COST DATA 365 



influenced by the amount of experience local carpenters have 

 had in this class of work. 



In assuming approximate unit prices for reinforced con- 

 crete, it is customary to include in the estimate the cost of 

 the forms; thus, the cost of reinforced-concrete floor and 

 wall construction per cubic yard will usually be between 

 $16 and $20. This price includes the steel reinforcement, 

 the cost of the labor on the forms, and the cost of the con- 

 crete. This cost per cubic yard increases as the thickness 

 of the wall decreases. 



The cost of reinforced-concrete floor systems can be 

 estimated at a square foot. The total cost per square foot 

 of floor, including the steel reinforcement, form work, etc., 

 will usually be found to vary between 60 and 65 cents. 



It must be understood that the preceding figures are 

 subject to considerable changes in different sections of the 

 country. They indicate only that such costs can be obtained 

 fairly accurately for certain localities, for a period of 1 or 

 2yr. 



Sometimes the cost of a building is estimated per square 

 foot of floor surface, this cost including also the cost of the 

 walls, etc. Thus, if it costs in a certain locality $1.50 per 

 square foot of floor to build a concrete mill building, the 

 approximate cost on a proposed building two stories high, 

 50 ft. wide, and 200 ft. long, can be found as follows: 

 The floor space on each floor is 200 X 50 = 10,000 sq. ft. For 

 the two floors, the surface is 20,000 sq. ft., and at $1.50 per 

 square foot, the price is 20,000 X $1.50 = $30,000. This cost 

 is for the building complete. It includes ordinary plumbing, 

 painting, etc., such as would be necessary for a factory 

 building. If the building were more ornamental, the unit 

 cost would be taken higher at perhaps $2 per square foot, 

 or whatever the current figures in the same locality hap- 

 pened to be. 



In making an exact estimate of a reinforced-concrete 

 building, the following suggestions will be of interest: 



The principal steel reinforcement is carefully estimated. 

 For most styles of patented bars or round and square bars, 

 the manufacturers give weights that correspond to various 



