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2027 International Building Code

Chapter 12Interior Environment

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Question 1 1.

Which of the following occupancies or facility types is specifically required to be ventilated by mechanical means in accordance with Section 407 of the International Mechanical Code?

Question 2 2.

In enclosed attics and rafter spaces where ceilings are applied directly to the underside of roof framing members, what is the minimum clear airspace required between the insulation and the roof sheathing?

Question 3 3.

When reducing the net free cross-ventilation area of an enclosed attic to 1/300, what vertical distance below the ridge or highest point of the space must the upper ventilators be located within?

Question 4 4.

Exterior ventilation openings into the attic space of a building intended for human occupancy are permitted to have openings without wire cloth screening provided their least dimension is not less than 1/16 inch and not more than what dimension?

Question 5 5.

When using a vapor diffusion port in an unvented attic with air-permeable insulation in Climate Zones 1, 2, and 3, what is the maximum vertical distance allowed from the highest point of the roof to the lower edge of the port?

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