Does the building code specify minimum movement capabilities of joints?

[stevesteve]

I understand that ASTM E‐1399 specifies different movement class joints, that correspond with number and frequencies of cycles that the joint goes through during testing and also that on a UL listing, the UL detail will specify what Class movement it has been approved for, but what determines which class movement is required for joint systems?

I also understand generally that Class I is supposed to 'mimic' (for lack of a better term) thermal movements, Class II - wind loads, and Class III - seismic loads.

But is there actually any codes in the IBC that REQUIRE certain class movement? Or is this just a best practice and to be used by the architect for their information to select joint systems as appropriate? And if that is the case that it isn't required by the IBC, then why is it mentioned in the UL listings/testing at all?

 

[Mark K]

Where do you find ASTM E-1399 in the IBC? It is not listed in Chapter 35 of the 2018 IBC? It appears that ASTM considers the standard inactive which may violate an ICC criteria related to reference standards.

My initial impression is that it is not a reference standard.

When a standard is listed in Chapter 35 it lists the sections that reference the standard.

The structural provisions in the IBC do address the need to provide relative movement in some specific situations but in my experience how to protect the building is left to the design professionals.

 

[steveray]

There are deflection limits in the IBC but mark is correct....it's on the designer

 

[stevesteve]

Where do you find ASTM E-1399 in the IBC? It is not listed in Chapter 35 of the 2018 IBC? It appears that ASTM considers the standard inactive which may violate an ICC criteria related to reference standards.

My initial impression is that it is not a reference standard.

When a standard is listed in Chapter 35 it lists the sections that reference the standard.

The structural provisions in the IBC do address the need to provide relative movement in some specific situations but in my experience how to protect the building is left to the design professionals.

I don't think 1399 is specified in the IBC that I know of. So what it sounds like is that this was an old standard/test criteria and there isn't anything that you know of in the IBC which would stipulate the movement class? I'm just curious to know if it ever was a requirement per the IBC, for my knowledge/future reference and/or to know why this standard may have been phased out.

I have always also left it up to the design professionals (architects and structural engineers) in the past to specify movement capabilities of the joints, but I had never seen them specifically call for certain movement class capabilities. It's always just been 'this joint needs to be dynamic/static' (paraphrasing here of course).

Thanks for the response. This has shed some new knowledge on me