JP2001323658A - Allocating method and precutting method for building material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To utilize residual materials more effectively as compared with the case when building materials are allocated to each house. SOLUTION: The CAD data for precutting the building materials for each house to be built are stored, and the CAD data for a plurality of houses are integrated. The building materials of the same type are sequenced in the order of the material length, and they are allocated to the materials registered in a stockyard on a computer in the order from the longer material length. The remaining residual materials are additionally registered in the stockyard together with the materials of the standard material lengths. The material lengths of the building materials to be allocated are compared with the material lengths of the residual materials registered in the stockyard, and the residual materials are preferentially used for allocation. When the building materials cannot be allocated to the residual materials, they are allocated to the materials of the standard material lengths registered in the stockyard.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention is suitable for allocating materials stocked in a factory for pre-cutting building materials and performing allocation calculation on a computer to optimize material management. Also, it relates to a method of allocating building materials and a method of precutting.

[0002]

2. Description of the Related Art In a pre-cut system in which cutting and pre-processing of building materials conventionally performed at a building site are collectively performed at a factory, when a user receives an order for pre-cut, a CA is required.
D (computer-aided design) system, production planning,
Arrange building materials by linking systems such as inventory management, order management, shipping management, etc., issue processing instructions to the precut factory,
The processes such as pre-cut processing, stocking and shipping are managed efficiently and centrally. This allows the construction shop to efficiently perform building work using a high-quality building material that has been precisely processed.

[0003]

However, the above-mentioned prior art has the following problems to be solved. At the pre-cut factory, when an order is received from a construction shop,
Convert the design drawings of the building into CAD data. This CA
Based on the D data, a building material to be precut is selected. In the case of a structural material of a wooden building, the CAD data includes information such as tree species, grade, width, and height. Based on these data, the type of the material to be precut is determined. Further, the number of used materials is calculated, and a procedure for arranging the used materials before the start of the precut is determined.

[0004] In order to calculate the number of materials used, a computer executes a simulation of allocating necessary structural materials on the materials. In the assignment simulation, first, assignment (wood cutting) is started in order from the longest structural material to a material having a standard material length. For example, after allocating a 2.3 m structural material to a 4 m material, 1.7 m remains as a residual material. The following structural materials are allocated including the remaining materials.

[0005] In this manner, the allocation can be performed with little waste. However, even with such a procedure, a relatively large amount of residual material is still discarded as unnecessary material, and there is a problem that it is contrary to the demand for reducing the amount of waste in consideration of environmental issues. Further, there is a problem that if waste occurs in the material, it is against the demand for reducing the production cost.

[0006]

The present invention employs the following structure to solve the above problems. <Configuration 1> For each house to be built, CAD data created for pre-cutting the building material of the house is stored, and the CAD data for a plurality of houses is collectively collected. A method of allocating building materials, comprising allocating materials registered in a stock yard on a computer in a predetermined order.

<Structure 2> A method for allocating building materials according to Structure 1, wherein a plurality of houses that collectively store the CAD data include houses with different specifications.

<Structure 3> In the method for arranging building materials according to Structure 1 or 2, the building materials of the same type displayed in the collective CAD data are ranked in the order of their material lengths, and the materials having the longer material lengths are ranked. Allotment is performed in order, and the remaining materials after the allocation of building materials to the materials registered in the stock yard are additionally registered in the above stock yard together with the standard length material, and the remaining materials are registered in the stock yard First, the length of the building material to be allocated next is compared with the length of the remaining material registered in the above stockyard. If the length is less than the length of the remaining material registered in the stockyard, assign the building material to be allocated next to the remaining material, otherwise use the standard length material registered in the stockyard. Then you should assign Split dipped method of building material which is characterized by allocating the building materials.

<Structure 4> In the construction material allocating method described in Structure 3, when there are a plurality of standard material lengths,
A method of allocating building materials, wherein priorities are assigned to standard material lengths in a predetermined order, and building materials to be allocated next are allocated in order from a material having a standard length having a higher priority.

