JP6014320B2 - Structural member - Google Patents

Description

  The present invention relates to a wooden structural member having fire resistance.

  In recent years, wooden structural members having fire resistance have been proposed. For example, Patent Document 1 discloses a fireproof assembly composed of a surface layer, a flame retardant chemical injection layer provided inside the surface layer, and an untreated layer provided inside the flame retardant chemical injection layer. A material is disclosed. When a wooden structural member having such fire resistance is used as a beam, if a through hole is formed in this structural member and the beam is traversed through equipment piping, wiring, etc., the fire resistance of the structural member Will fall.

JP 2008-31743 A

  This invention considers the fact which concerns, and makes it a subject to provide the wooden structural member which can reduce the fall of fire resistance by forming a through-hole.

The invention of the first aspect is a structural member having a wooden member, a through hole penetrating the wooden member, and a flame stop provided around the through hole.

In the first aspect of the invention, in the event of a fire, the flame that has entered the through hole and the entry of heat into the wooden member are suppressed by the flame stop portion, and the flame stop portion stops burning, so a through hole is formed in the wooden member. The reduction in fire resistance due to this can be reduced.

The invention of the second aspect is the structural member of the first aspect, wherein the wooden member is a wooden burning allowance layer that constitutes a surface layer of the wooden member, and a non-burning layer disposed inside the burning allowance layer, And a wooden load support portion disposed inside the flame stop layer.

In the second aspect of the invention, when a fire occurs, the flame ignites the burning allowance layer, and the burning allowance layer burns. The burned burnup layer is carbonized. As a result, the carbonized burnup layer blocks heat transfer from the outside to the inside (load support portion) of the burnup layer. Moreover, the flame and heat approach from the outside to the inside (load support portion) of the burning allowance layer are suppressed by the burning stop layer. Therefore, the temperature rise of the load support part at the time of fire (heating) and after the end of the fire (heating) can be suppressed, and the load support part can be stopped without burning.

The invention of a third aspect is the structural member of the second aspect, wherein the flame stop layer has heat absorption and the through hole penetrates, and the flame stop layer around the through hole has a layer thickness. ing.

In the invention of the third aspect , the heat to enter the through hole is absorbed by the entrance portion of the through hole by the heat-absorbing flame stop layer, so that the heat entering the through hole can be reduced. Further, by setting the thickness of the flame stop layer around the through hole (thickening the thickness of the layer), the heat to enter the through hole can be effectively absorbed at the inlet of the through hole. .

  Since this invention set it as the said structure, the fall of fire resistance by forming a through-hole in a wooden structural member can be reduced.

It is front sectional drawing which shows the beam which concerns on 1st Embodiment. It is an AA arrow line view of FIG. 1, and BB sectional drawing. It is explanatory drawing which shows an example of the assembly procedure of the beam which concerns on 1st Embodiment. It is front sectional drawing which shows the modification of the beam which concerns on 1st Embodiment. It is explanatory drawing which shows an example of the assembly procedure of the beam which concerns on 1st Embodiment. It is front sectional drawing which shows the beam which concerns on 2nd Embodiment. It is CC sectional view and DD sectional drawing of FIG. It is explanatory drawing which shows an example of the assembly procedure of the beam which concerns on 2nd Embodiment. It is front sectional drawing which shows the beam which concerns on 3rd Embodiment. It is the EE arrow directional view and FF sectional drawing of FIG. It is explanatory drawing which shows the effect | action of the beam which concerns on 3rd Embodiment. It is front sectional drawing which shows the beam which concerns on 4th Embodiment. It is front sectional drawing which shows the modification of the beam which concerns on 1st Embodiment. It is front sectional drawing which shows the modification of the beam which concerns on 2nd Embodiment. It is explanatory drawing which shows an example of the assembly procedure of the beam which concerns on 2nd Embodiment. It is front sectional drawing which shows the example which applied 1st Embodiment to the wall. It is front sectional drawing which shows the modification of the beam which concerns on 1st Embodiment. It is front sectional drawing which shows the modification of the beam which concerns on 1st Embodiment. It is a side view which shows the example of the structural reinforcement given to the through-hole which concerns on 1st Embodiment. It is a side view which shows the example of the structural reinforcement given to the through-hole which concerns on 1st Embodiment.

