Hello, everyone

This is Enta.

Do you know the basic principles of rebar installation?

You know how sometimes they pour concrete here, but not there?

 

As long as the director is aware of the situation, there’s no particular problem, but there are often times when I wonder, “What should we do about this?” or,

There are times when you can’t really say anything until you check with the government office, right?

What do you do in situations like that?

That's the point.

 

In the case of rebar insertion work, the basic question is: How many bars are installed in the analysis cross-section (standard cross-section)?

That's it!

For example, suppose a standard cross-section shows five rebar inserts.

Generally speaking, the starting point is about 0.5 m to 1.0 m below the legal shoulder.

If there are load-bearing panels, such as green panels, the spacing starts at approximately 1.5 m, and the pitch (interval) varies from approximately 1.0 m to 4.0 m.

 

There are five of them installed at 1.5-meter intervals, and the total length is about 7 meters.

1.5 m spacing × 4 bars + 1 bar (outer) + 1.0 m top and bottom = 7.0 m

 

So, the standard configuration is five rods for this 7.0m length.

However, if there is a section that exceeds 7.0 meters and allows for six piles to be driven, the sixth pile will be driven.

The reason is that if it’s possible to hit the sixth pitch, not doing so would make the situation unstable.

 

Conversely, if there’s too much of something, you just need to reduce it.

Also, depending on the designer, there may be cases where the outer perimeter is also poured, so please follow the design specifications.

 

The part with the "mago" is actually quite difficult.

The number of bars in the vertical direction is determined by the design cross-section.

Please decide whether or not to place a formwork support at every 1.5 meters along the horizontal span. (Assuming the spacing used in the example above)

For example, if the total length is 20 m, 20 ÷ 1.5 m = 13.3 pieces + 1 piece (extra), for a total of 14 pieces.

If we consider only the horizontal direction, we can determine whether a mago can be placed there or not even by extending the line horizontally.

I think managing things vertically is fine, but if you're unsure whether to include something or not, try thinking about it in terms of horizontal expansion.

 

It means it’s okay as long as we submit the agreement based on those layout drawings and concrete placement plans.

There are no specific rules regarding the horizontal direction, so as long as everything adds up, it will generally be accepted.

 

Next, make sure you clearly understand the pouring locations, and mark the areas where voids are to be left in the formwork and the pouring locations in accordance with the drawings.

 

See you later