JP2016162236A - Ceiling design support system and ceiling engine frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ceiling design support system and a ceiling engine frame for supporting efficient design of a ceiling.SOLUTION: A ceiling engine frame 20 comprises: truss structure girders 25 arranged according to positions of poles 11; beams 27 orthogonal to the girders 25; and beam support members 30 for connecting lower chords 25b of the girders 25 and the beams 27. A control unit of a ceiling design support system executes acquisition processing of a design condition and executes design processing. The control unit executes specification processing of a sensing zone, and temporary storage processing of the number of sensors. The control unit adds the beam support members 30 and then executes the design processing again, if heights of the beams 27 specified in the design processing is equal to or higher than a projection height reference value.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a ceiling design support system that supports design of a ceiling frame using a small beam and a ceiling frame using a beam.

  Disaster prevention equipment installed in buildings is arranged according to disaster prevention equipment information and legal information. Therefore, a technique for efficiently performing this layout design has been studied (see Patent Document 1). In the technique described in Patent Document 1, a storage device storing fire detector information as disaster prevention device information and automatic detector arrangement means are used. The detector automatic arrangement means displays a plan view of the building on the display, and calculates the number of fire detectors arranged according to the legal information according to the area of the room where the fire detectors are arranged. Further, the detector automatic arrangement means automatically arranges the symbols of the fire detector on the plan view according to the arrangement pattern based on the arrangement number.

JP-A-11-250370

  The technology described in Patent Document 1 installs a detector based on legal information such as disaster prevention equipment information and the Fire Service Law after the building structure is completed. In the Fire Service Act, when there is a beam protruding beyond a predetermined value from the wall or mounting surface of a room, the sensing area is divided by the beam, and it is necessary to install a sensor in each sensing area. In this case, the number of sensors increases, and the construction cost increases.

  The present invention has been made in view of the above-described problems, and provides a ceiling design support system and a ceiling frame for supporting a ceiling design in consideration of a detector cost for disaster prevention.

  A ceiling design support system that solves the above problems is a ceiling design support system that includes a control unit that supports design of a ceiling frame using a small beam, and the control unit executes a design process of the ceiling frame. By calculating the blame of the beam, the protrusion height reference value that defines the sensing area of the sensor arranged on the ceiling to be designed is specified, and the calculated flare of the beam is the protrusion height reference If the value is greater than or equal to the value, the design process is executed again after changing the configuration of the beam so that the beam is smaller than the protrusion height reference value. As a result, it is possible to reduce the size of the beam that divides the sensing area for installing the sensor, so secure a wide sensing area and design a ceiling frame that takes into account the cost of the sensor for disaster prevention. Can do.

  A ceiling frame that solves the above problem is a ceiling frame that uses a small beam, and in the design of the ceiling frame, the fault of the beam is calculated, and the calculated beam error is the ceiling of the ceiling frame. If the projection height reference value that divides the sensing area of the sensor arranged in the sensor is equal to or greater than the projection height reference value, the configuration of the beam is changed so that the beam is smaller than the projection height reference value. It is preferable to design. Thus, by redesigning the beam configuration so that the beam length is smaller than the protrusion height reference value, the sensing area is not divided based on the Fire Service Law, and a wide sensing area can be secured.

  In the ceiling frame, by attaching a beam supporting member for supporting the beam, the beam is made smaller than the protrusion height reference value, and the beam supporting member is connected to the beam. It is preferable to connect and attach to the large beam and the small beam. Thereby, since the small beam is supported not only by the large beam but also by the small beam supporting member, the bending moment and deformation in the small beam can be reduced. Therefore, the blame can be reduced.

  ADVANTAGE OF THE INVENTION According to this invention, the design of the ceiling frame in consideration of the detector cost for disaster prevention and the ceiling for it can be supported.

The perspective view explaining the ceiling frame of this embodiment. The expansion perspective view explaining the principal part of the ceiling frame of this embodiment. It is explanatory drawing explaining the effect | action of the force added to the small beam in this embodiment, Comprising: (a) is the schematic of a small beam, (b) is a bending moment figure, (c) is a deformation | transformation figure. The block diagram explaining the structure of the ceiling design support system of this embodiment. The flowchart explaining the process sequence of the ceiling design process of this embodiment.

