JP2020105694A - Floor clt construction method and floor clt structure - Google Patents
Floor clt construction method and floor clt structure Download PDFInfo
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Abstract
Description
本発明は、床CLT工法および床CLT構造に関する。 The present invention relates to a floor CLT method and a floor CLT structure.
近年、構造用の新しい建築材料として、CLT(Cross Laminated Timber)の利用が提案されている。CLTとは、複数のラミナ層をそれらの繊維方向が互いに直交するように積層して接着したパネルである。 In recent years, the use of CLT (Cross Laminated Timer) has been proposed as a new building material for structures. The CLT is a panel in which a plurality of lamina layers are laminated and bonded so that their fiber directions are orthogonal to each other.
CLTには以下のような利点がある。すなわち、繊維方向が直交するように積層されていることから、大判で高い構造耐力を有するパネルを作ることが可能であり、中規模以上の集合住宅やオフィス・商業施設などにも活用することができる。また、パネル自体を壁や床として使用できるため、施工が簡易であり、大幅な工期短縮が可能であるとともに、型枠工等の専門技術を有する職人が不要となり、型枠工不足による建築費高騰の対策にも有効である。 CLT has the following advantages. In other words, since the fibers are laminated so that the fiber directions are orthogonal to each other, it is possible to make a large-sized panel with high structural strength, and it can also be used for medium-sized or larger apartments, offices and commercial facilities it can. In addition, since the panel itself can be used as a wall or floor, the construction is simple and the construction period can be greatly shortened, as well as craftsmen with specialized skills are not required, and the construction cost due to lack of formwork It is also effective as a measure against rising prices.
特許文献1には、防耐火性能を高めるために、CLTの表面ラミナ層と裏面ラミナ層との間の少なくとも1層全体を軽量気泡コンクリートパネルで置き換えた部材が記載されている。 Patent Document 1 describes a member in which at least one entire layer between the front lamina layer and the back lamina layer of the CLT is replaced with a lightweight cellular concrete panel in order to enhance fireproof performance.
CLT建築において、工事単価の縮小が望まれている。特に従来の床CLT工法では、鉄骨梁とCLTとの接合部にかかるコストの削減が課題となっている。 It is desired to reduce the construction unit price in CLT construction. Particularly, in the conventional floor CLT construction method, reduction of the cost required for the joint portion between the steel frame beam and the CLT is an issue.
本発明は、以上のような点を考慮してなされたものである。本発明の目的は、コストの点で改善された床CLT工法および床CLT構造を提供することにある。 The present invention has been made in consideration of the above points. An object of the present invention is to provide a floor CLT method and floor CLT structure that are improved in terms of cost.
本発明の第1の態様に係る床CLT工法は、
鉄骨梁の上に縁が載るように直交集成板を敷設するステップと、
前記直交集成板の縁に形成される欠込みに鉄筋を通すことなく、前記直交集成板の上面および端面を覆うように前記直交集成板の上にコンクリートを打設し、硬化したコンクリートによって前記直交集成板を前記鉄骨梁に固定するステップと、
を備える。
The floor CLT method according to the first aspect of the present invention is
Laying the orthogonal laminated plate so that the edge rests on the steel beam,
Without passing through the rebar in the notch formed in the edge of the orthogonal laminated plate, concrete is placed on the orthogonal laminated plate so as to cover the upper surface and the end surface of the orthogonal laminated plate, and the orthogonal shape is formed by the hardened concrete. Fixing the laminated plate to the steel beam,
Equipped with.
このような態様によれば、直交集成板の縁に形成されうる欠込みに鉄筋を通すことなく、直交集成板の上にコンクリートを打設して硬化させ、硬化したコンクリートによって直交集成板を鉄骨梁に固定するため、直交集成板の縁部分を加工する手間と作業員とが不要であり、これにより、鉄骨梁と直交集成板との接合部にかかるコストを著しく低減することができる。 According to this aspect, the concrete is placed on the orthogonal laminated plate to be cured without passing the reinforcing bar through the notch that may be formed at the edge of the orthogonal laminated plate, and the orthogonal laminated plate is made of the hardened concrete. Since it is fixed to the beam, it does not require labor and an operator to process the edge portion of the orthogonal laminated plate, whereby the cost required for the joint portion between the steel beam and the orthogonal laminated plate can be significantly reduced.
