Three-section steel inclined stair non-rigidly fixed on original structure steel beam

Abstract

Three-section steel inclined stair fixed on original structure steel beam in non-rigid manner, comprising three sections of stair beams arranged in sequence from top to bottom, the three sections of stair beams comprising sequentially connected first end section stair beam, middle section two-fold line stair beam and tail section two-fold line stair beam, all comprising main stair beam support formed by channel steel with two opposite notches, wherein the channel steel of the middle section two-fold line stair beam is uniformly and spacedly provided with bolt pair holes for fixing steps, the bolt pair holes being horizontally arranged; the three sections of stair beams are sequentially connected to form Z-shaped steel inclined stair, adjacent stair beam sections being connected through adjustment of the stair beams; the first end section stair beam and the tail section two-fold line stair beam are supported at lower parts on original structure steel beams above and below the stair and are fixed through C-shaped steel beam clamps. The application can make the steel inclined stair match the use requirements of different floor heights and span structures, simultaneously use a large number of standardized tools, and adopt fastening bolts for splicing, so as to facilitate disassembly and assembly of the steel inclined stair and replacement of parts during transportation and maintenance.

Description

Technical Field

[0001] This application pertains to the field of building construction, specifically to a three-section steel inclined staircase that is not rigidly fixed to the original structural steel beams. Background Technology

[0002] Steel structures are widely used in modern public buildings. Due to installation process limitations, the installation of the main structural staircase must lag behind the installation of the steel structure floors. For floors to run parallel to each other, steel pipe ladders or inclined steel staircases are required. Using steel pipe ladders is wasteful of manpower and resources, making it economically unfeasible. Inclined steel staircases, on the other hand, often become unusable due to variations in floor height and span, preventing multiple uses and resulting in cost waste. To address this issue, this invention patent proposes an installation method for an adjustable-height, adjustable-depth steel inclined staircase.

[0003] Currently, the most common approach to solving this problem is to use steel pipes and fasteners to build ladders or to use channel steel and patterned steel plates to weld standardized steel inclined stairs.

[0004] Disadvantages of existing publicly available technologies: Steel pipe fastener ladders cannot be hoisted as a whole. As the construction progresses and the floors are raised, they need to be repeatedly assembled and disassembled, resulting in a significant waste of labor costs. Steel pipe coupler ladders have poor stability and are prone to loose fastener connections or lack of structural measures, which can lead to safety hazards. Steel inclined staircases are welded from channel steel and patterned steel plates. Their dimensions are fixed. To meet the needs of different floor heights and spans, steel inclined staircases need to be reprocessed, resulting in a waste of a lot of manpower, material resources and financial resources. Utility Model Content

[0005] The purpose of this invention is to provide a three-section steel inclined staircase that is non-rigidly fixed to the original structural steel beam, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A three-section steel inclined staircase, non-rigidly fixed to the original structural steel beams, is characterized by: comprising three stair beams arranged sequentially from top to bottom, each consisting of a first end stair beam, a middle two-section stair beam, and a last two-section stair beam connected sequentially, each supported by a main stair beam formed from channel steel with two opposing slots; wherein the middle two-section stair beam has evenly spaced bolt holes for fixing steps on its channel steel, the bolt holes being horizontally arranged; the three stair beams are connected sequentially to form a Z-shaped steel inclined staircase, with adjacent stair beam sections connected by adjusting the stair beams; the lower parts of the first end stair beam and the last two-section stair beam are supported on the original structural steel beams above and below the staircase and fixed by C-shaped steel beam clamps.

[0007] More preferably, the C-shaped steel beam clamp is made of steel plate, and the C-shaped opening is clamped on the upper flange plate of the original structural steel beam. The steel plate is then connected to the channel steel base plate that is attached to the main ladder beam support by bolts.

[0008] Furthermore, the adjustable ladder beams are all made of channel steel, and the adjustable ladder beams are fastened to the joints of the ladder beam sections on both sides and connected to the ladder beam sections by bolts; each adjustable ladder beam is provided with two elongated holes, which are respectively bolted to the channel steel of the ladder beam sections on both sides.

[0009] Furthermore, the step is made of 6mm thick patterned steel plate and includes two side plates and a top plate. The two side plates and the top plate form an inverted U-shaped structure. The inverted U-shaped structure has stiffening ribs inside. The side plates are connected to the bolt holes.

