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Thread: Low Ceiling or Protruding Object?

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    Sawhorse
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    Low Ceiling or Protruding Object?

    2009 IBC
    Group R-2, college apartment building
    Type B unit [regarding accessibility] dwelling unit

    The dwelling unit ceiling height is 8'.
    The dwelling unit hallway is 3 ft wide and also has a ceiling height of 8 ft. Ductwork, hidden by an enclosure, passes beneath the 8 ft ceiling. The enclosure is 35 inches long, spans the width of the hallway, and has a height of 7 ft. Is this a protruding object? Is this allowed?

    Thanks!


    1003.2 Ceiling height. The means of egress shall have a ceiling height of not less than 7 feet 6 inches.

    Exceptions:

    1. Sloped ceilings in accordance with Section 1208.2.
    2. Ceilings of dwelling units and sleeping units within residential occupancies in accordance with Section 1208.2.
    3. Allowable projections in accordance with Section 1003.3.
    4. - 8. Omitted

    1003.3 Protruding objects. Protruding objects shall comply with the requirements of Sections 1003.3.1 through 1003.3.4.

    1003.3.1 Headroom. Protruding objects are permitted to extend below the minimum ceiling height required by Section 1003.2 provided a minimum headroom of 80 inches (2032 mm) shall be provided for any walking surface, including walks, corridors, aisles and passageways. Not more than 50 percent of the ceiling area of a means of egress shall be reduced in height by protruding objects.

    Exception: Door closers and stops shall not reduce headroom to less than 78 inches (1981 mm).

    A barrier shall be provided where the vertical clearance is less than 80 inches (2032 mm) high. The leading edge of such a barrier shall be located 27 inches (686 mm) maximum above the floor.

    1003.3.2 Post-mounted objects. A free-standing object mounted on a post or pylon shall not overhang that post or pylon more than 4 inches (102 mm) where the lowest point of the leading edge is more than 27 inches (686 mm) and less than 80 inches (2032 mm) above the walking surface. Where a sign or other obstruction is mounted between posts or pylons and the clear distance between the posts or pylons is greater than 12 inches (305 mm), the lowest edge of such sign or obstruction shall be 27 inches (686 mm) maximum or 80 inches (2032 mm) minimum above the finished floor or ground.

    Exception: These requirements shall not apply to sloping portions of handrails between the top and bottom riser of stairs and above the ramp run.

    1003.3.3 Horizontal projections. Structural elements, fixtures or furnishings shall not project horizontally from either side more than 4 inches (102 mm) over any walking surface between the heights of 27 inches (686 mm) and 80 inches (2032 mm) above the walking surface.

    Exception: Handrails are permitted to protrude 41/2 inches (114 mm) from the wall.

    1003.3.4 Clear width. Protruding objects shall not reduce the minimum clear width of accessible routes.


    SECTION 1208 INTERIOR SPACE DIMENSIONS

    1208.1 Minimum room widths.
    Habitable spaces, other than a kitchen, shall not be less than 7 feet (2134 mm) in any plan dimension. Kitchens shall have a clear passageway of not less than 3 feet (914 mm) between counter fronts and appliances or counter fronts and walls.

    1208.2 Minimum ceiling heights.
    Occupiable spaces, habitable spaces and corridors shall have a ceiling height of not less than 7 feet 6 inches (2286 mm). Bathrooms, toilet rooms, kitchens, storage rooms and laundry rooms shall be permitted to have a ceiling height of not less than 7 feet (2134 mm).

    Exceptions:


    1. In one- and two-family dwellings, beams or girders spaced not less than 4 feet (1219 mm) on center and projecting not more than 6 inches (152 mm) below the required ceiling height. 2. If any room in a building has a sloped ceiling, the prescribed ceiling height for the room is required in one-half the area thereof. Any portion of the room measuring less than 5 feet (1524 mm) from the finished floor to the ceiling shall not be included in any computation of the minimum area thereof. 3. Mezzanines constructed in accordance with Section 505.1. 1208.2.1 Furred ceiling. Any room with a furred ceiling shall be required to have the minimum ceiling height in two-thirds of the area thereof, but in no case shall the height of the furred ceiling be less than 7 feet (2134 mm). 1208.3 Room area. Every dwelling unit shall have at least one room that shall have not less than 120 square feet (13.9 m2) of net floor area. Other habitable rooms shall have a net floor area of not less than 70 square feet (6.5 m2).

    Exception:
    Every kitchen in a one- and two-family dwelling shall have not less than 50 square feet (4.64 m2) of gross floor area.

    1208.4 Efficiency dwelling units.
    An efficiency living unit shall conform to the requirements of the code except as modified herein:

    1. The unit shall have a living room of not less than 220 square feet (20.4 m2) of floor area. An additional 100 square feet (9.3 m2) of floor area shall be provided for each occupant of such unit in excess of two. 2. The unit shall be provided with a separate closet. 3. The unit shall be provided with a kitchen sink, cooking appliance and refrigeration facilities, each having a clear working space of not less than 30 inches (762 mm) in front. Light and ventilation conforming to this code shall be provided. 4. The unit shall be provided with a separate bathroom containing a water closet, lavatory and bathtub or shower.
    Last edited by Mech; June 14th, 2013 at 20:49. Reason: Corrected Use Group
    I love making up my own code interpretations, don't you?