  Embodiments of the present invention will be described with reference to the drawings. First, a first embodiment of the present invention will be described. As shown in the front sectional view of FIG. 1, the beam 10 as a structural member includes a beam main body 12 as a wooden member, a through hole 14 that penetrates the beam main body 12, and a flame stop provided around the through hole 14. And a pipe member 16 as a portion. The through hole 14 has a hole diameter of about 50 to 100 mm and is provided for placement through the equipment piping.

  The beam main body 12 includes a wooden beam core 18 as a load supporting portion for supporting a load, a flame stop layer 20 that surrounds the side surface and the lower surface of the beam core member 18, and a wooden frame that surrounds the side surface and the lower surface of the flame stop layer 20. It is constituted by the burning allowance layer 22. That is, the burning allowance layer 22 constitutes the surface layer of the beam main body 12, the burning stop layer 20 is arranged inside the burning allowance layer 22, and the beam core material 18 is arranged inside the burning stop layer 20. The flame stop layer 20 has heat absorption.

  FIG. 1 shows an example in which the flame stop layer 20 is formed by alternately arranging plate members 30 formed of general wood and plate members 32 formed of mortar. As shown in FIG. 1, the through-hole 14 includes a burning allowance layer 22, a burning stop layer 20, a beam core material 18, a burning stop layer 20, and a burning allowance layer 22 from the right side surface 24 to the left side surface 26 of the beam body 12. It penetrates in order. The beam core material 18 supports a floor slab 28 formed of a refractory member such as reinforced concrete, and the floor slab 28 covers the burning allowance layer 22, the flame stop layer 20, and the upper surface of the beam core material 18.

  The pipe member 16 is formed of mortar, and as shown in FIG. 2A, which is an AA arrow view of FIG. 1, and FIG. 2B, which is a BB sectional view of FIG. Between the outer surface of the pipe member 16 and the inner surface of the through hole 36 formed in the beam core member 18, a filler 34 such as a mortar or a fire-resistant material is filled. The pipe member 16 is disposed inside the beam body 12 (inside the flame stop layer 20).

  The beam 10 is assembled, for example, according to the procedure shown in the front cross-sectional views of FIGS. First, as shown in FIG. 3A, the tube member 16 having a length substantially equal to the through hole 36 is inserted into the through hole 36. Then, the pipe member 16 is disposed in the through hole 36 so that the left and right ends of the pipe member 16 do not protrude from the left and right side surfaces of the beam core material 18.

  Next, as shown in FIG. 3B, a filler 34 is filled between the inner surface of the through hole 36 and the outer surface of the tube member 16 and cured. Next, as shown in FIG. 3C, the members constituting the flame stop layer 20 are bonded to the beam core 18 with an adhesive or the like, and the flame stop layer 20 is surrounded so as to surround the side surface and the lower surface of the beam core 18. Form. At this time, the end face 40 of the tube member 16 is burned and covered with the layer 20 without closing the opening 38 of the tube member 16. Next, as shown in FIG. 3D, the members constituting the burn-off layer 22 are bonded to the burn-off layer 20 with an adhesive or the like, and the burn-off allowance is provided so as to surround the side surface and the lower surface of the burn-off layer 20. Layer 22 is formed.

  Next, the operation and effect of the first embodiment will be described. As shown in FIG. 1, in the beam main body 12, when a fire occurs, a flame ignites the burning allowance layer 22, and the allowance allowance layer 22 burns. The burned combustion allowance layer 22 is carbonized. Thereby, the burning allowance layer 22 which carbonized the heat transfer from the outer side of the burning allowance layer 22 to the inner side (beam core material 18) interrupts | blocks. In addition, the heat that enters from the outer side of the burning allowance layer 22 to the inner side (the beam core material 18) is burned and the layer 20 absorbs it. In addition, the flame and heat approach from the outside of the burning allowance layer 22 to the inside (the beam core material 18) is suppressed by the flame stopping layer 20. By these, the temperature rise of the beam core material 18 at the time of fire (heating) and after the end of the fire (heating) can be suppressed, and the beam core material 18 is not burned but burned off in the burning allowance layer 22 or the burning stop layer 20. be able to. Therefore, at the time of fire (heating) and after the end of fire (heating), the beam core material 18 is kept below the ignition temperature for a predetermined time (for example, 1 hour in the case of 1 hour fire resistance), and the beam core material 18 is burned. It can be made to burn without stopping and function as a structural member.

