========================+=============+=============================
| Round barn, | Rectangular barn,
| 90 feet in | 36 x 176-3/4 ft.
| diameter +-------------+---------------
| | Plank frame | Mortise frame
------------------------+-------------+-------------+---------------
Lumber in barn, | $1628.48 | $2007.67 | $2497.56
Material in foundation, | 130.35 | 196.80 | 196.80
Material in silo, | 265.00 | 513.52 | 513.52
------------------------+-------------+-------------+---------------
Total cost of material | | |
in barn, | =$2023.83= | =$2717.99= | =$3207.88=
========================+=============+=============+===============
Actual money saved, | | =$694.16= | =$1184.05=
------------------------+-------------+-------------+---------------
Proportional cost, | =100%= | =134%= | =158%=
========================+=============+=============+===============
The square feet of floor space in the round barn 90 feet in diameter and
rectangular barn 36 x 176-3/4 feet are the same, but the cubical content
of the former is more than that of the latter. The increase in the
lumber bill is 23 percent in the plank frame and 53 percent in the
mortise frame barn. The round barn 90 feet in diameter contains 283 and
the rectangular barn 426 lineal feet of wall. The rectangular barn has,
therefore, 50 percent more lineal feet of outside barn wall, requiring a
proportional increase in both paint and foundation.
The smaller surface on the outside wall of the round barn requires less
paint and makes a proportional saving in keeping the round barn painted
in after years.