本発明の第2の態様に係る床CLT工法は、第1の態様に係る床CLT工法であって、
前記直交集成板を敷設するステップでは、前記鉄骨梁の上に立設されたガイド片に前記直交集成板の縁を当接させて位置決めする。
The floor CLT method according to the second aspect of the present invention is the floor CLT method according to the first aspect,
In the step of laying the orthogonal laminated plate, the edge of the orthogonal laminated plate is brought into contact with the guide piece erected on the steel beam to position it.
このような態様によれば、鉄骨梁の上に直交集成板を敷設する際に、直交集成板の位置決めに要する手間を省くことができる。 According to this aspect, when laying the orthogonal assembly plate on the steel beam, it is possible to save the labor required for positioning the orthogonal assembly plate.
本発明の第3の態様に係る床CLT構造は、
鉄骨梁と、
前記鉄骨梁に上に縁が載るように敷設された直交集成板と、
前記直交集成板の上面および端面を覆うように前記直交集成板の上に打設されて硬化され、前記直交集成板を前記鉄骨梁に固定するコンクリートと、
を備え、
前記直交集成板の縁には鉄筋が通される欠込みが形成されていない。
The floor CLT structure according to the third aspect of the present invention is
Steel beams,
An orthogonal assembly plate laid so that the edge is placed on the steel beam,
Concrete which is cast and cured on the orthogonal laminated plate so as to cover the upper surface and the end face of the orthogonal laminated plate, and which fixes the orthogonal laminated plate to the steel beam,
Equipped with
The edge of the orthogonal laminated plate is not formed with a notch through which a reinforcing bar is passed.
本発明の第4の態様に係る床CLT構造は、第3の態様に係る床CLT構造であって、
前記直交集成板の縁は、前記鉄骨梁の上に立設されたガイド片に当接されて位置決めされている。
A floor CLT structure according to a fourth aspect of the present invention is a floor CLT structure according to the third aspect,
An edge of the orthogonal assembly plate is brought into contact with and positioned by a guide piece that is erected on the steel beam.
本発明によれば、コストの点で改善された床CLT工法および床CLT構造を提供することができる。 According to the present invention, it is possible to provide a floor CLT method and a floor CLT structure which are improved in cost.
以下に、添付の図面を参照して、本発明の実施の形態を詳細に説明する。なお、各図において同等の機能を有する構成要素には同一の符号を付し、同一符号の構成要素の詳しい説明は繰り返さない。また、各図においては、図示の理解のしやすさの便宜上、適宜縮尺および縦横の寸法比等を、実物のそれらから変更し誇張してある。 Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In each figure, components having equivalent functions are designated by the same reference numerals, and detailed description of the components having the same reference symbols will not be repeated. Further, in each drawing, for convenience of easy understanding of the drawing, the scale, the vertical-horizontal dimensional ratio, and the like are appropriately changed and exaggerated.
<床CLT構造>
図2は、一実施の形態に係る床CLT構造30の概略構成を示す図である。
<Floor CLT structure>
FIG. 2 is a diagram showing a schematic configuration of the floor CLT structure 30 according to the embodiment.
図2に示すように、本実施の形態に係る床CLT構造30は、鉄骨梁31と、直交集成板10a、10bと、コンクリート33とを備えている。符号39は頭付きスタッドを示している。 As shown in FIG. 2, the floor CLT structure 30 according to the present embodiment includes a steel frame beam 31, orthogonal laminated plates 10 a and 10 b, and concrete 33. Reference numeral 39 indicates a headed stud.
このうち直交集成板10a、10bは、鉄骨梁31に上に縁が載るように敷設されている。図示された例では、直交集成板10a、10bは、5層5プライの構成であるが、これに限定されるものではなく、たとえば5層7プライ、3層3プライ、3層4プライ、7層7プライ、9層9プライのうちのいずれかの構成であってもよい。 Of these, the orthogonal assembly plates 10a and 10b are laid on the steel beam 31 so that the edges thereof are placed thereon. In the illustrated example, the orthogonal assembly plates 10a and 10b have a structure of five layers and five plies, but the present invention is not limited to this. For example, five layers and seven plies, three layers and three plies, three layers and four plies, and seven plies. Either one of the layer 7 ply and the layer 9 ply may be used.
