Cement Floors and Walks. 383 



and should be thoroughly rammed until the fine cement 

 shows as a layer on the surface. After standing a short 

 time, but before the concrete has set, the finishing surface 

 should be applied and thoroughly troweled until it is even 

 and smooth. Fig. 177 is a cross section of floor and 

 mangers. 



FIG. 177. Shows cross-section of cement stable floor with mangers and 



gutters. 



For a cellar or creamery floor, where it is desired to have 

 a fine smooth surface, easily cleaned, after troweling, it 

 may be wet with a whitewash brush and some pure dry ce- 

 ment sprinkled over, which is troweled until it is hard, 

 smooth and glossy. 



When the second series of blocks in a given, tier is made 

 and the surface finished it is necessary to cut through the 

 finishing layer exactly above the joint in the concrete, to 

 prevent cracking, and then neatly round the joint. 



474. Cost of Materials for Cement Floor. Taking mater- 

 ials at the prices given and the concrete 4 inches thick, 

 made in the proportions of (469) the cost per 100 square 

 feet of floor, and the amount of materials will be as given 

 in the table below : 



The floor made of wood 2 inches thick, laid upon 2x6's, 

 16 inches from center to center, would cost $4.12 or $4.95 

 per 100 square feet when the price is $15 or $18 per thou- 

 sand. This makes the concrete 99 cents per 100 square 

 feet more than the lumber, comparing the lowest prices in 

 each case, and $1.72 more, comparing the higher prices. 



