|
72
<br />GENERAL ORDINANCES 285
<br />Sec. 494(12). Repairing frame building within con-
<br />gested fire limits.
<br />Any existing frame building within the congested fire limits,
<br />which may hereafter be damaged by fire, decay, or otherwise to
<br />an amount greater than one-half of its present value, exclusive
<br />of the foundation shall not be repaired or rebuilt, but shall be
<br />removed.
<br />No building shall be altered or remodeled for use as an apart-
<br />ment if same contains more than five apartments unless same
<br />be of fireproof construction.
<br />Sec. 494 (13). What buildings required to be $reproof.
<br />(a) All buildings erected, altered or remodeled, for the use
<br />of a public garage, coffee roaster, bakeries, dry cleaning estab-
<br />lishment, laundries, theatres, schools if over one story and base-
<br />ment in height, hotels if over two stories and basement in height,
<br />within the fire limits shall be of fire proof construction.
<br />(b) All buildings over 55 ft. or four stories in height shall be
<br />of fire proof construction, except that this shall not apply to
<br />domes, towers, or spires of churches or of other public buildings.
<br />(c) All buildings designed for use as tenements and apart-
<br />ments if containing more than five apartments and if more than
<br />two stories and basement in height.
<br />Sec. 494(14). Mill building and factory construction.
<br />Factory and mill buildings of any type over one story in height
<br />shall be constructed in accordance with mill construction or slow -
<br />burning construction as defined by the National Board of Fire
<br />Underwriters.
<br />Sec. 494(15). Limits of height and area.
<br />(a) Except as specified in subsection 31 of this section, no
<br />building hereafter erected within the corporate limits, having
<br />walls of hollow terra cotta or concrete blocks, shall exceed three
<br />stories, or forty (40) feet in height.
<br />(b) The floor area between fire walls of non -fireproof build-
<br />ings shall not exceed the following: When fronting on one
<br />street, 5,000 square feet; when fronting on two streets, 6,000
<br />square feet, and when fronting on three streets, 7,500 square
<br />286 CHARLOTTESVILLE CITY CODE
<br />feet. These area limits may be increased under the following
<br />conditions as indicated:
<br />For non -fireproof buildings, fully equipped with approved
<br />automatic sprinklers, 662/37e.
<br />For fireproof buildings, not exceeding 125 feet in height,
<br />50°fo.
<br />For fireproof buildings not exceeding 125 feet in height fully
<br />equipped with approved automatic sprinklers, 1007o'.
<br />Sec. 494(16). Walls.
<br />For the purpose of determining wall thickness as specified in
<br />this subsection basements and subbasements shall be considered
<br />as stories.
<br />(a) The exterior or division walls of all buildings hereafter
<br />erected within the corporate limits shall be of sufficient thickness
<br />to support the load to be carried; but in no case shall a brick,
<br />stone, concrete, or hollow block wall be less than twelve (12 )
<br />inches thick except panel walls, non -load bearing and in dwelling
<br />house class.
<br />(b) Walls, for warehouse class only (excepting party and
<br />fire -walls, for all buildings of other than the dwelling house
<br />class) not exceeding four stories or fifty-five (55) feet in height,
<br />shall have the upper two stories not less than twelve (12) inches
<br />thick, increasing four (4) inches in thickness for each two
<br />stories or fraction thereof below.
<br />(c) For all walls of buildings of the dwelling house class the
<br />upper two stories shall be not less than eight (8) inches thick,
<br />increasing four (4) inches in thickness for each two stories or
<br />fraction thereof below, excepting that gable walls shall not ne-
<br />cessitate an increase in wall thickness.
<br />(d) Panel walls in skeleton construction must be of masonry
<br />laid in cement mortar or masonry cement if approved and shall
<br />be at least 8" thick where the vertical distance between girders
<br />does not exceed 10 ft. and shall be increased 4" for each ten foot
<br />or fraction thereof that the said vertical distance exceeds ten
<br />f Got.
<br />Curtain walls must be of masonry laid in cement mortar or
<br />masonry cement mortar if approved and shall be not less than
<br />12" thick, increased 4" for every additional section of 3 stories
<br />GENERAL ORDINANCES 287
<br />or 45 ft. They shall be anchored to the framing at each floor
<br />level, anchors spaced not more than 6 ft. apart horizontally.
