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Which of the following definition below describes a wall opening?
a.
an opening at least 30 inches high and 18 inches wide in any wall or partition.
b.
an opening measuring 12 inches or more in walking or working surface.
c.
any ladder that can be readily moved or carried.
d.
any temporarily elevated platform and its supporting structure.

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Which of the following definition below describes a wall opening?
a.
an opening at lea...
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