65. The foundation walls are built of rubble masonry to the sill at the grade line, and from this sill to the water-table they are built of ashlar with rubble backing, excepting those portions behind porches which are wholly rubble. The estimate for stonework also includes the concrete for footings and cellar floor; the number of cubic feet of concrete required for the footings will be found by referring to the item "Excavation for Footings."

Rubble Masonry

Quantities.

(External measurements with no deduction for openings.)

Cu. Ft.

Cellar walls, 178' 6' x l'6' x 6' 6"........

1,740.4

Add for extra thickness over 1' 6":

5"X 6' X 6' 6"..............

16.3

1' 2"X10' 6"X 6' 6"........... 79.6

95.9

* Foundation walls for front porch:

74' 6" X /' 4" X (average thickness) 2' 6".....

247.7

Foundation for steps:

2 piers, 1' 6" square X 2' 6".......

11.2

2 piers, 2' square X 2' 6"........ 20.0

31.2

Stone footings, under porch foundations, 74' 6"

X 2' 3"x 6".................

83.8

Backing for ashlar and water-table (see "Ashlar "), 78' X 1' X 3'................

234.0

Rubble wall behind porches, 99' 4" X 1' 6" X 3'...

447.0

* Foundation walls rear porch, 27' X 1' 6" X2' 6"..

101.2

Footings, walls rear porch, 27' X 2' 3" X 6"....

30.4

Area walls, 13' 6" X 12" X 6' 6"..........

87.7

Stone footing for area walls, 13' 6" X 18" X 6"...

10.1

Piers, 18"X l8" X 2' 6"X 2............

11.3

Total rubble masonry................

3,120.7

*Although these are made continuous, to carry the base, or ground sill, independent piers under the porch columns might be substituted, at a somewhat less cost.

Cost.

The estimate of cost of the rubble masonry is based on the following analysis:

Cost of 1 Perch of Rubble Masonry.

1 man can lay 3 perches per day; wages being $2.50 per day, 1 perch will cost.........

$0.83

3 laborers are required for 4 masons; wages being $1.5 per day, i perch will cost..............

.38

Stone, delivered at work.............

1.25

1/6 load sand, at $1.50 per load.........

.25

1/2 barrel Rosendale cement, at $1.25 per bbl.....

.63

Total cost of 1 perch............

$3.34

Summary.

From the foregoing calculation, the quantity of rubble masonry is 3,120.7 cu. ft. Taking 25 cu. ft. to 1 perch, 3,120.7÷25 = 124.8 perches, which at $3.34 per perch makes the total cost of rubble masonry............

$416.83