CN111456310A - Roof structure - Google Patents
Roof structure Download PDFInfo
- Publication number
- CN111456310A CN111456310A CN202010288902.5A CN202010288902A CN111456310A CN 111456310 A CN111456310 A CN 111456310A CN 202010288902 A CN202010288902 A CN 202010288902A CN 111456310 A CN111456310 A CN 111456310A
- Authority
- CN
- China
- Prior art keywords
- wall
- roof
- plate
- purlin
- structure according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 15
- 239000010959 steel Substances 0.000 claims abstract description 15
- 229920000742 Cotton Polymers 0.000 claims abstract description 10
- 238000003466 welding Methods 0.000 claims abstract description 8
- 238000003825 pressing Methods 0.000 claims description 12
- 239000011324 bead Substances 0.000 claims description 2
- 125000006850 spacer group Chemical group 0.000 claims 2
- 238000010276 construction Methods 0.000 abstract description 10
- 238000004321 preservation Methods 0.000 abstract description 7
- 238000009413 insulation Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 238000002955 isolation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000010079 rubber tapping Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 210000003734 kidney Anatomy 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B7/00—Roofs; Roof construction with regard to insulation
- E04B7/02—Roofs; Roof construction with regard to insulation with plane sloping surfaces, e.g. saddle roofs
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
- E04D13/16—Insulating devices or arrangements in so far as the roof covering is concerned, e.g. characterised by the material or composition of the roof insulating material or its integration in the roof structure
- E04D13/1606—Insulation of the roof covering characterised by its integration in the roof structure
- E04D13/1612—Insulation of the roof covering characterised by its integration in the roof structure the roof structure comprising a supporting framework of roof purlins or rafters
- E04D13/1618—Insulation of the roof covering characterised by its integration in the roof structure the roof structure comprising a supporting framework of roof purlins or rafters with means for fixing the insulating material between the roof covering and the upper surface of the roof purlins or rafters
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Roof Covering Using Slabs Or Stiff Sheets (AREA)
Abstract
The invention discloses a roof structure, and belongs to the field of buildings. The device includes: i-steel, the building carrier plate, purlin and roof boarding, the building carrier plate welding is at the top surface of I-steel, the purlin is fixed in the higher authority of building carrier plate, the roof boarding is fixed in the top surface of purlin, it is cotton to have put the heat preservation between building carrier plate and the roof boarding, wherein, the purlin is "second" style of calligraphy structure, two adjacent purlins pass through the connecting plate and link to each other, two continuous roof boarding can the hasp together, the roof boarding passes through the mounting and is fixed in the top surface of purlin, special construction's purlin and roof boarding can realize installing fast through the connecting plate, the efficiency of engineering construction is improved, fill the heat preservation cotton through utilizing the space between building carrier plate and the roof boarding.
Description
Technical Field
The invention relates to the field of buildings, in particular to a roof structure.
Background
Roof structures are various in the field of construction, and as the demand for the speed of infrastructure construction is increased, prefabricated modular buildings are more and more concerned by people.
At present, light steel buildings are used as buildings with higher modularized integration level to gradually enter people's lives, the roof structures are mainly welded by light steel, too many welding processes are slow in construction, the construction safety is poor, the working environment is severe, a welding structure is not easy to remove, when the service life of the buildings is over, the removal basically belongs to destructive, the utilization rate of materials after removal is low, the roof structures formed by welding are additionally filled with heat insulation cotton, the heat insulation cotton is required to be shielded and beautified through a veneer, the efficiency is low, materials are wasted, the construction cost is increased, except for light steel villas, the roof structures of the existing industrial factory buildings cannot provide placement positions for heat insulation materials, only walls are used for heat insulation, most of heat is transmitted from the roof, and severe cold is examined for worker operation and equipment operation in cold places.
In conclusion, the roof structure in the prior art has the problems that the roof structure has low structural installation efficiency and cannot meet the roof heat preservation of an industrial factory building.
Disclosure of Invention
The invention provides a roof structure, which solves the problems that the roof structure in the prior art is low in structural installation efficiency and cannot meet the roof heat preservation requirement of an industrial factory building.
The utility model provides a roof structure, includes I-steel, building carrier plate, purlin and roof boarding, and the building carrier plate welding is at the top surface of I-steel, and the purlin is fixed in the higher authority of building carrier plate, and the roof boarding is fixed in the top surface of purlin, has put between building carrier plate and the roof boarding and has kept warm cotton, its characterized in that: the purlines are of a Z-shaped structure, two adjacent purlines are connected through a connecting plate, two connected roof panels can be buckled together, and the roof panels are fixed on the top surfaces of the purlines through fixing pieces.
