Compression of wrought-iron columns, lattice, box, and solid web, made at Watertown Arsenal in 1883 and 1884.

This series of tests comprises seventy-four columns made by the Detroit Bridge and Iron Company.

Tabulation of experiments with 3-inch pins in the centre of gravity of cross-section, except those marked N, in which the loading was eccentric. Sufficient bearing area for the pins and flat ends was provided by means of reinforcing plates.

1653 1654

FIG. 230.

FIG. 231.

1

120.20 9-831 297,100 30,220

120-07 10-199 320,000 31,380

180.00 9-977 251,000 25,160
180.00 9.977 210,000 21,050
240.00 9.732 188,600 19,380
240.00 9-762 158,300 16,220

(Deflected perpendicu-
lar to axis of pins.
Sheared rivets in eye-
plates.
Deflected perpendicu-
lar to axis of pins.

Ditto.

Ditto.

Ditto.

240-00 16:077 425,000 26,430

240.00 16-281 367,000 22,540
320-00 16:179 318,800 19,700
320-10 16.141 283,600 | 17,570

(Deflected perpendicu lar to axis of pins.

Ditto.

Ditto.

Ditto.

320.00 17 898 474,000 26,480 (Deflected perpendicu320-00 19-417 491,000 25,290

lar to axis of pins. Ditto.

319.95 16-168 453,000 28,020 (Deflected parallel to

320.00 16-267 454,000 27,910

axis of pins. (Deflected perpendicular to axis of pins.

1651

1652

FIG. 233.

320.00 20-954 540,000 25,770

320-10 20-613 535,000 25,950

(Deflected in diagonal
directions.
(Sheared rivets in eye-
plates.

379

380

167.80 17.01 594,500 34,950 (Buckling plates be

167.80 17.80 633,600 35,595

tween the riveting. Triple flexure.