KR101503809B1 - Spacer for truss girder fixing and deck plate combine structure for ceiling mold using there of - Google Patents

Spacer for truss girder fixing and deck plate combine structure for ceiling mold using there of Download PDF

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Publication number
KR101503809B1
KR101503809B1 KR20140168909A KR20140168909A KR101503809B1 KR 101503809 B1 KR101503809 B1 KR 101503809B1 KR 20140168909 A KR20140168909 A KR 20140168909A KR 20140168909 A KR20140168909 A KR 20140168909A KR 101503809 B1 KR101503809 B1 KR 101503809B1
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KR
South Korea
Prior art keywords
truss girder
spacer
seating
deck plate
reinforcing bars
Prior art date
Application number
KR20140168909A
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Korean (ko)
Inventor
구연진
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구연진
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Publication date
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Priority to KR20140168909A priority Critical patent/KR101503809B1/en
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Publication of KR101503809B1 publication Critical patent/KR101503809B1/en

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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/16Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/32Floor structures wholly cast in situ with or without form units or reinforcements
    • E04B5/36Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor
    • E04B5/38Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor with slab-shaped form units acting simultaneously as reinforcement; Form slabs with reinforcements extending laterally outside the element
    • E04B5/40Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor with slab-shaped form units acting simultaneously as reinforcement; Form slabs with reinforcements extending laterally outside the element with metal form-slabs
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/168Spacers connecting parts for reinforcements and spacing the reinforcements from the form
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR OTHER BUILDING AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G17/00Connecting or other auxiliary members for forms, falsework structures, or shutterings
    • E04G17/06Tying means; Spacers ; Devices for extracting or inserting wall ties

Abstract

The present invention is characterized in that a spacer 22 which is a medium for coupling the deck plate and the truss girder to each other is formed by forming a mount 22 in which a fastening hole 24 is formed downward on both sides of the lower portion of the main body 21, And a lower reinforcing bar 46 constituting a truss girder 40 is formed at a lower portion of the preliminary placing portion 30. The lower reinforcing bars 46 are formed on the upper portion of the upper placing portion 30, It is easy to assemble, the welding equipment is unnecessary, the electricity consumption is not economical, the force is applied, and the welding can be relatively easily combined.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a spacer for fixing a truss girder, and a coupling structure between a deck plate and a truss girder using the spacer,

More particularly, the present invention relates to a spacer for coupling a truss girder to an upper portion of a deck plate, and a coupling structure between a deck plate and a truss girder using the spacer.

Generally, a building is made up of various structures such as a column, a beam, a ceiling, and a stairway. In the case of a column of a building, a typical form is formed and a concrete is laid. For the beams and ceilings, formwork was formed and concrete was laid.

However, the conventional beam and ceiling forming method requires a lot of time to form the plywood with the plywood, the pillar, and the pedestal, and since the concrete is to be dismantled after the pouring and curing, there is a problem that the construction period is long.

In addition, the cured concrete requires a long period of curing time to have a supporting stress of more than a certain strength, and since the cantilever installed to support the load of the concrete can not be removed until the curing time, There are many inconveniences.

In order to solve this problem, there is a deck plate type which is installed between the beams, which is a structure for constructing a building, and which is placed on the concrete and the deck plate structure capable of supporting the weight of the concrete itself generated in the process of curing the concrete A mold or paperboard panel was proposed.

1, the spacer 20 is fixedly connected to the upper portion of the deck plate 10 at a predetermined interval by a fastener 50 such as a piece or the like, and a truss girder 40 ) Is a known technique.

The truss girder 40 is welded at regular intervals with lattices 44 bent in the form of " L " on both sides thereof with the upper reinforcing bar 42 as a center, And the lower reinforcing bars 46 are respectively welded and extended.

When the truss girder 40 is coupled to the upper portion of the spacer 20, the truss girder 40 is formed on the upper surface of the metal connecting bar 22 of the spacer 20 as shown in the enlarged view of FIG. The two lower reinforcing bars 46 are fixed by welding.

