294 FAEM BUILDINGS IN SOUTH AFBICA 



cement, to one part sand, to three parts metal as described for lintels, 

 mixed as for floors. 



Lime Mortar. — To be composed of one part lime to three parts sand 

 well mixed together, with a sufficient quantity of clean water, on a 

 non-absorbent platform. 



Cement Mortar. — To be composed of one part of cement to three parts 

 of sand, unless otherwise specified, well mixed together, with a sufficient 

 quantity of clean water, on a non-absorbent platform. 



To be mixed in small quantities, as no cement that has commenced to 

 set will be allowed to be used. 



Damp Course. — To be asphaltic felt sheeting of approved quality. 



Bricks. — To be good, hard, sound, well- burnt local bricks, uniform in 

 size, and the best procurable in the district. 



Facing Bricks. — To be as above described, but specially picked for 

 shape, size, and colour. 



CONCRETOR AND BRICKLAYER 



Work to be Done 



Concrete Work Generally. — Special attention must be paid to the 

 following points : — 



(1) The quality and mixing of the materials. 



(2) The depositing of the concrete in place, and thorough punning to 

 ensure solidity and freedom from voids. 



(3) In all cases the concrete should be mixed in small quantities, 

 sufficient for the particular section or area to be laid in one operation, 

 which should be performed as quickly as possible. 



(4) Where work has to be recommenced on, or adjacent to, any 

 previously laid surface, such adjacent surface is to be thoroughly wetted 

 with clean water, or, if it has set hard, it must be hacked off, swept clean, 

 and covered with cement grout. 



(5) The concrete, when laid, must be shielded against too rapid drying 

 from exposure to the sun's rays or wind, and kept damp for at least 

 fourteen days, with wet sacking. 



(6) All shaking and jarring must be avoided. 



Hard Core. — Under concrete granolithic floor lay 6 inches of hard-core 

 well-rammed, sloped, and stepped for manure channels. 



Granolithic Floor. — The floor throughout the cow byre is to be laid to 