<Structure 5> For each house to be built, CAD data created for pre-cutting the building material of the house is stored, and the CAD data for a plurality of houses are collectively used for each house. A precutting method for building materials, comprising: allocating building materials to materials registered in a stock yard on a computer in a predetermined order, and printing a house identification mark on each product precut based on the allocation.

<Structure 6> In the precut method for building materials described in Structure 5, an identification code corresponding to a stockyard on a computer is printed on the remaining material after the precut,
A method for precutting a building material, wherein the remaining material is stored in an actual stockyard corresponding to a stockyard on a computer.

<Structure 7> For each house to be built, CAD data created for pre-cutting the building material of the house. The displayed materials of the same type are ranked in the order of their length, and the assignment is performed in ascending order of the material length. The process of additionally registering the remaining material in the above-mentioned stockyard together with the material of the standard length, and if the remaining material is registered in the stockyard, first, the length of the building material to be allocated next and the above stock Compare the length of the remaining material registered in the yard,
If the length of the building material to be allocated next is less than or equal to the length of the remaining material registered in the stock yard, the next building material to be allocated is allocated to the remaining material. A computer-readable recording medium recording a computer program for executing a process of allocating a building material to be allocated next to a material having a standard length registered in a yard.

<Configuration 8> For each house to be built, CAD data created for pre-cutting the building material of the house is stored, and the CAD data of a plurality of houses is collectively used for each house. An arithmetic processing unit that allocates building materials to materials registered in a stock yard on a computer in a predetermined order, a precut device that precuts the building materials based on the allocation data output by the arithmetic processing device, and a precut A preprinting system for building materials, comprising: a printing device for printing a house identification display on each of the finished products.

<Configuration 9> For each house to be built, CAD data created for pre-cutting the building material of the house is stored, and the CAD data for a plurality of houses is collectively used for each house. A process of allocating building materials to materials registered in a stock yard on a computer in a predetermined order;
A computer-readable recording program for executing a process of executing control for precutting the building material based on the allocation data output from the arithmetic processing device and a process of printing a house identification display on each of the precut products. Possible recording medium.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below using specific examples. In general, custom-built wooden buildings are characterized by a very large number of types of building materials used and various dimensions of the building materials for each house to be built. The pre-cut factory accepts pre-cut orders for building materials of such a variety of buildings at any time. Previously, CA was
D data is created, and using the CAD data, necessary building materials are listed for each house, and a process of allocating each building material to a material having a standard length has been performed. In the present invention, utilizing the fact that the dimensions and the like of the building materials of each house for which an order has been received are varied, a process is performed in which CAD data created by receiving orders for a plurality of houses are collectively assigned to a material having a standard length.

In the case of mass-produced products that always use building materials of a certain standard, building materials of as many houses as possible are collectively allocated to materials of standard length according to the forecast of orders, and cutting of building materials is performed in advance. By doing so, it is possible to make the most of the materials used. However, it is difficult to use such mass production technology for pre-cutting building materials for custom-built buildings whose design details cannot be predicted in advance. In the present invention, for each house to be built, CAD data created for pre-cutting the building material of the house is stored. Each piece of CAD data has unique contents. Then, for example, the CAD data of several houses near the delivery date when the order is almost fixed are bundled, and the allocation process is executed in the following procedure.

FIG. 1 is a schematic operation explanatory view of the method for allocating building materials according to the present invention. In the figure, for example, based on the design drawings 1 and 2 of the residence A and the residence B, the CA for the residence A is stored in the storage device 3.
It is assumed that D data 4 and CAD data 5 for house B are stored. These CAD data 4 and 5 are data used for pre-cutting the building materials of House A and House B at a pre-cut factory (not shown). Here, before proceeding to the next description, the configuration of the entire precut factory will be described in advance.