本実施の形態では、図1に示すように、直交集成板10a、10bの縁には鉄筋32が通される欠込みが形成されておらず、鉄筋32は、直交集成板10a、10bの上方にて、直交集成板10a、10bの上面と平行に延びるように配設されている。 In the present embodiment, as shown in FIG. 1, the edges of the orthogonal assembly plates 10a and 10b are not formed with the notches through which the reinforcing bars 32 pass, and the reinforcing bars 32 are located above the orthogonal assembly plates 10a and 10b. Is arranged so as to extend parallel to the upper surfaces of the orthogonal assembly plates 10a and 10b.
コンクリート33は、直交集成板10a、10bの上面および鉄骨梁31の上に位置する端面をそれぞれ覆うように、直交集成板10a、10bの上に打設されて硬化されている。直交集成板10a、10bと鉄骨梁31とは硬化されたコンクリート33によって固定されている。 The concrete 33 is cast and hardened on the orthogonal laminated plates 10a, 10b so as to cover the upper surfaces of the orthogonal laminated plates 10a, 10b and the end faces located on the steel beam 31, respectively. The orthogonal assembly plates 10a and 10b and the steel beam 31 are fixed by hardened concrete 33.
<床CLT工法>
次に、上述した床CLT構造30を構築するための床CLT工法について、図1および図2を参照して説明する。
<Floor CLT method>
Next, the floor CLT construction method for constructing the floor CLT structure 30 described above will be described with reference to FIGS. 1 and 2.
まず、図1に示すように、建物の鉄骨造において、鉄骨梁31の上に縁が載るように直交集成板10a、10bを敷設する。 First, as shown in FIG. 1, in the steel structure of a building, the orthogonal assembly plates 10a and 10b are laid so that the edges are placed on the steel beam 31.
次に、図2に示すように、直交集成板10a、10bの縁に形成されうる欠込みに鉄筋32を通すことなく、直交集成板10a、10bの上面と平行に延びるように鉄筋32を配設したのち、直交集成板10a、10bの上面および端面を覆うように直交集成板10a、10bの上にコンクリート33を打設して硬化させる。そして、硬化したコンクリート33によって直交集成板10a、10bを鉄骨梁31に固定する。 Next, as shown in FIG. 2, the reinforcing bars 32 are arranged so as to extend parallel to the upper surfaces of the orthogonal laminated plates 10a, 10b without passing the reinforcing bars 32 through the notches that may be formed at the edges of the orthogonal laminated plates 10a, 10b. After the installation, concrete 33 is cast on the orthogonal laminated plates 10a, 10b so as to cover the upper surfaces and end faces of the orthogonal laminated plates 10a, 10b, and hardened. Then, the orthogonal laminated plates 10a and 10b are fixed to the steel beam 31 by the hardened concrete 33.
ところで、発明が解決しようとする課題で言及したように、従来の床CLT工法では、鉄骨梁とCLTとの接合部にかかるコストの削減が課題となっていた。 By the way, as mentioned in the problem to be solved by the invention, in the conventional floor CLT method, there has been a problem to reduce the cost for the joint portion between the steel beam and the CLT.
図5および図6は、第1比較例に係る床CLT工法であって、従来の床CLT工法を説明するための図である。 FIG. 5 and FIG. 6 are views for explaining a floor CLT construction method according to the first comparative example, which is a conventional floor CLT construction method.
第1比較例に係る床CLT工法では、まず、図5に示すように、鉄骨梁31の上に所定のピッチでスタッド35を溶接するとともに、直交集成板10a、10bのうち鉄骨梁31に載せられる縁部分に、スタッド35と同じピッチにて貫通孔18を穴あけ加工しておく。そして、直交集成板10a、10bの貫通孔18に鉄骨梁31のスタッド35を挿通するようにして、鉄骨梁31の上に直交集成板10a、10bを敷設する。 In the floor CLT method according to the first comparative example, first, as shown in FIG. 5, the studs 35 are welded onto the steel beam 31 at a predetermined pitch, and the studs 35 are placed on the steel beam 31 of the orthogonal assembly plates 10a and 10b. The through holes 18 are drilled at the same edge as the studs 35 at the same pitch. Then, the orthogonal assembly plates 10a, 10b are laid on the steel frame beam 31 so that the studs 35 of the steel frame beam 31 are inserted into the through holes 18 of the orthogonal assembly plates 10a, 10b.
