CN215330869U

CN215330869U - Steel construction conversion furred ceiling

Info

Publication number: CN215330869U
Application number: CN202120844453.8U
Authority: CN
Inventors: 吴昊; 聂克亮; 钟萍
Original assignee: Shenzhen Building Decoration Group Co ltd
Current assignee: Shenzhen Building Decoration Group Co ltd
Priority date: 2021-04-22
Filing date: 2021-04-22
Publication date: 2021-12-28
Anticipated expiration: 2031-04-22

Abstract

The utility model provides a steel structure conversion suspended ceiling which comprises a switching unit (1) and a suspended ceiling unit (2); the switching unit (1) comprises an h-shaped clamp body (11) and a C-shaped switching piece (12); the h-shaped clamp body (11) comprises a long side and a short side, the long side and the short side clamp the flange of the I-shaped beam together, and the long side of the h-shaped clamp body is abutted against the upper wing plate of the C-shaped adapter (12); the C-shaped adaptor (12) comprises a C-shaped main adaptor (123) and a C-shaped flank adaptor (124), wherein the C-shaped flank adaptor (124) is connected to one end or two ends of the C-shaped main adaptor (123) through a hinge (125); the suspended ceiling unit (2) comprises a suspended rib (21), a keel layer (22) and a decoration layer (23). The steel structure conversion suspended ceiling has the advantages of convenience in installation, strong adaptability, attractiveness, light weight, safety, stability and the like.

Description

Steel construction conversion furred ceiling

Technical Field

The utility model relates to a suspended ceiling structure, in particular to a steel structure conversion suspended ceiling.

Background

Steel structure building is a new type of building system, which breaks through the industry boundaries between the land industry, the building industry and the metallurgical industry. Steel structure buildings are usually constructed by building structural steel and steel plate made beam, column, truss and other members to form a bearing structure, and the bearing structure and roof, floor and wall surface and other building envelope structure together form a building. The commonly used building section steel comprises angle steel, channel steel, I-shaped steel, H-shaped steel, steel pipes and the like which are formed by hot rolling. Compared with the traditional concrete building, the concrete building has the advantages that the structural steel or the steel plate replaces a concrete structure, the strength is higher, the shock resistance is better, the industrialization degree is high, the field installation is convenient, in addition, the steel can be repeatedly used, the building rubbish can be greatly reduced, and the environment is more green and environment-friendly, so the concrete building is gradually and widely adopted by various countries in the world and is applied to industrial and civil buildings. However, steel materials also have problems of poor rust resistance and poor fire resistance.

When the inside of a steel structure building is constructed, if the I-shaped beam is used as a bearing part to hoist equipment or install other decorative structures, the I-shaped beam is not allowed to be directly welded on the I-shaped beam, and the structural stability of the I-shaped beam is easily damaged by welding, and an anti-corrosion layer or a fireproof layer on the surface of the I-shaped beam can be damaged. Meanwhile, the I-beam is special in shape, is difficult to stably clamp simply and has the danger of easy falling, so that a special clamp is needed for fixing, but the existing clamp is complex in structure, more in parts and inflexible in disassembly, and can also cause abrasion to a protective layer of the I-beam.

In interior decoration, the furred ceiling structure can shield precast beam, the drain pipe etc. at indoor top, still can carry out the molding design, obtains the indoor environment that has the aesthetic feeling. However, the existing hoisting structure is single in shape, and limited in applicability in irregular spaces, narrow spaces or places with obstacles, and when the suspended ceiling is installed in these places, the special hoisting structure needs to be customized, and a lot of time is consumed for extra assembling work, which wastes time and labor, and may affect the schedule of a construction period.

Therefore, the ceiling structure which is simple in structure, protects the steel structure and is high in adaptability needs to be researched and developed urgently at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provides a steel structure conversion suspended ceiling which is convenient to install, strong in adaptability, attractive, light, safe and stable.

