In many cases a test should be continued until complete failure results.

The points where the various failures occur are indicated on the stress-strain diagram.

A brief description of the failure is made on the margin of the log sheet, and the form traced on the sketches.
_Disposal of the specimen_: Two one-inch sections are cut from the region of failure to be used in determining the moisture content.

(See MOISTURE DETERMINATION, above.) A two-inch section may be cut for subsequent reference and identification, and possible microscopic study.

The remainder of the beam may be cut into small beams and compression pieces.
_Calculating the results_: The formulae used in calculating the results of tests on large rectangular simple beams loaded at third points of the span are as follows: 0.75 P (1) J = -- ------ b h l (P_{1} + 0.75 W) (2) r = -- ------------------ b h^{2} l (P + 0.75 W) (3) R = -- -------------- b h^{2} P_{1} l^{3} (4) E = -- ------------- 4.7 D b h^{3} 0.87 P_{1} D (5) S = -- ------------ 2 V b, h, l = breadth, height, and span of specimen, inches.
D = total deflection at elastic limit, inches.
P = maximum load, pounds.
P_{1} = load at elastic limit, pounds.
E = modulus of elasticity, pounds per square inch.
r = fibre stress at elastic limit, pounds per sq.