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§ 1593.61
<br />DWELLING HOUSE CODE
<br />(d) Fixture-unit values for roo f and yard
<br />areas. Twenty-four square feet of roof area
<br />in horizontal projection shall count as 2 fix-
<br />ture units and each 24 square feet of yard
<br />area contributing to the drain shall count
<br />as 1 fixture unit.
<br />110
<br />1593.61 Sizes of soil' and waste piping, build-
<br />ing drains and sewers.
<br />The maximum number of fixture units
<br />that may be connected to a given size of
<br />building sewer, building drain, horizontal
<br />branch, or vertical soil or waste stack, is
<br />given in Table 93D.
<br /> TABLE 93D
<br />PIPE SIZES AND CORRESPONDING FIXTURE-
<br />UNIT LOAD
<br />Maximum Fixture Units that may be
<br />Connected to:
<br /> Building Drain or Sewer Vertical Soil or
<br /> ~/a I/4 ~/z Horizontal Waste Stack
<br /> Inch Inch Inch, Fixture 1 to 3 Stories
<br />Inches Fall Fall Fall Branch In Height
<br />lI/i 3 4
<br />2 21 26 6 10
<br />2~Z 24 31 12 20
<br />3 20* 27* 36* 20* 30**
<br />4 180 216 250 160 240
<br />* Not over two water closets.
<br />* * Not over six water closets.
<br />1593.62 Minimum size of soil and waste
<br />stacks.
<br />(a) Not smaller than largest horizontal
<br />branch. No soil or waste stack shall be
<br />smaller than the largest horizontal branch
<br />connected thereto, except that a 4 x 3 W. C.
<br />connection shall not be considered as a re-
<br />duction in pipe size,
<br />(b) Required in every dwelling, When-
<br />ever floor drains or other plumbing fixtures
<br />are installed in any building intended for
<br />human occupancy, there shall be at least
<br />one stack not less than 3 inches in diameter
<br />extending upward from the building drain
<br />to the outer air, terminating as prescribed
<br />for stack vents in Section 1593.74.
<br />(c) Minimum sizes. No soil stack shall
<br />be less than 3 inches in diameter and no
<br />waste stack shall be less than 1~/z inches in
<br />diameter.
<br />(d) Kitchen-type sink. When the waste
<br />stack or vent receives the discharge of a
<br />kitchen-type sink and also serves as a vent
<br />for fixtures connected to the horizontal por-
<br />tion of the branch served by the waste stack,
<br />the minimum size of the waste stack up to
<br />the highest sink branch connection shall be
<br />two inches in diameter. Above that point,
<br />the size of the stack shall be governed by the
<br />total fixture units vented by the stack.
<br />1593.63 Minimum sizes of underground
<br />building drains.
<br />Building drains or parts thereof installed
<br />underground or below a basement or cellar
<br />floor shall be of pipe not less than 2-inch
<br />diameter, provided further that non-metallic
<br />pipe shall be not less than 4-inch diameter.
<br />1593.64 Offsets in soil o'r waste stacks.
<br />When an offset in a soil or waste stack is
<br />made at an angle greater than 45° to the
<br />vertical and the load on the stack above the
<br />offset is greater than ~/z the allowable load
<br />on the stack given in Table 93D, no horizon-
<br />tal branch shall connect within 2 feet above
<br />or below the offset.
<br />1593.65 Storm drainage.
<br />(a) Collected and drained to storm sewer,
<br />Roofs and paved areas, yards, courts and
<br />open shafts, and every open excavation or
<br />part of a lot or premises where water ac-
<br />cumulates shall be drained into a storm
<br />sewer except as provided in subsection (b)
<br />of this Section. Gutters, drains, leaders, or
<br />downspouts shall not be required for garages,
<br />stables, barns, sheds and garden houses. The
<br />provisions of this Section shall not be inter-
<br />preted to prohibit the construction or main-
<br />tenance of a pool or fountain which is pro-
<br />vided with drainage approved by the Build-
<br />
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<br />Defmitions and Abbreviations
<br />Alteration o f a heating system. A change,
<br />addition or modification of an existing
<br />heating system, or of any part thereof;
<br />replacement of an existing furnace with
<br />a new furnace, substitution of another
<br />furnace for an existing furnace, moving
<br />of an existing furnace, and conversion of
<br />a furnace to the use of a fuel other than
<br />that previously used. See also: Minor
<br />Repairs.