In order to achieve the purpose, the utility model provides a steel structure conversion suspended ceiling which comprises a conversion unit 1 and a suspended ceiling unit 2. The adapter unit 1 comprises an h-shaped clamp body 11 and a C-shaped adapter 12; the h-shaped clamp body 11 comprises a long side and a short side, the long side and the short side clamp the flange of the I-shaped beam together, and the long side of the h-shaped clamp body abuts against the upper wing plate of the C-shaped adapter 12; a first bolt hole 111 is formed in the short side of the h-shaped clamp body 11, and a first bolt 112 penetrates through the first bolt hole 111 and is fastened to the flange of the I-beam; a first slot hole 113 is formed in the long side of the h-shaped clamp body 11, a second bolt hole 121 is formed in the upper wing plate of the C-shaped adapter 12, and a second bolt 122 penetrates through the first slot hole 113 and the second bolt hole 121 to fix the h-shaped clamp body 11 on the C-shaped adapter 12; the C-shaped adaptor 12 includes a C-shaped main adaptor 123 and a C-shaped wing adaptor 124, wherein the C-shaped wing adaptor 124 is connected to one or both ends of the C-shaped main adaptor 123 by hinges 125. The suspended ceiling unit 2 comprises suspended ribs 21, a keel layer 22 and a decoration layer 23; the hanging ribs 21 are connected to the lower wing plate of the C-shaped adapter 12, a keel layer 22 is fixed on the hanging ribs 21, and a decoration layer 23 is fixed on the lower side of the keel layer 22.

An i-beam is an elongated member with an i-shaped cross-section, and the flanges of the i-beam are generally the two transverse plates of the i-beam. The section of the h-shaped clamp body is approximately in the shape of a lower case letter h, and the section of the C-shaped adapter piece is approximately in the shape of an upper case letter C. The first bolt is mainly used for fastening the flange of the I-shaped beam in the h-shaped clamp body, and the second bolt is mainly used for fixing the h-shaped clamp body and the C-shaped adapter. The first bolt and the second bolt may be stainless steel bolts. The lower side of the C-shaped adapter is mainly used for connecting, fixing and hoisting related equipment, facilities or decorative structures. The h-shaped clip is generally fixed to the C-shaped main adapter, since the C-shaped wing adapter is hinged to the C-shaped main adapter, which is usually movable.

The steel structure conversion suspended ceiling comprises hanging ribs 21, wherein the diameters of the hanging ribs 21 are 5mm-20mm, and the distances among the hanging ribs 21 are 500-1000 mm.

The steel structure conversion suspended ceiling comprises a keel layer 22, a hanging rib 21 and a steel structure conversion suspended ceiling, wherein the keel layer comprises main keels connected with the hanging ribs 21 and auxiliary keels vertically and crosswise connected with the main keels; the decorative layer 23 is a plurality of aluminum honeycomb panels. The aluminum honeycomb plate is a composite plate which takes an aluminum honeycomb as a core material and is adhered with aluminum plates on two sides. The aluminum honeycomb plate has the characteristics of light weight, small density, high specific strength, heat insulation, sound insulation, fire prevention, moisture prevention and the like, and the aluminum alloy has no radioactivity, can not volatilize harmful gas which is unfavorable for the health of a human body, can be completely recycled, and is energy-saving and environment-friendly.

According to the steel structure conversion suspended ceiling, the main keel and the auxiliary keel are light steel keels or aluminum alloy keels; the thickness of the aluminum honeycomb plate is 5-20 mm. The aluminum alloy keel has high strength, light weight, good decoration and easy processing.

According to the steel structure conversion suspended ceiling, the aluminum honeycomb plate comprises an aluminum honeycomb core layer and aluminum plate layers adhered to two sides of the aluminum honeycomb core layer; the thickness of the aluminum honeycomb core layer is 2-15mm, and the thickness of the aluminum plate layer is 0.5-3 mm; the aluminum alloy keel is 6063-T5 aluminum alloy.

According to the steel structure conversion suspended ceiling, the flange surface of the I-shaped beam clamped by the h-shaped clamp body 11 is provided with the rubber cushion layer 13. The rubber cushion layer is used for avoiding direct contact between the bolt and the I-shaped beam structure and preventing the coating of the bolt from being worn and damaged. The rubber cushion layer can be a rubber cushion, a silica gel cushion, an EVA cushion, a PU cushion or a PVC cushion. The EVA pad is an ethylene-vinyl acetate copolymer pad, the PU pad is a polyurethane pad, and the PVC pad is a polyvinyl chloride pad.