  Hereinafter, an embodiment embodying a ceiling design support system and a ceiling frame will be described with reference to FIGS. The ceiling frame of the present embodiment is assumed to be used for a building such as a gymnasium or an exhibition hall. Furthermore, on the ceiling frame of the present embodiment, a relatively light roof (for example, a folded-plate roof or the like) having a substantially rectangular planar shape is placed.

  First, the ceiling frame 20 shown in FIG. 1 will be described. The ceiling frame 20 is arranged over the upper ends of the plurality of standing columns 11. The plurality of pillars 11 are connected by a large beam 15. The large beam 15 connects intermediate portions of the adjacent pillars 11.

The ceiling frame 20 includes a large beam 21 that connects the upper ends of adjacent columns 11, and the large beam 21 is arranged so as to surround the ceiling edge of the building.
Furthermore, the ceiling frame 20 includes a plurality of large beams 25 arranged in parallel. The large beam 25 connects the upper ends of the columns 11 facing each other. The large beam 25 is about 2 m. The girder 25 is formed of a truss structure, and includes an upper chord member 25a and a lower chord member 25b arranged in parallel, and a diagonal member 25c that connects them obliquely.

  The ceiling frame 20 includes a plurality of small beams 27 arranged in parallel. The small beams 27 are arranged so as to be orthogonal to the large beams 25. The small beams 27 are arranged at an arrangement interval (span) determined by a design process described later. In the present embodiment, the small beam 27 arranged in the span intersects the large beam 25 at a position corresponding to the node between the upper chord member 25a and the diagonal member 25c and the node between the lower chord member 25b and the diagonal member 25c. Is arranged. In the present embodiment, a beam having a length of about 14 m is used as the small beam 27.

  Further, the small beam 27 of the present embodiment is made of H steel, which is smaller than the protrusion height reference value and substantially the same as the upper chord member 25a of the large beam 25. Here, the protruding height reference value means the height of the protruding portion from the wall or mounting surface (ceiling, etc.) that is considered when determining the sensing area in the Fire Service Act.

In the ceiling frame 20, the lower chord member 25 b of the large beam 25 and the small beam 27 are connected by the small beam support member 30. In the present embodiment, as shown in FIG. 2, the beam support member 30 is disposed so as to connect the lower chord member 25b and the beam 27 at positions facing the nodes of the upper chord member 25a and the diagonal member 25c. Or it arrange | positions so that the node of the lower chord material 25b and the diagonal material 25c and the small beam 27 may be connected. Furthermore, in the present embodiment, two small beam support members 30 are arranged in line symmetry with respect to the large beam 25. Each beam support member 30 is attached to the beam 27 at a predetermined angle (for example, 45 degrees).
A plurality of detectors (not shown) are provided between the ceiling frames 20 in accordance with the Fire Service Law. The sensor is provided for each sensing area corresponding to the type. As this sensor, a heat sensor, a smoke sensor, a flame sensor, or the like can be used.

Next, the action of the force applied to the small beam 27 used in the ceiling frame 20 will be described with reference to FIG.
FIG. 3A is a front view of the small beam 27 as viewed from the extending direction of the large beam 25. In this figure, the configuration of the large beam 25 and the configuration of the small beam 27 are simplified. FIG. 3B is a bending moment diagram of the small beam 27, and FIG. 3C is a deformation diagram of the small beam 27. In FIG. 3B and FIG. 3C, the bending moment and deformation in the absence of the beam support member 30 are shown by dotted lines, respectively. As shown in FIG. 3B, when the maximum bending moment (bending moment at the center) M0 without the beam supporting member 30 is “1”, when the beam supporting member 30 is attached, the maximum bending moment M1. Becomes about 0.3 (1/3 or less). Further, as shown in FIG. 3C, when the maximum deformation amount (the deformation amount at the center) d0 without the beam support member 30 is “1”, the maximum deformation is obtained when the beam support member 30 is attached. The quantity d1 is about 0.1 (about 1/10).