  Further, in the beam 10, in the event of a fire, the flame that has entered the through-hole 14 and the entry of heat into the beam core 18 are suppressed by the pipe member 16 serving as a flame stop portion, and the flame is stopped by the pipe member 16. 12 can reduce a reduction in fire resistance due to the formation of the through-holes 14. In addition, since the heat to enter the through hole 14 is absorbed by the flame stop layer 20 at the inlet portion of the through hole 14, the heat entering the through hole 14 can be reduced.

  Further, by arranging the facility piping through the through hole 14 formed in the beam 10, it is not necessary to arrange the facility piping under the beam 10, and the floor height of the building can be kept low. Thereby, the construction initial cost related to finishing work, frame work, facility work, etc. can be kept low. In addition, many floors can be provided at the same building height. Further, in a building having the same number of floors, the volume of the building can be reduced and the space controlled by the equipment can be reduced, so that the running cost due to the reduction of equipment / environmental load can be kept low.

  Moreover, since the pipe member 16 as a flame stop part is arrange | positioned inside the beam main body 12, it can prevent that the beauty | look of the beam 10 is impaired by providing a flame stop part.

  The first embodiment has been described above. In the first embodiment, the burning allowance layer 22 and the beam core material 18 are made of wood, but the burning allowance layer 22 and the beam core material 18 may be made of wood. For example, the burning allowance layer 22 and the beam core material 18 may be formed of wood (hereinafter referred to as “general wood”) used in general wooden construction such as Yonematsu, Karamatsu, firewood, cedar, and Asunaro. This general wood may be processed into a prismatic single material, a plurality of such single materials are assembled, and the single materials are bonded together with an adhesive to be integrated.

  Further, in the first embodiment, an example in which the flame-stopping layer 20 is a layer having a heat absorption property has been described. However, the flame-stopping layer 20 is a layer capable of exhibiting a flame-stopping effect by suppressing entry of flame and heat. If it is. For example, the flame stop layer 20 may be a layer having flame retardancy or a layer capable of absorbing heat.

  Examples of the flame retardant layer include a flame retardant chemical injection layer obtained by injecting a flame retardant chemical into wood and making it incombustible. The layer capable of absorbing heat may be formed of a material having a larger heat capacity than general wood, a material having higher thermal insulation than general wood, or a material having higher thermal inertia than general wood. You may form in combination with general wood. In addition, a flame-retardant layer is formed by combining a layer having flame retardancy and a layer capable of absorbing heat (for example, alternately arranging layers having flame retardancy and layers capable of absorbing heat). 20 may be formed.

  Examples of materials having a larger heat capacity than general wood include inorganic materials such as mortar, stone, glass, fiber reinforced cement, and plaster, and various metal materials. Examples of the material having higher heat insulation than general wood include calcium silicate board, rock wool, and glass wool. Examples of the material having higher thermal inertia than general wood include wood such as Selangan Batu, Jara, and Bongoshi.

  Moreover, although the example which formed the pipe member 16 as a fire stop part with the mortar was shown in 1st Embodiment, the pipe member 16 should just be formed with the material which stops for a predetermined time. The tube member 16 is preferably formed of a flame retardant material. For example, the pipe member 16 may be a member having flame retardancy and heat absorption, and a material that enables the formation of the flame stop layer 20 mentioned above can be used. If the pipe member 16 is a member having heat absorbability, it is possible to improve the flame-stopping effect of the pipe member 16 as the flame-stopping portion by absorbing the heat that has entered the through-hole 14.

  Moreover, it is good also considering a fire stop part as a fireproof paint. That is, the flame stop portion may be formed by applying a fireproof paint to the inner surface of the through hole 36 formed in the beam core 18. Moreover, you may form the pipe member 16 by fiber reinforcement mortar (The mortar reinforced by mixing a synthetic resin, steel fiber, etc.).

