After tying the bottom horizontal stick, Han Cheng picked up two 55-centimeter sticks.

He put one end of the two sticks together with the top of the stick nailed vertically there, and asked Lame to tie them up with a rope while he held them.

After tying them, use ropes to tie the two sticks that serve as the hypotenuse of the triangle together with the two ends of the horizontal stick below.

Triangles are stable. The one constructed by Han Cheng has three triangles at once, so it goes without saying that it is very solid.

This matter was not complicated. After Mu Tou and Hei Wa watched Han Cheng and Bo tie up one person, they took their tools to tie up another one.

Before long, all six parts were tied up.

Bo looked at the "mountain" shaped frames on the wall every 1.5 meters, then turned to look at the house where they lived, and suddenly a look of realization appeared on his face.

The things that the Son of God is tying to them now are very similar in shape to the 'gable' of a house.

When the house was first built, after the gable was erected, the next step was to install the roof beams. Do we still have to do the same now?

He told Han Cheng what he was thinking. Han Cheng nodded happily and agreed with Bo's idea.

This primitive carpenter is getting further and further on the path of the ancestor, but I wonder if he can make a flying wooden kite by then...

Because of his lame leg, Han Cheng did not let him go down this time. Instead, he asked Heiwa and Mu Tou to go down and find some straight branches with a diameter of between one centimeter and three centimeters.

These branches are the horizontal 'beams'.

The Qingque tribe had no shortage of branches of this specification, and it didn't take long for the two of them to bring up a small bundle.

Han Cheng first selected the straightest ones and placed them aside. These were to be placed on the top and serve as the "ridge" of the roof.

When tying the triangular beam just now, Han Cheng deliberately made a small X-shaped groove at the top. At this time, the top "beam" could just be stuck in it, and it could be firmly tied with a rope.

Then two long wooden sticks were tied to the bottom and middle of the two sides of the "tripod", which looked similar to the roof when the house was built.

After these are completed, the frame of the top of this seven-and-a-half-meter-long wall will be completed.

Han Cheng asked Mu Tou and Hei Wa to go down and bring up two bundles of straw.

At this time, the skeleton was complete, and the two of them had completely understood the Son of God's intention. They were very happy, and after listening to Han Cheng's instructions, they hurried down to get thatch.

However, Bo was a little hesitant, because according to his previous experience in building a roof, what he needed to do next was to tie the rafters, lay the fences, paste the mud, and then put on the thatch.

How come the Son of God has skipped so many steps and gone straight to the last step?

He thought about it and asked his question.

What is being built now is just to protect the wall from rain, and no one lives below, so they don't need to be built to such high quality.

Moreover, the ceiling above the wall is extremely small, with the slope on one side not even as long as the lush thatch. Just relying on the frames is enough, and there is no need for so many other things.

Han Cheng told all this to Bo Ting. After listening to it, Bo thought for a while and nodded in agreement, thinking that what the Son of God said made a lot of sense.

This made him vaguely understand the principle of making adjustments based on specific circumstances.

Of course, this was just a vague awareness and he couldn't summarize it.

The thatch is tied tightly to the frame with ropes in bunches, leaving no gaps. This is somewhat similar to tying thatch on a bamboo hat.

The last step of tying thatch is a delicate job. It took several people a while to complete this seven-and-a-half-meter-long roof.

After putting on the golden "cone hat", this section of the wall immediately appeared extraordinary, and it looked much more noble compared to the surrounding walls without "cone hats".

It is true that clothes make the man, saddles make the horse, and a fence also needs a 'hat' to add luster to it.

Both sides of the 'hat' extend to the outside of the wall. When it rains again, the rain will drip directly onto the ground along the edge of the hat and will no longer soak the wall.

Wu, who had been spending more and more time lying beside the rabbit pen watching the rabbits in the past two days, stood there and looked over from afar. With the existence of the house and the deer shed, he could easily understand the significance of what Han Cheng and the others were doing.

The witch took a look and couldn't help but pat his head. The deer pen can be covered with a roof, the house can be covered with a roof, so why can't the wall be covered with a roof?

Why didn’t I and others think of such a simple truth and method before the Son of God did it?

Han Cheng's work of adding a roof to the wall temporarily attracted Wu's attention, making him shift his gaze away from the rabbits in the rabbit pen. Wu, who slept very late at night, often looked up at the stars and drew moon-shaped stones on pottery plates, asked Han Cheng and Bobo and a few others about the whole story of adding a roof to the wall.

After asking clearly, he handed the record to the stone and continued to watch the rabbit.

With this seven-and-a-half-meter-long wall top as a demonstration, Han Cheng doesn't have to worry about the rest. His senior brother and others who have freed up their time from harvesting thatch will take care of it.

For the eldest brother and others who had built more than ten houses, it was not difficult to build such a small-scale wall roof after knowing the specific method.

Just as Han Cheng was anxious to become a hands-off boss and go to check on the charcoal burning, he suddenly realized a problem.

Still about the wall.

Doing this can indeed prevent the outside of the wall from being washed away by rain, but it will not work on the inside.

Because right next to the inside of the wall is a low wall that is much wider than the wall.

When the time comes, the water on the inside of the wall will drip directly onto the low wall along the thatch.

Han Cheng smiled helplessly. Damn it, this is really a case of losing sight of the big picture.

It seems that we can only wait until the eldest brother and others have finished building the ceiling above the wall, and then dig a small ditch on the top of the low wall facing the inner 'eaves', and then let Heiwa burn a batch of arched long tiles and put them in, use wood ash cement to make seams, and build a drainage system on the top of the low wall to guide the water on the low wall down.

Fortunately, it is winter now, with less rain and more snow, so there is no need to rush to build the drainage ditch for the time being.

Han Cheng had made up his mind and stopped thinking about it. He reached out and touched the earthen kiln and the pottery plate, and found that there was not much temperature left. So he and Heiwa, who came with him, removed the pottery plate covering the earthen kiln.

With just one look inside, Han Cheng knew that the wood in this earthen kiln had been burned out again.

A large area of ​​firewood in the middle was reduced to ashes, and some of it was not burned on the edge. In the transition area, there was some burned charcoal and a lot of wood that was not burned through...