    I am a plan submitter, not a plan reviewer.

  2. #2
    Sawhorse
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    Mech,

    You meant Group R-2, ..right?



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  3. #3
    Sawhorse
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    Mech,

    You meant Group R-2, ..right?
    Oops . . . Yes, Group R-2.
    I love making up my own code interpretations, don't you?

    I am a plan submitter, not a plan reviewer.

  4. #4
    Sawhorse mtlogcabin's Avatar
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    Is this a protruding object? Is this allowed?
    No it is not a "Protruding" object it is part of the ceiling. Resize the ductwork to make it fit within the minimum 7'6" ceiling height requirements
    Interesting non-lethal, yet legal Self Defense Products available on the market. Feel free to check out this web page , then share with family/friends.
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    Appears to be less than the 50% required for headroom, yes it would work

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    Sawhorse
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    I agree with Kilitact
    (PE)ach
    some days are just that..

  7. #7
    Sawhorse
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    It looks like it works as a furred ceiling...
    Please support Jim Brown, Deputy Building Official from Gillette, Wyoming for ICC Board of Directors.
    My questions and answers are based on some bastardized hodge podge starting with the 2003 I-codes amended by the state of CT in 2005 and 2009 including the 2005 NEC ....and as of today.....The 2011 Connecticut Amendments to the 2009 International Energy Conservation Code portion of the 2005 State Building Code has been posted to the State Building Inspector’s website

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    Sawhorse
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    guess it works as long as a seven footer does not wlak out that door

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    Sawhorse mtlogcabin's Avatar
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    2 questions
    Appears to be less than the 50% required for headroom, yes it would work
    What code sections is the 50% in? I see 2/3 permitted.
    It looks like it works as a furred ceiling...
    no definition so are we talking about a soffit or something similar?
    Interesting non-lethal, yet legal Self Defense Products available on the market. Feel free to check out this web page , then share with family/friends.
    It is nice to know there are some options offered to protect our loved ones. You may also contact via web page link with any questions, or message me.
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  10. #10
    Sawhorse
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    Quote Originally Posted by mtlogcabin View Post
    2 questions What code sections is the 50% in? I see 2/3 permitted.
    1003.3.1 Headroom. Protruding objects are permitted to extend below the minimum ceiling height required by Section 1003.2 provided a minimum headroom of 80 inches (2032 mm) shall be provided for any walking surface, including walks, corridors, aisles and passageways. Not more than 50 percent of the ceiling area of a means of egress shall be reduced in height by protruding objects.

    Exception: Door closers and stops shall not reduce headroom to less than 78 inches (1981 mm).

    A barrier shall be provided where the vertical clearance is less than 80 inches (2032 mm) high. The leading edge of such a barrier shall be located 27 inches (686 mm) maximum above the floor.

    Quote Originally Posted by mtlogcabin View Post
    no definition so are we talking about a soffit or something similar?
    Are you asking for a description of the construction? I am not sure what to call this "thing."
    I love making up my own code interpretations, don't you?

    I am a plan submitter, not a plan reviewer.

  11. #11
    Sawhorse
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    Quote Originally Posted by mtlogcabin View Post
    2 questions What code sections is the 50% in? I see 2/3 permitted. no definition so are we talking about a soffit or something similar?
    Yep...think of a cape style house upstairs with a sloped ceiling, it is allowed to be there, just doesn't count towards habitable space....Similar in IBC....anyone taller than 7' is used to ducking....
    Please support Jim Brown, Deputy Building Official from Gillette, Wyoming for ICC Board of Directors.
    My questions and answers are based on some bastardized hodge podge starting with the 2003 I-codes amended by the state of CT in 2005 and 2009 including the 2005 NEC ....and as of today.....The 2011 Connecticut Amendments to the 2009 International Energy Conservation Code portion of the 2005 State Building Code has been posted to the State Building Inspector’s website

  12. #12
    Sawhorse
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    I guess how do you all get past the fifty per cent since it extends the width of the corridor

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    Sawhorse
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    Quote Originally Posted by cda View Post
    I guess how do you all get past the fifty per cent since it extends the width of the corridor
    50% of the entire hallway.....
    Please support Jim Brown, Deputy Building Official from Gillette, Wyoming for ICC Board of Directors.
    My questions and answers are based on some bastardized hodge podge starting with the 2003 I-codes amended by the state of CT in 2005 and 2009 including the 2005 NEC ....and as of today.....The 2011 Connecticut Amendments to the 2009 International Energy Conservation Code portion of the 2005 State Building Code has been posted to the State Building Inspector’s website

  14. #14
    Sawhorse
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    Not more than 50 percent of the ceiling area of a means of egress shall be reduced in height by protruding objects.

    So is it saying I can have half of my ceiling at four foot level or less or more ???

  15. #15
    Sawhorse
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    So is it saying I can have half of my ceiling at four foot level or less or more ???
    No. See 1003.3.1. It limits minimum headroom to 80".

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    Quote Originally Posted by cda View Post
    Not more than 50 percent of the ceiling area of a means of egress shall be reduced in height by protruding objects.

    So is it saying I can have half of my ceiling at four foot level or less or more ???
    No, 80" minimum ceiling height

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