The power house is provided with the following traveling cranes: For
the operating room: One 60-ton electric traveling crane and one 25-ton
electric traveling crane. For the area over the oil switches: one
10-ton hand-operated crane. For the center aisle of the boiler room:
one 10-ton hand-operated crane. The span of both of the electric
cranes is 74 feet 4 inches and both cranes operate over the entire
length of the structure.

The 60-ton crane has two trolleys, each with a lifting capacity, for
regular load, of 50 tons. Each trolley is also provided with an
auxiliary hoist of 10 tons capacity. When loaded, the crane can
operate at the following speeds: Bridge, 200 feet per minute;
trolley, 100 feet per minute; main hoist, 10 feet per minute; and
auxiliary hoist, 30 feet per minute. The 25-ton crane is provided with
one trolley, having a lifting capacity, for regular load, of 25 tons,
together with auxiliary hoist of 5 tons. When loaded, the crane can
operate at the following speeds: bridge, 250 feet per minute; trolley,
100 feet per minute; main hoist, 12 feet per minute; and auxiliary
hoist, 28 feet per minute.

The power house is provided with an extensive tool equipment for a
repair and machine shop, which is located on the main gallery at the
northerly side of the operating room.

[Illustration: 5,000 K. W. ALTERNATOR--MAIN POWER HOUSE]




CHAPTER V