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00:00Now, since we're already done with modeling management, we proceed to the next page, which is the properties.
00:06In steel properties, we go to legacy or standard. For me, I use legacy.
00:11Now, in assigning the properties, we'll start by assigning just the initial sizes for both the truss and the purlins.
00:18At this stage, we are not yet finalizing the member sizes. We're only choosing a starting point.
00:23So initially, we choose the minimum sizes that are available.
00:27For the trusses, we will be using angle sections.
00:30Again, in this part, you can choose what's applicable based on your project location and the availability of materials.
00:36So, for the angle section, just choose the minimum or smallest size available for now.
00:42For type, select LD.
00:44Then, for clear spacing, input 0.006 meters.
00:48For material, we will be using steel 36 KSI.
00:52Now, click Add, then Close.
00:54Next, we'll assign this to the truss.
00:56Select the property we just added, then select the truss members.
01:00Now, choose Assign to Selected Beams, and then click Assign.
01:04At this point, it's already assigned to the trusses.
01:07To check it, press Control 4.
01:10Now, as you can see here, some of the trusses are not facing the right way.
01:14So here, you'll notice that the bottom cord and the vertical web members are not facing the right way.
01:22Especially to the Z-truss direction and diagonal truss direction.
01:43Now, we first proceed on fixing the bottom cord.
01:46As you can see here, the flat face of the bottom cord is facing upward.
01:51So we need to rotate it by exactly 180 degrees.
01:55This will make the flat face point downward, which is the correct orientation for the bottom cord.
02:10So, to fix this orientation, first create Beta Angle, then type in 180 degrees.
02:17Now, select all bottom cord, and then assign it.
02:27To check if it works, press Control plus 4.
02:30Then, zoom in on the truss.
02:42Now, as you can see, it's already fixed.
02:46The flat face of the bottom cord is now facing downward, just as it should be.
03:00Now, we proceed to the vertical web members along the Z-direction.
03:03First, select all Z-direction trusses.
03:15Then, select this truss.
03:17After that, press Control plus 4 to view the 3D model.
03:31As you can see, this vertical web member is facing in this direction, so we need to rotate it.
03:41Since it's going in this rotation, it is counterclockwise, which means it's negative 90 degrees.
04:05Next, we look at the king post.
04:07We check where it is facing.
04:08Since it's the king post, and it's located in the middle of the truss,
04:12it can be either a positive or a negative rotation.
04:15So, both positive 90 degrees and negative 90 degrees are possible.
04:34Then, for this one, same direction as the other vertical web member,
04:38but this one will be rotated in positive 90 degrees.
05:01Now, select all vertical web members.
05:04Now, select all vertical web members.
05:15Next, select these vertical web members, and create a beta angle of negative 90 degrees.
05:34Then, assign it to the selected beams.
05:37After that, select the remaining vertical web members, but this time include the king post.
05:42Then, create a beta angle of positive 90 degrees, and assign it.
05:58Now, display the whole structure.
06:00Then, select this truss again, and press control 4 to view the 3D model.
06:11Zoom in.
06:18As you can see now, the vertical web members' orientations are correct, including the king posts.
07:03Now, we proceed to diagonal web members.
07:06We start with D1.
07:17This diagonal web is a bigger one corner.
07:18Now, we'll count it a little longer.
07:21Now, we mount a desired situation with the 3D model.
07:22This diagonal work moves around a center of theuming wind.
07:22So, we get togger the ICial Act.
07:23Let's go here.
07:26So, a little more time here, it goes ahead and adjust the strangearlo.
07:27On the right up top of the description.
07:29Ok, so we start with this whole意 elements.
07:43So, this angle is available.
07:46is angled at 45 degrees so we need to rotate it by 135 degrees clockwise which is positive 135 degrees
08:18now select all vertical web members create a beta angle input 135 degrees then assign
08:39to check it press ctrl 4
08:56as you can see now the vertical web members orientations are correct
09:36now for x1 the angle is facing this direction we rotate it 180 degrees
10:01create a beta angle of 180 degrees then assign to all vertical web members
10:14to check it press ctrl 4
10:25as you can see now the vertical web members orientations are correct
11:02thì ctrl 4
11:06is
11:06to
11:17Now for D2, it's facing this direction, so from its current angle to the desired one, we need to rotate
11:23it negative 135 degrees.
11:53Create a beta angle, input negative 135 degrees, then assign.
12:08To check it, press Ctrl-4.
12:23As you can see now, the vertical web members' orientations are correct.
13:30For D3, the angle is 45 degrees in a positive direction.
13:35So, create the beta angle and assign positive 45 degrees.
14:04To check it, press Ctrl 4.
14:22As you can see now, the vertical web members' orientations are correct.
