Let us apply the formula—
Case I. Given a span of 14 feet,
a breadth of 8 inches,
a depth of 14 inches.
Required the safe load.
The formula
becomes, by substitution,
= 11,666 lbs.
Case II. Given the safety load 18000 lbs.,
the breadth 9 inches,
the length 14 feet.
Required the depth.