CN114250927A - Stair temporary railing construction structure and construction method thereof - Google Patents

Stair temporary railing construction structure and construction method thereof Download PDF

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Publication number
CN114250927A
CN114250927A CN202111527368.XA CN202111527368A CN114250927A CN 114250927 A CN114250927 A CN 114250927A CN 202111527368 A CN202111527368 A CN 202111527368A CN 114250927 A CN114250927 A CN 114250927A
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China
Prior art keywords
embedded part
stair
support
temporary
embedded
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Pending
Application number
CN202111527368.XA
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Chinese (zh)
Inventor
李可捷
贺志国
林兴海
程安安
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Ningbo Construction Engineering Group Co ltd
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Ningbo Construction Engineering Group Co ltd
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Application filed by Ningbo Construction Engineering Group Co ltd filed Critical Ningbo Construction Engineering Group Co ltd
Priority to CN202111527368.XA priority Critical patent/CN114250927A/en
Publication of CN114250927A publication Critical patent/CN114250927A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04FFINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F11/00Stairways, ramps, or like structures; Balustrades; Handrails
    • E04F11/18Balustrades; Handrails
    • E04F11/181Balustrades
    • E04F11/1812Details of anchoring to the wall or floor
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/32Safety or protective measures for persons during the construction of buildings

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Steps, Ramps, And Handrails (AREA)

Abstract

The invention relates to a construction structure of a temporary stair railing and a construction method thereof, wherein the construction structure comprises a stair, an embedded part, a support and a temporary stair railing, the embedded part is embedded and fixed on the side surface of the stair, the exposed end surface of the embedded part is flush with the side surface of the stair, an opening with a T-shaped section is arranged on the exposed end surface of the embedded part, a limiting cavity is arranged in the opening, the support is provided with a limiting block matched with a transverse hole of the opening and a support rod sliding relative to a vertical hole of the opening, when the limiting block enters the limiting cavity along the transverse hole, the support rod and the vertical hole slide and slide to the bottom along the limiting cavity along with the limiting block, the support and the embedded part form locking and fixing, and finally, a vertical sleeve of the temporary stair railing is connected with a vertical rod inserting sleeve integrated with the support, so that the construction of the temporary stair railing is completed. The structure is simple and reliable, installation and construction are convenient and rapid, construction efficiency is greatly improved, the embedded part can be repeatedly used, input cost is low, and the stair guardrail construction structure is suitable for being used as a stair guardrail construction structure in the building field.

