CONCRETE CONSTRUCTION. 



231 



853. A sidewalk 60 feet long, 4 feet wide and 4 inches 

 thick is to be constructed. Calculate the number of cubic 

 yards of cinders, required to make a 12-inch foundation? 

 Six-inch foundation? 



854. How many cubic yards of concrete are required 

 for the sidewalk in the preceding problem? How much 

 finish is required for a finishing coat 1 inch thick? 



CONSTRUCTED OF CONCRETE THROUGHOUT. 



Not only the foundations, but the floors, walls and other parts of this house 

 are made of concrete. Even the clapboard effect on the second story was made 

 by placing mortar over the concrete and lining it off to represent wood. The 

 interior of the house, also, is concrete. 



855. How much concrete required to build a watering 

 trough having its walls 4 inches thick and the inside 

 dimensions as follows: Length 8 feet, width 18 inches, 

 depth 12 inches. 



856. How much concrete is required to make 50 posts 



