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00:00Now, the next thing to do is to add support, so click support, then click create.
00:05The support we'll be using is pinned support.
00:10So why pinned support?
00:12You might be asking, why pinned?
00:15First, this is a 3D model.
00:17If some of you already watched videos on YouTube, you might have seen that some engineers
00:21only model one trust, and they don't use pinned support.
00:24They use enforce but support and apply release, either MX, MY, or MZ, depending on the direction
00:32where the truss is located.
00:34Take note, that only works for a 2D model.
00:36In this type of model, we are doing a 3D model since we modeled the complete truss system.
00:41Also, we use pinned support because when two different materials meet, like concrete to
00:45steel, steel to timber, or concrete to timber, it should always be pinned support for your
00:51factor of safety and accuracy of analysis.
00:54To make it simple, use 2D truss modeling for simple, flat trusses in one plane and 3D modeling
01:01for spatial or irregular trusses.
01:03Always use member releases or the truss command to simulate pin joints, which reflect real
01:09truss behavior.
01:10When different materials meet or the connection can rotate, assume pinned for safety and accuracy.
01:15Now select pin, then click add.
01:17Next, we'll assign the support where the truss and roof beam meet.
01:21First, click this S2 support, then use the cursor to assign, then click this assign button.
01:27Make sure that the mouse pointer changes to the support icon we're going to use.
01:31In assigning support, you must zoom in, especially to all corners, where there might be nearby
01:36nodes that you could accidentally click.
02:09Another, this is not to only one side of the slide, but didn't have to be one side of the
02:10slide.
02:10Take a look at the tab, and then start to see the star by the pin and the pin and
02:10the pin that
02:10has your gemaakt.
02:10It is the starting point where the pin and the pin and the pin挟 is down.
02:10The pin and the pin is back in the middle and the pin.
02:10The pin is back in the middle and there'll be two pieces to go.
02:12This is the pin and the pin is the pin.
02:12Next, you'll see it all the pins.
02:13Injacket, you'll see it as well.
02:32So, after assigning all those supports, now click Display Hole Structure.
02:36Then check all those corners using Dynamic Zoom.
03:11After checking and confirming there's no misassigned support,
03:25now proceed to the Select menu bar, then under the Nodes category, select Support to highlight only the supports.
03:32Then, in the View menu bar, select New View, then click OK.
03:38Now only the supports are visible.
03:44Now right-click, then select Nodes Cursor, then select All.
03:49In the menu bar, the Node tool will now appear. Click it and select Renumber Nodes. Then click Yes.
03:56So, for our guide for renumbering, it's like this.
03:58All nodes in Base or Ground Floor will start from 1,001. In 2nd Floor, start from 2,001. In
04:063rd Floor, start from 3,001. In 4th Floor, start from 4,001. In this top level, it will start
04:14from 5,001.
04:15So, by using this renumbering method, we can easily identify what level each node belongs to.
04:22In this Trust support, since it's located at the top level, it's in the 5001 series. So, we will start
04:29at 5001. For Start Numbering From, input 5001.
04:33Now, for sort criteria, take note of this. We always use X and Z coordinates. In Plan View here in
04:40STAAD, X and Z coordinates are always involved. So, in the criteria, we should be consistent.
04:46But in some superstructure modeling, others might interchange the X and Z. But most of the time, X comes first,
04:53and Z is second. So, now select X coordinate first, then click this arrow pointing to the right, then select
05:00Z coordinate.
05:02The new numbering order is always ascending. Now click Accept, then click OK.
05:12So, our total pin supports are 40. Now press Shift-N to show node numbers.
05:27If you want to change the font, just right-click, then select Display Options. Then, under Node Labels, click Font.
05:35Now you can select the font you want, the style, and the size. After you select those, click OK, then
05:42Apply, then OK again.
05:44You can also change the font for beam dimensions, as long as it's included in this list.
05:49Now, since we already placed all the supports, we are going to delete all the roof beams. These are no
05:55longer needed.
05:56Now click Display Hole Structure, then isolate to top view.
06:05Right-click, then for selection mode, choose Drag Line. So, for Drag Line compared to Drag Box, when selecting, it
06:13creates a line.
06:14And if the line touches the beam, it's immediately selected once you release the left mouse button.
06:19So, we're going to delete first using this method. After it selects all of this, press Delete.
06:42Now zoom out, and you can now easily select all the roof beams using this drag line. After selecting all
06:49those beams, press Delete, then OK.
07:19Now click Display Hole Structure to view this in Perspective View or Isometric View.
07:25Next assignment is the Perlin Geometry. So first, in this truss, select all the segments of beams in the top
07:32chord. We're going to merge them.
07:34Why are we going to merge it first? It's because we're going to insert nodes along this top chord where
07:40we'll put the purlins.
07:41If we don't merge it, we won't get an accurate measurement or spacing for the purlins. So, for now, we'll
07:47make it one continuous member.
07:49As you can see, it's segmented at this time. So, to merge it, since we already selected the beams, proceed
07:55to the Geometry menu, then click this icon. This one is for Merge Selected Beams.
