=Transverse Strains.=

Let W = breaking weight in lbs.
" s = constant in table.
" b = breadth in inches.
" d = depth in inches.
" L = length in inches.

Then, for the power of a beam to resist a transverse strain, we shall
have,

4 sbd²
W = ------
L

[TeX: $W = \frac{4 sbd^2}{L}$]

This formula has been derived from experiments made by the most
reliable authorities.

The constant, 1250, adopted for wood in the following formula, is an
average constant, derived from the table, of those woods more commonly
used.

Now to reduce the formula to the most convenient shape for use, we
substitute the value of s, and we have

4 x 1250 bd²
W = ------------,
L