  Next, the configuration of the ceiling design support system 60 used when designing the ceiling frame 20 will be described with reference to FIG. In the present embodiment, the ceiling frame 20 is designed in consideration of the installation of the sensor.

  The ceiling design support system 60 includes an input unit 50 and an output unit 55. The input unit 50 is a means for inputting various types of information, and includes a keyboard, a pointing device, an input interface for acquiring data from a recording medium, and the like. The output unit 55 is a means for outputting various types of information, and includes a display or the like.

  The ceiling design support system 60 includes a control unit 61, a building design condition data storage unit 62, a physical property value data storage unit 63, a part price data storage unit 64, and a design candidate data storage unit 65.

  The control unit 61 includes a CPU, a ROM, and a RAM, and controls processing in the ceiling design support system 60. By executing the ceiling design processing program stored in the storage unit, the control unit 61 functions as a design management unit 610, a design processing unit 611, and a sensing area specifying unit 612.

  The design management unit 610 manages the design of the ceiling frame 20 and executes a process for determining whether or not it is necessary to redesign the ceiling frame 20. When redesigning is performed, the design management unit 610 changes design conditions.

  The design management unit 610 stores a sensing area specifying table and a protrusion height reference value table. This sensing area specifying table stores sensing areas corresponding to “mounting height”, “presence / absence of fireproof structure”, and type of sensor. Here, as the mounting height, any value of less than 4 m, 4 m or more and less than 8 m, 8 m or more and less than 15 m, or 15 m or more and less than 20 m is used.

  In the protrusion height reference value table, a protrusion height reference value associated with the type of sensor is stored. Here, the protrusion height reference value is the size of the protrusion that needs to divide the sensing area.

The design processing unit 611 executes a design process for the ceiling frame 20 in accordance with an instruction from the design management unit 610. The design processing unit 611 calculates the span and fault of the small beam 27 by executing the design process of the ceiling frame 20. For this reason, the design processing unit 611 stores information (for example, a calculation formula) for calculating a necessary beam fault from the bending stress level, the shear stress level, and the deflection in the design process. Furthermore, the design processing unit 611 uses various coefficients used in this calculation formula (allowable stress, cross-sectional performance (cross-sectional area, cross-section coefficient, cross-section secondary moment), dimensional effect coefficient, allowable deflection value, absolute value of allowable deflection, etc.) The data about is memorized.
The sensing area specifying unit 612 executes a process for specifying the area in which the sensor is installed on the designed ceiling frame 20.

  The building design condition data storage unit 62 stores building design condition data used for designing the ceiling frame 20. In this design condition data, data relating to the assumed load capacity of the roof, the size and position of the columns 11 according to the design of the building (the interval and length of the columns 11), the total area of the ceiling, and the like are stored.

The physical property value data storage unit 63 stores physical property value data of members used in the design process. This physical property value is stored in association with the member identifier.
In the member identifier data area, data relating to an identifier (member identifier) for specifying a component material is recorded. In the present embodiment, member identifiers that specify materials used for the large beams 21 and 25, the small beams 27, and the small beam support members 30 (parts) are recorded.

  In the physical property value data area, data relating to the reference strength and Young's modulus of the material are recorded. In the present embodiment, the reference strengths related to compression, tension, bending, and shear are recorded as the reference strength of the material.

  The part price data storage unit 64 stores price data of parts used for the ceiling frame 20. The component price includes a component identifier, a type identifier, a member identifier, a shape, performance, a price, and the like.

Data relating to an identifier (component identifier) for identifying each component is recorded in the component identifier data area.
In the type identifier data area, data relating to an identifier (type identifier) for specifying the type of the part (beam, beam support member, sensor) is recorded.

In the member identifier data area, data relating to an identifier (member identifier) for specifying the material of the part is recorded.
In the shape data area, data relating to the shape of the part and the size of each part is recorded.
In the performance data area, data on the performance (type) of the sensor is recorded for the part (sensor).
In the price data area, data relating to the price of this part is recorded.

