Rim Joist, Band Joist - Framing - Contractor Talk

Rim Joist, Band Joist

 
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Old 07-11-2019, 11:04 PM   #1
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Rim Joist, Band Joist


Reviewing my framing nomenclature......... a rim joist runs perpendicular to the field joists while a band joist runs parallel. Agree or disagree?
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Old 07-11-2019, 11:12 PM   #2
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Re: Rim Joist, Band Joist


yea i think so....

but seems like you are being too technical.

most everyone on a job site will call it a rim joist.

have not heard the term "band joist" in a number of years.

had an architect make a note in an addendum once clarifying the two terms.

he basically said they are one in the same for intents and purposes.

PS- my knowledge of framing terms and methods is from sacramento north. may be a regional thing.

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Old 07-11-2019, 11:16 PM   #3
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Re: Rim Joist, Band Joist


Ditto.


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Old 07-12-2019, 01:02 AM   #4
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Re: Rim Joist, Band Joist


I always thought they were the same myself but the other day was doing some stuff using TJI's and it showed up on the diagram from Boise Cascade.
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Old 07-12-2019, 08:16 AM   #5
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Re: Rim Joist, Band Joist


The function of the Rim joist like you described that exactly what its for...
You also have the term for End joist which located on each end of the floor structure, they run in the same direction the rest of the joists do...
Rim joists + End Joists = Band Joist
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Old 07-12-2019, 09:05 AM   #6
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Re: Rim Joist, Band Joist


Quote:
Originally Posted by greg24k View Post
the function of the rim joist like you described that exactly what its for...
You also have the term for end joist which located on each end of the floor structure, they run in the same direction the rest of the joists do...
Rim joists + end joists = band joist
x2.
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Old 07-12-2019, 04:16 PM   #7
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Re: Rim Joist, Band Joist


We just call it all rim joist. I dislike today's OSB rimboard, but such is the engineered framing these days.
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Old 07-12-2019, 05:10 PM   #8
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Re: Rim Joist, Band Joist


Quote:
Originally Posted by META View Post
We just call it all rim joist. I dislike today's OSB rimboard, but such is the engineered framing these days.
You could always request the rim boards to be LVL instead, I thinks its around 3 times the price. I dont like the osb either but I guess it works.... and swells. 1-1/8 rimjoist expands to almost 1-1/2, I cut the I-joists 1-3/8 short on each side instead of 1-1/8.

The biggest drawback to osb is when doing a deck but I always drop the ledger low enough to catch the sill, double top plates and/or lower wall framing. Size the ledger up if necessary and let the excess meat hang low.
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Old 07-12-2019, 05:11 PM   #9
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Re: Rim Joist, Band Joist


There's a good amount of difference structurally between a band joist and a rim joist with the band joist running parallel with the field joists so in that respect it makes sense to differentiate between them, might help bring attention to that for designing.
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Old 07-12-2019, 05:13 PM   #10
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Re: Rim Joist, Band Joist


Quote:
Originally Posted by Big Johnson View Post
You could always request the rim boards to be LVL instead, I thinks its around 3 times the price. I dont like the osb either but I guess it works.... and swells. 1-1/8 rimjoist expands to almost 1-1/2, I cut the I-joists 1-3/8 short on each side instead of 1-1/8.

The biggest drawback to osb is when doing a deck but I always drop the ledger low enough to catch the sill, double top plates and/or lower wall framing. Size the ledger up if necessary and let the excess meat hang low.
Don't think OSB rims would fly out here when working with engineered lumber, there's a big shear transfer at the perimeters usually.
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Old 07-12-2019, 05:20 PM   #11
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Re: Rim Joist, Band Joist


Quote:
Originally Posted by Rio View Post
Don't think OSB rims would fly out here when working with engineered lumber, there's a big shear transfer at the perimeters usually.
It’s all we use. Although I have seen I-joist used for the band (parallel) joist.

https://lpcorp.com/products/framing/rim-board
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Rim Joist, Band Joist-b5462d3a-696a-4286-b03a-475bbe0f2bce.jpeg  
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Old 07-12-2019, 05:22 PM   #12
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Re: Rim Joist, Band Joist


Was thinking more of floors and walls in houses but that's really interesting, seems a little sketchy?
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Old 07-12-2019, 08:50 PM   #13
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Re: Rim Joist, Band Joist


Quote:
Originally Posted by Rio View Post
Don't think OSB rims would fly out here when working with engineered lumber, there's a big shear transfer at the perimeters usually.


What do you use for rim board?
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Old 07-12-2019, 09:15 PM   #14
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Re: Rim Joist, Band Joist


Quote:
Originally Posted by Rio View Post
Was thinking more of floors and walls in houses but that's really interesting, seems a little sketchy?
We've been framing like Big J's picture for years up here. Yeah, lateral issues would be a concern in other areas. In fact, the TJI install calls for blocking or rim joist on reverse ledger (0 barrier) framing. However, it's still kind of goofy because the OSB subfloor is spanning over joists and directly to sill plate, which is anchored to the foundation wall. That situation would have less lateral movement than typical rim joist box framing.

Either way, the band joist is often just that 1 1/8" OSB; crush blocking where applicable. For rim joist, a couple .131 nails going through OSB rim into laminated/engineered top & bottom cord I-joist, is weak, but it's standard.

Last edited by META; 07-12-2019 at 09:22 PM.
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Old 07-12-2019, 09:33 PM   #15
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Re: Rim Joist, Band Joist


Never heard of there being a difference.

Just universally called it rim board, or rim joists, or band joists, (rarely). Never really heard it called end joists out here.

Kind of like barge rafter vs fly rafter.

Not to be confused with a verge rafter. Which is a different thing.
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Old Yesterday, 12:47 AM   #16
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Re: Rim Joist, Band Joist


Quote:
Originally Posted by Jay hole View Post
What do you use for rim board?
A LVL or something along those lines, maybe a Timberstrand LSL, versalam rim, different manufacturers have different names.
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Old Yesterday, 12:58 AM   #17
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Re: Rim Joist, Band Joist


Quote:
Originally Posted by Rio View Post
A LVL or something along those lines, maybe a Timberstrand LSL, versalam rim, different manufacturers have different names.
I've done that. A little expensive though.
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Old Yesterday, 03:55 AM   #18
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Re: Rim Joist, Band Joist


Quote:
Originally Posted by Seven-Delta-FortyOne View Post
Never heard of there being a difference.

Just universally called it rim board, or rim joists, or band joists, (rarely). Never really heard it called end joists out here.

Kind of like barge rafter vs fly rafter.

Not to be confused with a verge rafter. Which is a different thing.
It's all technical terms... for as long as I been around was always called a rim joist. Some old-school architects will use different wording when defining framing members on their plans.
If you look in the code-book, they will define it as Band joist, Rim joist or Header joist.
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Old Yesterday, 07:54 AM   #19
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Re: Rim Joist, Band Joist


Here's a png showing the two conditions along with the big ole honking connectors required now to make a guardrail post code compliant.
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Old Yesterday, 11:03 AM   #20
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Re: Rim Joist, Band Joist


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Originally Posted by Rio View Post
Here's a png showing the two conditions along with the big ole honking connectors required now to make a guardrail post code compliant.
NJ most jurisdictions around me amended this type of post connections...Did 2 decks last year and 3 decks this year and none of the towns requested that. 2x blocking with ledger locks into the post it works and that post is not going anywhere.
Not sure about down the shore requirements, maybe in coastal areas they ask for it, I'm sure a few guys here from South Jersey will comment on Yes or No.

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