Name: Division B: Part 9: Housing and Small Buildings
Author: Guides Team

9.5.1. General

9.5.1.	General
9.5.1.1.	Method of Measurement Unless otherwise indicated herein, dimensions of rooms or spaces shall be measured between finished wall surfaces and between finished floor and ceiling surfaces.
9.5.1.2.	Combination Rooms (See Note A-9.5.1.2.) Two or more areas may be considered as a combination room if the opening between the areas occupies the larger of 3 m² or 40% or more of the area of the wall measured on the side of the dependent area. Where the dependent area is a bedroom, direct passage shall be provided between the two areas.