Description

Stair temporary railing construction structure and construction method thereof
Technical Field
The invention relates to the field of building construction, in particular to a construction structure of a temporary stair railing and a construction method thereof.
Background
The stairs are members used for vertical traffic between floors in buildings and are used for traffic communication between floors or when the height difference is large. Building construction stage, stair are the semi-manufactured goods state usually, for the security of guaranteeing the construction stage stair use, can set up interim guardrail structure usually. For example, the utility model discloses a temporary protection railing for stairs, which is named as "a temporary protection railing for stairs" in the publication of the chinese patent publication No. CN204609341U in the publication of chinese patent document, in 2015, in 2.2.9.3.a scheme for fixing the protection railing to the side of the stairs, mainly using a base to match a bolt to fix the protection railing to the side of the stairs. Although the fixing mode that adopts the bolt spare is feasible, needs stair side trompil or pre-buried screw seat, and the mode that adopts the trompil destroys the stair side easily, leads to repairing the difficulty, and the mode that adopts pre-buried screw seat is simple and convenient, but the specification requirement of bolt and screw seat is higher, needs the on-the-spot connection, comparatively wastes time and energy, and intensity of labour is great, and efficiency is not high. Like the publication of chinese patent document No. CN212317538U, publication of No. 2021, 1/8/d, the utility model discloses a temporary stair protection device for building construction, which discloses a handrail structure fixed to a stair by clamping. Therefore, the construction structure of the existing temporary stair guardrail is to be improved.
Disclosure of Invention
In order to overcome the defects, the invention aims to provide a temporary stair railing construction structure and a construction method thereof for the field, so that the technical problems of inconvenience in construction and installation, low efficiency and high input cost of the conventional similar structures are solved. The purpose is realized by the following technical scheme.
A construction structure of temporary stair railing, which comprises a stair, an embedded part, a support and a temporary stair railing, the structure is characterized in that the embedded part is embedded and fixed on the side surface of the stair, the exposed end surface of the embedded part is flush with the side surface of the stair, the exposed end surface of the embedded part is provided with a hole with a T-shaped section, namely, the opening is in a T shape formed by a transverse hole at the upper part and a vertical hole at the lower part, the inner side of the opening of the embedded part is provided with a limit cavity, the support is provided with a limiting block matched with the opening and a supporting rod in sliding fit with the vertical hole of the opening, when the limiting block enters the limiting cavity along the transverse hole of the embedded part, the supporting rod is in sliding fit with the vertical hole of the embedded part, and when the limiting block slides downwards to the bottom along the limiting cavity, the support and the embedded part form locking fixation, and the support is integrally provided with a vertical rod for connecting the vertical sleeve in the temporary handrail through the vertical plug bush. Through the structure, the sliding locking of the support and the embedded part is adopted, and the vertical upright rod of the support is integrated, so that the connection between the temporary handrail and the support and between the support and the side surface of the stair is convenient and quick, the labor intensity is low, and the construction efficiency is greatly improved.
The embedded part is fixed on the stair in an embedded mode through a detachable bolt part, namely, one side, back to the opening, of the embedded part is fixedly connected with a bolt and a nut, a bolt cap of the bolt is fixed in the stair in an embedded mode, the nut penetrates through a vertical hole of the embedded part to enter the embedded part and be locked with the bolt, namely, the embedded part is fixed with the stair, and the bolt and the nut are not interfered with the limiting block to slide in the limiting cavity. Through this structure, the built-in fitting can be fixed with the stair side when dispatching from the factory and accomplish, and the built-in fitting is pre-buried and fixed through bolt nut simultaneously, and the structure is comparatively firm reliable. The loaded down with trivial details of on-the-spot assembly has been removed from during the installation, and the nut is dismantled in the later stage according to actual need, when the built-in fitting needs used repeatedly, to deviate from the stair side with the built-in fitting, if do not need used repeatedly, then directly to built to closely knit the packing in the built-in fitting can, construction operation is comparatively convenient.
The limiting block of the support is a rectangular block, the limiting cavity of the embedded part is a rectangular cavity, the supporting rod of the support is a rectangular rod, and the vertical hole of the embedded part is a rectangular hole. Through this structure, the support is connected comparatively reliably, stably with the built-in fitting.
And after the limiting cavity of the embedded part is matched with the limiting block of the support, the embedded part is poured and filled compactly or is filled with a temporary filler for limiting. Through the structure, the support and the embedded part are fixed reliably, and the support is not easy to separate from the embedded part. When the support is as the mount pad of final guardrail, then adopt the closely knit scheme of pouring the packing in the spacing intracavity of built-in fitting, when the support needs to be dismantled, then adopt the scheme that interim filler was packed into in the spacing intracavity.
The construction method of the temporary stair railing construction structure comprises the following steps:
the method comprises the following steps: embedding and fixing the embedded part on the side surface in the stair when the embedded part is poured along with the stair, wherein the exposed end surface of the embedded part is flush with the side surface of the stair; step two: inserting a limiting block of the support into a limiting cavity of the embedded part along the opening of the embedded part, and sliding the support downwards to complete supporting and fixing of the support and the embedded part; step three: fixing the sleeve of the temporary handrail and the upright rod plug bush of the support to complete the erection of the temporary handrail; step four: when the temporary handrail and the support are required to be removed, the temporary handrail and the support can be removed according to the reverse operation; step five: after the temporary handrail and the support are removed, the hole of the embedded part on the stair side is densely filled through pouring to form a smooth stair side surface.
The other construction method of the temporary stair railing construction structure comprises the following steps:
