Put a reinforced concrete bridge in the house of aerated concrete? be careful

Hello.

Article was born spontaneously. I pass the day before yesterday by the cottage settlement. In the eyes rushed w / w jumpers over the windows of one house of aerated concrete. There will definitely be a problem in the future.

No, I do not want to start a story about how the wiring errors lead to the collapse of the house. Concrete has a good margin of safety. Overlap on the head fall rarely 😊. But behind his modest career as a designer, I had to make more than a dozen reinforcements. Just be careful.

Not all jumpers "sausage"

There are different kinds of serial jumpers and they are reinforced in different ways. Few people pay attention to it. However, the difference is important

Most modern products we call "sausage". Within these fittings are equally laid along the entire length. If the jumper is long, it can be cut at any place (like a sausage). when laying important to sustain the minimum bearing. Increase can be as much as you need. The bearing capacity is not affected.

There are a series of bridges with additional reinforcement priopornyh sites. They are often found when buying b / ear products with old objects. Yes, and some concrete factories they are still pouring. This is the case when "porridge oil spoil."

Priopornye zone such articles reinforced with reinforcement. On the border of the opening it works to cut. Once you have relied on the wall too long section (usually the limit of 230-250 mm), the boundary of the greatest load falls to less zaarmirovannuyu part. Since there are cracks. And if the pressure is too large, concrete "cuts." Override a jumper two windows with "column" (pier) in the middle too, is impossible.

Do not overload the aerated

all just here. If on top of the bridge do not plan to prop up the floor slab, with blocks CBC nothing bad will happen. Of course, provided that they are intended for the construction of walls, not the cheapest D350.

The exception may be too wide openings. But it is very rare.

When the jumper has to a large load on the ceiling or beams, concrete beneath it needs to be strengthened. The simplest solution - 2-4 number of full-bodied red brick under the support. They redistribute the load and eliminates cracking units.

Do not overload the bridge

When bridges are slab, they account for too much of the load: the walls of the overlying floor slabs themselves and all that they are.

If possible, spread plates so that they were lying on the blank walls (no doors and windows). If not, we select only the jumper of convenience.

Note variants Laying nets I have intentionally omitted. When it is done correctly, all with loads of problems disappear by themselves. Laying nets but too often turn into a massive bridge cold under the ceiling. But that's another story ...

If the article was helpful, please send me a couple of PGSa cubes with your object. Most house should be built. I'm kidding, stop and Laika 👍. Thank you for reading.