Preferably, the purlin comprises continuous molding's first wall, second wall, third wall, fourth wall and fifth wall, and there is the contained angle second wall and horizontal direction, and first wall is the right angle setting with the second wall, and the third wall is vertical setting, and the fourth wall level sets up, and the fourth wall is the right angle setting with the fifth wall, and the third wall just is close to the edge and is equipped with the via hole on length direction, and third wall, fourth wall and fifth wall constitute the kerve in the bottom of purlin.
Preferably, the bottom of the roof panel is a flat plate, the flat plate is provided with a protrusion, the middle of the flat plate is formed with an isolation, the left part of the flat plate is formed with a left lug, the right part of the flat plate is formed with a right lug, the two roof panels are connected with the right lug through a left lug buckle, and a space between the left lug and the right lug forms a drainage area through the isolation.
Preferably, the connecting plate is composed of a sixth wall, a seventh wall, an eighth wall, a ninth wall and a tenth wall which are formed continuously, the connecting plate and the purline are identical in structure, the eighth wall is provided with a waist hole, and the ninth wall is provided with a first fixing hole.
Preferably, the fixing piece is formed from a vertically arranged vertical wall, the top of the vertical wall horizontally extends rightwards to form a transverse wall, the right end of the transverse wall vertically extends downwards to form a main wall, the bottom of the main wall horizontally extends rightwards to form a pressing plate, the pressing plate is provided with a plurality of second fixing holes, the tail end of the pressing plate protrudes upwards to form a turned edge, and the vertical wall, the transverse wall and the main wall form a buckling groove.
Preferably, the connecting plate is arranged between two adjacent purlins, the lower surface of the seventh wall is attached to the upper surface of the second wall, the lower surface of the ninth wall is attached to the upper surface of the fourth wall, and the via hole and the waist hole are coaxially arranged.
Preferably, after the two roof panels are connected, the buckling groove is buckled on the upper surface of the left lug, the lower surface of the pressing plate is attached to the upper surface of the flat plate, and the turned edge is buckled on the protrusion.
Preferably, the width of the kidney hole is greater than the diameter of the via hole.
Preferably, the catching groove and the left lug are in interference fit, and the ninth wall and the bottom groove are in clearance fit.
The invention has the beneficial effects that:
1. the purline of the invention supports between the floor bearing plate and the roof panel to form a space for placing heat insulation cotton, thereby effectively improving the heat insulation effect of the building;
2. because the welding of the edge of the floor bearing plate and the I-steel belongs to full-length welding, the roof plate can be used as a first waterproof layer, and the floor bearing plate can be used as a second waterproof layer, so that the waterproof effect of the building can be effectively enhanced;
3. the flat plate is provided with the bulges, so that the bearing capacity of the flat plate is enhanced, and the serious deformation caused by rainwater impact or external force action during construction in a long-term use process is prevented, in addition, the size of the conventionally used plate is about 2m, the span is slightly large, the isolation is added at the middle part, the strength of the plate can be properly improved, and the service life of the roof plate is effectively prolonged;
4. according to the invention, the roof panels are connected with each other in a mode of the left lug buckle and the right lug, so that the structural form of the roof panels is reduced, and the processing capacity is improved.
5. The connecting plate and the purline have the same structure, so that the purline is enveloped by the connecting plate, and the connection reliability is ensured;
6. the turned edge of the invention is buckled on the bulge, so that the installation reliability of the roof panel is enhanced, and the safety coefficient is improved accordingly.
Drawings
Fig. 1 is a schematic view of a node of a roof structure according to the present invention.
Fig. 2 is an enlarged view of fig. 1 at H.
Fig. 3 is a schematic perspective view of a purlin provided by the present invention.
Fig. 4 is a schematic view of a plane structure of a purlin provided by the invention.
Fig. 5 is a schematic perspective view of a connection plate according to the present invention.
Fig. 6 is a schematic view of a plan structure of the roof panel provided by the present invention.
Fig. 7 is a schematic plan view of a fastener provided in the present invention.
Fig. 8 is a schematic perspective view of the fixing member provided in the present invention.
Fig. 9 is an enlarged view at K in fig. 1.
Fig. 10 is a schematic plan structural view of a roof panel in the second embodiment of the present invention.
