2868                                                LAWS OF MARYLAND                         [Ch. 864

7-407.

(b) If a designated escapeway is a shaft:

(1)    It shall be equipped with hoist and cage, or
with travelable stairways or ladders. A shaft sunk more
than 30 feet deep may not be equipped with ladders.

(2)   Stairways shall be of substantial construction,
set at an angle not greater than 45° from the horizontal
and equipped on at least one side with a suitable
handrail. Landing platforms shall be at least [two] 2
feet wide and [four] 4 feet long and railed properly.

(3)   Ladders shall be anchored securely.

(4)   If ladders, or stairways are installed in an
angle greater than 45°, their use may be continued
provided they are of substantial construction, with
platforms at intervals of not more than 30 feet and
equipped with a handrail in the case of stairways. If a
designated escapeway is a slope of not more than 45°, it
shall be equipped with a stairway or adequate walkway
with cleats. If the slope is more than 45°, stairways
shall be installed. Direction signs shall be posted
conspicuously to indicate mainways and designated
escapeways.

7-416.

(k) At the bottom of each hoisting shaft and at
intermediate landings, a "run—around" shall be provided
for safe passage from one side of the shaft to the other.
This passageway may not be less than [five] 5 feet in
height and [three] 3 feet in width.

7-418.

(g) (1) Shelter holes shall be provided along
haulage entries driven where locomotive, rope, or shuttle
car haulage is used. They shall be spaced not more than
80 feet apart. Except where the trolley wire is six and
one-half feet or more above the rail, or guarded
effectively at the shelter holes, the holes shall be on
the side of the entry opposite the trolley wires.

(2)   Shelter holes shall be at least [five] 5 feet
in depth, not more than [four] 4 feet in width, and [six]
6 feet in height or as high as the traveling space, if
the traveling space is less than [six] 6 feet high. Room
necks and crosscuts may be used as shelter holes even
though their width exceeds [four] 4 feet.

(3)   Shelter holes shall be kept clear of refuse and