without chiselled 

 margins. 



CONCRETOR AND BRICKLAYER 

 Materials to be Used 



Hard Core. — To be composed of broken granite, stone, brick, clinker, 

 or other hard material. 



Metal or Aggregate. — Metal for concrete to be well screened, coarse, 

 clean gravel, or broken stone, and to be free from loam, clayey matter, 

 and other impure mixtures. 



That for concrete lintels to pass, all ways, through a 1-inch ring ; and 

 that for concrete floors to pass all ways through a 2-inch ring. 



Sand. — Sand to be clean, coarse-grained drift sand of approved 

 quality. 



Lime. — Lime to be from an approved kiln, and of approved quality, 

 and to be thoroughly burned. 



Cement. — The cement shall be of an approved brand, and shall be 

 capable of passing the tests specified by the " Engineering Standards 

 Committee." 



Cement Concrete for Floors. — Cement concrete for floors to be composed 

 of one part Portland cement, three parts sand, and six parts metal as 

 described for floors, mixed on a non-absorbent and clean platform, and 

 proper measures are to be used, in proportioning, for holding the specific 

 quantity of each material employed. 



The materials are to be thoroughly well mixed by being turned over 

 twice dry, and water added, and then turned over again until the whole 

 is properly incorporated. 



The water is to be added gradually through a fine rose, no more being 

 used than is absolutely necessary to mix the whole thoroughly. The 

 concrete, after mixing, is to be at once wheeled to the place where it is 

 to be laid, and gently tipped from a height of not more than 2 feet into 

 position, and carefully and steadily rammed. 



Cement Concrete for Lintels. — Is to be composed of one part Portland 



