| |-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| BENDING LARGE BEAMS _Apparatus_: A static bending machine (described above), with a special crosshead for third-point loading and a long platform bearing knife-edge supports, is required.

(See Fig.

29.) [Illustration: FIG.

29 .-- Static bending test on large beam.

Note arrangement of wire and scale for measuring deflection; also method of applying load at "third-points."] _Preparing the material_: Standard sizes and grades of beams and timbers in common use are employed.