次いで、図6に示すように、直交集成板10a、10bの貫通孔18に接着剤36(たとえばエポキシ樹脂)を充填して硬化させ、硬化した接着剤36によって直交集成板10a、10bを鉄骨梁31に固定する。 Next, as shown in FIG. 6, the through holes 18 of the orthogonal laminated plates 10a and 10b are filled with an adhesive 36 (for example, epoxy resin) and cured, and the orthogonal laminated plates 10a and 10b are fixed to the steel beam by the cured adhesive 36. Fix at 31.
このような第1比較例に係る床CLT工法では、直交集成板10a、10bを鉄骨梁31の上に敷設する前に、鉄骨梁31の上に所定のピッチでスタッド35を溶接するとともに、直交集成板10a、10bのうち鉄骨梁31に載せられる縁部分に、スタッド35と同じピッチにて貫通孔18を穴あけ加工しておく手間と作業員とが必要となるため、鉄骨梁31と直交集成板10a、10bとの接合部にかかる費用が大きかった。 In the floor CLT method according to the first comparative example, the studs 35 are welded on the steel beam 31 at a predetermined pitch before the orthogonal laminated plates 10a and 10b are laid on the steel beam 31, and Since it is necessary to have a labor and an operator to drill the through holes 18 at the same pitch as the studs 35 in the edge portion of the laminated plates 10a and 10b to be mounted on the steel beam 31, an orthogonal assembly with the steel beam 31 is required. The cost of joining the plates 10a and 10b was large.
図7A、図7Bおよび図8は、第2比較例に係る床CLT構造であって、本件発明者らの当初の考案に係る床CLT工法を説明するための図である。 FIG. 7A, FIG. 7B, and FIG. 8 are views for explaining a floor CLT structure according to the second comparative example, which is a floor CLT construction method originally proposed by the present inventors.
第2比較例に係る床CLT工法では、まず、図7Aおよび図7Bに示すように、直交集成板10a、10bの縁部分に、鉄筋32を通すための欠込み19を形成しておく。そして、欠込み19が施された縁部分が鉄骨梁31の上に載るようにして、直交集成板10a、10bを鉄骨梁31の上に敷設する。 In the floor CLT method according to the second comparative example, first, as shown in FIGS. 7A and 7B, notches 19 for passing the reinforcing bars 32 are formed in the edge portions of the orthogonal laminated plates 10a, 10b. Then, the orthogonal assembly plates 10 a and 10 b are laid on the steel beam 31 such that the edge portions having the notches 19 are placed on the steel beam 31.
次いで、図7Aおよび図7Bに示すように、直交集成板10a、10bの縁の欠込み19に鉄筋32を通すようにして、直交集成板10a、10bの上に鉄筋32を配設したのち、直交集成板10a、10bの上面および端面を覆うように直交集成板10a、10bの上にコンクリート33を打設して硬化させる。そして、硬化したコンクリート33によって直交集成板10a、10bを鉄骨梁31に固定する。 Next, as shown in FIGS. 7A and 7B, after the reinforcing bars 32 are arranged on the orthogonal laminated plates 10a and 10b by passing the reinforcing bars 32 through the notches 19 in the edges of the orthogonal laminated plates 10a and 10b, Concrete 33 is cast on the orthogonal laminated plates 10a, 10b so as to cover the upper surfaces and the end faces of the orthogonal laminated plates 10a, 10b and hardened. Then, the orthogonal laminated plates 10a and 10b are fixed to the steel beam 31 by the hardened concrete 33.
このような第2比較例に係る床CLT工法では、第1比較例に係る床CLT工法に比べて接合部に係るコストを低減できるものの、直交集成板10a、10bの縁部分に予め欠込み19を形成しておく必要があった。 In the floor CLT construction method according to the second comparative example as described above, although the cost related to the joint can be reduced as compared with the floor CLT construction method according to the first comparative example, the notch 19 is previously formed in the edge portion of the orthogonal laminated plates 10a, 10b. Had to be formed.