FIG. 2 is a block diagram showing the configuration of the entire pre-cut factory. The computer 11 is for performing processing for allocating building materials and other controls in the precut factory. The input / output data 10 used by the computer 11 for the processing of allocating building materials to be described below is shown in a dashed line frame below the input / output data 10. The input / output data 10 includes CAD data 13 based on the design drawing 12.
And a building material data list 6 extracted from the CAD data 13 and an allocation result 9. The design drawing 12
1 corresponds to the design drawings 1 and 2 in FIG. 1, and the CAD data 13 corresponds to the CAD data 4 and 5 in FIG. The stock yard 8 included in the input / output data is data corresponding to the stock yard 20 existing in the precut factory.

The pre-cut step 21 is performed by the computer 11
As a result, when the building material is allocated to any of the materials in the stockyard 8, the allocation result 9 is accepted,
In the step of executing the pre-cut processing, a pre-cut device such as a material transport line and a cutter (not shown) is included. The marking step 22 is a step for printing a mark as described later on the precut material 23 and the remaining material 24, and includes a printing apparatus such as an ink jet printer (not shown).

In the marking step 22, the precut material 2
In 3, the building material identification code and the storage location code are printed.
Thereby, it is displayed which building material each precut material was precut for, and where to store it after the precut. The building material identification code printed on the precut building material clarifies for which house the building material was precut. The worker of the precut factory stores the building materials in the actual stockyard until shipment according to the printed contents. The precut factory includes such a system.

Returning to FIG. 1, according to the present invention, the CAD data 4 and 5 for a plurality of houses are put together, and the building material used for each house is registered in the stock yard 8 on the computer. Assign in order. The building material data list 6 shown in FIG.
This is the data that has been extracted and collected and organized. Specifically, the building material data list 6 is a list in which building materials of the same type displayed in the collective CAD data 4 and 5 are ranked in the order of their material length, and are arranged in ascending order of material length. The above-mentioned house A and house B are individually designed and have different specifications. This is because, in the case of mass-produced products having the same specifications, it is not necessary to separately save the CAD data, and the assignment method is uniform, and there is no need to perform the calculation each time.

Building materials of the same type are building materials that are assigned to the same material. For example, beams designed to use the same wood with the same cross-sectional dimensions are the same type of building material. The allocation process is performed for each building material of the same type. The creation of the building material data starts with attaching a predetermined building material identification code to each beam for the house A extracted from the CAD data 4 for the house A. In correspondence with the building material identification code, data such as the type of each building material, the material length, the cutting length, and the like are included. This data can also be extracted from CAD data 4 for House A. This operation is performed for all the target building materials included in the CAD data 4 and 5.

The type indicates the standard or type of the material. The material length is
It is the length of the building material in the design. The cutting length is the length of a building material obtained by adding a margin of about 15 mm to both ends. Actually, the material is assigned by this cutting length. Information on the material standard, its type, and material length is stored in the stock yard 8 of the storage device 7. This stock yard 8 includes, in addition to the fixed-length materials, residual materials that have been left after the allocation. In addition, the material is purchased in a standard length such as 6 m, 4 m, and 3 m. The material of this standard length,
Hereafter, we call it a fixed length material and proceed with the discussion.

By using the building material data list 6 and the data of the stock yard 8 to execute an allocation process 15 which will be specifically described later, an allocation result 9 as shown in FIG.
Is obtained. The allocation result 9 is data indicating in association with each material of the stockyard 8 each building material to which the building material identification code has been assigned. The material identification code is a code uniquely assigned to the allocated material, and specifies any material in the stockyard 8. In the pre-cutting step 21 shown in FIG.
The material is taken out from 0 and cut at the cutting length of each building material. In the actual stock yard 20 shown in FIG. 2, materials that can be physically and economically stocked are stocked. On the other hand, the storage device 7 of FIG.
In the stockyard 8 inside, in addition to the existing fixed-length materials,
Standard-length materials to be ordered can be stocked.