Description of reference numerals:
1-I-steel, 2-floor bearing plate, 3-purline, 31-first wall, 32-second wall, 33-third wall, 331-via hole, 34-fourth wall, 35-fifth wall, 36-bottom groove, 4-heat preservation cotton, 5-roof panel, 51-flat plate, 511-bulge, 52-isolation, 53-left ear, 54-right ear, 55-drainage area, 6-connecting plate, 61-sixth wall, 62-seventh wall, 63-eighth wall, 631-waist hole, 64-ninth wall, 641-first fixing hole, 65-tenth wall, 7-fixing piece, 71-vertical wall, 72-transverse wall, 73-main wall, 74-pressing plate, 741-second fixing hole, 75-curled edge and 76-catching groove.
Detailed Description
An embodiment of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the embodiment.
The first embodiment is as follows:
as shown in fig. 1 and 2, a roof structure provided in an embodiment of the present invention includes an i-steel 1, a floor bearing plate 2, a purlin 3, and a roof panel 5, the floor bearing plate 2 is welded on a top surface of the i-steel 1, the purlin 3 is fixed on the floor bearing plate 2, the roof panel 5 is fixed on a top surface of the purlin 3, and heat insulation cotton 4 is placed between the floor bearing plate 2 and the roof panel 5, which is characterized in that: the purlines 3 are of a Z-shaped structure, two adjacent purlines 3 are connected through a connecting plate 6, two connected roof panels 5 can be buckled together, and the roof panels 5 are fixed on the top surfaces of the purlines 3 through fixing pieces 7.
In the structure, the purlines 3 are supported between the floor bearing plates 2 and the roof plates 5 to form a space for placing the heat-preservation cotton 4, so that the heat-preservation effect of a building can be effectively improved, the edges of the floor bearing plates 2 and the I-steel 1 are welded fully, the roof plates 5 can serve as a first waterproof layer, and the floor bearing plates 2 serve as a second waterproof layer to strengthen the waterproof effect.
As shown in fig. 3 and 4, the purlin 3 is composed of a first wall 31, a second wall 32, a third wall 33, a fourth wall 34 and a fifth wall 35 which are continuously formed, the second wall 32 forms an included angle with the horizontal direction, the first wall 31 and the second wall 32 are arranged at a right angle, the third wall 33 is vertically arranged, the fourth wall 34 is horizontally arranged, the fourth wall 34 and the fifth wall 35 are arranged at a right angle, the third wall 33 is provided with a through hole 331 near the edge in the length direction, and the third wall 33, the fourth wall 34 and the fifth wall 35 form a bottom groove 36 at the bottom of the purlin 3.
In the above structure, the angle between the second wall 32 and the horizontal direction is consistent with the requirement of the roof drainage slope where the building is located, so that the roof panel 5 can meet the drainage requirement.
As shown in fig. 6, the bottom of the roof panels 5 is a flat plate 51, the flat plate 51 is provided with a protrusion 511, the middle of the flat plate 51 is formed with a partition 52, the left part of the flat plate 51 is formed with a left ear 53, the right part of the flat plate 51 is formed with a right ear 54, two roof panels 5 are buckled on the right ear 54 through the left ear 53, and a drainage area 55 is formed in the space between the left ear 53 and the right ear 54 through the partition 52.
In the above structure, the flat plate 51 is provided with the protrusions 511, so that the bearing capacity of the flat plate is enhanced, the serious deformation caused by rainwater impact or external force of construction in a long-term use process is prevented, the size of a conventionally used plate is about 2m, the span is slightly large, the isolation 52 is added at the middle part, the strength of the roof plate 5 can be properly improved, and the service life of the roof plate 5 is effectively prolonged.
In the structure, the roof panels are connected with each other by the left lug 53 and the right lug 54, so that the connecting structure of the two roof panels 5 is reduced, the processing capacity is improved, and quick installation is realized.
As shown in fig. 5, the connecting plate 6 is composed of a sixth wall 61, a seventh wall 62, an eighth wall 63, a ninth wall 64 and a tenth wall 65 which are continuously molded, the connecting plate 6 has the same structure as the purlin 3, the eighth wall 63 is provided with a waist hole 631, and the ninth wall 64 is provided with a first fixing hole 641.
In the structure, purlins 3 can be fixed on I-steel 1 in a self-tapping screw mode in site construction, the first fixing holes 641 are used for positioning, similarly, roof panels 5 are fixed on the purlins 3 in a self-tapping screw mode, and the second fixing holes 741 are used for positioning.
As shown in fig. 7 and 8, the fixing member 7 is formed by starting from a vertical wall 71 which is vertically arranged, the top of the vertical wall 71 horizontally extends rightwards to form a transverse wall 72, the right end of the transverse wall 72 vertically extends downwards to form a main wall 73, the bottom of the main wall 73 horizontally extends rightwards to form a pressing plate 74, a plurality of fixing holes 741 are arranged on the pressing plate 74, the tail end of the pressing plate 74 protrudes upwards to form a curled edge 75, and the vertical wall 71, the transverse wall 72 and the main wall 73 form a buckling groove 76.