the method comprises the following steps: one side of the embedded part, which is back to the hole, is connected with a bolt part consisting of a bolt and a nut, and a filler is temporarily plugged into a limiting cavity of the embedded part to pre-fix the bolt and the nut; step two: embedding and fixing the embedded part and the bolt in the stair when pouring along with the stair, wherein the exposed end surface of the embedded part is flush with the side surface of the stair; step three: taking out the filler in the embedded part limiting cavity, inserting the limiting block of the support into the limiting cavity of the embedded part along the opening of the embedded part, and sliding the support downwards to complete the supporting and fixing of the support and the embedded part; step four: fixing the sleeve of the temporary handrail and the upright rod plug bush of the support to complete the erection of the temporary handrail; step five: when the temporary handrail and the support are required to be removed, the temporary handrail and the support can be removed according to the reverse operation; step six: after the temporary handrail and the support are dismantled, the embedded part is separated from the bolt by screwing the nut in the embedded part, the embedded part is separated from the side face of the stair, and the embedded part slot of the side face of the stair is poured compactly to form a smooth side face of the stair. By the method, the embedded part can be repeatedly used, the slotted hole is poured and leveled after the embedded part is taken out, and the pouring firmness is high.
The embedded part is arranged on the side surface of the stair, so that an image used on the surface of the stair is small, the embedded part can be detached and reused, the investment cost is low, and the embedded part is suitable for being used as a stair guardrail construction structure in the field of buildings or improvement of the similar construction structure.
Drawings
Fig. 1 is a schematic diagram of an embedded part embedding structure of the invention.
Fig. 2 is a side view of the structure of fig. 1.
FIG. 3 is a schematic view of the fitting structure of the pedestal and the embedded part according to the present invention.
Fig. 4 is a partial sectional structural schematic view of the present invention.
FIG. 5 is a schematic side view of the completed construction of the present invention.
The sequence numbers and names in the figure are: 1. stair, 2, built-in fitting, 201, cross bore, 202, vertical hole, 203, spacing chamber, 204 nut mounting groove, 3, bolt, 4, nut, 5, support, 501, stopper, 502, branch, 503, pole, 6, interim railing, 601, sleeve pipe.
Detailed Description
The invention will now be further described with reference to the accompanying drawings.
As shown in fig. 1-5, the temporary stair railing construction structure comprises a stair 1, an embedded part 2, a support 5 and a temporary stair railing 6, wherein a support main body of the temporary stair railing is a sleeve 601, the upper end of the sleeve is connected with a handrail, and adjacent sleeves are fixedly connected with a stabilizer bar through bolts or welding. The embedded part is the steel construction and when pouring along with stair the side of pre-buried being fixed in the stair, the exposed terminal surface of embedded part flushes with the stair side, the exposed terminal surface of embedded part is equipped with the trompil that the cross-section is T shape, the trompil forms T shape by cross bore 201 on upper portion and the vertical hole 202 of lower part promptly, the trompil inboard of embedded part is equipped with spacing chamber 203, the support is equipped with the cross bore assorted stopper 501 with the trompil, and form sliding fit's branch 502 with the vertical hole of trompil, when the stopper gets into spacing chamber along the cross bore of embedded part, branch forms sliding fit with the vertical hole of embedded part, and when the stopper glides to the end along spacing chamber, the support forms the locking with the embedded part and fixes. The limiting block of the support is a rectangular block, the limiting cavity of the embedded part is a rectangular cavity, the supporting rod of the support is a rectangular rod, and the vertical hole of the embedded part is a rectangular hole, so that the matched connection is reliable and stable. The support rod of the support is integrated with a vertical upright 503 for connecting with a sleeve insert of a temporary railing. One side of the embedded part back to the hole is provided with two connecting holes, the connecting holes are connected with bolts 3, the bolts are connected with nuts 4, and the nuts are located in nut mounting grooves 204 formed in the inner side of the limiting cavity of the embedded part, namely the nuts are located in the nut mounting grooves and do not interfere with the sliding of limiting blocks in the limiting cavity. After the bolt is connected with the nut, the end part of the bolt extending into the embedded part is also kept to be positioned in the nut mounting groove and not to interfere with the sliding of the limiting block in the limiting cavity. When the embedded part is embedded, the filler is inserted into the limiting cavity of the embedded part in advance to pre-fix the nut and the bolt, and then the stair is poured, so that the bolt cap of the bolt is reliably embedded in the stair, and the embedded part is ensured to be reliably embedded and fixed.
The specific construction method of the construction structure comprises the following steps:
the method comprises the following steps: and one side of the embedded part 2 back to the hole is connected with a bolt part consisting of a bolt 3 and a nut 4, and a filler is temporarily plugged into the limiting cavity 203 of the embedded part to pre-fix the bolt and the nut.
Step two: when the embedded parts and the bolts are poured along the staircase 1, the embedded parts and the bolts are embedded and fixed in the staircase, and the exposed end surfaces of the embedded parts are flush with the side surfaces of the staircase.
Step three: and (3) taking out the filler in the limit cavity of the embedded part, inserting the limit block 501 of the support 5 into the limit cavity 203 of the embedded part along the opening of the embedded part, and sliding the support downwards to complete the supporting and fixing of the support and the embedded part. If the support is simultaneously used as the mounting seat of the final stair, the support can be densely poured in the open hole of the embedded part, so that the support and the embedded part are fixedly connected into a whole. If the support needs to be dismantled in the later stage, then the stopper of support is spacing to temporary filler is filled in to spacing intracavity, prevents effectively that the support from deviating from for the built-in fitting to carry out following further operation.
Step four: and (3) fixing the sleeve 601 of the temporary handrail 6 and the upright 503 of the support in an inserting way to complete the erection of the temporary handrail.
Step five: when the temporary handrail and the support are required to be removed, the temporary handrail and the support can be removed by operating in the reverse direction.
Step six: after the temporary handrail and the support are dismantled, the embedded part 2 is separated from the bolt by screwing the nut 3 in the embedded part, so that the embedded part can be separated from the side face of the stair, and the embedded part can be reused. The embedded part slot of stair side is pour closely knit, can form smooth stair side, and it is comparatively convenient to repair the construction.
The above description is intended to illustrate the technical means of the present invention, and not to limit the technical scope of the present invention. Obvious modifications or alterations to the present invention in combination with the prior art knowledge will be apparent to those skilled in the art and fall within the scope of the appended claims.