However, the welding method requires a dedicated welding jig and a mechanical device, and management of consumables is required accordingly. In addition, a considerable amount of electricity is consumed due to a small amount of electricity consumption, resulting in a long production time and a low production efficiency.

Korean Patent No. 10-1202377 entitled " Truss girder integral deck plate "

Accordingly, the present invention provides a spacer for fixing a truss girder which can be coupled in place of a welding method in coupling a truss girder to an upper portion of a spacer coupled to a deck plate, and a coupling structure between the deck plate and the truss girder.

In order to accomplish the above object, the present invention provides a spacer as a medium for coupling between a deck plate and a truss girder, wherein a mount (22) having a fastening hole (24) And a truss girder 40 is formed on both sides of the upper portion of the main body 21 and a truss girder 40 is formed below the truss section 30 to temporarily hold the truss girder 40 And the lower reinforcing bar 46 is inserted and fixed in the seating groove 26.

The present invention can be combined with a truss girder at the upper part of a spacer coupled to a deck plate in place of a welding method, so that assembly is easy, welding equipment is unnecessary, and electricity consumption is economical. And it is relatively easy to connect the spacer to the truss girder by simply pushing it downward, so that the assembly work can be performed anytime and anywhere without any place, and the productivity is improved.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a structure for coupling a truss girder to a spacer coupled on a conventional deck plate, Fig.
FIG. 2 is a view showing a state where a truss girder is coupled to a spacer according to an embodiment of the present invention;
3 is a schematic view of a spacer of the present invention,
4 is a detailed view illustrating a process of joining a truss girder to a spacer according to an embodiment of the present invention.
5 is a detailed view illustrating a process of coupling a truss girder to a spacer according to another embodiment of the present invention.
6 is a view showing a state where a truss girder is coupled to a spacer according to an embodiment of the present invention,
7 is a view showing a state in which an end portion of a neighboring deck plate is engaged with a lower portion of a mount of a spacer when a form is formed using a deck plate coupled with a truss girder through a spacer,
8 is a photograph showing a state in which a truss girder is coupled to a spacer according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the description of the present invention, a detailed description of a known structure for coupling a truss girder to an associated deck plate will be omitted, and a structure requiring understanding in connection with the present invention will be schematically illustrated.

Referring to FIGS. 2 to 5, the truss girder fixing spacer 20 (hereinafter, simply referred to as a spacer) according to the embodiment of the present invention is preferably made of a synthetic resin material such as PE or PP, And is fixed to an upper portion thereof through a fastener 50 such as a piece or a bolt and functions as an intermediate medium for fixing the truss girder 40 thereon.

The truss girder 40 is welded at regular intervals with lattices 44 bent in a "? &Quot; form on both sides of the upper reinforcing bar 42 as in the prior art, And the two lower reinforcing bars 46 are welded to each other and extended.

3, a spacer 20 according to the present invention constitutes a mount 22 in which a fastening hole 24 is formed downward on both sides of a lower portion of a main body 21, Thereby forming a preliminary seating portion 30 for lifting the girder 40 to temporarily hold it.

A seating groove 26 is formed in the lower portion of the preliminary seating part 30 so that the lower reinforcing bar 46 constituting the truss girder 40 is fitted and fixed.

In the present invention, the preliminary seating part 30 is formed to have the following features.

That is, if the truss girder 40 having a long shape is placed on the preliminary placing portion 30, the preliminary placing portion 30 is naturally temporarily aligned on the preliminary placing portion 30, When the reinforcing bar 42 is pressed downward by a force, the anti-tip prevention wall portion 32 is formed so as to be well balanced without any deviation in one direction.

At this time, the length d1 between the both side anti-scattering wall portions 32 is formed to be shorter than the length between the inner ends of the two lower reinforcing bars 46 constituting the truss girder 40. The reason for this is that even when the operator roughly raises the truss girder 40 to the preliminary seating portion 30, the worker is easily put on the preliminary seating portion 30. After the truss girder 40 is lifted up, Is prevented from being tilted to one side, so that it is naturally maintained as if it is centered.