The building materials are allocated to the fixed-length materials, and the remaining materials after the allocation are stored in a stock yard on a computer.
The remaining material is used for the next allocation process. In order to reduce the amount of waste as much as possible, the remaining materials are used for priority allocation, but long residual materials may still remain.
In this case, after the end of the actual pre-cutting process, the same identification code that was recorded in the stock yard on the computer is printed on the remaining material, then stored in the actual stock yard and used for completely different allocation processing I do.

FIG. 3 and FIG. 4 are data showing the contents of calculations at the time of the concrete laying-out process. The above-mentioned building material data, the remaining material length after the allocating of the building material, the material length of the fixed-length material and the like are listed. This is shown in FIG. The building material data in the figure shows House A and B
It is obtained from CAD data of two houses, and includes building material identification code, type, material length, and cut length. This part is shown in FIG.
5 is a building material data list as described with reference to FIG. On the right side, the remaining material lengths of the remaining materials obtained by the layout processing are displayed in the columns of P, Q, R, and S. On the right side, the length of fixed-length materials to be assigned is displayed. Normally, there are more types of fixed-length materials, but only three types will be described here.

FIG. 5 is a flowchart showing the procedure of the allocation process. Referring to FIG. 3 and FIG.
The method of the present invention will be specifically described according to the following procedure. First, the cutting length of the building material displayed as the first building material "House A 2nd floor hut 33" in the building material data list in FIG. 3 is read (step S1 in FIG. 5). This cutting length is 2709 mm. Since there is no residual material at first, an appropriate one of the fixed-length materials is selected (step S2 in FIG. 5). In the case of a fixed length material, for example, "4m
Since "thing" has the lowest cost, "4m thing" is selected first. Of course, if it is not a length that can be allocated, a longer fixed length material is selected. In step S3, a building material is allocated to the selected fixed-length material, and the remaining material length is calculated (step S3 in FIG. 5). As described above, when there are a plurality of types of standard material lengths, the standard material lengths are ranked in a predetermined order, and the building materials to be allocated next are allocated in order from the standard-length material having the highest priority. In this example, in order to reduce the total cost, prioritization is performed on the basis of the cost of fixed-length materials.

When a building material of 2709 mm is allocated to “4 m”, the remaining material length is 1291 mm. This remaining material length is stored in the stockyard (step S in FIG. 5).
4). In this figure, the data is displayed in the P1 column of the remaining material length. Note that “1” of P1 is a serial number sequentially assigned to the building material data list from the top. In step S5, the cutting length of the building material indicated as "B House 2nd floor hut 1" listed second in the building material data list of FIG. 3 is read.

In step S6, it is determined whether the building material data list is completed. If not, step S7
To determine if there is any remaining material. That is, first, the remaining material is preferentially assigned. This is to make effective use of the remaining material. If there is no remaining material, step S
2 and the processing from step S2 to step S7 is repeated. If it is determined in step S7 that there is a residual material, the process proceeds to step S8, and the shortest remnant material that can be allocated is searched from the residual material. When the assignment is made to the remaining material, the remaining material is highly likely to be discarded, so that the remaining material, that is, the shortest material is selected.

In this example, the remaining material length of P1 is 1291 mm
There is only one thing. The 2254 mm building material of “B House 2F Hut 1” cannot be assigned to this residual material. Therefore, the process proceeds from step S9 to step S2, where a "4 m" fixed-length material is selected as an allocation target, and the process proceeds to step S3 and subsequent steps. In this case, a residual material having a residual material length of 1746 m is generated again. The building material of the next “House B, 2nd floor hut 2” has a cut length of 1799 mm and cannot be assigned to any remaining materials. Therefore, the “4 m” standard-length material is selected as an allocation target, and the process proceeds to step S3 and subsequent steps. The building material of the next “B House 2F hut 3” also has a cut length of 1799 mm.
The length of the residual material P3 generated by the last allocation is 2201m
m, which can be assigned to this.

