metal deck connection 6

[Veer007]

Hi all, I am working on a deck detailing job, Is it acceptable to offset headed studs from the centerline of a beam in composite slab construction, given that the deck is stopped at the beam centerline and cell closures are used?

Thanks in advance!!

 

[HTURKAK]

IMO , If dia. of studs not more than 19 mm this detail is reasonable ..

Pls look to the page 68 of the following doc.









I cannot give you the formula for success, but I can give you the formula for failure..It is: Try to please everybody.

 

[Veer007]

Thank you! I thought it would be an issue that beams connected with the slab above.

Thanks in advance!!

 

[OldDawgNewTricks]

What code are you using? AISC requires the shear stud to be centered if the beam thickness is small.

 

[Veer007]

I am using AISC code. Are there any criteria for this?

Thanks in advance!!

 

[BridgeSmith]

Why do the studs need to be offset? You either notch the closure angle a little and the deck form pan a little, or you put a hole in the deck form pan. Doesn't seem like it makes a whole lot of difference, and the effective flange width isn't going to change much either. Why violate the code and have to consider eccentric loading and torsion on the beam?

 

[jerseyshore]

The studs are the important part of the design, like BridgeSmith said, fix the deck a little. Don't change the main structural elements. This is the type of thing a lazy contractor would do and then ask you to approve after it failed inspection.

AISC has a bunch of criteria for shear studs (spacing, layout, rows, etc.).

 

[OldDawgNewTricks]

I am using AISC code. Are there any criteria for this?

AISC 360 is a free download, you should be able to find all the criteria you need. Here's a snip...

 

[Veer007]

please advise, if it is acceptable to extend deck to w-beam outer flange and support over pour stop when we couldn't maintain min. bearing 2" (if beam is 4" wide) as we shouldn't stop deck at beam center to allow room for studs and to keep beam eccentric? Below is just an example for deck and pour stop

Thanks in advance!!

 

[BridgeSmith]

It doesn't look like there's enough room for concrete to get adequate embedment of the studs.

 

[hokie66]

What's that closure on the end of the deck? Looks like that gets in the way of your studs and concrete.

 

[dik]

It's a screed strip... common to composite steel deck construction in these environs... They have 'inserts' that fit into the deck flutes that prevent the concrete from 'escaping'.

-----*****-----
So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik

 

[hokie66]

It can't be used for screeding. There is already an edge angle at the end of the slab for that. That horizontal leg of the 'screed strip' is going to foul the casting. I understand the desire to stop concrete from escaping under the deck, but there has to be a better way.

 

[dik]

That is the edge angle... Rolled angles are not often used in these environs, anymore... and they use 'plastic plugs' to keep the concrete in... on almost any project I've seen in the last two decades. That little downturn gives the edge a clean line as well as stiffens the leg of the L shaped cold formed section. It is actually called a 'screed strip'.

-----*****-----
So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik

 

[hokie66]

We are talking about different things. Look at the photo, not the first post. I agree on the screed strip, but it is the end of the deck that I am talking about. See how it is closed off with what looks like a light gauge angle, leg horizontal on top of the deck?

 

[dik]

OK hokie... that's a screed strip, but it's way too close to the end of the deck. The bent angle to close off the flutes isn't used very often in these parts...

-----*****-----
So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik

 

[Veer007]

Guys, below is the snap that illustrates my idea, is it okay to support the deck over pour stop for this case, please drop your thoughts.

Thanks in advance!!

 

[hokie66]

That looks good to me.