14:53Next, we proceed to D4.
14:54Select and highlight and then new view.
15:24For D4, it's 45 degrees.
15:26But in the opposite, counterclockwise direction.
15:29So, that's negative 45 degrees.
15:32Create the beta angle, assign it.
16:12Now, for X2, you can see it's already correct.
16:25Now, we proceed to the Perlins property.
16:27Go to Legacy.
16:35Then select Cold Form Steel.
16:37Still under American.
16:39Select Channel with Lips, then choose the smallest size available.
16:43Set material to 36 KSI.
16:45Click Add, then Close.
16:46This is just for initial sizing.
16:49We'll identify and optimize the best size for this project later.
16:52Now, select the property we just added, then select the Perlins.
16:57Choose Assign to Selected Beams, then Assign.
17:06To check it, press Ctrl 4.
17:16You'll see the Perlin orientation is not correct.
17:19It should follow the truss angle.
17:21To do that, we first need to compute the slope angle.
17:50you'll see theosing area of place.
17:54So, the current number of groups are estão pathways.
17:54Now, if there imply that you canidences of the court inside.
17:59This is a state plan.
18:00We must pass through Lock ined Orc.
18:00Now I'll wrap those tim aperture back on a Kad расс,
18:00So, we just are not sure until that happens.
18:08This shortly after Big Ten,
18:08negative 39 square meters to first,
18:08that we finger on the river.
18:08This group could change so much.
18:09In the next stage for you.
18:10Well, back in Red gutter,
18:18we began to missoth3.
18:18We know the building width is 10.5 meters and we offset it by 1 meter.
18:26So, 10.5 divide 2 is equal 5.25 meters plus 1 equals 6.25 meters.
18:56The height is 2.5 meters.
19:20So, in default, the purlin is in this orientation, but that is incorrect.
19:26It should be oriented like this.
19:28The purlin needs to follow the same angle as the top chord.
19:31Later on, we will fix this further using the offset, but only once we already have the final size of
19:37the purlins.
19:38For now, we just need to correct the orientation of the purlins.
19:42To do that, we first need to compute the angle.
19:44Now, this angle here is the same angle as this one.
19:48And as we all know, a straight line is 180 degrees.
19:52So, after we compute the angle, we will subtract it from 180 degrees.
19:57To get the angle, we use the tangent function.
20:00So, we apply inverse tangent of the 2.5 divided by 6.25.
20:18That gives us an angle of 21.8 degrees.
20:41Now, subtract that from 180.
20:44That gives us 158.2 degrees.
20:50Next, the question is, is it positive or negative?
20:54You can try assigning positive first.
20:57If it doesn't look correct, then try negative.
21:09But to properly identify the sign, we already know that the start node is on this part, and the end
21:15node is on that part, since we managed that earlier.
21:18So, end node here, and the start node here.
21:27This tells us that negative rotation goes in this direction, and positive rotation goes in the opposite direction.
21:51By default, the Perlin is in this position, but we need to rotate it counter-clockwise.
21:55That means, the sign is negative.
21:58So, we input negative 158.2 degrees.
22:34Now, create a beta angle, input negative 158.2 degrees.
22:49Then assign it to all the Perlins.
22:51Click Assign, then check the result using Control-4.
23:12Now, as you can see here, the orientation is now correct.
23:31You can also check the orientation by using this view.
23:34Then press Control-1 to switch to Wireframe view.
23:37To bring it back to the default view, just press Control-0.
23:47Now, as you can see here, the orientation is already correct.
23:51So, this is why model management matters.
23:53Since we assigned all the start nodes at the bottom, it makes it easier to know that clockwise is positive
23:59and counterclockwise is negative for the certain direction.
24:02If we didn't fix that earlier, we'd waste a lot of time now just correcting these beta angles.
24:08Now, I know you've seen that the truss and Perlins are not in the correct alignment.
24:12We need to finalize first the member size.
24:15Since right now, we haven't finalized the member sizes yet.
24:18So, we should not assign any offset values at this stage.
24:22Some might ask, aren't we going to correct the alignment of the Perlins, especially if they don't visually sit at
24:28the right location?
24:29You'll notice that it's centered on the top chord, even though it's supposed to be sitting above it.
24:34That adjustment is done by assigning offset values.
24:37But again, we will not assign offsets yet because the member sizes aren't finalized.
24:42Once you change the section sizes later on, the offset values will also change.
24:48So, we'll only assign offsets after we've finalized the section sizes.
24:52Now, we are done assigning truss and Perlin properties and all beta angles.
24:56We can now proceed to the next page, Specification.
25:00But before that, again, save it first.
25:03I'll see you next time.
25:03Okay.
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