The steel structure conversion suspended ceiling is characterized in that the thickness of the rubber cushion layer 13 is 2-8 mm; the cushion layer 13 is a fireproof cushion.

According to the steel structure conversion suspended ceiling, the fireproof rubber mat is a fireproof silica gel mat or a flame-retardant rubber mat; the thickness of the cushion layer 13 is 4-6 mm.

According to the steel structure conversion suspended ceiling, the h-shaped clamp bodies 11 are arranged in pairs and respectively clamped on two sides of the flange of the I-beam; the C-shaped adaptor 12 is C-shaped steel; the I-shaped beam is I-shaped steel or I-shaped aluminum; and a fireproof coating layer is arranged on the surface of the I-beam. The C-shaped steel is a long steel bar with a C-shaped section, is usually formed by cold bending a hot rolled plate, and has the characteristics of thin steel wall, light dead weight, strength steel and the like. The i-beam is a long steel bar with an i-shaped cross section, i.e. an i-beam made of steel. The I-shaped aluminum is a long-strip aluminum profile with an I-shaped section, and is mainly made of aluminum alloy. The fireproof coating layer can adopt an expansion type fireproof coating or a non-expansion type fireproof coating. The expanding fireproof paint is prepared with natural or artificial polymer as base material, fireproof agent, pigment, stuffing and solvent. When the flame-retardant coating is heated to a temperature higher than a specific temperature, the coating can be foamed and expanded to form a foam-shaped carbon insulating layer, and the flame is isolated from the base layer, so that the base layer is prevented from reaching an ignition temperature and a damage temperature. The non-expansion type fireproof paint is also called thick type fireproof paint, the main component of which is inorganic heat-insulating material, and the non-expansion type fireproof paint does not expand when meeting fire and has good heat-insulating property. The coating utilizes the inherent good heat insulation property of the coating and the heat absorption effect generated by ablation reactions such as evaporation and decomposition of partial components at high temperature to obstruct and consume the transmission of fire heat to the base material, thereby delaying the time for the base layer to reach the destruction temperature.

According to the steel structure conversion suspended ceiling, the C-shaped steel is hot-galvanized C-shaped steel; the I-beam is hot galvanized I-steel; the fireproof coating layer is made of an intumescent acrylic resin fireproof coating; the hinge 125 is a steel hinge. The hot galvanizing C-shaped steel is obtained by immersing the derusted C-shaped steel into molten zinc to make the surface of the C-shaped steel attached with a zinc layer, thereby obtaining the effect of corrosion prevention. The hot-dip galvanized I-steel is also called hot-dip galvanized I-steel or hot-dip galvanized I-steel, and is characterized by that the I-steel after rust-removing is immersed in the molten zinc liquor whose temp. is about 500 deg.C, so that the surface of I-steel is adhered with zinc layer, so that it can obtain the goal of resisting corrosion, and is applicable to strong corrosive environments of various strong acids and alkali fog, etc.

Based on the technical scheme, the steel structure conversion ceiling has the following beneficial effects that:

1. the C-shaped adapter with a specific structure is adopted, the C-shaped flank adapter can be folded as required in the construction process, and the C-shaped flank adapter has better adaptability and good obstacle avoidance performance in an irregular or narrow place, is beneficial to simplifying the assembly manufacturing work and corresponding assembly procedures, is convenient to realize the decoration effect in a complex space, can effectively shorten the construction period, and reduces the construction cost.

2. The ceiling unit provided by the utility model takes the aluminum honeycomb panel as the decorative layer, is light and environment-friendly, and has good performances of heat insulation, sound insulation, fire prevention and the like, so that the ceiling structure obtains good effects of shock absorption, sound absorption, heat insulation and heat preservation, the rapid loss of indoor heat is greatly reduced, and the ceiling unit is especially suitable for indoor decorative spaces with higher requirements on noise or room temperature comfort.

