Sec. 4-Fig. 36
DERRICKS, CRANES, ETC., ON THEIR OWN WHEELS, WITH BOOMS ATTACHED, WHEN LENGTH OF BOOM
DOES NOT EXCEED 30 FT. BEYOND END SILL OF THE CAR ON WHICH THE MACHINE IS MOUNTED
Item No. of Pcs.
Description
A
Brake wheel clearance. See Fig. 2, Sec. 1.
B
1
Hardwood 10 in. wide, high enough to keep Boom 4 in. from floor. Secure to floor with four 3/4
in. bolts.
C
4
4 in. x 4 in. x 18 in., hardwood cleats, or plates 1/2 in. x 4 in. x 18 in.
D
2
6 in. x 6 in. x 3/8 in. x 10 in. angles, or 8 in. x 8 in. x 24 in., hardwood blocks. Clearance
between boom and angles, or boom and blocks, must be at least 3 in.
E
2
Straps, wrought iron, 1/2 in. x 2 in., formed to suit.
F
Uncoupling mechanism must be made inoperative.
G
Spacing blocks to be applied after draft gears have been fully compressed and slack taken out
by jacking cars apart.
H
Item "B" must be located not more than 25 ft. from point where boom Is attached to body of
derrick.
J
When this distance exceeds 30 ft., be governed by Fig. 37.
K
2 ea. Item "D".
34 in. dia. bolts, through Items "B", "C", "D", and "E".
Rotating portion of derrick must be free to swing without any impediment.
All coal must be removed from bunkers. Water, must be removed from boiler and reservoir.
Boom end of crane must trail.
See General Rules 4, 5, 9, 14, 15, 16, 19, 19A and 21 for further details.
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