Corridor Width

corridor width, egress exit corridor

If your corridor provides access to an exit stair or exit door then it is part of the MEANS OF EGRESS SYSTEM and must meet the requirements of BC Section 1005 and  BC Section 1016.2. The latter tends to be the more strict and therefore governing requirement. However, you still need to demonstrate that your stair complies with both BC Sections.

In addition to the above, your corridor may be required to meet accessibility requirements. (Accessibility requirements are not covered in this post. I will make another post specifically for that later.)

Building Code Section 1005 requirements

You must first calculate the occupant load of the space being served by the corridor.
Then the minimum width of the corridor is calculated by using the appropriate factor from Table 1005.1 (Hint: corridor falls under “other components”.)

OCCUPANT LOAD X 0.2 = MINIMUM WIDTH OF CORRIDOR

Example:  For a space that has an occupancy load of 150 people, 150x 0.2 = 30. Therefore, a minimum corridor width of 30 inches is required.

egress width table

TABLE 1005.1 Egress Width

Building Code Section 1016.2 requirements

Generally, this section requires a minimum corridor width of 44 inches. So if you have an occupant load of less than 220 (44/0.2=220), BC Section 10016.2 will govern over BC Section 1005.1 when it comes to the width of the corridor.

Exceptions to Corridor Width requirement

There are many exceptions to the 44 inch width requirement, some of which even require a width greater than 44 inches, so make sure you take a closer look at BC Section 10016.2 when determining the width of your corridor. In addition, handicap accessibility requirements may impose even more stricter requirements on the corridor width, so you will need to consider that as well.


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