3. The switching unit is simple in structure and clear in fixed relation, the flanges of the I-shaped beams are clamped and fixed by the h-shaped clamping bodies, and the h-shaped clamping bodies in pairs are usually fixed on the C-shaped switching piece oppositely, so that accidents caused by falling of the I-shaped beams are avoided. And the installation is dismantled conveniently in a flexible way, strong adaptability, and reasonable in design can carry out effectual tight screens of clamp to the I-beam.

4. According to the utility model, the rubber cushion layer is arranged between the flange of the I-beam and the h-shaped clamp body, so that the h-shaped clamp body and the bolt can be prevented from directly contacting the I-beam, and a fireproof coating layer or other coatings on the I-beam can be prevented from being abraded or damaged. This cushion layer can select for use fire prevention cushion, for example fire prevention silica gel pad or fire-retardant rubber pad, further promotes this furred ceiling structure's fire behavior.

5. The rubber cushion layer can further extrude and fix the I-shaped beam after being stressed to deform to a certain degree, and meanwhile, the friction force of the rubber cushion prevents the relative sliding between the h-shaped clamp body and the I-shaped beam, so that the clamping and fixing are firmer, and the overall stability and safety of the suspended ceiling are improved.

Drawings

Embodiments of the utility model are described in detail below with reference to the attached drawing figures, wherein:

FIG. 1 shows a schematic cross-sectional structure of a steel structural conversion ceiling of the present invention;

description of reference numerals:

1. a transfer unit; 11. an h-shaped clamp body; 111. a first bolt hole; 112. a first bolt; 113. a first slot; 12. a C-shaped adaptor; 121. a second bolt hole; 122. a second bolt; 123. a C-shaped primary adapter; 124. a C-shaped flank adapter; 125. a hinge; 13. a cushion layer;

2. a ceiling unit; 21. hanging the ribs; 22. a keel layer; 23. and (7) a decorative layer.

Detailed Description

The utility model is further illustrated by the following specific examples, which, however, are to be construed as merely illustrative, and not limitative of the remainder of the disclosure in any way whatsoever. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood as specific cases by those skilled in the art.

An embodiment of the steel structural conversion ceiling of the present invention will be described with reference to fig. 1.

The steel structure conversion suspended ceiling of this embodiment includes switching unit 1 and furred ceiling unit 2.

The adapter unit 1 comprises an h-shaped clamp body 11 and a C-shaped adapter 12.

The h-shaped clip body 11 includes long sides and short sides. The long and short sides together clamp the flanges of the i-beam and their long sides abut the upper flange of the C-adapter 12.

The short side of the h-shaped clamp body 11 is provided with a first bolt hole 111, and a first bolt 112 passes through the first bolt hole 111 and is fastened on the flange of the I-beam. In one embodiment, the flange surface of the i-beam clamped by the h-shaped clamp body 11 is provided with a rubber cushion layer 13, and the end of the first bolt 112 abuts against the rubber cushion layer 13, so that the flange of the i-beam is fastened to the h-shaped clamp body 11. In a preferred embodiment, the rubber pad layer 13 may be a rubber pad, a silicone pad, an EVA pad, a PU pad or a PVC pad, and the thickness of the rubber pad layer 13 may be 2 to 8mm, and may preferably be 4 to 6 mm. In a more preferred embodiment, the rubber cushion layer 13 may be a fireproof rubber cushion, for example, a fireproof silicone rubber cushion or a flame retardant rubber cushion. The long side of the h-shaped clamp body 11 is provided with a first slot hole 113, and the upper wing plate of the C-shaped adaptor 12 is provided with a second bolt hole 121, and a second bolt 122 passes through the first slot hole 113 and the second bolt hole 121 to fix the h-shaped clamp body 11 on the C-shaped adaptor 12. The h-shaped clamps 11 may be disposed in pairs, and respectively clamped at two sides of the flange of the i-beam, so as to be symmetrically fixed to the i-beam.

The underside of the C-adapter 12 is primarily used for attaching and securing associated equipment, equipment or other decorative structures. The C-shaped adaptor 12 comprises a C-shaped main adaptor 123 and a C-shaped wing adaptor 124, wherein the C-shaped wing adaptor 124 is connected to one or both ends of the C-shaped main adaptor 123 by hinges 125. The hinge 125 may be a steel hinge. In one embodiment, the C-shaped adaptor 12 is a C-section steel. In a preferred embodiment, the C-adapter 12 is made of hot-dip galvanized C-section steel.