Particularly, when the lower portion of the truss girder 40 is subjected to a downward force, since the joint can not proceed smoothly when it is tilted to one side, the anti-thrust wall portion 32 prevents this phenomenon and facilitates the coupling.

Next, the preliminary seating portion 30 constitutes the slip guide slope portion 34 extending to the anti-slip wall portion 32, and when the force is applied downward to the temporarily mounted truss girder 40, And the lower reinforcing bar 46 is guided to move downward while spreading to both sides. It is preferable that the slip induction slanting portion 34 is formed to be inclined in a curved shape.

At the end of the slip guide slope portion 32, a protruding extension portion 36 is formed. The protruding extension portion 36 extends to protrude outwardly from the mounting groove 26 and becomes an element constituting the open end 26a of the mounting groove 26. [

The upper and lower open ends 26a of the seating grooves 26 are preferably formed so as to protrude inward so that the lower reinforcing bars 46 seated in the seating grooves 26 are stably held.

The length d2 between the inner ends of the seating grooves 26 formed on both sides of the seating groove 26 is preferably longer than the length between the inner ends of the two lower reinforcing bars 46. [ The reason for this is that when both side lower reinforcing rods 46 of the truss girder 40 are fitted and seated in the both side seating grooves 26, they are tightly fixed without being loosened.

On the other hand, as an important construction in the present invention, the outer end of the mount 22 is formed so as to extend further outward than the outer end of the protruding extension 36 constituting the preliminary seating portion 30. [ 3, the outer end of the mount 22 is formed so as to extend further outward than the outer end of the protruding extension 36, so that a gap difference d3 between them is generated.

This is because the truss girder 40 is mounted on the preliminary seating portion 30 of the spacer 20 as shown in Fig. 4 (a), and then the upper reinforcing bar 42 of the truss girder 40 is subjected to a force The lower reinforcing bar 46 of the truss girder 40 is clogged by the upper surface 28 of the mount 22 after passing through the projecting extension 36 of the preliminary seating portion 30, So that it can be naturally inserted into the seating groove 26 after being placed on the upper surface 28.

If the outer end of the mount 22 is not formed so as to extend further outward than the outer end of the protruding extension 36 of the preliminary seating 30, The lower reinforcing bar 42 can not be smoothly seated in the seating groove 26. In this case,

4C is a diagram showing the process until the lower reinforcing bars 46 of the truss girder 40 are seated in the seating grooves 26 of the spacers 20. The lower reinforcing bars are arranged in the order of ① → ② → ③ → ④.
8 is a photograph showing a state in which the truss girder 40 is engaged with the spacer 20 according to the embodiment of the present invention. When applying a downward force to the truss girder 40, Assembly is done by pushing on foot. This can be quickly and easily combined simply by pressing on the upper reinforcing bars 42 of the truss girder 40 in succession around the spacer 20 by itself without adding the forces of several persons.

5 is a view showing a process of joining the truss girder 40 to the spacer 20a according to another embodiment and shows that the open portions of the side seating grooves 26 may be formed on the inside so as to face each other , And the coupling process is shown in accordance with FIG.

Referring to FIG. 6, after the truss girder 40 is coupled to the deck plate 10 through the spacer 20 of the present invention, a plurality of separate holding holes 60 can be connected. The holding hole 60 serves to lock the coupled truss girder 40 so as not to be separated from the truss girder 40. The holding hole 60 can be connected to both ends of the truss girder 40 and to the inner side of the truss girder 40 at a predetermined interval.

The holding holes 60 are formed in the lower portions of both sides so as to be fitted in the two lower reinforcing bars 46 constituting the truss girder 40 fitted in the seating grooves 26 of the spacer 20 .

Particularly, the holding hole 60a is formed with a coupling hole 62a which is inclined inward, and one of the two lower reinforcing bars 46 is formed by using the coupling hole 62a. And the force is applied to the other of the coupling holes 62 to engage with each other.