<br />(e) In all buildings except dwellings, frame buildings, and
<br />skeleton construction, party walls and fire walls which serve as
<br />bearing walls on both sides, shall be not less than sixteen (16)
<br />inches thick in the upper two stories or upper thirty (30) feet,
<br />increasing four (4) inches in thickness for each two stories or
<br />fraction thereof below. All other fire walls shall be not less than
<br />twelve (12) inches thick in the upper four stories for upper
<br />fifty feet, increasing four (4) inches in thickness for each two
<br />stories or fraction thereof below. Portland Cement Mortar or
<br />approved Masonry Cement ,Mortar only shall be used in such
<br />walls.
<br />(f) Reinforced stone or gravel concrete walls, with the steel
<br />reinforcement running both horizontally and vertically and weigh-
<br />ing not less than one-half (%) pound per square foot of wall,
<br />may have a thickness four (4) inches less than that prescribed
<br />for brick walls.
<br />(g) Walls built of rubber stone shall be increased 1/3 in. in
<br />thickness over that required for brick walls under similar con-
<br />ditions.
<br />(h) All exterior and division walls over one story high, ex-
<br />cepting such walls that face on a street and are finished with
<br />incombustible cornices, gutters, or crown mouldings, the walls
<br />of detached dwellings with peaked or hipped roofs, shall extend
<br />the full thickness of the top story to at least three foot above
<br />the roof at all points, except that on dwellings the parapets may
<br />be reduced to two foot and in all cases shall be properly coped.
<br />This paragraph does not apply to division walls in fire proof
<br />buildings.
<br />(i) Hollow building blocks may be used for masonry walls
<br />excepting party and fire walls and shall be of sufficient strength
<br />to safely carry the loads imposed upon them. The specification
<br />and method of computing this strength of hollow building blocks
<br />shall be in accordance with the requirements established by the
<br />National Board of Fire Underwriters.
<br />(j) All walls and partitions in schools, hospitals and places of
<br />public assemblage, over one story high, and all walls and parti-
<br />tions in theatres, shall hereafter be built of brick, stone, hollow
<br />288 CHARLOTTESVILLE CITY CODE
<br />or solid blocks, or metal lath and Portland Cement plaster on
<br />metal studding, or other equivalent incombustible construction.
<br />Sec. 494(17). Concrete construction.
<br />Concrete for reinforced concrete construction shall consist of
<br />a wet mixture of one part of Portland Cement to not more than
<br />six parts of aggregate, fine and coarse, in such proportions as
<br />to produce the greatest density.
<br />The quality of the materials, the design, and the construction
<br />shall be in accordance with the best engineering practice.
<br />Sec. 494 (18) . Steel construction.
<br />Where structural steel is used in construction it shall be in ac-
<br />cordance with the latest regulation of the American Institute of
<br />Steel Construction.
<br />Sec. 494(19). Protection of ends of wooden beams.
<br />The ends of all floor, ceiling, or roof beams, entering a party
<br />or fire wall from opposite sides, shall be separated by at least
<br />six (6) inches of solid masonry. Such separation may be ob-
<br />tained by corbeling the wall, or staggering the beams, or the
<br />beams may be supported by steel wall hangers, but no wall shall
<br />be corbeled more than two (2) inches for this purpose. The
<br />ends of the wooden beams which enter walls shall be cut to a
<br />bevel to make them self -releasing.
<br />Sec. 494(20). Protection of wall openings.
<br />(a) If the opening be in a party or fire wall it shall have a
<br />standard automatic fire door on each side of the wall. If an
<br />opening in a fire wall is made to serve as an emergency exit, it
<br />shall not exceed forty-eight (48) square feet in area, and a self-
<br />closing door shall be substituted for one of the automatic fire
<br />doors.
<br />(b) Every building within the congested fire limits except
<br />dwellings shall have standard fire doors and standard fire win-
<br />dows on every exterior opening except when fronting on street
<br />not less than 30 ft. wide or where no other building is or can be
<br />built within 30 ft. of such opening and excepting show windows.
<br />Where glass is used for such openings same shall be wired glass
<br />1
<br />7
<br />_J
<br />1
<br />1
<br />1
<br />
|