The I-beam can be I-steel or I-aluminum, and can be preferably I-steel. In one embodiment, the surface of the i-beam is provided with a fire-retardant coating layer, such as an intumescent fire-retardant coating or a non-intumescent fire-retardant coating. In a preferred embodiment, the I-beam is made of hot galvanized I-steel, and the surface of the I-beam is coated with an intumescent acrylic resin fireproof coating.

The ceiling unit 2 includes a suspension rib 21, a keel layer 22, and a decorative layer 23. The hanging ribs 21 are connected to the lower wing plate of the C-shaped adapter 12, a keel layer 22 is fixed on the lower portion of the hanging ribs 21, and a decoration layer 23 is fixed on the lower side of the keel layer 22. In one embodiment, the diameter of the hanging ribs 21 is 5mm-20mm, and the spacing between the hanging ribs 21 is 500 and 1000 mm. In the preferred embodiment, the keel layer 22 includes a main keel connected to the hanger bar 21 and a cross runner connected perpendicularly to the main keel, preferably the main keel and the cross runner may be light gauge steel or aluminum alloy keel, more preferably the aluminum alloy keel is 6063-T5 aluminum alloy. In a more preferred embodiment, the decorative layer 23 may be several aluminum honeycomb panels, preferably, the aluminum honeycomb panels may have a thickness of 5 to 20mm, and more preferably, the aluminum honeycomb panels include an aluminum honeycomb core layer and aluminum plate layers adhered to both sides thereof, wherein the aluminum honeycomb core layer may have a thickness of 2 to 15mm, and the aluminum plate layers may have a thickness of 0.5 to 3 mm.

The main components of the steel structure conversion suspended ceiling can be prefabricated and produced in batches in factories. Those skilled in the art can select an appropriate production flow and installation flow according to the structure of the present invention. As an example, the construction and installation method can comprise the following steps:

(1) prefabricating an h-shaped clamp body, a C-shaped adapter, a main keel, an auxiliary keel, an aluminum honeycomb plate and the like. The relevant sizes of the h-shaped clamp body and the C-shaped adapter can be designed and determined according to the specification of an I-shaped beam used by a building structure. The distance between the long side and the short side of the h-shaped clamp body can be larger than the thickness of the flange of the I-shaped beam, so that the h-shaped clamp body is wider in adaptability. The aluminum honeycomb plate can be determined according to the shape of construction space and specific decoration design requirements, and can be a special-shaped aluminum honeycomb plate, for example.

(2) And (5) mounting the h-shaped clamp body. The H-shaped clamps are respectively installed on two sides of the flange of the I-beam in pairs, the rubber cushion layer is arranged in the H-shaped clamps and wrapped on the surface of the flange of the I-beam, and a first bolt penetrates through a first bolt hole in the short edge of the H-shaped clamps and abuts against the rubber cushion layer, so that the H-shaped clamps and the I-beam are fixed.

(3) And installing the C-shaped adapter. And (3) pressing the upper wing plate of the C-shaped adapter piece close to the long edge of the h-shaped clamp body, and penetrating a second bolt through a first slotted hole in the long edge of the h-shaped clamp body and a second bolt hole in the corresponding position of the upper wing plate of the C-shaped adapter piece by using a second bolt so as to fix the upper wing plate and the h-shaped clamp body with each other. In the actual installation process, if meeting narrow space or barrier, can appropriate angle folding C shape flank adaptor to satisfy the hoist and mount demand in complicated space.

(4) And installing the ceiling unit. And fixing the hanging ribs on the lower wing plates of the C-shaped main adapter and/or the C-shaped flank adapter as required, fixing the main keels and the auxiliary keels at the lower ends of the hanging ribs to form a keel layer, and fixing a plurality of prefabricated aluminum honeycomb plates on the lower side of the keel layer, thereby completing the construction and installation of the steel structure conversion suspended ceiling.