Claims (6)

1. A temporary stair railing construction structure comprises a stair (1), an embedded part (2), a support (5) and a temporary stair railing (6), and is characterized in that the embedded part (2) is embedded and fixed on the side surface of the stair (1), the exposed end surface of the embedded part is flush with the side surface of the stair, the exposed end surface of the embedded part is provided with a hole with a T-shaped cross section, namely the hole is T-shaped formed by a cross hole (201) at the upper part and a vertical hole (202) at the lower part, a limiting cavity (203) is arranged on the inner side of the hole of the embedded part, the support is provided with a limiting block (501) matched with the cross hole of the hole and a support rod (502) in sliding fit with the vertical hole of the hole, when the limiting block enters the limiting cavity along the cross hole of the embedded part, the support rod is in sliding fit with the vertical hole of the embedded part, and when the limiting block slides downwards along the limiting cavity, the support and the embedded part form locking fixation, and the support is integrally provided with a vertical rod (503) for connecting a vertical sleeve (601) in the temporary railing (6) through a vertical plug bush.
2. The temporary stair railing construction structure according to claim 1, wherein the embedded part (2) is fixed in the stair (1) through a detachable bolt part embedded in advance, namely, one side of the embedded part, which faces away from the opening, is fixedly connected with the bolt (3) and the nut (4), a bolt cap of the bolt is embedded in the stair in advance and fixed in the stair, the nut penetrates through a vertical hole of the embedded part to enter the embedded part and is locked with the bolt, namely, the embedded part is fixed with the stair, and the bolt and the nut do not interfere with the sliding of the limiting block (501) in the limiting cavity (203).
3. The construction structure of the temporary railing for the stairs according to claim 1, wherein the limit block (501) of the support (5) is a rectangular block, the limit cavity (203) of the embedded part (2) is a rectangular cavity, the support rod (502) of the support is a rectangular rod, and the vertical hole (202) of the embedded part (2) is a rectangular hole.
4. The construction structure of the temporary stair railing according to claim 1, wherein the limiting cavity (203) of the embedded part (2) is matched with the limiting block (501) of the support (5) and then is poured and filled compactly or is plugged with a temporary filler for limiting.
5. A construction method of a temporary stair railing construction structure according to claim 1, characterized in that the method comprises the following steps:
the method comprises the following steps: when the embedded part (2) is poured along with the stair (1), the embedded part is embedded and fixed on the inner side surface of the stair, and the exposed end surface of the embedded part is flush with the side surface of the stair;
step two: inserting a limiting block (501) of the support (5) into a limiting cavity (203) of the embedded part along the opening of the embedded part, and sliding the support downwards to complete supporting and fixing of the support and the embedded part;
step three: fixing a sleeve (601) of the temporary handrail (6) with an upright (503) of a support in an inserting way to complete the erection of the temporary handrail;
step four: when the temporary handrail and the support are required to be removed, the temporary handrail and the support can be removed according to the reverse operation;
step five: after the temporary handrail and the support are removed, the hole of the embedded part on the stair side is densely filled through pouring to form a smooth stair side surface.
6. A construction method of a temporary stair railing construction structure according to claim 2, characterized in that the method comprises the following steps:
the method comprises the following steps: one side of the embedded part (2) back to the hole is connected with a bolt part consisting of a bolt (3) and a nut (4), and a filler is temporarily plugged into a limiting cavity (203) of the embedded part to pre-fix the bolt and the nut;
step two: when the embedded part and the bolt are poured along with the stair (1), the embedded part and the bolt are embedded and fixed in the stair, and the exposed end surface of the embedded part is flush with the side surface of the stair;
step three: taking out the filler in the limiting cavity of the embedded part, inserting the limiting block (501) of the support (5) into the limiting cavity (203) of the embedded part along the opening of the embedded part, and sliding the support downwards to complete the supporting and fixing of the support and the embedded part;
step four: fixing a sleeve (601) of the temporary handrail (6) with an upright (503) of a support in an inserting way to complete the erection of the temporary handrail;
step five: when the temporary handrail needs to be removed, the support is reversely pulled out of the embedded part, and then the removal of the temporary handrail and the support can be completed;
step six: after the temporary handrail and the support are dismantled, the embedded part is separated from the bolt by screwing the nut in the embedded part, the embedded part is separated from the side face of the stair, and the embedded part slot of the side face of the stair is poured compactly to form a smooth side face of the stair.
CN202111527368.XA 2021-12-14 2021-12-14 Stair temporary railing construction structure and construction method thereof Pending CN114250927A (en)

