Urgent????? How to calculate the engineering quantity of crown beam and reinforcement?

The center span of the bearing is L, the width of the support is HC, the diameter of the main reinforcement in the support is D, and the thickness of the protective layer.

For BHC, anchorage length.

is lae, and d is the diameter of the reinforcement where it is located.

1) Upper through rib 2 18

Single length = LHC-2*BHC-2*

2*15*d

Total length = single branch length * 2

2) The lower stressed longitudinal bar.

Single length = LHC-2*BHC-2*

2*15*lae

Total length = single branch length * 2

3) Anti-torsion band N2 12

Single length = L-HC

2*15*d

Total length = single branch length * 2

4) Left corner ribs.

There is only 1 root, and the remaining 2 are through ribs).

Total length = (l-hc) 3

15*d5) right corner bar (only 1 in the first row, the remaining 2 are through ribs, and there are 2 in the second row).

First row length = (l-hc) 3

15*d second row length = (l-hc) 4

15*d total length = first row length.

Second row length *26) stirrups.

Single branch length = (number of branches = (L-HC-2*1).

Total stirrup length = single length * number of threads.

Reinforcement summary: the total weight of reinforcement below 10.

m (in kilograms).

Total length of all bars (in m)*

Finally, the kilogram is converted to a ton, leaving 3 decimal places.

According to the drawings of the crown beam.

Rebar weight = number of rebar * weight of a single rebar * length of crown beam.

The crown beam is generally used on the top of the pile for foundation pit enclosure. At the top of the foundation pit enclosure pile, in order to ensure that each pile forms an overall support system, each pile needs to be connected with each other, and a connecting beam is arranged at the top of all piles (the horizontal support that needs to be set is supported at the part of the beam). Because the excavation of the foundation pit is similar to an inverted crown and this beam is just above the crown, the construction site is commonly known as the crown quantity.

Precautions for the construction of crown beams.

When making steel bars, they should be cut in strict accordance with the drawings and specifications and standard atlases to ensure that the specifications, anchorage lengths, stirrup sizes, and spacing of steel bars meet the requirements; When the steel bar is tied, the position line of the steel bar should be drawn first to ensure that the position of the steel bar is accurate.

The length of the reinforcement binding connection conforms to the requirements of the specification and the drawing, for the use of double-sided lap welding, the process inspection should be carried out before the construction of the reinforcement project, and according to the different types of reinforcement in each construction stage for inspection, the welding should be ensured that the welding ribbon is full, do not damage the reinforcement body, and the double-sided lap length is not less than 5d.

Rebar weight = number of rebar Weight of a single rebar Length of crown beam Example: 4 16 Rebar weight = 4 16 16 Length of crown beam stirrup weight = number of stirrups Weight of a single stirrup (stirrup length Stirrup spacing + 1) Stirrup perimeter.

Example: 2 8@200 stirrup weight = 2 8 8 stirrup length stirrup circumference.

The total engineering quantity is added according to the drawing, and the square length of the radius of the reinforcement is 7800 = the weight of the reinforcement (kg), and the radius and length are expressed in meters.

The drawings are shown in the theoretical length, when there is a bending, the cutting of the material must also add the processing length (this is explained in the construction manual), after the calculation, but also add the loss, because it is impossible for each steel bar to be exactly that long. Of course, if you want to make a budget, you can calculate the processing length into the loss.

Rebar weight = number of reinforcing bars Single rebar weight Crown beam length Example: 4 16 .

Rebar weight = 4 16 16 crown beam length.

Stirrup weight = number of stirrups Weight of a single stirrup (stirrup length stirrup spacing wild + 1) stirrup perimeter example: 2 8@200 .

Stirrup weight = 2 8 8 stirrup length stirrup circumference.

Rebar weight = number of reinforcing bars Single rebar weight Crown beam length Example: 4 16 .

Rebar weight = 4 16 16 crown beam length.

Stirrup weight = number of stirrups Weight of a single stirrup (stirrup length stirrup spacing + 1) Stirrup perimeter example: 2 8@200 .

Stirrup weight = 2 8 8 stirrup length stirrup circumference.

It is recommended that you seek professional information about this.

The design style of the design concept of reinforced concrete structure, the basic principle of modern Chinese is to use all its own materials and mix them evenly.

I don't know, I don't know, I don't know, I don't know, I don't know, I don't know.

28 theoretical weight of steel bars, 14 theoretical weight of steel bars.

Multiply by 24 times (crown beam length minus protective layer plus lap length) crown beam is generally continuous, not anchored by wall retaining pile as support, and bent horizontally at the corner. The single stirrup algorithm on the textbook is the beam cross-sectional circumference minus 8 times the protective layer doubled d, but the bending adjustment value is not a fixed value, and the blanking length is plus the hook to reduce the bending bending

Are you doing construction cutting or cost budget and final accounting?

28 theoretical weight of steel bar, 14 theoretical weight of steel bar multiplied by 24 times (crown beam length minus protective layer plus lap length) crown beam is generally continuous, not anchored by wall pile as support, horizontal bending at the corner. The single stirrup algorithm on the textbook is the beam cross-sectional circumference minus 8 times the protective layer doubled d, but the bending adjustment value is not a fixed value, and the blanking length is plus the hook to reduce the bending bending

Beam reinforcement, main reinforcement, diameter 25, (beam length + anchorage length * 2) * 8 * 2 = length.

Diameter 16, (beam length + anchorage length * 2) * 8 = length.

Stirrups, diameter 10, limb hoops, (800+600-4*protective layer)*(4+2 3)[length]*(beam length 100)[number].

Note, the anchorage length, not specified in the drawings according to the G101-1 atlas.

600 times 800 in multiplying the beam length.

Look at what you calculate, don't double the calculation, the general part of the beam is calculated into the plate.

The picture is not very complete, what does the 1-3 axis mean.