7 shows a state in which when the deck plate 10 having the truss girder 40 connected thereto is used to form the form via the spacer 20 of the present invention, (Not shown).

That is, the end of the deck plate 10 located at the upper one of the end portions of the upper and lower deck plates 10 is caught by the lower portion of the mount 22 of the spacer 20 coupled to the upper deck plate 10 It is possible to better support the weight due to the concrete pouring and to prevent the end portion of the day plate 10, which is vertically overlapped, from being stuck downward due to the load of the concrete.

As shown in the enlarged view of FIG. 7, if the end of the upper deck plate 10 is bent so as to be doubly overlapped, the effect becomes larger.

As described above, the truss girder fixing spacer 20 according to the embodiment of the present invention can be assembled instead of the welding method, so that it is easy to assemble, the welding equipment is unnecessary, the electricity consumption is not economical, It is relatively easy to combine to increase the productivity. It also has the advantage of being able to recycle synthetic resin such as PE or PP.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. Therefore, the scope of the present invention should not be limited by the described embodiments, but should be determined by the scope of claims and equivalents thereof.

The present invention can be used to form a ceiling mold.

(10) - Deck plate (20) - Spacer
(21) - body (22) - mount
(24) - fastening hole (26) - seat fastening groove
(28) - upper surface (30) - preliminary seat
(32) - an anti-tip wall portion (34) - a slip induction slope portion
(36) - projecting extension (40) - truss girder
(42) - Upper Reinforcement (44) - Lathis
(46) - lower reinforcing bar (50) - fastener
(60) (60a) - Holding holes (62) (62a) - Coupling hole

Claims (6)

  1. In constructing the spacer, which is a medium for coupling the deck plate and the truss girder to each other,
    A mount 22 is formed on both sides of a lower portion of the main body 21, the mount 22 having a downwardly extending fastening hole 24,
    The truss girder 40 is mounted on both sides of the upper portion of the main body 21 to constitute a preliminary seating part 30 for temporarily holding the lower part of the truss girder 40. A lower reinforcing bar 46 ) Is fitted and fixed to the mounting groove 26,
    When the truss girder 40 is lifted and temporarily held or a force is applied to the truss girder 40, the pre-seating portion 32 is held in a balanced manner without being tilted in either direction. And constitutes a slip guide slope part 34 which causes the lower reinforcing bars 46 of the truss girder 40 to move to both sides while being moved downward when a force is applied to the temporarily fixed truss girder 40, A protruding extension 36 is formed at the end of the slip induction slant part 32 so that the protruding extension part 36 is extended longer than the mounting recess 26,
    Wherein an outer end of the mount (22) is formed to extend further outward than an outer end of the preliminary seat (30).
  2. delete
  3. delete
  4. The method according to claim 1,
    The length d1 between the both side anti-skid wall portions 32 is formed to be shorter than the length between the inner ends of the two lower reinforcing bars 46 constituting the truss girder 40,
    The length d2 between the inner ends of the two side seating grooves 26 is longer than the length between the inner ends of the two lower reinforcing bars 46,
    The upper and lower open end portions (26a) of the seating groove (26) are formed to protrude inward so that the both side lower reinforcing rods (46) seated in the seating groove (26) are stably stably held. Spacer.
  5. In assembling the truss girder (40) on the deck plate (10)
    The spacer (20) described in claim 1 is fixedly coupled to the deck plate (10) by a plurality of spaced apart fasteners (50) in the longitudinal direction,
    The two lower reinforcing bars 46 constituting the truss girder 40 extending in the longitudinal direction are temporarily placed on the preliminary seating portion 30 of the spacer 20,
    The two lower reinforcing bars 46 are moved downward while being spread on both sides by applying a downward force to the truss girder 40 so as to be seated in the seating groove 26 of the spacer 20 and fixed thereto. Joint structure between truss girders.
  6. In assembling the truss girder (40) on the deck plate (10)
    The spacer (20) described in claim 1 is fixedly coupled to the deck plate (10) by a plurality of spaced apart fasteners (50) in the longitudinal direction,
    The two lower reinforcing bars 46 constituting the truss girder 40 extending in the longitudinal direction are temporarily placed on the preliminary seating portion 30 of the spacer 20,
    The two lower reinforcing bars 46 are moved downward while being spread to both sides by applying a downward force to the truss girder 40 so as to be seated in the seating grooves 26 of the spacers 20 to be engaged and fixed,
    And the holding holes (60) and (60a) are joined to the lower reinforcing bars (46) on both sides of the truss girder (40) fitted in the seating groove (26) of the spacer (20) .
KR20140168909A 2014-11-28 2014-11-28 Spacer for truss girder fixing and deck plate combine structure for ceiling mold using there of KR101503809B1 (en)