<br />Approved. In accordance with this Dwelling
<br />House Code as determined by the Build-
<br />ing Official, or approved by the Board of
<br />Building Code Appeals, or by any other
<br />authority designated by law or this Dwell-
<br />. ing House Code to give approval.
<br />Area:
<br />- o f a building. The area, taken on a hori-
<br />zontal plane, at the mean grade level,
<br />measured to the center of party walls or
<br />fire walls and to the outside of other walls,
<br />exclusive of uncovered porches, terraces,
<br />and steps.
<br />- drain. A drain installed to collect sur-
<br />face or rain water from an open area.
<br />Floor -. The floor space enclosed by the
<br />interior side of the rough of exterior walls
<br />or fire partitions, or by a combination of
<br />them.
<br />Room -. The floor area of a room meas-
<br />ured inside from rough to rough.
<br />Areaway. An open subsurface space ad-
<br />jacent to abuilding used to admit light or
<br />air or as a means of access to a basement
<br />or cellar.
<br />Attic. See Story: Attic -.
<br />1517.03 Letter "B."
<br />Back fill. The replacement of excavated earth
<br />into a pit or trench or against a structure.
<br />Back flow: The flow of water or other liquids
<br />into the distributing pipes of a potable
<br />supply of water from any source or sources
<br />other than its intended source, including
<br />but not limited to back-siphonage and
<br />flow through across-connection.
<br />-connection. Any arrangement where
<br />backflow can occur.
<br />- preventer. A device or means to pre-
<br />vent backflow into the potable water sys-
<br />tem.
<br />Back-siphonage. The flowing back of con-
<br />taminated or polluted water from a
<br />plumbing fixture or vessel into a water
<br />supply pipe due to a negative pressure
<br />in such pipe.
<br />Back vent. See "Individual vent."
<br />Barometric damper. A device placed in a
<br />smoke pipe, or in a liquid- or solid-fuel-
<br />§ 1517.03
<br />fired appliance connected to a smoke
<br />pipe, which is designed, arranged, and in-
<br />stalled so as to limit the stack action of
<br />a chimney, flue, or smokestack to a pre-
<br />determined maximum draft.
<br />Basement. A space with a floor level 2 feet
<br />or more below adjoining ground, but hav-
<br />ing less than half its clear height below
<br />adjoining ground. Abasement shall be
<br />deemed a story when the ceiling is more
<br />than 4'-6" above adjoining ground. Com-
<br />pare: Cellar.
<br />Beam. A structural member transversely
<br />supporting a load.
<br />Branch: Any part of a plumbing system
<br />other than a main, riser or stack.
<br />- interval. A length of soil or waste stack
<br />corresponding in generalto a story height,
<br />but in no case less than 8 feet, within
<br />which the horizontal branches from one
<br />floor or story are connected to the stack.
<br />- vent, A vent connecting one or more
<br />individual vents with a vent stack or a
<br />stack vent.
<br />Breezeway. A one-story covered passage-
<br />way, open at the side, connecting an ac-
<br />cessory structure to a building or con-
<br />necting two parts of a building.
<br />Bridging. Small wood or metal members
<br />that are inserted, usually in a diagonal
<br />position, between the floor joists for the
<br />purpose of bracing the joists and spread-
<br />ing the effect of loads.
<br />Building: A roofed structure designed or
<br />used for the shelter of persons, animals,
<br />chattels or property of any kind or a com-
<br />bination of such uses.
<br />-area. See Area of a building.
<br />-connection. See Curb connection.
<br />-contractor. Any person performing any
<br />work under contract with the owner or
<br />with any other contractor in the erection,
<br />enlargement, alteration, repairing, mov-
<br />ing or demolition of buildings or other
<br />structures.
<br />-department. The department charged
<br />by law or ordinance with the administra-
<br />tion and enforcement of ordinances and
<br />laws relating to or regulating the erection,
<br />construction, alteration, moving, demoli-
<br />tion, repair and use of buildings, struc-
<br />tures and equipment therefor.
<br />-drain. That part of the lowest hori-
<br />zontal piping of a building drainage sys-
<br />tem which receives the discharge from
<br />soil, waste, or other drainage pipes inside
<br />the walls of the building and conveys it to
<br />the building sewer (house sewer) , which
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