Sidewalk sheds required. Whenever any structure or
part thereof within 10 feet of the street line is to be erected or
raised to exceed 30 feet, two stories, in height or whenever such
a structure more than 25 feet in height is to be demolished, the owner
or the person doing or causing such work to be done shall erect and
maintain, during such work, a substantial shed over the sidewalk in
front of said structure and extending, so far as practicable, from
the building line to the curb. On streets 50 feet or less in width
and on streets having sidewalks less than 15 feet in width, such sheds
may extend beyond the curb to such extent as may, on the recommendation
of the Superintendent of Buildings, be approved by the Village Board
of Trustees, provided that when such sheds extend to within 15 feet
of the opposite building line, the written approval of the lessees,
tenants or occupants of the two stories or parts of stories next above
the curb of the structures along the opposite building line shall
have been obtained before such approval is issued. Such shed shall
remain in place until the structure is enclosed or, in case of demolition,
until the structure has been reduced to 20 feet in height. Every such
shed shall be kept properly lighted at night.