  The design candidate data storage unit 65 stores design results in the design process as design candidate data. This design candidate data is recorded every time the design processing unit 611 executes the design process. The design candidate data includes a candidate identifier, a small beam cause, a span, a quantity, a type of sensor, a necessary number of sensors, presence / absence of span change, and presence / absence of a beam support member.

In the candidate identifier data area, data relating to an identifier (candidate identifier) for specifying each design candidate is recorded.
In the beam data area, the span data area, and the quantity data area, data related to the designed beam, span, and quantity are recorded.

In the sensor type data area and the necessary sensor number data area, data related to the type of sensor used in the design and the number of sensors are recorded.
In the span change presence / absence data area, a span change flag for identifying whether or not the span of the beam is changed in this design is recorded.
In the presence / absence data area of the beam support member, a beam support flag for identifying whether or not the beam support member is used in this design is recorded.

  Next, the ceiling design process in the above-described ceiling design support system 60 will be described with reference to FIG.

  First, the control unit 61 of the ceiling design support system 60 executes design condition acquisition processing (step S1). Specifically, the design management unit 610 of the control unit 61 acquires design condition value data used for designing the building from the building design condition data storage unit 62. Here, the design condition value includes the load capacity to be set, the size of the ceiling (total area, each dimension), the interval between the columns 11, and the like.

  Next, the design management unit 610 outputs to the output unit 55 a sensor setting condition screen for specifying the sensor installation area. This sensor setting condition screen includes columns for selecting the installation height of the building to be designed, the presence or absence of a fireproof structure for the main structure of the building, and the type of sensor. Here, the user inputs in each column on the sensor setting condition screen and designates the end of selection. In this case, the design management unit 610 obtains the mounting height, presence / absence of a fireproof structure, and the type of sensor input on the sensor setting condition screen.

  And the design management part 610 specifies the kind of sensor which can be used based on a mounting height and the presence or absence of a fireproof structure using a sensing area specific table. When the sensor input using the sensor setting condition screen is not included in the types of sensors specified using the detection area specification table, the design management unit 610 cannot use the selected sensor. A message to that effect is output.

  On the other hand, when the type of sensor input on the sensor setting condition screen is usable, the design management unit 610 uses the sensing area identification table to identify the sensing area corresponding to the type of sensor. . Furthermore, the design management unit 610 uses the protrusion height reference value table to specify the protrusion height reference value corresponding to the type of the sensor.

  Next, the control unit 61 of the ceiling design support system 60 executes design processing (step S2). Specifically, the design processing unit 611 of the control unit 61 satisfies various allowable values using the design condition values acquired by the design management unit 610 and the data stored in the physical property value data storage unit 63. The fault, span, and the like of the small beam 27 that will be the bending moment and deformation amount are calculated.

  Next, the design processing unit 611 calculates the number of small beams 27 necessary for designing the ceiling frame 20 by using the size of the ceiling, the span and the length of the small beams 27. Specifically, the design processing unit 611 calculates the number of the small beams 27 arranged on the ceiling frame 20 using the size of the ceiling frame 20, the interval between the large beams 25, and the span of the small beams 27.

  In addition, the design processing unit 611 assigns a candidate identifier, and associates the candidate identifier with the calculated small beam 27, the number and span, the presence / absence of the span change, and the presence / absence of the beam support member 30 as design candidate data. Records in the storage unit 65.

  Next, the control unit 61 of the ceiling design support system 60 executes a detection area specifying process (step S3). Specifically, the sensing area specifying unit 612 of the control unit 61 determines whether or not the designed beam is smaller than the protrusion height reference value.

  When the designed beam 27 is not less than the protruding height reference value, the sensing area specifying unit 612 of the control unit 61 divides the acquired total area of the ceiling by the span of the beam 27 to The area between the small beams in the area between the small beams 27 is calculated. Then, the sensing area specifying unit 612 divides the area between each beam by the sensing area corresponding to the type of sensor (rounds up the decimal point), and calculates the number of sensors required between one beam. Then, the sensing area specifying unit 612 calculates the necessary number of sensors by summing up the number of sensors between all the small beams.