これらの比較例に対し、上述した実施の形態によれば、図2を参照し、直交集成板10a、10bの縁に形成されうる欠込みに鉄筋32を通すことなく、直交集成板10a、10b上にコンクリート33を打設して硬化させ、硬化したコンクリート33によって直交集成板10a、10bを鉄骨梁31に固定するため、直交集成板10a、10bの縁部分を加工する手間と作業員とが不要となる。これにより、鉄骨梁31と直交集成板10a、10bとの接合部にかかるコストを著しく低減することができる。 In contrast to these comparative examples, according to the above-described embodiment, referring to FIG. 2, the orthogonal reinforcing plates 10a, 10b are not passed through the notches that may be formed at the edges of the orthogonal bonding plates 10a, 10b. Since the concrete 33 is cast on the top and hardened, and the orthogonal laminated plates 10a and 10b are fixed to the steel beam 31 by the hardened concrete 33, the labor and the operator of processing the edge portions of the orthogonal laminated plates 10a and 10b are required. It becomes unnecessary. As a result, the cost of joining the steel beam 31 and the orthogonal assembly plates 10a and 10b can be significantly reduced.
なお、上述の実施の形態に対して様々な変更を加えることが可能である。以下、図面を参照しながら、変形の一例について説明する。以下の説明および以下の説明で用いる図面では、上述の実施の形態と同様に構成され得る部分について、上述の実施の形態における対応する部分に対して用いる符号と同一の符号を用いるとともに、重複する説明を省略する。 Various changes can be made to the above-described embodiment. Hereinafter, an example of the modification will be described with reference to the drawings. In the following description and the drawings used in the following description, the same reference numerals as those used for the corresponding portions in the above-described embodiment are used for the portions that may be configured in the same manner as in the above-described embodiment, and the same portions will be duplicated. The description is omitted.
<床CLT工法の一変形例>
図3A、図3Bおよび図4は、一実施の形態の一変形例に係る床CLT工法を説明するための図である。
<Variation of floor CLT method>
FIG. 3A, FIG. 3B and FIG. 4 are views for explaining a floor CLT method according to a modification of the embodiment.
一変形例に係る床CLT工法では、まず、図3Aおよび図3Bに示すように、鉄骨梁31の上にガイド片34を溶接しておく。そして、鉄骨梁31の上に立設されたガイド片34に直交集成板10a、10bの縁を当接させて位置決めした状態で、鉄骨梁31の上に直交集成板10a、10bを敷設する。 In the floor CLT method according to the modified example, first, as shown in FIGS. 3A and 3B, a guide piece 34 is welded on the steel beam 31. Then, the orthogonal assembly plates 10a, 10b are laid on the steel beam 31 in a state where the edges of the orthogonal assembly plates 10a, 10b are brought into contact with the guide pieces 34 erected on the steel beam 31 and positioned.
その後、上述した実施の形態と同様に、図4に示すように、直交集成板10a、10bの縁に形成されうる欠込みに鉄筋32を通すことなく、直交集成板10a、10bの上面と平行に延びるように鉄筋32を配設したのち、直交集成板10a、10bの上面および端面を覆うように直交集成板10a、10bの上にコンクリート33を打設して硬化させる。そして、硬化したコンクリート33によって直交集成板10a、10bを鉄骨梁31に固定する。 Then, as in the above-described embodiment, as shown in FIG. 4, the reinforcing bars 32 are not passed through the notches that may be formed at the edges of the orthogonal laminated plates 10a and 10b, and the upper faces of the orthogonal laminated plates 10a and 10b are parallel to each other. After arranging the reinforcing bars 32 so as to extend, concrete 33 is cast on the orthogonal laminated plates 10a, 10b so as to cover the upper surfaces and end faces of the orthogonal laminated plates 10a, 10b and hardened. Then, the orthogonal assembly plates 10 a and 10 b are fixed to the steel beam 31 by the hardened concrete 33.
このような態様によれば、直交集成板10a、10bを鉄骨梁31の上に敷設する前に、鉄骨梁31の上にガイド片34を溶接しておく必要があるものの、上述した実施の形態と同様に、直交集成板10a、10bの縁部分を加工する手間と作業員とが不要であるため、接合部にかかるコストを著しく低減することができる。また、このような態様によれば、鉄骨梁31の上に直交集成板10a、10bを敷設する際に、直交集成板10a、10bの位置決めに要する手間を省くことができる。 According to such an aspect, the guide piece 34 needs to be welded onto the steel beam 31 before the orthogonal assembly plates 10a and 10b are laid on the steel beam 31, but the above-described embodiment is used. Similarly, since it is not necessary to process the edge portions of the orthogonal laminated plates 10a and 10b and the operator, the cost for the joint can be significantly reduced. Further, according to such an aspect, when laying the orthogonal assembly plates 10a, 10b on the steel beam 31, it is possible to save the labor required for positioning the orthogonal assembly plates 10a, 10b.