  Further, a wooden burning allowance layer 44 may be formed inside the pipe member 16 as a beam 42 shown in the front sectional view of FIG. The burning allowance layer 44 can use the same material as the burning allowance layer 22. If it does in this way, the carbonized burning allowance layer 44 interrupts | blocks the heat transfer and oxygen supply from the outer side of the burning allowance layer 44 to the inner side (beam core material 18) by the combustion allowance layer 44 which burned and carbonized. Further, the pipe member 16 absorbs heat that enters from the outer side of the burning allowance layer 44 to the inner side (the beam core material 18). Further, the pipe member 16 prevents the flame and heat from entering from the outside of the burnup layer 44 to the inside (the beam core material 18). In FIG. 4, if the burning allowance layer 44 has a thickness that can provide a sufficient burning stop effect due to carbonization, the burning allowance layer 44 may be used as the burning stop portion without providing the pipe member 16.

  In the first embodiment, an example in which a filler 34 such as a mortar or a fire-resistant material is filled between the outer surface of the pipe member 16 and the inner surface of the through hole 36 is shown. As long as the gap between the outer surface of the tube member 16 and the inner surface of the through hole 36 is closed, the flame or heat can be prevented from entering between the outer surface of the tube member 16 and the inner surface of the through hole 36. . The filler 34 is preferably a flame retardant material. Further, the outer surface of the pipe member 16 may be provided in close contact with the inner surface of the through hole 36. For example, the pipe member 16 may be fitted into the through hole 36 formed in the beam core material 18.

  In the first embodiment, as shown in FIG. 3A, the pipe member 16 is provided around the through hole 14 by inserting the pipe member 16 into the through hole 36 formed in the beam core material 18. However, the pipe member 46 may be formed around the through-hole 14 by the assembly procedure of the beam 48 shown in the front cross-sectional views of FIGS. As shown in FIG. 5A, first, the beam 48 is assembled by inserting a columnar formwork member 50 longer than the through hole 36 into the through hole 36 formed in the beam core 18. Then, the left and right end portions of the mold member 50 are protruded from the left and right side surfaces of the beam core member 18, and a gap having the same size as the thickness required for the pipe member 46 is formed between the outer surface of the mold member 50 and the through hole 36. The mold member 50 is disposed in the through hole 36 so as to be formed between the inner surface and the inner surface.

  Next, as shown in FIG. 5 (b), a mortar is placed in a gap formed between the outer surface of the mold member 50 and the inner surface of the through hole 36 and cured to form a tube member 46. . Next, as shown in FIG. 5C, after the mold member 50 is removed from the mold, the members constituting the flame stop layer 20 are bonded to the beam core 18 with an adhesive or the like. And the flame stop layer 20 is formed. At this time, the end face 52 of the pipe member 46 is burned and covered with the layer 20 without closing the opening 54 of the pipe member 16. Next, as shown in FIG. 5 (d), the members constituting the burn-off layer 22 are bonded to the burn-off layer 20 with an adhesive or the like, and the burn-off allowance is provided so as to surround the side surface and the lower surface of the burn-off layer 20. Layer 22 is formed.

  Next, a second embodiment of the present invention will be described. In the description of the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals and are appropriately omitted. As shown in FIG. 6A, which is a front sectional view of FIG. 6, FIG. 7A which is a CC arrow view of FIG. 6, and FIG. 7B which is a DD sectional view of FIG. Around the through hole 14 formed in 56, a wool-like member 58 made of rock wool is provided as a burn-in stop. The wool-like member 58 is packed and disposed between the outer surface of the steel pipe 60 disposed in the through hole 36 and the inner surface of the through hole 36. That is, the wool-like member 58 is held around the through hole 14 (inner surface of the through hole 36) by a steel pipe 60 as a tubular holding member. The wool-like member 58 and the steel pipe 60 are disposed inside the beam main body 12 (inside the flame stop layer 20).

  The beam 56 is assembled by, for example, the procedure shown in the front cross-sectional views of FIGS. First, as shown in FIG. 8A, a steel pipe 60 having a length substantially equal to the through hole 36 is inserted into the through hole 36 formed in the beam core material 18. And the steel pipe 60 is arrange | positioned in the through-hole 36 so that the right-and-left end part of the steel pipe 60 may not protrude from the left and right side surfaces of the beam core material 18.