  On the other hand, if the designed beam 27 is smaller than the protrusion height reference value, the sensing area specifying unit 612 of the control unit 61 uses the acquired entire area of the ceiling as the sensing area corresponding to the selected sensor. Divide by (round up the decimal point) to calculate the required number of sensors.

  Next, the control unit 61 of the ceiling design support system 60 executes a temporary storage process of the number of sensors (step S4). Specifically, the sensing area specifying unit 612 of the control unit 61 records the type of sensor and the necessary number of sensors in the design candidate data storage unit 65 in association with the candidate identifier.

The following processing differs depending on whether or not the control unit 61 of the ceiling design support system 60 is less than the protrusion height reference value because of the small beam.
When the small beam is greater than or equal to the protrusion height reference value (“NO” in step S5), the control unit 61 of the ceiling design support system 60 determines whether or not the span of the small beam has been changed. Processing is executed (step S6). Specifically, the design management unit 610 of the control unit 61 determines whether or not a span change flag is recorded in the design candidate data storage unit 65. Here, when the span change flag is not recorded, the design management unit 610 determines that the span of the beam is not changed.

  When it is determined that the span of the beam is not changed (in the case of “NO” in step S6), the control unit 61 of the ceiling design support system 60 executes a process for changing the beam span (step S7). Specifically, the design management unit 610 instructs the design processing unit 611 to redesign the span of the small beam 27 associated with the candidate identifier. And the process after a design process (step S2) is performed about the ceiling frame 20 of the shape to which this small beam support member 30 was added. In addition, when the design management unit 610 gives an instruction to change the span of the small beam, the design processing unit 611 is attached to the small beam 27 with a span narrower than the span recorded in the design candidate data storage unit 65. The ceiling frame 20 is calculated. In this case, the design processing unit 611 rearranges the diagonal members 25 c of the large beams 25 so that the nodes of the lower chord members 25 b and the upper chord members 25 a of the large beams 25 correspond to the spans of the small beams 27. In this case, the design processing unit 611 records the design candidate data in which the span change flag is recorded in the design candidate data storage unit 65.

  On the other hand, when it is determined that the beam span has been changed ("YES" in step S6), the control unit 61 of the ceiling design support system 60 executes a process for determining whether or not the beam support member has been added. (Step S8). Specifically, the design management unit 610 of the control unit 61 makes a determination based on whether or not the small beam support flag is recorded in the design candidate data storage unit 65. Here, when the design candidate data including the beam support flag is recorded, it is determined that the beam support member has been added.

  When it is determined that the beam support member has not been added (in the case of “NO” in step S8), the control unit 61 of the ceiling design support system 60 performs a beam support member addition process (step S9). Specifically, the design management unit 610 of the control unit 61 instructs the design processing unit 611 to perform redesign including the small beam support member 30 having the above-described configuration.

  And the process after a design process (step S2) is performed about the ceiling frame 20 of the shape to which this small beam support member 30 was added. When the design management unit 610 instructs the design including the small beam support member 30, the design processing unit 611 designs the ceiling frame 20 in which the small beam support member 30 is attached to the large beam 25 and the small beam 27. To do. Here, as described above, the design processing unit 611 calculates the necessary number of the small beams 27 using the span and the length of the small beams 27 and records them in the design candidate data storage unit 65. In this case, the design processing unit 611 records the design candidate data in which the beam support flag is recorded in the design candidate data storage unit 65. In this case, the design processing unit 611 calculates the beam span regardless of the beam span of the design candidate data already recorded in the design candidate data storage unit 65.

