Calculate the lap length of the reinforcement every 9 meters, 12 of the reinforcement lap length

Your question can be divided into two aspects:

One: as a budget. As long as the calculation length exceeds 9 meters, the amount of lap can be added directly.

Second: In the case you are talking about, a lap must be added. Of course, it should also be noted that if your support is large, large enough for the required width, then you can do without this lap.

My question is, whose 9 meters is this 9 meters per 9 meters? );What you say by 9 meters is the effective usable length of the rebar is 9 meters. What is exceeded is the amount added by the lap.

The tip for you is that sometimes the ** steel bar has 12 meters, in this case, you can do two schemes.

Generally, the amount of steel joints that appear as a budget is calculated as a 9 meters, and if the ** is 12 meters, it depends on what people think.

A lap of 9 meters is the length between the axes and then the actual length of the reinforcement with an anchorage length of more than 9 meters. The lap length of the steel bar is used for the lap of more than 10 steel bars, and the steel bars greater than ten are generally 9 meters, so the lap needs to be calculated when calculating. This is also the practice of actual construction on site, and the actual construction of this situation is a design of steel bars.

Every 9 meters of a lap, refers to the length of the steel bar is 9 meters; Therefore, when calculating the amount of reinforcement, as long as the length of the reinforcement calculated according to the rules is greater than 9 meters, a lap joint is added.

The blanking length is calculated by the outer skin, and the budget (settlement) length is calculated by the axis. If the length of the steel bar is greater than the fixed length, it is necessary to set lap joints (some components are welded or mechanically connected), and the column components are connected by lap joints or welded mechanical connections according to the natural layer.

As long as it is more than 9 meters, it can be calculated.

The lap length is uniform.

Field Gauge Calculation Method:

1. Lashing lap, at 1 6 places of the height of each floor above and below the floor slab, the column width and 500mm take the greater value, if the bottom layer is greater than or equal to 1 3 floors high, the steel bar can not be disconnected in this section, the joint ratio of the rigid bar can not be greater than 50%, outside that section, the lap length of the rigid bar is lae, and the distance between the joint and the joint is better greater than. Filial piety.

2. a mechanical connection; The non-connected section is the same as above, and the distance between the connector and the connector is greater than or equal to 35d.

3. a welded connection; The non-connected section is the same as above, and the distance between the joint and the joint rubber hole is greater than or equal to 35d and 500, whichever is greater.

Material requirements: the steel bar must have a factory certificate and quality assurance certificate, the steel bar should be stacked according to the specifications, models, and batches, and witness sampling inspection according to the regulations, please supervise the unit and the construction unit to witness the sampling.

The inspection results are notified in writing to the technical person in charge, and can only be processed and produced after the supervision unit is approved and approved.

There are clear calculation principles in the 11g101 atlas Rolling Zen It's not good to tell you the lap multiple directly, because this number is related to many factors such as concrete strength, seismic grade, environmental category You Chun I don't understand, God can contact me.

Your question is a bit vague, but I'll talk about the calculation method of the field rule, the lap length of the general column reinforcement.

1. Lashing lap, at 1 6 places of the height of each floor above and below the floor slab, the column width and 500mm take the greater value, if the bottom layer is greater than or equal to 1 3 floors high, the steel bar can not be broken in this section, the joint ratio of the rigid reinforcement can not cover Jian Min greater than 50%, outside that section, the lap length of the rigid reinforcement is lae, and the distance between the joint and the joint is best greater than.

2. a mechanical connection; On the branch of the same object in the non-connected section, the distance between the joint and the joint is greater than or equal to 35d3, and the connection is welded; The distance between the connector and the connector is greater than or equal to 35d and 500, whichever is greater.

Specification table of rebar lap length:

According to the national construction standards, there is a calculation formula for the length of the rebar lap, the minimum degree of anchorage. This is calculated in accordance with the specification of GB50204-2002. Among them, it refers to a certain coefficient when the steel bar is lapped, and it refers to its seismic coefficient.

If the calculation method of 03G101-1 is followed, then the lap length of the reinforcement should be equal to the seismic anchorage length. Among them, it also refers to the high talk coefficient of the normal lap length of the reinforcement.

Precautions for rebar lapping

1. It should be noted that the specification of the length of the steel bar binding lap shall not be less than 300mm.

2. The minimum lap length should meet the requirements of the specification, calculated according to the lap ratio, 25, and the coefficient is.

3. After the concrete of the floor slab of the floor slab is poured at the vertical reinforcement binding lap position of the shear wall, the reinforcement joint is set up about 1m upward.

4. The vertical reinforcement binding lap position of the shear wheel force wall should be 12G901-1, which is changed after soliciting opinions, which is conducive to construction, and because it does not involve structural safety, it is not necessary to abandon the practice of 11G101-1.