Door Thickness Question

 
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Old 12-21-2010, 08:52 PM   #1
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Door Thickness Question


I am adding 2 bathrooms at a Restaurant in South San Francisco with Handicap Specs. i know the door has to be 36 in. wide by 80 in. tall.

now here is the question:
what would the thickness be? 1 3/8th's or 1 3/4? i know it has to be solid core

thanks
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Old 12-21-2010, 08:54 PM   #2
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Re: Door Thickness Question


It depends if it opening into a rated fire corridor & what the fire rating of the door has to be.

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Old 12-21-2010, 09:07 PM   #3
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Re: Door Thickness Question


^ thanks for the reply.

the blueprint does not specify neither.
the bathrooms are along a hallway that leads to the back door. so would that classify it as a "fire rated" corridor even though it is not an official emergency exit?
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Old 12-21-2010, 09:07 PM   #4
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Re: Door Thickness Question


It may be hard to buy a solid door in anything other than 1 3/4"
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Old 12-21-2010, 09:24 PM   #5
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Re: Door Thickness Question


^ they do make 1 3/8 solid core. i almost bought one at lowes but:

i wasnt sure if it had to be 1 3/8 or 1 3/4?
so i didnt get anything.
keep in mind this is for a restaurant.
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Old 12-21-2010, 09:25 PM   #6
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Re: Door Thickness Question


Quote:
Originally Posted by Alfredo*NorCal View Post
^ thanks for the reply.

the blueprint does not specify neither.
the bathrooms are along a hallway that leads to the back door. so would that classify it as a "fire rated" corridor even though it is not an official emergency exit?
A fire rated corridor is clearly noted on plans.
What material or type jambs are called out?
If there are no specs, I would go with a 1-3/4" door for durability.
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Old 12-21-2010, 09:27 PM   #7
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Re: Door Thickness Question


Commercial will probably be 1 3/4". Standard residential door is 1 3/8". Best to make sure it doesn't need to be a fire rated door.
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Old 12-21-2010, 09:32 PM   #8
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Re: Door Thickness Question


but fire rated doors come with the seal on the bottom but that would not be okay because the bathroom is being built to accommodate handicap people and the floor needs to be even
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Old 12-21-2010, 09:37 PM   #9
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Re: Door Thickness Question


I'm pretty sure that fire code trumps ADA guidelines. Sounds like you're not used to commercial work.

Curious, what sort of trade is "A and F"?
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Old 12-21-2010, 09:37 PM   #10
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Re: Door Thickness Question


Commercial doors meet ada requirments with 1/2" thick thresholds. Also most all commercial steel doors are hallow. Wood doors are the only solid ones. I would ask the architect that designed it. Sounds like you are looking at residential doors.

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Old 12-21-2010, 09:37 PM   #11
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Re: Door Thickness Question


Quote:
Originally Posted by griz View Post
A fire rated corridor is clearly noted on plans.
What material or type jambs are called out?
If there are no specs, I would go with a 1-3/4" door for durability.
thanks. on the blueprint it is not noted as a fire rated corridor.
and the door jambs wil be wood.

do you know if for commecial it is REQUIRED to have a 1 3/4thd?
or will it be optional as it is not a fire rated corridor etc.

thanks guys
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Old 12-21-2010, 09:38 PM   #12
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Re: Door Thickness Question


I've only seen 1-3/4" solid core doors on commercial projects. Like the others have said, I'd verify with either the building department or the fire marshal as to whether or not the door needs to be fire rated (which will include a tag affixed to the back edge ). My guess is that it would.
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Old 12-21-2010, 09:42 PM   #13
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Re: Door Thickness Question


Quote:
Originally Posted by Tinstaafl View Post
I'm pretty sure that fire code trumps ADA guidelines. Sounds like you're not used to commercial work.

