Steel: End Plate Moment Connection

So in this bolted connection, it's specifically called an end plate connection. What we have here is this plate that is welded to this white flange in the shop. So the plate, sorry, the white flange comes with the plate attached. welded in the shop and it is bolted in the field and as discussed earlier any bolts on the web are doing shear to make a moment connection the top is going to go out when loaded when loaded the top wants to pull out and the bottom wants to push in. So without these bolts beyond the flange, we don't have a moment connection. To have a moment connection, we must bolt beyond the flanges. So the fact that we have these bolts, then that is what's making it a moment connection. Because all the bolts that are on the web itself are doing shear. It's just the ones that are beyond that make a moment connection. So looking at this one, it's this bolt and this bolt that are making the moment connection. And the same on the other plate. Again, anything on the web is just doing shear to prevent rotation. Therefore, a moment connection. The top, sorry, you have to have bolts above the top flange and below the bottom flange. Again, I did this in a previous video, I just can't emphasize this enough. When there is a load on this beam, let's say it's connected and it's spanning like this. When loaded with a uniform load, a concentrated load, whatever it is, it wants to do that. So the top is going to pull out and push in, and it makes a moment there. So to prevent the rotation and to keep this straight, you make a moment connection. So the moment connection is identified immediately because of these web stiffeners. The web stiffeners tell me there's a moment connection. And the fact that there are bolts beyond the top flange and beyond the bottom flange, that tells me that this is a moment connection. As this one, as this top flange wants to pull out, these bolts have to push, keep it back from going. So these guys are in tension. And as the bottom wants to kick in, these bolts, the two bolts outside the flange have to fight back and therefore are in compression. Likewise, this compression web stiffener and this one is a tension web stiffener and the four bolts or 50 bolts that are between the two flanges are doing shear. They don't do anti-rotation. They don't do moment. Any bolts on the web are doing shear. Any bolts beyond the web are preventing rotation. One set goes in tension, the other set goes in compression. Okay. Продолжение следует...