  Next, as shown in FIG. 8 (b), a wool-like member 58 is packed between the inner surface of the through hole 36 and the outer surface of the steel pipe 60 to form a flame stop portion. Next, as shown in FIG. 8C, the members constituting the flame stop layer 20 are bonded to the beam core 18 with an adhesive or the like, and the flame stop layer 20 is surrounded so as to surround the side surface and the lower surface of the beam core 18. Form. At this time, the end face 64 of the steel pipe 60 is burned and covered with the layer 20 without closing the opening 62 of the steel pipe 60. Next, as shown in FIG. 8D, the members constituting the burn-off layer 22 are adhered to the burn-off layer 20 with an adhesive or the like, and the burn-off allowance is provided so as to surround the side surface and the lower surface of the burn-off layer 20. Layer 22 is formed.

  Next, the operation and effect of the second embodiment will be described. As shown in FIG. 6, in the beam 56, in the event of a fire, the flame and heat that have entered the through-hole 14 and the heat entering the beam core 18 are suppressed by the wool-like member 58 serving as a flame stop, and the wool-like member 58. Therefore, it is possible to reduce a decrease in fire resistance due to the formation of the through hole 14 in the beam main body 12.

  Further, since the wool-like member 58 expands and contracts as a lump, even when the shape of the beam main body 12 changes due to drying shrinkage in the event of a fire and a gap is formed inside the through-hole 36, the wool-like member 58 The lump of the member 58 can expand toward the outside (the beam core 18 side) to close this gap. Further, by providing the steel pipe 60, it is possible to prevent the flame or heat that has entered the through-hole 14 from directly hitting the burning stop portion (wool-like member 58), and to improve the burning stop effect at the burning stop portion.

  The second embodiment has been described above. In the second embodiment, an example in which the wool-like member 58 is rock wool has been described. However, the wool-like member 58 may be any material that can exhibit a burning-in effect for a predetermined time, and is a flame-retardant material. Is preferred. For example, the wool-like member 58 may be glass wool or ceramic wool.

  In the second embodiment, the steel pipe 60 is used as the holding member. However, the holding member holds the wool-like member 58 for a predetermined time when flame or heat enters the through hole 14. Any material that can be continued is preferable, and a flame-retardant material is preferable. The wool-like member 58 may be held around the through-hole 14 by another holding method, or the holding member may be omitted as long as the wool-like member 58 can be held around the through-hole 14 simply by packing. Moreover, you may use together facility piping etc. which are penetrated in the through-holes 14, such as a duct and a water pipe, as a holding member.

  Next, a third embodiment of the present invention will be described. In the description of the third embodiment, components having the same configurations as those of the first embodiment are denoted by the same reference numerals, and are appropriately omitted. As shown in FIG. 9 (a), which is a front sectional view of FIG. 9, as viewed from the direction of arrows EE in FIG. 9, and FIG. 10 (b), which is a sectional view taken along line FF in FIG. Around the through-hole 14 formed in 66, a tubular thermally foamable member 68 made of a foamable vinyl chloride pipe is provided as a flame stop. The thermally foamable member 68 is disposed inside the beam body 12 (inside the flame stop layer 20). Between the outer surface of the thermally foamable member 68 and the inner surface of the through hole 36, a filler 34 such as a mortar or a fire-resistant material is filled.

  Next, the operation and effect of the third embodiment will be described. As shown in the front sectional view of FIG. 11 (a), when a fire occurs in the state where the equipment pipe 70 is disposed in the through hole 14, as shown in the front sectional view of FIG. Is added, the thermally foamable member 68 foams and expands toward the equipment pipe 70 (arrow 72). Thereby, the heat-foamable member 68 is improved in heat insulation by increasing the volume. Therefore, in the event of a fire, the flame that has entered the through-hole 14 and the entry of heat into the beam core 18 are suppressed by the thermally foamable member 68 serving as a flame stop, and the flame main body 68 stops burning. 12 can reduce a reduction in fire resistance due to the formation of the through-holes 14.

  Even when the shape of the beam main body 12 changes due to drying shrinkage in the event of a fire and a gap is formed inside the through hole 36, the thermally foamable member 68 is outside (the inside surface of the through hole 36). ) To close this gap.

  The third embodiment has been described above. In the third embodiment, an example is shown in which the foamable vinyl chloride pipe is used as the thermally foamable member 68. However, the volume increases when heat is applied, and the flameproof effect is exhibited for a predetermined time. If it is. It is preferable to form with a flame-retardant material. Further, even if a tubular thermally expandable member is provided around the through-hole 14, it is possible to obtain a burn-in effect as in the case of the thermally foamable member 68.

