The beamless hall is a large building built purely of brick and stone without a single wooden beam or column.

Nowadays, people may not seem to think that this kind of construction is unusual, and many modern buildings do not use wood.

But in those days, there was no reinforced concrete, no high-strength cement, and masonry buildings were really built on bricks and stones.

The large mass, hardness and lack of toughness of masonry, the limited size, and the difficulty of bonding are all huge flaws.

And if nothing else, what about the roof?

Masonry weighs much more than wood, so how can the surrounding walls bear the weight without roof beams?

With these limitations, it is very difficult to build a small building, but it is indeed very difficult to build a building as large as this kind of building on this drawing......

The scroll was badly damaged, and in many places it was simply missing, not a little bit like the last time it was soaked in water.

This kind of place needs to be restored, just like the bird statue he repaired at the beginning, and he can only rely on the restorer to find out the missing part and fill it in.

Even if even Tian Qing came to cultivate, this would not change much.

Therefore, for this drawing, to repair it, it is necessary to figure out how such a large beamless hall was built......

Xu Wen lit up the light of the fire and carefully studied the contents of the scroll.

In terms of appearance, although this beamless hall is not a wooden structure, and even has nothing to do with wood, it still follows the shape of a wooden structure building, making it look like a heavy eaves resting on the top of the mountain, and even makes a bucket arch next to it in a fake appearance.

But this is only decoration, and it is a kind of etiquette perception of architecture in this era.

Its real roof is a curved masonry roof below the summit of the hill, which is thick and huge, extending down to the wall.

"What a thick wall. Xu Wen muttered in his heart.

In order to bear the weight, the roof and walls, especially where they are connected to each other, are so thick that the whole house is actually like a round hole dug out of the ashlar, which looks too solid.

It is precisely because of this that in addition to the necessary door openings on its walls, a few windows are also very small, and it is conceivable that the interior of this beamless hall must be very dark and the ventilation will not be too good.

The reason for this is also very simple, Xu Wen can think of it with a little turn of his brain.

The roof span is too large, and the structure must be thick enough to hold it. But as long as there are holes in the wall, the stability of the structure will definitely be reduced.

This in itself is a pair of contradictions, and the designers of the beamless hall must have taken this into account before doing so......

Suddenly, Xu Wen's heart moved.

In this way, isn't the beamless hall very similar to the cave?

And the contradiction between the walls and the doors and windows is also very similar to the contradiction between the cave and the kiln?

Shi Guangming reorganized the structure of the cave walls in a unique way, strengthening the supporting force between the soil and stones, thus making it possible to connect the kilns.

Can this technique be used in the beamless hall?

Of course, the beamless hall is only somewhat similar to the cave, and the cave itself is a human settlement, and the scale is relatively small.

This hall, which spans more than 50 meters and crosses nearly 40 meters long, is also incomparable to the cave.

The firewood burned, making a crackling sound, and the firelight swayed, jumping on the surface of the scroll, jumping on Xu Wen's body and eyes. Before he knew it, the ground around him had been covered with lines and symbols, and it was constantly expanding outward.

This was after the night of study, when most of the people were asleep and snoring came from the shack.

Nanhua Town was originally in the cracks of the mountain, and after leaving Nanhua, they entered the mountain again, and all they walked was a mountain road.

According to local conditions, the shacks they built when they rested in the mountains at night also changed.

Those who have caves use the caves directly, and those who don't have caves will dig one or half of them, and then cover them with vine or grass or shrub branches on the outside to keep out the wind.

They didn't learn the excavation and production of the cave like the three of them, they just passed by and saw it, and thought of it themselves, so they naturally made it like this.

When Xu Wen came back and saw it, he also thought it was very interesting.

At this moment, the curtain of grass in a cave moved, and a man walked out.

He was sleepy-eyed, his hands were pressed on the belt of his trousers, and it was obvious that he had come out to wake up at night.

As a result, he took two steps and was stunned when he saw Xu Wen next to the fire.

When he got up in the middle of the night, he didn't have a headscarf, revealing much shorter hair than the average person.

He seemed to want to lean over, but he was a little embarrassed, so he stood there for a long time, staring at Xu Wen.

After a while, he muttered something, and crept over to the fire, adding some wood to the fire, and flicking it again, making the fire that had begun to dim even brighter.

Xu Wen was immersed in the building in his hand, completely oblivious to the movement around him.

The man stood for a while longer, until he could no longer stand it, and then silently walked away, untied his hand, and went back to sleep again.

As for whether he can sleep or not, only he knows.

Xu Wen didn't stay up all night, and in the second half of the night he slept for nearly two hours, wiped away a little tiredness, and went on the road again refreshed.

On the way, while enjoying the scenery along the road, he exchanged learning experiences with his fellow members of the Western Desert team, and thought about the affairs of the Beamless Hall in his mind.

In the second half of the night yesterday, he took out Qin Lianying's codex again and compared it with the scroll of the Beamless Palace.

Before being lured to meet with Luo Da, Xu Wen had been studying the contents of the Codex.

The codex is based on the year when Qin Lianying became a craftsman from an apprentice, from shallow to deep, step by step.

Before Qin Lianying entered the Jingying Mansion, he had traveled too much due to military service and had seen many different buildings.

He was not a conservative man, and these observations are sometimes reflected in the records of his codex.

Qin Lianying's main specialty is mud water masonry, Xu Wen later found out that in fact, his codex also has content about caves, and also mentioned one or two sentences about the beamless hall.

However, the geographical restrictions of the cave are very large, and the pure brick and stone structure of the beamless hall has never become the mainstream, so his codex is not very detailed, but some of the thoughts that come from it have attracted Xu Wen's attention.

Qin Lianying mentioned the problem of bonding masonry.

As we all know, the most common masonry binder in modern times is cement mortar.

But in ancient China, there was no cement in the strict sense, that is, modern cement, and it was more common to have something called "sanhe soil".

As the name suggests, Sanhe soil is a mixture of three components, and the composition of Sanhe soil is not the same in different eras.

The Ming Dynasty was dominated by lime, pottery powder and crushed stone, and the Qing Dynasty had lime, clay and fine sand, as well as lime, slag and sand.

Depending on the need, other ingredients such as brown sugar, glutinous rice milk, pebbles and so on are mixed in the sanhe soil.

There is no era distinction in Qin Lianying's codex, but there are also many different kinds of Sanhe soil, their detailed proportioning schemes, and the scope of application.

Qin Lianying said with some regret in the codex that Sanhe soil can greatly enhance the firmness and stability of masonry, and the only flaw is that it is too expensive. This greatly limits the scope of its application.

If cheaper and better alternatives can be found, masonry may be able to find more and better applications in construction.

At the end of the codex, Qin Lianying also mentioned that he had recently heard that the Hu people had a useful recipe, and it was rumored that the Inner Pavilion was trying to buy it from them.

The handwriting of the place is relatively new, and it feels like something that happened recently.

Seeing this, Xu Wen suddenly thought of the two kerosene lamps with transparent and flawless glass, and his heart suddenly moved.