=20.= In determining the cost of =cement cellar floors=, the concrete
proper and the top coat should be considered separately. The concrete
proper is usually reckoned by the cubic yard. About 1 hour more is
required to lay a cubic yard of floor than is necessary for plain
concrete work. Therefore, in estimating, 25 cents per cubic yard, or
the wages of a laborer for 1 hour, must be added to the figures given
in Table II. A 1-3-6 mixture is generally used. For stone concrete,
then, the cost of the concrete proper for a cement cellar floor would
be $5.17 per cubic yard, exclusive of the cost of supervision and the
builder’s profit.
An analysis of the cost per square yard of top coat 1 inch thick for a
cement cellar floor is as follows:
Cost
Cents
¼ hour, plasterer’s time, at 45 cents per hour 11¼
¼ hour, laborer’s time, at 25 cents per hour 6¼
¹/₁₅ barrel of cement, at $2 per barrel 13⅓
⅛ barrel of white sand, at 75 cents per barrel 9⅜
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Approximate cost per square yard 40
To the foregoing should be added the cost of supervision and builder’s
profit.