International Residential Code for One- and Two-family Dwellings
When it comes to the standard size of a front door for a residential home, we must sympathise that the International Residential Code (IRC) outlines the requirements for the minimum door size of a domicile used for exiting.
The minimum size of an egress door for a residential dwelling is constitute in Department R311 of the International Residential Code (IRC).
Information technology is important to annotation that the International Residential Code (IRC) applies to detached one-and-two family dwellings and townhouses not more than three stories above grade plane in height with a separate means of egress and their accessory structures not more than than iii stories above class plane in height.
To learn the deviation between the International Residential Code (IRC) and the International Building Lawmaking (IBC), be sure to check out this Mail service .
So lets get into what the residential egress door requirements are in accord with the International Residential Code (IRC).
Residential Means of Egress
Egress Door
Section R311.1 of the IRC states that dwellings must exist provided with a ways of egress that has a continuous and unobstructed path of travel, both vertically and horizontally from all portions of the house to the required egress door.
This path of egress travel cannot get through a garage and the required egress door must open up straight into a public style or to a 1000 or court that opens to a public way.
How Many Egress Doors are Required in a Home?
Section R311.ii states that at least i egress door must be provided for each dwelling unit of measurement. For example, a single family home requires at least one egress door and for a duplex, each unit must provide at least one egress door.
This egress door leading to the exterior is typically used as the front door. Yous tin accept more than 1 egress door, such as a back door to provide an extra level of safety, nonetheless the code only requires a minimum of one door for each dwelling.
See the example below…
Residential Egress Door Requirements
Offset off in order to exist considered an Egress Door, the door must be side hinged. And so for case if you lot look back at the floor plan above, the sliding patio door off the back does not count as a required egress door. This is because information technology is not side hinged and instead opens by sliding.
At present fifty-fifty through a sliding patio door does not see the definition of an egress door, information technology might meet the requirements for emergency escape and rescue openings in a chamber when the opening size meets the opening requirements for emergency escape and rescue openings.
Desire to read more about emergency escape and rescue opening? Exist certain to check out this POST .
And so what about the size of the front door?
What is the Standard Size of a Front end Door?
When the front door is considered to be the Egress Door for exiting, it must take a clear width of no less than 32 inches. This dimension is measured between the face up of the door to the stop when the door is open to 90 degrees.
As for the height of an egress door, the opening must not be less than 78 inches where measured from the acme of the threshold to the bottom of the finish.
What Size Door Practise I Need for a 32 inch Opening?
So now y'all know you need a 32 inch opening, but what size door do you need?
Well in social club to reach a 32 inch opening, you will need at least a 36 inch door. Based on how you measure the opening shown above, a 32 inch door does NOT provide a 32 inch opening. You lot must install at least a 36 inch door to achieve a 32 inch opening.
Once you take the thickness of the door, the thickness of the door stop, and the allowance for the hinges, you are left with the clear opening. This is why y'all demand a 36 inch door to achieve a minimum 32 inch clear width opening.
What are Standard Interior Door Sizes?
So what about interior doors? Any requirements?
The just thing the code says in regards to interior doors or other non-egress doors is that other doors are note required to comply with the minimum dimensions outlined for egress doors. Pregnant that in that location is no minimum dimension for other doors within a residential dwelling unit of measurement.
Even though there is non a minimum requirement for interior doors within this section or anywhere else in the residential code, common sense and all-time practices should be used when selecting an interior door of any size.
Remember what was said at the beginning, a continuous ways of egress travel shall be provided throughout all portions of the habitation to the required egress door for safe exiting. Therefore even with no minimum requirement for interior doors, consideration of the path of travel must be fabricated when choosing an interior door.
Summary of Residential Egress Door Size
So this basically sums up the basic code requirements for residential egress door sizes. Therefore allow usa recap the requirements:
- Residential dwellings must exist provided with a path of travel from all portions of the firm to the egress door.
- At to the lowest degree ane egress door must be provided for each habitation unit.
- An egress door must have a clear width of no less than 32 inches and a articulate height of no less than 78 inches.
- The clear width dimension is measured betwixt the face up of the door to the door stop when the door is open to ninety degrees.
- To achieve a 32 inch opening, y'all volition need at least a 36 inch door.
- There is no minimum dimension required for other doors inside a residential dwelling unit.
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* Reference Source – 2018 International Residential Code – [Buy on Amazon]
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Source: https://buildingcodetrainer.com/front-door-size-residential-egress/
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