Therefore, steps S9 to S10
Then, the remaining material P3 is allocated to the remaining material P3, and the remaining material length generated thereafter is calculated. Since this is a residual material obtained by allocating twice to a fixed length material, its length 402 mm is displayed in the column Q. In addition, the remaining material after the assignment three times is displayed in the column of Q. These indications are for readability only,
Another arrangement method may be adopted for the internal arithmetic processing of the computer. The length of the building material of the next “B House 2F hut 4” is also 1
799 mm. In this case, "B House 2F Hut 2"
Since there is no remaining material that can be allocated in the same way as
The process proceeds from step S9 to step S2. Hereinafter, since the same cutting material of 1799 mm in length is continuously allocated,
A similar process is repeated. When the allocation of the building materials of the “house A second floor hut 39” is completed, the building material of the “house B second floor hut 9” having a cut length of 1673 mm is allocated.

At this stage, the remaining materials are P1, P2, Q
4, Q6, Q8, Q10, Q12, Q14, Q16, P
This is displayed in column 17. When arranged in short order,
Q4, Q6, Q8, Q10, Q12, Q14, Q16,
P1, P2, and P17. In step S8, a search is made for the shortest of these remaining materials to which a building material of 1673 mm can be allocated. As a result, 1746 mm of Q2
To allocate to the remaining materials. When a 1673 mm building material is allocated to a 1746 mm residual material, a 73 mm residual material is generated. This remaining material is displayed in Q18.

The building material of the next “house A 2nd floor hut 40” is 16
The cutting length is 49 mm. At this time, the shortest remaining material that can be allocated is P17 2201 mm.
Therefore, when allocating to this residual material, a residual material of 552 mm is generated. In the allocation of building materials for the 21st “house A 2nd floor hut 41”, a process of using the remaining material generated immediately before the 20th for the next allocation is performed. In the case of the building material of the 21st “house A, first floor hut 4”, the cut length is 1194.
mm, the allocation is performed using the remaining material of P1 of 1291 mm.

At the 23rd “B House 2F hut 10”, the cut length is 889 mm, so the 1312 mm residual material of Q21 is used. Thereafter, the allocation is performed up to the 33rd in the same manner, and the processing is terminated. The 28th "A House 2"
The reason for using “3m” instead of “4m” for the allocation of fixed-length materials for the “floor hut 42” is to avoid leaving a long residual material. For example, priority is given to “4m” as a general rule. If it is concluded that it is better to select the target and perform the operation processing to the end, and finally select “3 m”, the operation may be redone. The 31st building material is S27
The 32nd building material used the remaining material of Q4, and the 31st building material used the remaining material of Q6.

When the allocation of all building materials is completed in the manner described above, as shown in the lower right of FIG. 4, if 12 “4 m” and one “3 m” are used, The allocation result that the building materials of the house A and the house B can be precut is obtained. Then, from the contents of FIGS. 3 and 4, a procedure manual indicating which building material is to be allocated to which material and the remaining material is created and sent to the pre-cut step 21 (FIG. 2). Note that FIG.
4 and the data of FIG. 4 may be directly transferred to a computer for controlling the pre-cutting process, and controlled by this procedure.

Each building material after the pre-cut is assigned a unique building material identification code and stored in a real stock yard 20 (FIG. 2). This is because the house identification display included in the building material identification code facilitates management of the pre-cut building materials. That is, even if pre-cut is performed by allocating building materials of houses with different specifications collectively to a common material, sorting of products after the pre-cut is ensured.

FIGS. 6 and 7 are explanatory diagrams of a comparative example. Using these figures, CAs of two houses with different specifications
After collecting the D data, a comparison is made between the amount of waste material generated when the building materials used for each house are allocated and the case where the building materials are allocated separately. FIG. 6 shows an example in which building materials of House A are allocated according to the flowchart of FIG. FIG. 7 shows an example in which building materials of House B are allocated according to the flowchart of FIG. The detailed description of the allocation procedure is omitted because it is the same as the example of FIG. 3 or FIG. 4, but in the case of House A, five “4 m” and one “3 m” are required. In the case of House B, seven “4 m” and one “3 m” are required. In total,
Since 12 “4 m” and two “3 m” are required, compared to the method shown in FIGS.
Extra books are consumed. Since the building materials obtained by pre-cutting are the same, one "3 m" extra waste material is generated.