Although the present invention has been described to a certain extent, it is apparent that appropriate changes in the respective conditions may be made without departing from the spirit and scope of the present invention. It will be understood that the embodiments described above are exemplary and non-limiting, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Furthermore, any reference signs in the claims shall not be construed as limiting the claim concerned.

Claims

1. The steel structure conversion suspended ceiling is characterized by comprising a switching unit (1) and a suspended ceiling unit (2); the adapter unit (1) comprises an h-shaped clamp body (11) and a C-shaped adapter piece (12); the h-shaped clamp body (11) comprises a long side and a short side, the long side and the short side clamp the flange of the I-shaped beam together, and the long side of the h-shaped clamp body is abutted against the upper wing plate of the C-shaped adapter (12); a first bolt hole (111) is formed in the short side of the h-shaped clamp body (11), and a first bolt (112) penetrates through the first bolt hole (111) to be fastened on the flange of the I-beam; a first slotted hole (113) is formed in the long side of the h-shaped clamp body (11), a second bolt hole (121) is formed in the upper wing plate of the C-shaped adapter (12), and a second bolt (122) penetrates through the first slotted hole (113) and the second bolt hole (121) to fix the h-shaped clamp body (11) on the C-shaped adapter (12); the C-shaped adaptor (12) comprises a C-shaped main adaptor (123) and a C-shaped flank adaptor (124), wherein the C-shaped flank adaptor (124) is connected to one end or two ends of the C-shaped main adaptor (123) through a hinge (125); the suspended ceiling unit (2) comprises suspended ribs (21), a keel layer (22) and a decorative layer (23); the hanging ribs (21) are connected to the lower wing plate of the C-shaped adapter (12), a keel layer (22) is fixed to the hanging ribs (21), and a decoration layer (23) is fixed to the lower side of the keel layer (22).

2. The steel structure conversion suspended ceiling of claim 1, wherein the diameter of the hanging ribs (21) is 5mm-20mm, and the distance between the hanging ribs (21) is 500 mm and 1000 mm.

3. The steel structural conversion ceiling as claimed in claim 2, wherein the keel layer (22) comprises main keels connected with the hanging ribs (21) and cross-connected cross-runners perpendicular to the main keels; the decorative layer (23) is a plurality of aluminum honeycomb plates.

4. The steel structural conversion ceiling of claim 3, wherein the main runners and cross runners are light gauge steel or aluminum alloy runners; the thickness of the aluminum honeycomb plate is 5-20 mm.

5. The steel structural conversion ceiling of claim 4, wherein the aluminum honeycomb panels comprise an aluminum honeycomb core layer and aluminum panel layers adhered to two sides of the aluminum honeycomb core layer; the thickness of the aluminum honeycomb core layer is 2-15mm, and the thickness of the aluminum plate layer is 0.5-3 mm; the aluminum alloy keel is 6063-T5 aluminum alloy.

6. The steel structure conversion suspended ceiling of any one of claims 1 to 5, wherein the flange surface of the I-beam clamped by the h-shaped clamp body (11) is provided with a rubber cushion layer (13).

7. The steel structural conversion ceiling as claimed in claim 6, wherein the thickness of the rubber mat layer (13) is 2-8 mm; the rubber cushion layer (13) is a fireproof rubber cushion.

8. The steel structural conversion ceiling as claimed in claim 7, wherein the fireproof rubber mat is a fireproof silica gel mat or a flame retardant rubber mat; the thickness of the rubber cushion layer (13) is 4-6 mm.

9. The steel structure conversion suspended ceiling of claim 8, wherein the h-shaped clamp bodies (11) are arranged in pairs and respectively clamped on two sides of the flange of the I-beam; the C-shaped adaptor (12) is C-shaped steel; the I-shaped beam is I-shaped steel or I-shaped aluminum; and a fireproof coating layer is arranged on the surface of the I-beam.

10. The steel structural conversion ceiling of claim 9, wherein the C-section steel is hot-galvanized C-section steel; the I-beam is hot galvanized I-steel; the fireproof coating layer is made of an intumescent acrylic resin fireproof coating; the hinge (125) is a steel hinge.