  In the third embodiment, an example in which a filler 34 such as a mortar or a fire-resistant material is filled between the outer surface of the thermally foamable member 68 and the inner surface of the through hole 36 is shown. The material 34 closes a gap between the outer surface of the heat-foamable member 68 and the inner surface of the through hole 36, and flame, heat, and the like from between the outer surface of the heat-foamable member 68 and the inner surface of the through-hole 36. And any one that prevents entry of oxygen. It is preferable to form with a flame-retardant material. Since the thermally foamable member 68 is foamed, any of flame, heat, and oxygen from between the outer surface of the thermally foamable member 68 and the inner surface of the through-hole 36 can be provided even in the event of a fire without providing the filler 34. However, if the filler 34 is provided, it is possible to prevent heat from entering between the outer surface of the thermally foamable member 68 and the inner surface of the through hole 36 in a normal time when no fire has occurred. Can be prevented.

  Next, a fourth embodiment of the present invention will be described. In the description of the fourth embodiment, the same components as those in the first embodiment are denoted by the same reference numerals and are appropriately omitted. As shown in the front sectional view of FIG. 12A, in the beam 76, the thickness of the part of the flame stop layer 20 located around the through hole 14 is made thicker than that of the other part of the flame stop layer 20. Yes. That is, the flame stop layer 20 around the through hole 14 has a layer thickness. FIG. 12A shows an example in which the thickness of the flame stop layer 20 in the portion located around the through hole 14 is increased inward by the mortar member 74.

  Next, the operation and effect of the fourth embodiment will be described. As shown in the front cross-sectional view of FIG. 12A, in the beam 76, the heat that enters the through-hole 14 is absorbed by the entrance portion of the through-hole 14 by the heat-absorbing flame stop layer 20. The heat that enters the through hole 14 can be reduced. Further, by increasing the thickness of the flame stop layer 20 around the through hole 14, the heat to enter the through hole 14 can be effectively absorbed at the inlet portion of the through hole 14. This is particularly effective when the diameter of the through hole 14 is large.

  The fourth embodiment has been described above. In the fourth embodiment, the example in which the thickness of the flame stop layer 20 in the portion located around the through hole 14 is increased inward by the mortar member 74 is shown. It is only necessary that the thickness of the non-stop layer 20 in the portion located in the region is thicker than the non-stop layer 20 in the other portion. For example, as shown in the front cross-sectional view of FIG. 12B, the thickness of the flame stop layer 20 in the portion located around the through hole 14 may be increased outward by the amount of the mortar member 74. As shown in the front sectional view of FIG. 12 (c), the thickness of the flame stop layer 20 in the portion located around the through hole 14 is increased outward by the amount of the mortar member 74, and the outer surface of the mortar member 74 is The left and right side surfaces 26 and 24 of the burning allowance layer 22 may be flush with each other.

  Further, in the fourth embodiment, an example in which the thickness of the flame stop layer 20 located around the through hole 14 constituting the beam 10 shown in the first embodiment is increased is shown. The form can be applied to the second and third embodiments. That is, the thickness of the dead end layer 20 located around the through hole 14 constituting the beams 42, 56, 66 may be increased.

  The first to fourth embodiments have been described above. In the first to fourth embodiments, an example in which the beam main body 12 as a wooden member is a member having a three-layer structure constituted by the beam core material 18, the flame stop layer 20, and the burn allowance layer 22 is shown. However, the beam main body only needs to have the beam core material 18 and the burning allowance layer 22. For example, as a beam 78 shown in the front sectional view of FIG. 13, as a member having a two-layer structure in which a beam main body 80 is configured by the beam core material 18 and the burning allowance layer 22 surrounding the side surface and the lower surface of the beam core material 18. Also good.

  In the beam 78, when a fire occurs, the flame ignites the burning allowance layer 22 and the burning allowance layer 22 burns. The burned combustion allowance layer 22 is carbonized. As a result, the burning margin layer that carbonizes heat transfer and oxygen supply from the outside to the inside (beam core 18) of the burning margin layer 22 is cut off, and the beam core 18 at the time of fire (heating) and after the end of the fire (heating). Thus, the beam core material 18 can be stopped without burning. In addition, if the thickness (for example, about 40 mm) of the burning allowance layer 22 which can exhibit a burning stop effect can be ensured, the beam core material 18 and the burning allowance layer 22 may be formed by different materials, or formed by the same material. May be. That is, the beam body 80 may be made of a single piece of wood, and the surface layer of the beam body 80 may be used as the burning allowance layer 22.