[0010] Furthermore, the first end ladder beam is a type I structure, the middle two-section ladder beam includes a horizontal part and an oblique part, and the tail two-section ladder beam includes an oblique part and a horizontal part.

[0011] In addition, the three-section ladder beams are made of 16a# channel steel, and the adjustable ladder beams are made of 20a# channel steel.

[0012] More preferably, the C-shaped steel beam clamp is made of 12mm thick steel plate.

[0013] Compared with the prior art, this utility model has the following features and beneficial effects: This application enables steel inclined staircases to meet the usage requirements of different floor heights and spans. It also makes extensive use of standardized tools and fastening bolts for splicing, which facilitates the assembly and disassembly of adjustable steel inclined staircases and makes it easier to replace parts during transportation and maintenance. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a three-section steel inclined staircase structure that is not rigidly fixed to the original structural steel beams in this application; Figure 2 This is a diagram illustrating the connection between the steps and the stair beams involved in this application.

[0015] Attached reference numerals: 1-First section end ladder beam; 2-Middle section two-fold ladder beam; 3-Tail section two-fold ladder beam; 4-Adjusting ladder beam; 41-Oblong hole; 5-Bolt hole alignment; 6-Step; 61-Stiffening rib; 7-Original structural steel beam; 8-C-shaped steel beam clamp. Detailed Implementation

[0016] To make the technical means, innovative features, objectives and effects of this utility model easier to understand, the utility model will be further described below.

[0017] The embodiments described herein are specific implementations of this utility model, used to illustrate the concept of this utility model. They are all illustrative and exemplary, and should not be construed as limiting the implementation methods or scope of this utility model. In addition to the embodiments described herein, those skilled in the art can employ other obvious technical solutions based on the content disclosed in the claims and specification of this application. These technical solutions include those that make any obvious substitutions and modifications to the embodiments described herein.

[0018] Example 1 A three-section steel inclined staircase that is not rigidly fixed to the original structural steel beams, such as... Figure 1 and 2 As shown, the staircase includes three sections of ladder beams arranged sequentially from top to bottom. The three sections of ladder beams include the first end ladder beam 1, the middle two-section ladder beam 2, and the last two-section ladder beam 3, which are connected sequentially. Each section of ladder beam is supported by a main ladder beam made of channel steel with two opposing slots. The middle two-section ladder beam 2 has bolt holes 5 evenly spaced on its channel steel for fixing the steps 6. The bolt holes 5 include two horizontally arranged bolt holes. The three sections of ladder beams are connected sequentially to form a Z-shaped steel inclined staircase. Adjacent ladder beam sections are connected by adjusting ladder beams 4. The lower parts of the first end ladder beam 1 and the last two-section ladder beam 3 are supported on the original structural steel beams 7 above and below the staircase and fixed by C-shaped steel beam clamps 8.

[0019] The C-shaped steel beam clamp 8 is made of steel plate. The C-shaped opening is clamped on the upper flange plate of the original structural steel beam 7. The steel plate is connected to the channel steel base plate that is attached to the main ladder beam support by bolts. The adjusting ladder beams 4 are all made of channel steel. The adjusting ladder beams 4 are fastened to the joint of the ladder beam sections on both sides and connected to the ladder beam sections by bolts. Each adjusting ladder beam 4 is provided with two elongated holes 41, and the two elongated holes 41 are respectively bolted to the channel steel of the ladder beam sections on both sides.

[0020] Example 2 Based on Embodiment 1, the step 6 is made of 6mm thick patterned steel plate and includes two side plates and a top plate. The two side plates and the top plate form an inverted U-shaped structure. The inverted U-shaped structure is provided with stiffening ribs 61. The side plates are bolted to the bolt holes 5.

[0021] The first end ladder beam 1 is a type I structure, the middle two-section ladder beam 2 includes a horizontal part and a diagonal part, the tail two-section ladder beam 3 includes a diagonal part and a horizontal part, the three ladder beams 16a# channel steel are formed, the adjusting ladder beam 4 is formed by 20a# channel steel, and the C-shaped steel beam clamp fixing 8 is formed by 12mm thick steel plate.