08:00Now a dialog box pops up showing the beam numbers we selected. Click Merge, then Yes, then Close. Now click
08:11the top chord we just merged.
08:12The beam is now already connected. Next, press Shift plus E to see the end nodes or beam ends. As
08:19you can see, the end node is at the top or on this side.
08:27So, to interchange that, press the space bar, then select this tool, Redefine Incidences. Then we will switch the incidences.
08:35Then click OK.
08:37Now press Shift E again. Now the green is on top and the blue is on the bottom.
08:42We switch the incidences because when we insert nodes, it always starts from the starting node.
08:47By the way, you can also find Redefine Incidence in the Utilities menu. Just click it, then under Beam Tools,
08:54click Beam Incidence.
08:59Now select the beam, then right-click, then choose Insert node. The first distance is 0.1 meters. Now click
09:06OK.
09:06If you're wondering why 0.1 meters, it's because most purlin spacing, starting from the apex to the first purlin,
09:14is close together.
09:15So the first spacing is usually 0.1 meters. Then it continues 0.375 meters. Then 0.6 meters for
09:27the rest.
09:27Now select the beam again, then insert the next node at 0.375 meters. Then select the beam again, then
09:42Insert node.
09:43As you can see, the beam length is around 6.25 meters. We can divide it by 10 or, let's
09:49say, 11 segments.
09:51So again, formula is total number of segments equal number of spans minus 1, so n equal 10.
09:58Now choose Add End Points. So now we get a segment length of 0.5688 meters.
10:10Click OK. Next, go to the Geometry menu, then select Perpendicular Intersection.
10:23Now connect these nodes perpendicular to this beam. Be careful of nodes that are close to each other.
10:29Now connect those nodes and there.
10:30Now connect those nodes at 0.175 meters.
10:34Now connectión меньше than O difunties.
10:34Now click this clip-up, then click the green call.
10:36where you airake of get the two moreienza.
10:46Now click D. Puse is like 40.
11:02After we've connected all the perpendiculars to this beam, now the other top cord of the
11:07hip truss, we're going to merge or set it as one member.
11:18Now select all the segmented members in that top cord, then merge it.
11:23Same process as before.
11:24If you remember, we used stretch to an existing member, just like we did when making the truss
11:30geometry.
11:31This step is similar to that.
11:33So first, select all the beams.
11:35To do that more easily, right-click, then select Drag Line Selection, then select the beam.
11:42Next, once it's selected, proceed to stretch beam to an existing member.
11:49Then click this to select the member.
11:51Click the one we recently merged, then click Apply.
11:55Now it's already connected.
11:57Do the same for the other side, just like what we did earlier.
12:00Merge the top cord, then stretch beam.
12:23go to the at-step the ground.
12:24There you go.
12:29Check the one we have.
12:31I'm going to choose to see the items, which are the items, which are the three-parts at the
12:45Go ahead.
12:46But we have the right for the right.
12:47We're going to choose the right.
12:51We're going to choose the straight-person mark.
12:51We're going to choose the right.
12:54Now we will select all the purlins we created, then just copy them to the other side.
12:59To do that, we'll use the mirror tool again, then mirror it to the other side.
13:03Just follow along.
13:04It's the same process as the mirroring we did earlier.
13:23Now, as you can see, it's already mirrored.
13:26Next is the purlin along the z-axis.
13:28To do that, go to top view.
13:37Then select this beam, but the last beam on top with 0.1 meters is not included, since
13:43we don't need a purlin in that direction.
13:45That part is already too close to each other.
13:47Just select the purlins, just like what I'm selecting.
13:51Once you've selected these purlins, go to the View menu, then select New View, then click
13:56OK.
14:03Now right-click, select Node Cursor, and choose Drag Box, then select all these nodes.
14:09Once selected, proceed to the Geometry menu, then choose Connect Beams.
14:21And it's along z-axis, then click OK.
14:31Do the same for the other side.
14:32Take note, everything should be connected.
14:34If not, then something is wrong with your model.
14:38The nodes might not be in the same level, so you'll need to redo the work.
14:41Start from modeling the purlin geometry again.
14:45If that still doesn't work, you may need to start from the very beginning.
14:49Or if you want to just continue, even if some nodes are not connected, then add beams manually
14:55and connect all those nodes.
14:57Now display the whole structure, then isolate in isometric view.
15:01Now again, save your work from time to time.
15:04So save it.
15:16Next, as you can see, the purlins are still not intersecting the truss.
15:26So to fix that, select all, then choose Intersect Selected Beams, then click OK.
15:45Now as you can see, the purlins are now intersected to the trusses.
15:56Now again, save it.
15:58We have now completed the truss in purlin geometry.
16:01Now again, save it.
16:01Also purpose�리.
16:02So, let's see.
16:03MODE.
16:03Thank you very much.
16:04Today, we make a 7-11 chance of $REAA hå勢 않.
16:07Do a thick spot of revenge when it comes.
16:07You can be elected after divided by the pagan Vayner app.
16:08Let's narrown stop on the сделал clock.
16:08You can see your life, looking back.
16:08So, we get this Coconut Такή here.
16:14You
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