Deck Egress Width - Building & Construction - DIY Chatroom Home Improvement Forum

 DIY Chatroom Home Improvement Forum deck egress width
 User Name Remember Me? Password
 Register Blogs Articles Rewards Search Today's Posts Mark Forums Read

 Thread Tools Display Modes
06-25-2012, 08:22 AM   #1
011010100110111101100101

Join Date: Jan 2011
Posts: 249
Rewards Points: 160

## deck egress width

On a deck where there is railings (more for design) but no stairs, i.e the opening to the deck is on a cement landing, does the width rule of 36" for a stair tread or landing still apply? I wanted the opening on the deck to the landing to be 31"..

-- Joe

06-25-2012, 01:56 PM   #2
Member

Join Date: Jul 2011
Posts: 1,378
Rewards Points: 500

Ummmm...Can't answer that without more info, but here's some general info on the topic:

Egress widths are based on occupant loading and egress path characteristics. The dimensional requirement for a doorway or flat-surfaced walking surface is calculated by dividing the occupant load by 0.2". For a stair, you divide by 0.3". Simple algebra can give you the equations for amount of people per width of each element.

Example: a 36" wide flat hallway (0.2"/person) can accommodate 180 persons.
Width = People x Surface Factor
36" = People x 0.2"
36"/0.2" = People
180 = People

Minimum widths are typically 34", though that can be reduced provided the length of the reduction is less that 24".

__________________
Life's too short...so enjoy it!

06-26-2012, 09:46 PM   #3
011010100110111101100101

Join Date: Jan 2011
Posts: 249
Rewards Points: 160

Quote:
 Originally Posted by AGWhitehouse Ummmm...Can't answer that without more info, but here's some general info on the topic: Egress widths are based on occupant loading and egress path characteristics. The dimensional requirement for a doorway or flat-surfaced walking surface is calculated by dividing the occupant load by 0.2". For a stair, you divide by 0.3". Simple algebra can give you the equations for amount of people per width of each element. Example: a 36" wide flat hallway (0.2"/person) can accommodate 180 persons. Width = People x Surface Factor 36" = People x 0.2" 36"/0.2" = People 180 = People Minimum widths are typically 34", though that can be reduced provided the length of the reduction is less that 24".
Ok, So. The deck is 20x20. It has a slider into the house.

Now typically, decks are raised and have stairs and hand rails. This deck is under 30", and has no stairs. You simply step off the deck onto the ground.

However, I want railings. If you look at the attached illustration from the deck codes (derived from the IRC) you will see the minimum stair width is 36" (and therefore the opening/egress to the stairs).

On my illustration to the right that I added, you have an opening with no stairs. So my question is, does the 36" rule apply to this opening when no stairs are present, or can the opening be smaller?

-- Joe
Attached Thumbnails

 06-26-2012, 10:16 PM #4 Renovations contractor     Join Date: Oct 2010 Location: Squamish, BC - Canada Posts: 324 Rewards Points: 250 When you say the deck is under 30", do we assume you mean the deck height above grade is under 30" ... How much under? Chances are you still need at least a couple of steps otherwise that's one big single step down. Intrigued as to why you are concerned about the extra 5" for a 20' deck ... I would say make the gap a decent width regardless of minimum code in your area (wherever that is) so that you can get larger items on to the deck easily, for example. Sent from my iPad using DIY Forum __________________ Home Renovations & Repairs ADVENT HOME SOLUTIONS INC Vancouver to Whistler & beyond
06-26-2012, 10:33 PM   #5
011010100110111101100101

Join Date: Jan 2011
Posts: 249
Rewards Points: 160

Quote:
 Originally Posted by Bonzai When you say the deck is under 30", do we assume you mean the deck height above grade is under 30" ... How much under? Chances are you still need at least a couple of steps otherwise that's one big single step down. Intrigued as to why you are concerned about the extra 5" for a 20' deck ... I would say make the gap a decent width regardless of minimum code in your area (wherever that is) so that you can get larger items on to the deck easily, for example. Sent from my iPad using DIY Forum
Deck is under 30" in height, but over 7 3/4", so what I will do is pour a concrete pad so the step off the deck is down about 7", and then finish the grade.

I'm concerned because I put the posts in for the railings, and the decking down, got that inspected and am finishing the railings and now the wife wants the opening in a different spot. I had intended on a 57" opening, and where she wants the new opening is 32" between posts.

-- Joe

 06-27-2012, 12:02 AM #6 Registered User   Join Date: Mar 2009 Posts: 11,730 Rewards Points: 526 Ask your local AHJ. I'm guessing; unless the deck has egress windows from a sleeping room (that require width of egress (36") route) you are able to do whatever you desire. If you have a front door that meets egress requirements, the slider/door (not egress route) is a moot point. One egress door required: http://publicecodes.citation.com/ico...011_par004.htm Egress door, hit "previous" and "next section": http://publicecodes.citation.com/ico...011_par006.htm It does have to comply with "exterior door landings", whether "egress" or not: http://publicecodes.citation.com/ico...011_par006.htm Gary __________________ If any ads are present below my answer or words underlined/colored, I do not condone/support/use the product or services listed/linked to, they are there without my consent. 17,000 dryer fires a year, when did you last clean the inside of the dryer near motor or the exhaust ducting?
06-27-2012, 05:08 AM   #7
011010100110111101100101

Join Date: Jan 2011
Posts: 249
Rewards Points: 160

Quote:
 Originally Posted by GBR in WA Ask your local AHJ. I'm guessing; unless the deck has egress windows from a sleeping room (that require width of egress (36") route) you are able to do whatever you desire. If you have a front door that meets egress requirements, the slider/door (not egress route) is a moot point.
Hi Gary,

I can go see him. I just hate bothering those guys with stuff like this.

Thanks!

-- Joe

 06-27-2012, 06:40 AM #8 Member   Join Date: Jun 2012 Location: Huntersville, NC Posts: 48 Rewards Points: 35 You should be able to look up your local code online. From what my local code book the 30" height has nothing to do with stairs, only the handrail. Unless you are flush with the ground or are less than a single riser you must still meet code for your steps, which includes being min 36" wide. You could just always tell the wife no. But you may find it easier to convince your inspector.
06-27-2012, 07:15 AM   #9
011010100110111101100101

Join Date: Jan 2011
Posts: 249
Rewards Points: 160

Quote:
 Originally Posted by SeanB You should be able to look up your local code online. From what my local code book the 30" height has nothing to do with stairs, only the handrail. Unless you are flush with the ground or are less than a single riser you must still meet code for your steps, which includes being min 36" wide. You could just always tell the wife no. But you may find it easier to convince your inspector.
The town goes by IRC 2009 if I recall. No amendments or anything.

In my application there is no actual 'steps', Just a deck, and a cement landing.

I guess I'll give him a call.

-- Joe

06-27-2012, 09:20 AM   #10
Member

Join Date: Jul 2011
Posts: 1,378
Rewards Points: 500

(deleted)

__________________
Life's too short...so enjoy it!

Last edited by AGWhitehouse; 06-27-2012 at 09:24 AM.

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are Off Pingbacks are Off Refbacks are Off Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post steven994 Painting 7 06-14-2017 04:56 AM bubbler Building & Construction 1 04-12-2012 03:27 PM cpfullback Building & Construction 0 08-04-2011 11:36 AM Rhizzlebop Building & Construction 9 05-15-2009 11:17 AM

Top of Page | View New Posts