00:00If you cross the grass at the top of the pillar and embed two wooden beams that are close to each other,
00:05the beams and columns will lock each other, resulting in a stable frame structure,
00:09which can hold up the roof and get a house.
00:12But the rain will wet the pillar, causing the pillar to rot.
00:15Smart, you can insert a bridge beam and build a cool one on it,
00:18so that the eaves can be farther out to avoid the rain.
00:21But the beam is too glued and easily deformed and damaged,
00:24so the cow sets an inclined beam support under the beam to drag it.
00:28In order to get a tighter open shoulder, you increase the column firmly,
00:32but this will cause the beam to become longer and easily damaged.
00:35In the same way, you can also use the inclined beam support to drag it,
00:40but the inclined beam support makes the space that is not high very difficult to use.
00:45Clever, you can think of the doom to continue downward grooving,
00:49design the good name into a trapezoidal cross,
00:51and then set up beams on it, so that with greater support, you can achieve a longer span structure.
00:56But most of the wood is dug out at the top of the column, which is not strong enough.
01:01You can set the damage head on it,
01:02and the larger wood top is grooved and fixed on the column, so as to invent the bucket.
01:07The beam is designed into a bow shape to be embedded in the bucket.
01:10You invented the arch, and the bow arch is combined layer by layer,
01:14so that the measurement can be lifted up.
01:16Then congratulations, you invented the head arch.
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