[0022] The three-section ladder beam forms two main connection nodes, located horizontally and diagonally respectively, reducing the number of diagonal connection points and enhancing the overall load-bearing capacity of the ladder beam.

[0023] Example 3 The installation method of the adjustable steel inclined staircase includes the following: the adjustable steel inclined staircase is made of 16a# channel steel to construct the end beams, middle beams, and end beams. The end beams and end beams are fixed to the structural steel beams using steel beam clamps, and the steel beam clamps are fixed to the end beams and end beams using fastening bolts. Adjustable beams made of 20a# channel steel are used between the end beams and the middle beams, and between the middle beams and the end beams, respectively, and are fixed with fastening bolts. Two sets of elongated holes are provided on the adjustable beams for adjusting the overall height and depth of the beams. The treads of the steel inclined staircase are made of 6mm checkered steel plate and are fixed to the middle beams using fastening bolts. Reinforcing ribs are provided in the middle of the treads to prevent deformation.

[0024] Working Principle: The adjustable steel staircase features adjustable stair beams at the joints of the end, middle, and end beams, along with oblong holes, allowing for free adjustment of its height and depth. Simultaneously, the steel beam clamps ensure the safety and stability of the staircase's fixation to the steel beams. The adjustable staircase steps and fastening bolts facilitate easy assembly and disassembly, as well as convenient replacement of parts during transportation and maintenance.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0026] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A three-section steel inclined staircase that is not rigidly fixed to the original structural steel beam, characterized in that: The staircase includes three sections of ladder beams arranged sequentially from top to bottom. The three sections of ladder beams include the first end ladder beam (1), the middle two-section ladder beam (2), and the last two-section ladder beam (3) connected sequentially. Each section of ladder beams includes a main ladder beam support made of channel steel with two slots facing away from each other. The channel steel of the middle two-section ladder beam (2) is provided with bolt holes (5) for fixing the steps (6) at even intervals. The bolt holes (5) are arranged horizontally. The three sections of ladder beams are connected sequentially to form a Z-shaped steel inclined staircase. Adjacent ladder beam sections are connected by adjusting ladder beams (4). The lower part of the first end ladder beam (1) and the last two-section ladder beam (3) is supported on the original structural steel beams (7) above and below the staircase and fixed (8) by C-shaped steel beam clamps.

2. The three-section steel inclined staircase non-rigidly fixed to the original structural steel beam as described in claim 1, characterized in that: The C-shaped steel beam clamp (8) is made of steel plate. The C-shaped opening is clamped on the upper flange of the original structural steel beam (7). The steel plate is then connected to the channel steel bottom plate that is attached to the main ladder beam support by bolts.

3. The three-section steel inclined staircase non-rigidly fixed to the original structural steel beam as described in claim 1, characterized in that: The adjustable ladder beams (4) are all made of channel steel. The adjustable ladder beams (4) are fastened to the joints of the ladder beam sections on both sides and connected to the ladder beam sections by bolts. Each adjustable ladder beam (4) is provided with two elongated holes (41), which are bolted to the channel steel of the ladder beam sections on both sides respectively.

4. The three-section steel inclined staircase non-rigidly fixed to the original structural steel beam as described in claim 1, characterized in that: The step (6) is made of 6mm thick patterned steel plate and includes two side plates and a top plate. The two side plates and the top plate form an inverted U-shaped structure. The inverted U-shaped structure is provided with stiffening ribs (61). The side plates are bolted to the bolt holes (5).

5. The three-section steel inclined staircase non-rigidly fixed to the original structural steel beam as described in claim 1, characterized in that: The first end ladder beam (1) is a type of structure, the middle two-section ladder beam (2) includes a horizontal part and an oblique part, and the tail two-section ladder beam (3) includes an oblique part and a horizontal part.

6. The three-section steel inclined staircase non-rigidly fixed to the original structural steel beam as described in claim 1, characterized in that: The three-section ladder beam is made of 16a# channel steel, and the adjustable ladder beam (4) is made of 20a# channel steel.

7. The three-section steel inclined staircase, non-rigidly fixed to the original structural steel beam as described in any one of claims 1 to 6, is characterized in that: The C-shaped steel beam clamp (8) is made of 12mm thick steel plate.

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