2018 international residential code.
Ibc attic definition.
Openings for ventilation having a least dimension of not less than 1 16 inch 1 6 mm and not more than 1 4 inch 6 4 mm shall be permitted.
The international building code commentary often provides clarification and the intent of code provisions.
This section states that intake and exhaust vents shall be completed in accordance with section 1203 2 of the ibc.
The code official is wrong imo.
The habitable attic was added in the 2009 addition in an attempt to gain bonus space above the 3d floor while remaining in the irc.
Attic or storyfrom the 2006 ibc commentaryattic.
Openings for ventilation having a least dimension larger.
Attic section 202 identifies an attic as that space between the ceiling beams at the top story and the roof rafters.
The ibc provides definitions in chapter 2 of terms that are generally used in a number of varied locations throughout the code.
1 foot 304 8 mm 1 square foot 0 0929 m 2.
Unless otherwise required in accordance with the international wildland urban interface code or due to the location of the building within a fire district in accordance with appendix d.
2018 international building code.
In addition there are.
See chapter 10 means of egress particularly 1011 12 stairway to roof 1011 12 2 roof access and 1011 16 ladders.
The space between the ceiling beams of the top story and the roof rafters.
On the upcodes website.
It is the opinion of rci that the lack of such provisions in the 2015 ibc will increase the probability of roof collapses.
Section 1203 attic spaces is defined in chapter 12 interior environment.
A code provision sometimes overlooked is in the definitions in chapter 2 of the 2015 ibc.
Nonclassified roof coverings shall be permitted on buildings of group r 3 and group u occupancies where there is a minimum fire separation distance of 6.
Chapter 9 roof assemblies.
The definition of attic identifies the specific portion of a building or structure for the purposes of determining the applicability of requirements that are specific to at tics such as ventilation see section 1202 and draftstopping see section 716.
Exterior openings into the attic space of any building intended for human occupancy shall be protected to prevent the entry of birds squirrels rodents snakes and other similar creatures.
Chapter 15 roof assemblies and rooftop structures of the ibc identifies roof ventilation under section 1503 5 roof ventilation.
Exception 1 allows you to only ventilate 1 300 th of the attic area if 50 to 80 of the ventilation occurs at least 3 above eave or cornice vents.
The residential code applies to dwellings not more than three stories above grade plane which is what you have plus what appears to be a habitable attic if you chose to use the space as such.