In the above example, an example in which the CAD data of two houses are collectively executed before executing the allocation process has been described. However, the CAD data of three or more houses may be collected.
In the case of custom-built buildings, changes in the delivery date and design frequently occur individually. Therefore, if the building materials of a large number of houses are allocated in a lump, the materials are likely to be wasted on the contrary when there is a change. Also, since the dimensions of the building materials vary from house to house, 1
If many house building materials are allocated to book materials, sorting products after pre-cutting becomes complicated. Further, even if the CAD data of a large number of houses are collected at once, the effect of material saving does not increase so much only by complicating the processing. therefore,
From empirical rules and practical use, it is preferable to collect CAD data of 2 or more houses and 10 houses or less.

Further, in the above example, the method of allocating the beams of the building has been described. However, the present invention can be widely used for allocating and precutting various building materials of the building. For example, for structural materials, bases, columns, girders, shed bundles, purlins, purlins, etc., for feather pattern materials, tarki, studs, joists, window stands, lintels, etc., for plywood materials, field materials, floor materials, wall materials Can be widely used for pre-cutting of exterior building materials such as siding. In addition, not only in the pre-cut factory, but also in the case where a construction shop allocates building materials to materials stored in a warehouse, the above processing can be used. What is necessary is just to install and use the program which performs the process of FIG. 5 in the computer of a construction company.

The computer used in the above-mentioned specific example includes hardware having a known configuration in which a processor executes a program stored in a storage device. Only the essential parts are illustrated, and detailed description of the hardware is omitted.

Further, any of the above computer programs can be recorded on a computer readable recording medium such as a CD-ROM and installed in the computer, or downloaded into a computer memory through a network. You can also. Further, the program for carrying out the present invention may be executed by a single computer or may be executed by distributed processing of a plurality of computers.

[0042]

The method for allocating building materials according to the present invention described above has the following effects. 1. After the CAD data for multiple houses are collected, the building materials used for each house are assigned to the materials registered in the stock yard on the computer. Thus, there is an effect that the number of cases in which the effective use of the remaining material becomes possible is increased. In particular, in a case where at least one house with different specifications is included, by combining the allocation processing for a plurality of houses, the materials can be used effectively, and waste materials can be reduced. 2. The building materials of the same type obtained from the combined CAD data are ranked in the order of their material lengths, and the materials are assigned in order from the material with the longest material length. The remaining material is registered in the stock yard together with the material of the standard length, and if the remaining material is registered in the stock yard, first, the length of the building material to be allocated next is registered in the stock yard. If the length of the building material to be allocated next is less than or equal to the length of the remaining material registered in the stockyard, the next length should be allocated to the remaining material. If the procedure of allocating the building materials and, in other cases, allocating the building materials to be allocated next to the material of the standard length registered in the stock yard is defined, the computer automatically and efficiently Many kinds It is possible to economically efficient assignment put processing of such building materials. 3. If the house identification is printed on each pre-cut product, even if the building materials of different houses are allotted to the common material collectively and pre-cut is executed, the products can be sorted after the pre-cut. This has the effect. As a result, it is possible to solve the problem of product sorting, which is caused by adopting the batch allocation method for processing of custom-made products. 4. If the remaining materials after the allocation are stored in the stock yard on the computer, there is an effect that the remaining materials can be effectively used for the next allocation process. 5. By printing an identification code corresponding to the stock yard on the computer on the remaining material after the pre-cut and storing it in the actual stock yard corresponding to the stock yard on the computer, it becomes possible to properly manage the remaining material.

[Brief description of the drawings]

FIG. 1 is a schematic operation explanatory view of a construction material allocating method of the present invention.

FIG. 2 is a block diagram showing a configuration of an entire precut factory.

FIG. 3 is an explanatory diagram of data indicating the contents of a calculation at the time of an allocation process.