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Application Number Priority Date Filing Date Title
CN202111527368.XA CN114250927A (en) 2021-12-14 2021-12-14 Stair temporary railing construction structure and construction method thereof

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Application Number Priority Date Filing Date Title
CN202111527368.XA CN114250927A (en) 2021-12-14 2021-12-14 Stair temporary railing construction structure and construction method thereof

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Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09256586A (en) * 1996-03-19 1997-09-30 Dantani Plywood Co Ltd Handrail structure
KR200352486Y1 (en) * 2004-03-16 2004-06-04 남원순 A safety balustrade
CN201033946Y (en) * 2007-04-23 2008-03-12 杨成兴 Special jacket stand set for temporary rail of steel stair
KR20080109133A (en) * 2007-06-12 2008-12-17 씨티코리아(주) Construction method of an anchor driving in a window wall of building and structure thereof
CN201915506U (en) * 2010-12-28 2011-08-03 中建三局第二建设工程有限责任公司 Embedded fitting for railing bases
CN204609341U (en) * 2015-05-19 2015-09-02 赵英华 A kind of staircase temporary protective railing
CN206800649U (en) * 2017-06-19 2017-12-26 四川建筑职业技术学院 A kind of pre-buried solid bowl assembly for building industry
CN207363291U (en) * 2017-10-18 2018-05-15 中天建设集团有限公司 A kind of dedicated guard rail of precast stair
CN207484699U (en) * 2017-05-08 2018-06-12 四川蒂森道源轨道交通材料有限公司 T-bolt and pre-buried fixation kit
CN109339247A (en) * 2018-11-12 2019-02-15 中国十七冶集团有限公司 A kind of split type built-in fitting of precast stair and its application method
CN208857972U (en) * 2018-09-14 2019-05-14 中国建筑第七工程局有限公司 Built-in fitting
CN209523407U (en) * 2018-12-17 2019-10-22 广州市施劳德活动房材料有限公司 A kind of Split assembled plug-in stair
CN209742088U (en) * 2019-02-01 2019-12-06 山东天齐置业集团股份有限公司 Assembled porcelain powder self preservation temperature wallboard fixed knot constructs
CN209924119U (en) * 2019-01-16 2020-01-10 中国核工业华兴建设有限公司 Inclined strut foot fixing embedded part for vertical prefabricated part of assembly structure
CN210370001U (en) * 2019-06-28 2020-04-21 福建天匠加装电梯工程有限公司 Embedded part for adding elevator shaft column base to existing house
CN210508129U (en) * 2019-05-29 2020-05-12 山西五建集团有限公司 Integrated stair protective rail with decorative structure
CN211923288U (en) * 2020-03-24 2020-11-13 广州盈德建筑工程有限公司 Concrete prefabricated staircase
CN212317538U (en) * 2020-04-30 2021-01-08 青岛金沙滩建设集团有限公司 Interim stair protector that uses of construction is built in room
CN213174198U (en) * 2020-07-10 2021-05-11 浙江亚厦幕墙有限公司 Plate groove embedded part convenient to install
CN214364545U (en) * 2021-01-12 2021-10-08 中建科技(湖州)有限公司 Embedded part structure of stair railing
CN214785464U (en) * 2021-01-30 2021-11-19 珠海市世纪建设工程有限公司 Concrete prefabricated staircase
CN215106739U (en) * 2021-04-09 2021-12-10 中国建筑第五工程局有限公司 Embedded part of guardrail

