3» BUILDINGS AND ROADS 



BUILDINGS AND BOADS. 



Lime absorbs water, or water may be added, when it is 

 called slaked lime. 



A para of lime is the quantity contained in a box 22 inches 

 square and 10 inches deep (inside measurements), and is thus 

 approximately 2 '8 cubic feet. It weighs 60 lb. 

 2 paras = 1 salagai. 



A cartload of lime will be from 10 to 12 paras, i.e., about 

 30 cubic feet. When slaked this will occupy about twice the 

 space, i.e., 60 cubic feet. 



Mortar for concrete : — 1 part of lime to 3 of sand : 'for 

 building and plastering : 1 part of lime to 2 of sand. 



The volume of mortar is equal to the volume of sand 

 used : thus 10 paras of sand + 5 paras of lime will give 

 10 paras of mortar. Twelve paras of mortar will be required 

 for building 100 cubic feet of brick in mortar. 



Bricks. 



Table moulded bricks :— 9" X 4* X 2£ r . 

 Country bricks :— 8" X 4£" X 2£\ 



For 100 cubic feet of building 1,200—1,300 table moulded 

 bricks are wanted, or 1,500—1,700 country bricks. 



One cartload of bricks contains 300 table moulded or 

 430 country bricks. 



Four masons, with four women to assist, will build 

 100 cubic feet of straight wall in a day : if scaffolding is 

 necessary, the figure may drop to 60 "cubic feet. 



Surki concrete : — 2 parts of mortar to 4 or 5 parts of 

 broken bricks. 



One woman will break § cubic yard of bricks for concrete 

 in a day. 



One mason, with a woman to help, will rough plaster 

 150 square feet in a day. If the work is properly finished 

 100 square feet only will be done 