FIG. 4 is an explanatory diagram of data indicating the content of a calculation at the time of an allocation process.

FIG. 5 is a flowchart illustrating a procedure of an allocation process.

FIG. 6 is an explanatory diagram of a comparative example.

FIG. 7 is an explanatory diagram of a comparative example.

[Explanation of symbols]

 1 Design drawing of Residence A 2 Design drawing of Residence B 3 Storage device 4 CAD data for Residence A 5 CAD data for Residence B 6 Building material data list 7 Storage device 8 Stockyard 9 Assignment result

Claims (9)

[Claims] [Claim 1] For each house to be built, CAD data created for pre-cutting the building material of the house is stored, and the CAD data of a plurality of houses are collectively collected. And allocating the materials registered in a stock yard on a computer in a predetermined order. 2. The method of allocating building materials according to claim 1, wherein a plurality of houses that collectively store the CAD data include houses having different specifications. 3. The method of allocating building materials according to claim 1, wherein the building materials of the same type displayed in the collective CAD data are ranked in the order of their material lengths, and the materials are ranked in the order of the material length. The allocation is performed, and the remaining material remaining after the construction material is allocated to the material registered in the stockyard is additionally registered in the stockyard together with the material of the standard length, and the remaining material is registered in the stockyard. First, the length of the building material to be allocated next is compared with the length of the remaining material registered in the stockyard, and the length of the building material to be allocated next is If the length is less than the length of the remaining material registered in the yard, assign the building material to be allocated next to the remaining material.In other cases, assign the next material to the standard length registered in the stockyard. Building materials to be assigned to Split dipped method of building materials, characterized in that the allocating. 4. The method according to claim 3, wherein, when there are a plurality of standard lengths of the material, the standard lengths are ranked in a predetermined order, and the standard lengths of the standard lengths having higher priorities are determined. A method of allocating building materials, which comprises allocating building materials to be allocated next in order from material. 5. For each house to be built, CAD data created for pre-cutting the building material of the house is stored, and the CAD data for a plurality of houses is collectively collected before the building material used for each house is stored. Allocating materials registered in a stock yard on a computer in a predetermined order, and printing a house identification mark on each product precut based on the allocation. 6. The method according to claim 5, wherein an identification code corresponding to the stock yard on the computer is printed on the remaining material after the pre-cut, so that the actual stock corresponding to the stock yard on the computer is printed. A method for precutting a building material, comprising storing the remaining material in a yard. 7. For each house to be built, CAD data created for pre-cutting building materials of the house, a process of batching CAD data of a plurality of houses, and a process of displaying the CAD data in the batch CAD data. A process of ranking construction materials of the same type in the order of their length, and executing the assignment in ascending order of length, and the remaining material remaining after the assignment of the building materials to the materials registered in the stockyard. Is added to the stockyard together with the material of the standard length, and if the remaining material is registered in the stockyard, first, the length of the building material to be allocated next and the stockyard If the length of the building material to be allocated next is less than or equal to the length of the remaining material registered in the stock yard by comparing with the registered material length, then the next material is allocated to the remaining material. To split the building materials In other cases, a computer-readable recording medium recording a computer program for executing a process of allocating a building material to be allocated next to a material having a standard length registered in a stockyard. 8. For each house to be built, CAD data created for pre-cutting the building material of the house is stored, and the CAD data for a plurality of houses is collectively stored. An arithmetic processing unit that performs an allocation process on materials registered in a stockyard on a computer in a predetermined order; a precut device that precuts the building material based on the allocation data output by the arithmetic processing device; A precut system for building materials, characterized in that each product is provided with a printing device for printing a house identification display. 9. For each house to be built, CAD data created for pre-cutting the building material of the house is stored, and the CAD data for a plurality of houses are collectively collected. A process of allocating materials registered in a stock yard on a computer in a predetermined order, a process of executing a control of precutting the building material based on the allocation data output from the arithmetic processing unit, A computer-readable recording medium recording a computer program for executing a process of printing a house identification display on each product.