Patent Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09256586A (en) * 1996-03-19 1997-09-30 Dantani Plywood Co Ltd Handrail structure
KR200352486Y1 (en) * 2004-03-16 2004-06-04 남원순 A safety balustrade
CN201033946Y (en) * 2007-04-23 2008-03-12 杨成兴 Special jacket stand set for temporary rail of steel stair
KR20080109133A (en) * 2007-06-12 2008-12-17 씨티코리아(주) Construction method of an anchor driving in a window wall of building and structure thereof
CN201915506U (en) * 2010-12-28 2011-08-03 中建三局第二建设工程有限责任公司 Embedded fitting for railing bases
CN204609341U (en) * 2015-05-19 2015-09-02 赵英华 A kind of staircase temporary protective railing
CN207484699U (en) * 2017-05-08 2018-06-12 四川蒂森道源轨道交通材料有限公司 T-bolt and pre-buried fixation kit
CN206800649U (en) * 2017-06-19 2017-12-26 四川建筑职业技术学院 A kind of pre-buried solid bowl assembly for building industry
CN207363291U (en) * 2017-10-18 2018-05-15 中天建设集团有限公司 A kind of dedicated guard rail of precast stair
CN208857972U (en) * 2018-09-14 2019-05-14 中国建筑第七工程局有限公司 Built-in fitting
CN109339247A (en) * 2018-11-12 2019-02-15 中国十七冶集团有限公司 A kind of split type built-in fitting of precast stair and its application method
CN209523407U (en) * 2018-12-17 2019-10-22 广州市施劳德活动房材料有限公司 A kind of Split assembled plug-in stair
CN209924119U (en) * 2019-01-16 2020-01-10 中国核工业华兴建设有限公司 Inclined strut foot fixing embedded part for vertical prefabricated part of assembly structure
CN209742088U (en) * 2019-02-01 2019-12-06 山东天齐置业集团股份有限公司 Assembled porcelain powder self preservation temperature wallboard fixed knot constructs
CN210508129U (en) * 2019-05-29 2020-05-12 山西五建集团有限公司 Integrated stair protective rail with decorative structure
CN210370001U (en) * 2019-06-28 2020-04-21 福建天匠加装电梯工程有限公司 Embedded part for adding elevator shaft column base to existing house
CN211923288U (en) * 2020-03-24 2020-11-13 广州盈德建筑工程有限公司 Concrete prefabricated staircase
CN212317538U (en) * 2020-04-30 2021-01-08 青岛金沙滩建设集团有限公司 Interim stair protector that uses of construction is built in room
CN213174198U (en) * 2020-07-10 2021-05-11 浙江亚厦幕墙有限公司 Plate groove embedded part convenient to install
CN214364545U (en) * 2021-01-12 2021-10-08 中建科技(湖州)有限公司 Embedded part structure of stair railing
CN214785464U (en) * 2021-01-30 2021-11-19 珠海市世纪建设工程有限公司 Concrete prefabricated staircase
CN215106739U (en) * 2021-04-09 2021-12-10 中国建筑第五工程局有限公司 Embedded part of guardrail

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