Curious, what sort of trade is "A and F"?
it is my first time getting into commercial
A is for Auto mechanic and F is for Framing
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Old 12-21-2010, 10:27 PM   #14
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Re: Door Thickness Question


1) In 15 years of commercial work, I have never seen a 1 3/8" tick door except as scabbed in by a resi guy hacking his way thru a commercial job

2) Fire rated door assemblies most often require only gasketing, and sometimes a sweep. They always require ADA compliant hardware and a closer. The Steel Door Institute circular SDI-118-01 is a fine primer on fire rated door assemblies

A correctly compiled door schedule will tell you if the door is fire rated, and its hardware requirements

3) I have found that most often the bathroom are inside of the fire corridor, and fire rated doors are not needed. The walls of the bathroom exclusive of the shared wall with the hall most often comprise the rated walls. This is clearly not a legal requirement, and is mearly a design result of good architects.

4) Your plans should make all of this clear. Even if the job is non permitted (which is a subject I won't go into further), a job like this should have proper plans
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Old 12-21-2010, 10:45 PM   #15
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Re: Door Thickness Question


Quote:
Originally Posted by Anti-wingnut View Post
1) In 15 years of commercial work, I have never seen a 1 3/8" tick door except as scabbed in by a resi guy hacking his way thru a commercial job

2) Fire rated door assemblies most often require only gasketing, and sometimes a sweep. They always require ADA compliant hardware and a closer. The Steel Door Institute circular SDI-118-01 is a fine primer on fire rated door assemblies

A correctly compiled door schedule will tell you if the door is fire rated, and its hardware requirements

3) I have found that most often the bathroom are inside of the fire corridor, and fire rated doors are not needed. The walls of the bathroom exclusive of the shared wall with the hall most often comprise the rated walls. This is clearly not a legal requirement, and is mearly a design result of good architects.

4) Your plans should make all of this clear. Even if the job is non permitted (which is a subject I won't go into further), a job like this should have proper plans
1 i was thinking the same for commercial that 1 3/8 wouldnt be right thats why i cancelled my ordered

2 yes i have already bought the closer (not the self closing hinges as in garages residential etc but the arm) and right now im shopping for the ADA compliant handles for commercial

3 the insulation, walls etc have all passed inspection. not bs'd around
the space was tight but the space radius and all were within ADA spec.

4 i think i will go with the fire rated 1 3/4 and i will call to ask if the sweep/threshold is indeed needed but then the floor wont be smooth [im thinking] or just the gasketing around

sorry new to commercial but 15 yr on resi.
i really want to get this right and not just go with a random hacked door thats why i here thanks guys
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Old 08-02-2011, 08:41 PM   #16
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Re: Door Thickness Question


commercial doors are always 1 3/4" if it's a KD ( knock down frame) than its not a fire rated door but it's still an 1 3/4" hollow door, if it's a wood frame jamb than it's an 1 3/4" door solid or hollow depending on the location and it's not fire rated.
If it's a welded frame than it's deffitnitely a fire rated 1 3/4" door
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Old 08-06-2011, 11:52 PM   #17
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Re: Door Thickness Question


There are fire rated knock down frames and thicker doors than 1 3/4
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Old 08-07-2011, 12:03 AM   #18
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Re: Door Thickness Question


Find out who did the plans and ask them about what is the proper door to use.
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Old 08-07-2011, 12:04 AM   #19
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Re: Door Thickness Question


And it sounds like you might already be hacking it up because division 8 and 9 of the plans and specs usually tell you exactly what you need all the way down to the manufacturer. And there are allot of fire rated doors with no sweep or thresholds and allot don't require smoke seals.and fire rating embossments should never be on the bottom of the door but the top or hinge side. If it's not a hollow metal fire rated door sex bolts are required for all hardware and lead fused fire bolts for doubles.
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Old 08-07-2011, 12:07 AM   #20
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Re: Door Thickness Question


And there are wood fire rated jambs there usually gypsum with a wood veneer. You see them allot in institutions like retirement homes.

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