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Application Number Priority Date Filing Date Title
KR20140168909A KR101503809B1 (en) 2014-11-28 2014-11-28 Spacer for truss girder fixing and deck plate combine structure for ceiling mold using there of

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KR20140168909A KR101503809B1 (en) 2014-11-28 2014-11-28 Spacer for truss girder fixing and deck plate combine structure for ceiling mold using there of
PCT/KR2015/012386 WO2016085187A1 (en) 2014-11-28 2015-11-18 Spacer for holding truss girder and coupling structure between deck plate and truss girder using same

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KR101503809B1 true KR101503809B1 (en) 2015-03-18

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101590444B1 (en) 2015-04-13 2016-02-02 (주)윈하이텍 Combination structure between deck plate for ceiling mold
KR101606439B1 (en) * 2015-09-23 2016-03-25 구연진 Spacer for fixing between truss girder and deck plate combine
KR101639009B1 (en) * 2015-09-18 2016-07-12 구연진 In ceiling mold using truss girder type deck panels, flowing down pour concrete fluid-resistant filler and ceiling mold structure using there of
KR101656270B1 (en) * 2016-01-19 2016-09-09 구연진 Spacer for insulation combining at truss girder type deck panel and insulation combined truss girder type deck panel using there of
KR101660851B1 (en) * 2015-05-19 2016-09-28 (주)윈하이텍 Mold panel construction structure using that binding solidarity for between ceiling mold panel and construction method
CN106351377A (en) * 2016-09-27 2017-01-25 重庆镪镔实业股份有限公司 Steel bar truss floor deck for industrial buildings and civil buildings as well as mounting method of floor deck
KR101785723B1 (en) * 2016-10-25 2017-10-16 에스와이스틸텍 주식회사 Insulation Integrated Deck Plate
KR101785722B1 (en) * 2016-10-25 2017-10-16 에스와이스틸텍 주식회사 Insulation Integrated Deck Plate
KR101785721B1 (en) * 2016-11-22 2017-10-16 에스와이스틸텍 주식회사 Deck Plate Spacer
KR20190032909A (en) * 2017-09-20 2019-03-28 대림산업 주식회사 Composite Deck Panel with Lattice Reinforcement and Steel Plate, and Manufacturing Method thereof
KR20190032893A (en) * 2017-09-20 2019-03-28 대림산업 주식회사 Composite Deck with Lattice Reinforcement and Steel Plate, and Manufacturing Method thereof
KR102008148B1 (en) * 2018-03-21 2019-08-07 구연진 Automatic coupling apparatus between deck-plate and truss girder, and combining method between deck-plate and spacer using thereof
KR20190099799A (en) 2018-02-20 2019-08-28 구연진 Apparatus for joining and releasing truss girders
KR20200044405A (en) 2018-10-19 2020-04-29 한국교통대학교산학협력단 Stripping Deck Plate of Move type
KR102174773B1 (en) * 2018-12-03 2020-11-05 대림산업 주식회사 Composite Deck with Lattice Reinforcement and Steel Plate, and Manufacturing Method thereof