As shown in fig. 1, 3, 4 and 5, the connecting plate 6 is placed between two adjacent purlins 3, the lower surface of the seventh wall 62 is attached to the upper surface of the second wall 32, the lower surface of the ninth wall 64 is attached to the upper surface of the fourth wall 34, and the through hole 331 is coaxially arranged with the kidney hole 631.
In the structure, the width of the waist hole 631 is larger than the diameter of the via hole 331, so that the bolts for field construction can easily pass through the waist hole 631 and the via hole 331 to realize the connection of the connecting plate 6 and the purline 3, and the connecting plate 6 has the same structure and different size with the purline 3, so that the enveloping of the connecting plate 6 on the purline 3 is realized, and the connection reliability of the connecting plate and the purline is ensured.
As shown in fig. 2, 6, 7 and 9, when two roof panels 5 are connected, the fastening groove 76 is fastened to the upper surface of the left ear 53, the lower surface of the pressing plate 74 is attached to the upper surface of the flat plate 51, and the bead 75 is fastened to the protrusion 511.
In the structure, be interference fit between catching groove 76 and the left ear 53, there is not other fixed form here, adopt interference fit, form the extrusion state, guarantee here to connect and do not appear loose state, be clearance fit between ninth wall 64 and the kerve 36, here because there is self tapping nail to connect, so at first consider to place ninth wall 64 in kerve 36 fast, so set up to clearance fit, satisfy quick installation, in addition, can place the cushion between the lower surface of clamp plate 74 and the upper surface of dull and stereotyped 51 and seal, play better waterproof effect.
In this embodiment, consider that ordinary bending shaping is inefficient, or stamping forming die is with high costs, the shaping of roof boarding 5 can preferentially adopt roll forming, realizes the shaping through small-size roll forming die, and lifting efficiency practices thrift the cost.
Example two:
on the basis of the first embodiment, as shown in fig. 10, the left lug 53 and the right lug 54 may be set to be circular arc-shaped rolling forms to realize that the two roof panels 5 are connected with each other, the rolling forms may uniformly distribute the enveloping force between the left lug 53 and the right lug 54, so as to avoid layout stress, and prolong the service life of the roof panels 5, and correspondingly, the structure of the fixing member 7 at this position should also be set to be a rolling structure.
The above disclosure is only for a few specific embodiments of the present invention, however, the present invention is not limited to the above embodiments, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.
Claims (9)
1. The utility model provides a roof structure, includes I-steel (1), building carrier plate (2), purlin (3) and roof boarding (5), the welding of building carrier plate (2) is in the top surface of I-steel (1), purlin (3) are fixed in the higher authority of building carrier plate (2), roof boarding (5) are fixed in the top surface of purlin (3), building carrier plate (2) with place between roof boarding (5) keep warm cotton (4), its characterized in that: the purlines (3) are of a Z-shaped structure, two adjacent purlines (3) are connected through a connecting plate (6), two connected roof panels (5) can be buckled together, and the roof panels (5) are fixed on the top surfaces of the purlines (3) through fixing pieces (7).
2. A roof structure according to claim 1, characterized in that the purlin (3) is formed by a first wall (31), a second wall (32), a third wall (33), a fourth wall (34) and a fifth wall (35) which are formed continuously, the second wall (32) forms an angle with the horizontal direction, the first wall (31) and the second wall (32) are arranged at right angles, the third wall (33) is arranged vertically, the fourth wall (34) is arranged horizontally, the fourth wall (34) and the fifth wall (35) are arranged at right angles, the third wall (33) is provided with through holes (331) at the edges in the length direction, and the third wall (33), the fourth wall (34) and the fifth wall (35) form a bottom groove (36) at the bottom of the purlin (3).
3. A roof structure according to claim 1, characterized in that the bottom of the roof panels (5) is a flat plate (51), that the flat plate (51) is provided with protrusions (511), that the middle of the flat plate (51) is formed with a spacer (52), that the left part of the flat plate (51) is formed with a left ear (53), that the right part of the flat plate (51) is formed with a right ear (54), that two roof panels (5) are connected to the right ear (54) by means of the left ear (53), and that the space between the left ear (53) and the right ear (54) forms a drainage area (55) by means of the spacer (52).
4. A roof structure according to claim 1, characterized in that the connecting plate (6) is formed by a sixth wall (61), a seventh wall (62), an eighth wall (63), a ninth wall (64) and a tenth wall (65) which are formed continuously, the connecting plate (6) has the same structure as the purlins (3), the eighth wall (63) is provided with a waist hole (631), and the ninth wall (64) is provided with a first fixing hole (641).
