Metric tee callout

[dozer]

Does anyone know how to call out metric tees on a drawing? We're designing a pipe rack that will be fabricated in Thailand or somewhere near and using tee shapes that meet JIS G 3192 for bracing.

I have a catalog from JFE Steel Corp. They have what we want to use listed as "125x125" under nominal size. So how would I show that on a drawing?

What document dictates this and where can I get it?

 

[Constructioneer]

dover -
width of section (mm) x depth of section (mm) x mass per meter (kg / m)

Not sure if there is a prefix like with AISC.

Hope this helps.

Tim

 

[hokie66]

Structural tees are usually split from wide flange beams. A tee which is half of a 250UB31 is called a 125BT15 in Australia. It has a 146 wide x 8.6 thick flange, and the web is 6.1 thick. But I don't know how JFE Steel, which is a Japanese company, makes their tees or what type nomenclature they use.

 

[pba]

JIS sections are usually called out as depth x breadth x flange thickness. Tees are confusing we called off in the same way as beams. My JIS tables have two sections at 125 x 125 with 8 or 9mm flanges. If you wanted to be even more specific you could call out the actual size 124 x 124 x 8 TEE or 125 x 125 x 9 TEE.

I suspect I might be contradicted, but the rest of the world seems to use section weight, so you could do that also, even if the call off is now getting very long.

 

[rtmote]

In Canada, this is:
WT125 x 29 (or whatever the actual weight is in kg). Weight determines the depth of the T.

Good idea to call out the actual size. I prefer that. A quick call to the fabricators and they'll tell you what they'll use. So long as they cut the right material.

Robert Mote

http://www.motagg.com

 

[dozer]

Hmm . . . I'm getting the feeling there is not standard way to call this out. Rtmote, I would call the fabricator but we don't know who they will be or even what country they will be in.

This is constant frustration I have with doing work that will be fabricated overseas (outside the U.S.) The client is only too happy to tell us not use U.S. customary units but then they give us very little guidance on naming conventions, material availability, etc. I don't think they realize their are different standards in different countries as you can see by the replies here. Australia calls it one thing, Canada another though both use metric. I think they think, "Oh, it's metric, so it's simple." While pba did give me an answer for JIS (Japanese) sections, I infer that there really isn't a standard way to call them out.

Anyway, keeps those cards and letters coming. Thanks for the replies so far.

 

[hokie66]

By googling "JIS G 3192 shapes", I found the Gunung Steel Group,

http://www.grdsteel.com,

and the section properties you need.

 

[dozer]

Hokie66, thanks, but I don't need the section properties. I've got those. Here's all I'm asking. In the U.S. to fully describe a tee section on a drawing we would write next to the member, for example, "WT5x11". The convention is "WT" <nominal depth (inches)> "x" <nominal weight (lb/ft)>.

This is a standard way of desiginating a tee made from a W-shape as prescribed by AISC. Calling it out any other way is wrong.

Maybe I'm asking the question the wrong way. Since I'm using JIS sections, let's talk about Japan. Do they have such a system in Japan? Is there a body analagous to AISC that prescribes a uniform way to call out sections so everybody is on the same page or does everybody just do their own thing?

 

[hokie66]

Dozer,

On the site I suggested, the nomenclature is as follows, for example:

T 75x150x7x10
75 = height
150 = width
7 = web thickness
10 = flange thickness

Since this is a Japanese site, I assume this is the way they do it, but I can't be sure.