  Further, in the first to fourth embodiments, an example in which the flame-stopping portion (the pipe member 16, the wool-like member 58, the heat-foamable member 68) is disposed inside the beam body 12 (inside the flame-stopping layer 20). However, like the beam 82 shown in the front cross-sectional view of FIG. 14, the flame stop portion may be arranged so as to penetrate the beam main body 12 as a wooden member. In FIG. 14, a steel pipe 60 is provided on the entire periphery of the through hole 14. The wool-like member 58 is packed between the inner surface of the through-hole 84 (intermediate portion is constituted by the through-hole 36) formed so as to penetrate the beam main body 12 and the outer surface of the steel pipe 60 to stop burning. Forming part. In this way, even when the through-hole 14 is formed after the construction of the beam 82 is completed, it is possible to provide a flame stop (wool-like member 58).

  The beam 82 is assembled, for example, according to the procedure shown in the front cross-sectional views of FIGS. First, as shown in FIG. 15A, a steel pipe 60 having a length substantially equal to the through hole 84 is inserted into the through hole 84. And the steel pipe 60 is arrange | positioned in the through-hole 36 so that the left-right edge part of the steel pipe 60 may not protrude from the left-right side surface of the beam main body 12. FIG. Next, as shown in FIG. 15 (b), a wool-like member 58 is packed between the inner surface of the through hole 84 and the outer surface of the steel pipe 60 to form a flame stop portion. In the assembly procedure shown in FIG. 15, the burn-out stop layer 20 and the burn-in allowance layer 22 may be attached after the steel pipe 60 is disposed in the through hole 36.

  In the first to fourth embodiments, the structural members are beams (beams 10, 42, 56, 66, and 76). However, the structure of these structural members includes beams, walls, beams, and the like. It can be applied to all structural members other than walls. The side sectional view of FIG. 16 shows an example in which the configuration of the beam 10 shown in the first embodiment is applied to the wall 86 as a structural member. Moreover, the through-hole 14 formed in the structural member (beams 10, 42, 56, 66, 76) shown in the first to fourth embodiments can be used for various applications. For example, facility piping, facility wiring, air conditioning ducts, and the like can be disposed through the through hole 14.

  In the first to fourth embodiments, the example in which the wooden member is the beam main body 12 has been described. However, the wooden member only needs to have the wooden beam core 18. For example, like the beams 10, 42, 56, 66, and 76 shown in the first to fourth embodiments, the wooden member is formed of a member (plate member 30) made of general wood and mortar. It is good also as a beam main body which has the flame stop layer comprised by the member (plate member 32), and a wooden beam core material, and it is good also as wooden beams like the beams 88 and 90 shown to front sectional drawing of FIG. The shape member 92 may be disposed inside the core material 18.

  In the beam 88 shown in FIG. 17, the through hole 14 penetrates the beam core 18, the web 98 of the shaped steel 92, and the beam core 18 in this order from the right side surface 94 to the left side surface 96 of the beam 88. Further, in the beam 90 shown in FIG. 18, the flame retardant layer 100 is formed on the side surface and the lower surface of the beam core 18, and the through hole 14 extends from the right side surface 94 to the left side surface 96 of the beam 90. The beam core 18, the web 98 of the shape steel 92, the beam core 18, and the flame retardant layer 100 are penetrated in this order.

  In the first to fourth embodiments, the example in which the through-hole 14 having a hole diameter of about 50 to 100 mm is formed in the beams 10, 42, 56, 66, and 76 is shown. For example, fire resistance can be exhibited even for the through-hole 14 having a diameter of about 1/3 of the beam. In addition, when there exists a concern about the strength fall around the through-hole 14 by forming the through-hole 14, structural reinforcement is given to the through-hole 14 by various methods suitably. For example, a reinforcing method as shown in the front sectional views of FIGS. 19 and 20 may be used, or through holes communicating with the through holes 14 are formed on both side surfaces of the beams 10, 42, 56, 66 and 76. A reinforcing plate such as a steel plate may be fixed.