  On the other hand, if the beam is smaller than the protrusion height reference value or if the beam support member has been added ("YES" in steps S5 and S8), the control unit 61 of the ceiling design support system 60 is economical. An effect output process is executed (step S10). Specifically, the design management unit 610 of the control unit 61 calculates the total amount of parts for each design candidate recorded in the design candidate data storage unit 65. Specifically, the price of the part corresponding to the shape, the member identifier, and the performance of the type of the part (beam, beam supporting member, sensor) associated with the same candidate identifier is acquired from the part price data storage unit 64. The total amount is calculated from the acquired price and the number of each member.

  Next, the design management unit 610 rearranges the design candidates in the order of low cost. Then, the design management unit 610 outputs to the output unit 55 an output screen including a list in which costs and design specifications of each design candidate are arranged in this order.

According to this embodiment, the following effects can be obtained.
(1) The ceiling frame 20 of the present embodiment is configured to be smaller than a protruding height reference value that determines a sensing area of a sensor arranged on the ceiling. Thus, the sensing area for installing the sensor is not divided due to the large beam. Therefore, it is possible to install a sensor for disaster prevention with a high degree of freedom in setting the sensing area. And the ceiling frame which considered this installation cost can be designed.

  (2) A small beam support member 30 that supports the small beam 27 and is connected to the large beam 25 and the small beam 27 is attached to the ceiling frame 20 of the present embodiment. Thereby, since the bending moment and deformation | transformation in the small beam 27 can be reduced, the fault of the small beam 27 can be made smaller than a protrusion height reference value.

  (3) In the ceiling frame 20 of the present embodiment, the large beam 25 has a truss structure. The small beam support member 30 is connected to the node of the lower chord member 25b and the diagonal member 25c of the large beam 25 and the small beam 27, or connected to the node of the upper chord member 25a and the diagonal member 25c of the large beam 25 and the small beam 27. Has been. In the truss structure, the node where the force is concentrated is supported by the small beam support member 30, whereby the small beam 27 can be reduced. Further, since the small beams 27 are arranged at positions corresponding to the nodes of the large beams 25 of the truss structure, a design with regularity can be realized.

  (4) In the present embodiment, the control unit 61 of the ceiling design support system 60 determines that the small beam 27 specified in the design process (step S2) is greater than or equal to the protrusion height reference value (“NO” in step S5). First, the span of the small beam is changed and the design process is executed again (step S2). As a result, the span of the small beam 27 can be changed, and the sensing area can be expanded using the small beam 27 smaller than the protrusion height reference value.

  (5) In the present embodiment, the control unit 61 of the ceiling design support system 60 determines that the small beam 27 specified in the design process (step S2) is greater than or equal to the protrusion height reference value (“NO” in step S5). In this case, the small beam support member 30 is added and the design process is executed again (step S2). Thereby, by adding the beam support member 30, the sensing area can be expanded by using the beam 27 smaller than the protrusion height reference value.

  (6) In the present embodiment, the control unit 61 of the ceiling design support system 60 executes design processing, detection area identification processing, temporary storage processing of the number of sensors, and output of economic effects (steps S3 and S4). Thereby, the installation cost in a design candidate can be calculated using the number of small beams and the number of detectors, and the costs can be compared.

  (7) In the present embodiment, the control unit 61 of the ceiling design support system 60 specifies the projection height reference value that divides the sensing area according to the mounting height, whether or not the structure is fireproof, and the type of sensor. Thereby, the detection area according to a building or a sensor can be specified.

Moreover, you may change the said embodiment as follows.
The small beam support member 30 of the above embodiment is disposed so as to connect the node between the lower chord member 25b and the diagonal member 25c of the large beam 25 and the small beam 27, or the upper chord member and the diagonal member 25c of the large beam 25. The lower chord material 25b and the small beam 27 corresponding to the nodes are arranged so as to be connected. Here, the arrangement position of the beam supporting member 30 is not limited to this position. For example, the small beam support member 30 may be disposed only at a position where the node of the lower chord member 25 b of the large beam 25 and the small beam 27 are connected. Further, the node of the lower chord member 25b facing the node of the upper chord member 25a of the large beam 25 may be disposed only at a position where the small beam 27 is connected. Further, the diagonal members 25c of the large beams 25 are arranged so as to fit the spans of the small beams 27. Not limited to this, the relationship between the span of the small beam 27 and the node may be changed according to an instruction from the user.