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KR20040074818A (en) * 2003-02-19 2004-08-26 인덱스엔지니어링 주식회사 Fabricated deck panel
KR100882464B1 (en) 2008-12-05 2009-02-10 동아에스텍 주식회사 Deck plate with support member
KR101404169B1 (en) 2014-02-07 2014-06-27 주식회사 덕신하우징 Height Adjustable Stripping Deck Plate
KR101452940B1 (en) 2014-06-23 2014-10-23 동아에스텍 주식회사 Functional Deck Plate

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KR100993880B1 (en) * 2010-07-30 2010-11-11 동아에스텍 주식회사 Deck plate with raised bottom materal

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Publication number Priority date Publication date Assignee Title
KR20040074818A (en) * 2003-02-19 2004-08-26 인덱스엔지니어링 주식회사 Fabricated deck panel
KR100882464B1 (en) 2008-12-05 2009-02-10 동아에스텍 주식회사 Deck plate with support member
KR101404169B1 (en) 2014-02-07 2014-06-27 주식회사 덕신하우징 Height Adjustable Stripping Deck Plate
KR101452940B1 (en) 2014-06-23 2014-10-23 동아에스텍 주식회사 Functional Deck Plate

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101590444B1 (en) 2015-04-13 2016-02-02 (주)윈하이텍 Combination structure between deck plate for ceiling mold
KR101660851B1 (en) * 2015-05-19 2016-09-28 (주)윈하이텍 Mold panel construction structure using that binding solidarity for between ceiling mold panel and construction method
KR101639009B1 (en) * 2015-09-18 2016-07-12 구연진 In ceiling mold using truss girder type deck panels, flowing down pour concrete fluid-resistant filler and ceiling mold structure using there of
KR101606439B1 (en) * 2015-09-23 2016-03-25 구연진 Spacer for fixing between truss girder and deck plate combine
KR101656270B1 (en) * 2016-01-19 2016-09-09 구연진 Spacer for insulation combining at truss girder type deck panel and insulation combined truss girder type deck panel using there of
CN106351377A (en) * 2016-09-27 2017-01-25 重庆镪镔实业股份有限公司 Steel bar truss floor deck for industrial buildings and civil buildings as well as mounting method of floor deck
KR101785723B1 (en) * 2016-10-25 2017-10-16 에스와이스틸텍 주식회사 Insulation Integrated Deck Plate
KR101785722B1 (en) * 2016-10-25 2017-10-16 에스와이스틸텍 주식회사 Insulation Integrated Deck Plate
KR101785721B1 (en) * 2016-11-22 2017-10-16 에스와이스틸텍 주식회사 Deck Plate Spacer
KR20190032909A (en) * 2017-09-20 2019-03-28 대림산업 주식회사 Composite Deck Panel with Lattice Reinforcement and Steel Plate, and Manufacturing Method thereof
KR20190032893A (en) * 2017-09-20 2019-03-28 대림산업 주식회사 Composite Deck with Lattice Reinforcement and Steel Plate, and Manufacturing Method thereof
KR102036873B1 (en) * 2017-09-20 2019-10-25 대림산업 주식회사 Composite Deck with Lattice Reinforcement and Steel Plate, and Manufacturing Method thereof
KR102036874B1 (en) * 2017-09-20 2019-10-25 대림산업 주식회사 Composite Deck Panel with Lattice Reinforcement and Steel Plate, and Manufacturing Method thereof
KR20190099799A (en) 2018-02-20 2019-08-28 구연진 Apparatus for joining and releasing truss girders
KR102008148B1 (en) * 2018-03-21 2019-08-07 구연진 Automatic coupling apparatus between deck-plate and truss girder, and combining method between deck-plate and spacer using thereof
KR20200044405A (en) 2018-10-19 2020-04-29 한국교통대학교산학협력단 Stripping Deck Plate of Move type
KR102174773B1 (en) * 2018-12-03 2020-11-05 대림산업 주식회사 Composite Deck with Lattice Reinforcement and Steel Plate, and Manufacturing Method thereof

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