  In FIG. 19, a reinforcing steel pipe 102 is fitted and fixed to the through hole 14, and the beam main body 12 is vertically moved by a bolt 104 provided around the through hole 14 and vertically penetrating the beam main body 12. Tightened. In FIG. 20, a pair of reinforcing bars 106 and 108 that are inserted obliquely into the beam body 12 and arranged in parallel are provided so as to sandwich the through hole 14.

  In the first to fourth embodiments, the flame stop layer 20 is disposed so as to surround the side surface and the lower surface of the beam core material 18, and the burn allowance layer 22 surrounds the side surface and the lower surface of the flame stop layer 20. However, the burn-out stop layer 20 may be disposed so as to surround the outer periphery of the beam core member 18, and the burn-off layer 22 is disposed so as to surround the outer periphery of the beam core member 18. You may arrange | position so that the outer periphery of the made flame stop layer 20 may be surrounded.

  In the first to fourth embodiments, an example in which a flame stop portion (tube member 16, wool-like member 58, thermally foamable member 68) is provided around the through-hole 14 is described. The term “around” refers to a case where the inner surface of the through-hole 14 is formed as in the pipe member 16 in FIG. 1 and the thermally foamable member 68 in FIG. 9, and the pipe member 16 in FIG. And the case where it is provided in the periphery away from the inner surface of the through-hole 14 like the wool-like member 58 of FIG.

  Moreover, you may make it provide the flame stop part (The pipe member 16, the wool-like member 58, the heat-foamable member 68) shown in 1st-4th embodiment in piles. In this case, a plurality of the same kind of dead ends may be provided in a stacked manner, or a plurality of different kinds of dead ends may be provided in a stacked manner. For example, the first flame stop portion is disposed so as to penetrate the beam main body 12, and the second flame outside is disposed outside the outer surface of the first flame stop portion and inside the beam main body 12 (inside the flame stop layer 20). You may arrange a fire stop part.

  The first to fourth embodiments have been described above, but the present invention is not limited to these embodiments, and the first to fourth embodiments may be used in combination. Needless to say, the present invention can be implemented in various forms without departing from the scope of the invention.

10, 42, 48, 56, 66, 76, 78, 82, 88, 90 Beam (structural member)
12, 80 Beam body (wooden member)
14 Through-hole 16, 46 Pipe member (flame stop)
18 Beam core (load support)
20 Burning stop layer 22 Burning allowance layer 58 Wool-like member (burning stop part)
68 Thermally foamable material (flame stop)
86 Wall (Structural member)

Claims (3)

A wooden member which load-bearing part of the wood is provided,
A through-hole penetrating the load support portion;
A flame stop provided around the through-hole and on the load support so as to form a hole wall of the through-hole or between the hole wall of the through-hole and the load support. ,
I have a,
In the wooden member,
A flame stop layer provided around the load support portion so as to cover a side surface and a lower surface of the load support portion, and a wood provided around the flame stop layer so as to cover a side surface and a lower surface of the flame stop layer. Burning layer,
A flame stop layer provided around the load support portion so as to cover the entire outer peripheral surface of the load support portion, and a wood provided around the flame stop layer so as to cover the entire outer peripheral surface of the flame stop layer. Burning layer,
A flame stop layer provided around the load support portion so as to cover a side surface of the load support portion, and a wooden burn allowance layer provided around the flame stop layer so as to cover a side surface of the flame stop layer,
A flame stop layer provided around the load support so as to cover a side surface and a lower surface of the load support;
And a flame stop layer provided around the load support portion so as to cover the entire outer peripheral surface of the load support portion . The flame stop layer has heat absorbability, the through hole penetrates, and a thickness of a part of the flame stop layer located at a hole edge of the through hole is thicker than a thickness of the other part of the flame stop layer. The structural member according to claim 1. A wooden member provided with a wooden load support;
A through-hole penetrating the load support portion;
A flame stop provided around the through-hole and on the load support so as to form a hole wall of the through-hole or between the hole wall of the through-hole and the load support. ,
Have
In the wooden member,
A wood burning allowance layer provided around the load support portion so as to cover a side surface and a lower surface of the load support portion;
And a wooden burning allowance layer provided around the load support portion so as to cover the entire outer peripheral surface of the load support portion,
A structural member in which no adhesive is provided between the flame stop portion and the load support portion.

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