なお、上述した実施の形態および個々の変形例の記載ならびに図面の開示は、特許請求の範囲に記載された発明を説明するための一例に過ぎず、上述した実施の形態および個々の変形例の記載または図面の開示によって特許請求の範囲に記載された発明が限定されることはない。上述した実施の形態および個々の変形例の構成要素は、発明の主旨を逸脱しない範囲で任意に組み合わせることが可能である。 The description of the above-described embodiments and individual modifications and the disclosure of the drawings are merely examples for explaining the invention described in the claims, and the above-described embodiments and individual modifications The description or the disclosure of the drawings does not limit the invention described in the claims. The constituent elements of the above-described embodiments and individual modifications can be arbitrarily combined without departing from the gist of the invention.
10a、10b 直交集成板
18 貫通孔
19 欠込み
30 床CLT構造
31 鉄骨梁
32 鉄筋
33 コンクリート
34 ガイド片
35 スタッド
36 接着剤
39 頭付きスタッド
10a, 10b Orthogonal assembly plate 18 Through hole 19 Notch 30 Floor CLT structure 31 Steel beam 32 Reinforcing bar 33 Concrete 34 Guide piece 35 Stud 36 Adhesive 39 Headed stud
Claims (4)
前記直交集成板の縁に形成される欠込みに鉄筋を通すことなく、前記直交集成板の上面および端面を覆うように前記直交集成板の上にコンクリートを打設し、硬化したコンクリートによって前記直交集成板を前記鉄骨梁に固定するステップと、
を備えたことを特徴とする床CLT工法。 Laying the orthogonal laminated plate so that the edge rests on the steel beam,
Without passing through the rebar in the notch formed in the edge of the orthogonal laminated plate, concrete is placed on the orthogonal laminated plate so as to cover the upper surface and the end surface of the orthogonal laminated plate, and the orthogonal shape is formed by the hardened concrete. Fixing the laminated plate to the steel beam,
The floor CLT method is characterized by being equipped with.
ことを特徴とする請求項1に記載の床CLT工法。 In the step of laying the orthogonal laminated plate, the edge of the orthogonal laminated plate is brought into contact with the guide piece erected on the steel beam to be positioned,
The floor CLT method according to claim 1, wherein the floor CLT method is used.
前記鉄骨梁に上に縁が載るように敷設された直交集成板と、
前記直交集成板の上面および端面を覆うように前記直交集成板の上に打設されて硬化され、前記直交集成板を前記鉄骨梁に固定するコンクリートと、
を備え、
前記直交集成板の縁には鉄筋が通される欠込みが形成されていない、
ことを特徴とする床CLT構造。 Steel beams,
An orthogonal assembly plate laid so that the edge is placed on the steel beam,
Concrete which is cast and cured on the orthogonal laminated plate so as to cover the upper surface and the end face of the orthogonal laminated plate, and which fixes the orthogonal laminated plate to the steel beam,
Equipped with
A notch through which a reinforcing bar is passed is not formed at the edge of the orthogonal laminated plate,
A floor CLT structure characterized in that
ことを特徴とする請求項3に記載の床CLT構造。 The edge of the orthogonal assembly plate is positioned by abutting on a guide piece erected on the steel beam.
The floor CLT structure according to claim 3, wherein:
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JPH08312044A (en) * | 1995-05-23 | 1996-11-26 | Nippon Iton Kogyo Kk | Panel attachment and attachment structure therefor |
JP2017078307A (en) * | 2015-10-21 | 2017-04-27 | 株式会社竹中工務店 | Load bearing plate member |
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JPH08312044A (en) * | 1995-05-23 | 1996-11-26 | Nippon Iton Kogyo Kk | Panel attachment and attachment structure therefor |
JP2017078307A (en) * | 2015-10-21 | 2017-04-27 | 株式会社竹中工務店 | Load bearing plate member |
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