The calculation of quantities should have a clear idea, which part should be calculated first and which part should be calculated later.
Fully grasp the working procedures, sub objectives and contents of quota.
When the drawing is thrown, it will prove that the drawing recognition is completed and the budget is completed.
4.
Independence first and then the whole.
Good drawing recognition ability.
Can quickly find the required data through multiple drawings, can find the contradictions and errors in the drawings, can outline the structure of each detail in your mind, and so on.
When calculating, you can first see which part can be referenced to other parts, and the most referenced part takes precedence.
Small experience in engineering quantity calculation: 1.
After the calculation of quantities of concrete and reinforced concrete works in division 5 and doors and windows works in Division 6, the wall masonry quantities can be calculated by using the calculation data.
At this time, the wall masonry items can be listed first, and the calculation of quantities can be slowed down temporarily.
After the quantities are calculated, the drawings will be recognized.
(4) Calculate according to the numbering sequence of positioning axes on the plan.
Drawings have certain rules.
Good drawing recognition ability requires to quickly establish the spatial impression of components and buildings.
This method is applicable to the calculation of quantities of interior wall, interior wall trench excavation, interior wall foundation and interior wall decoration.
Calculate according to the quota sequence and calculate the quantities according to the arrangement sequence of divisional and subdivisional items in the local quota, that is, starting from the first item of the first division of the quota and referring to the construction drawings, in case of any items listed in the quota in the construction drawings, calculate the quantities according to the calculation rules of the divisional quantities.
If the calculation data of some items are related to the project data of other divisions, list the items first, and calculate the quantities after the calculation of the quantities of relevant items is completed.
The main meaning is to calculate the independent without mutual deduction first, and then the complex deduction relationship.
Only in this way can we accurately make the itemized budget and calculate the corresponding quantities, reasonably apply the unit price, and prevent errors such as missing calculation, re calculation and wrong set.
3 draw up a regular sequence of calculation according to the drawings (1) calculate in a clockwise direction, starting from the upper left corner of the plan and in a clockwise direction.
The representation method of structural construction drawings has developed from the traditional separation type to the beam and column table in South China, and then to the current flat method.
3.
2.
For example, based on the length of the center line of the outer wall, the related subdivisional quantities can be calculated..
It is best to calculate the installation from large end to small end according to the system, or from small diameter to large diameter.
At the same time, all accessories corresponding to the same caliber are listed.
Control a large number and reduce the amount.
This method of arranging and calculating the order of quantities according to quota can effectively prevent missed calculation and recalculation for beginners.
1.
3.
Make overall arrangement for calculating quantities.
2.
During the study of drawings of various disciplines, the intention of designers and the expression contents of drawings shall be understood at any time, and the design changes that have occurred before construction shall also be known well.
It is recommended to list items in the order of list number or quota number, so as to avoid missing items.
The budget is completed with the in-depth modification and adjustment of map reading on the basis of controlling the total amount.
Determine what to calculate according to each part, and know what to know according to the quota sub items and calculation rules.
Fully grasp the working procedures and sub objectives of the quota, including the contents.
For the external wall located on axis A, the axis length is ① ~ ②, which can be marked as a: ① ~ ②。 This method is applicable to the calculation of quantities of internal and external wall trench excavation, internal and external wall foundation, internal and external wall masonry, internal and external wall decoration, etc.
Only look at one map at a time and try not to look at one map for the second time.
For example, when calculating wall masonry, the project is in the fourth division of the quota, and the quantities of wall masonry are: (length of wall body) × Height – door and window opening area) × Wall thickness – volume of concrete and reinforced concrete components embedded in the wall + stack, wall attached flue, etc.
Making overall arrangement for calculating quantities and improving calculation efficiency can save a lot of time and energy.
site leveling, trench excavation, foundation cushion, masonry foundation, backfill, wall building, doors and windows, reinforced concrete floor installation, roof waterproof, external wall plastering, floor, internal wall plastering, painting, etc.
2.
(2) It is calculated in the order of horizontal first and then vertical, top first and then bottom, left first and then right.
It is calculated from left to right or from top to bottom in the horizontal and vertical direction on the plan.
Finally, summarize the deduction relationship required by the calculation rules, and read the whole drawing to see if there is any missing calculation, repeated calculation, calculation error, etc.
2.
In fact, it is not called drawing recognition, but calculating the quantities while looking at the drawings.
From the order of map reading: underground first and then on the ground; First structure, then architecture; First indoor, then outdoor; First, the main body, then the roof, etc.
In the process of budgeting, the main line is the process of drawing recognition, that is, to recognize a drawing, make a drawing, finish a drawing and throw a drawing.
Until the drawing can accurately calculate the quantities.
Secondly, according to the above principles, the drawing is divided into five parts: underground, main structure, main building, roof and outdoor sporadic.
If the items listed in the quota are not in the construction drawing, ignore them and continue to look at the next item.
(3) It shall be calculated according to the numbering sequence of structures and accessories on the drawing, and marked on the drawing.
Therefore, when making a budget, you must know the map and master a certain order of map reading.
At this time, it can be calculated according to the axis sequence on the drawing, and its parts can be shown in the axis number table.
For complex projects, when calculating walls, columns and internal and external painting, it may be repeated or omitted only according to the above sequence.
First of all, there are several principles for map reading and Budgeting: 1.
There are various representation methods, and the design institute also has some customary representation methods.
According to the numbering of various structures and accessories, such as columns, beams and plates, it shall be calculated according to the numbering of columns Z1, Z2, Z3, Z4, beams L1, L2, L3, plates B1, B2, B3, etc.
The quantities shall be calculated according to the construction sequence, i.e.