  In the above embodiment, the small beam support member 30 that connects the lower chord member 25b of the large beam 25 having the truss structure and the small beam 27 is used. Even in a large beam not having a truss structure, a ceiling frame provided with a small beam support member that connects the lower part of the large beam and the small beam may be used.

  In the above-described embodiment, the ceiling frame 20 having a substantially rectangular planar shape has been described. However, the ceiling frame 20 may be applied to the design of the ceiling frame 20 having a complicated shape. In this case, the process of specifying the sensing area is repeated according to the shape, and the minimum number of sensors is calculated.

  In the ceiling design process of the above embodiment, the control unit 61 of the ceiling design support system 60 determines the span of the beam when the beam is greater than the protrusion height reference value (in the case of “NO” in step S5). Has been changed (step S6), and it has been determined whether or not the beam support member has been added (step S8). The correspondence for reducing the small beam is not limited to the order of changing the span and adding the beam supporting member. For example, the control unit 61 may reverse the order of the span change determination process (step S6) and the small beam support member addition determination process (step S8).

  In addition, the control unit 61 outputs a selection screen for adding a beam support member and changing the beam span to the output unit, and takes measures to reduce the size of the beam according to the selection on the selection screen. You may make it perform.

Next, technical ideas that can be grasped from the above-described embodiment and other examples will be described below together with their effects.
(A) A design support system including a control unit that supports design of a ceiling frame using a small beam, wherein the control unit has a protrusion height based on a type of a sensor arranged on a ceiling to be designed. Using the height reference value table, a protrusion height reference value that determines the sensing area is specified, and the ceiling frame design process is performed so that the small beam placed on the ceiling is smaller than the protrusion height reference value. Ceiling design support system characterized by executing.

  Therefore, according to the invention described in (a), since the ceiling frame is designed to be smaller than the protruding height reference value that defines the sensing area of the sensor, it is possible to increase the degree of freedom for the section of the sensing area. Can do.

(B) The ceiling frame according to claim 2 or 3, characterized in that the arrangement interval of the small beams is narrowed so that the small beams are smaller than a reference value of the protrusion height.
Therefore, according to the invention described in (b), the small beams can be reduced by narrowing the arrangement interval of the small beams.

  DESCRIPTION OF SYMBOLS 11 ... Column, 15, 21, 25 ... Large beam, 20 ... Ceiling frame, 25a ... Upper chord material, 25b ... Lower chord material, 25c ... Diagonal material, 27 ... Small beam, 30 ... Small beam support member, 50 ... Input part, 55 DESCRIPTION OF SYMBOLS Output part 60 ... Ceiling design support system 61 ... Control part 62 ... Building design condition data storage part 63 ... Physical property value data storage part 64 ... Parts price data storage part 65 ... Design candidate data storage part 610 ... design management part, 611 ... design processing part, 612 ... sensing area specifying part.

Claims (3)

A ceiling design support system having a control unit that supports the design of a ceiling frame using small beams,
The control unit is
By executing the design process of the ceiling frame, the fault of the beam is calculated,
Identify the protrusion height reference value that divides the sensing area of the sensor placed on the ceiling of the design object,
If the calculated beam crossing is greater than or equal to the protrusion height reference value, the design of the beam is changed again so that the beam crossing is smaller than the protrusion height reference value. Ceiling design support system characterized by executing processing. A ceiling frame using small beams,
In the design of the ceiling frame, calculate the blame of the beam,
If the calculated beam is equal to or greater than the projection height reference value that defines the sensing area of the sensor disposed on the ceiling of the ceiling frame, the beam is less than the projection height reference value. The ceiling frame is characterized by being redesigned by changing the configuration of the beam. By attaching a beam supporting member that supports the beam, the beam beam is caused to be smaller than the protrusion height reference value,
The ceiling frame according to claim 2, wherein the small beam support member is connected to and attached to a large beam connected to the small beam and the small beam.

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