5. A roof structure according to claim 1, characterized in that the fixing member (7) is formed by starting from a vertical wall (71) which is vertically arranged, the top of the vertical wall (71) horizontally extends to the right to form a transverse wall (72), the right end of the transverse wall (72) vertically extends downwards to form a main wall (73), the bottom of the main wall (73) horizontally extends to the right to form a pressing plate (74), a plurality of fixing holes two (741) are arranged on the pressing plate (74), the end of the pressing plate (74) protrudes upwards to form a curled edge (75), and the vertical wall (71), the transverse wall (72) and the main wall (73) form a catching groove (76).
6. A roof structure according to claim 1, characterized in that said connecting plate (6) is interposed between two adjacent purlins (3), the lower surface of said seventh wall (62) abutting the upper surface of said second wall (32), the lower surface of said ninth wall (64) abutting the upper surface of said fourth wall (34), said through hole (331) being coaxial with said waist hole (631).
7. A roof structure according to claim 5, characterized in that after connection of two roof panels (5), the fastening groove (76) is fastened to the upper surface of the left ear (53), the lower surface of the pressure plate (74) abuts the upper surface of the flat plate (51), and the bead (75) is fastened to the protrusion (511).
8. A roof structure according to claim 7, characterized in that the width of the waist aperture (631) is larger than the diameter of the via hole (331).
9. A roof structure according to claim 8, characterized in that the snap groove (76) is an interference fit with the left ear (53) and the ninth wall (64) is a clearance fit with the bottom groove (36).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010288902.5A CN111456310A (en) | 2020-04-14 | 2020-04-14 | Roof structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010288902.5A CN111456310A (en) | 2020-04-14 | 2020-04-14 | Roof structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111456310A true CN111456310A (en) | 2020-07-28 |
Family
ID=71677658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010288902.5A Pending CN111456310A (en) | 2020-04-14 | 2020-04-14 | Roof structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111456310A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201148697Y (en) * | 2007-11-27 | 2008-11-12 | 苏州枫津塑胶有限责任公司 | Novel trapezoid peak wave board |
| CN201981682U (en) * | 2011-02-21 | 2011-09-21 | 汪东方 | Interior gutter panel point mechanism for steel structure |
| CN204152090U (en) * | 2014-10-14 | 2015-02-11 | 沈阳三新实业有限公司 | A kind of pre-perforated metal roof panel and Roof system application thereof |
| JP2017025513A (en) * | 2015-07-17 | 2017-02-02 | 株式会社サワタ | Suspension device for ceiling joist retainer |
| CN107989276A (en) * | 2017-11-27 | 2018-05-04 | 百安力钢结构应用科技有限公司 | Metal roofing board and metal Roof system |
| CN108868016A (en) * | 2017-05-16 | 2018-11-23 | 刘令 | The production method of the broken heat-insulating granules cotton roofing of recycled for multiple times |
| CN208416034U (en) * | 2018-06-15 | 2019-01-22 | 台山市华强钢结构工程有限公司 | A kind of steel-structure factory building and its roof structure |
| CN209040437U (en) * | 2018-07-18 | 2019-06-28 | 深圳赤晓工程建设有限公司 | A kind of angle is speeded type metal single layer roof boarding |
-
2020
- 2020-04-14 CN CN202010288902.5A patent/CN111456310A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201148697Y (en) * | 2007-11-27 | 2008-11-12 | 苏州枫津塑胶有限责任公司 | Novel trapezoid peak wave board |
| CN201981682U (en) * | 2011-02-21 | 2011-09-21 | 汪东方 | Interior gutter panel point mechanism for steel structure |
| CN204152090U (en) * | 2014-10-14 | 2015-02-11 | 沈阳三新实业有限公司 | A kind of pre-perforated metal roof panel and Roof system application thereof |
| JP2017025513A (en) * | 2015-07-17 | 2017-02-02 | 株式会社サワタ | Suspension device for ceiling joist retainer |
| CN108868016A (en) * | 2017-05-16 | 2018-11-23 | 刘令 | The production method of the broken heat-insulating granules cotton roofing of recycled for multiple times |
| CN107989276A (en) * | 2017-11-27 | 2018-05-04 | 百安力钢结构应用科技有限公司 | Metal roofing board and metal Roof system |
| CN208416034U (en) * | 2018-06-15 | 2019-01-22 | 台山市华强钢结构工程有限公司 | A kind of steel-structure factory building and its roof structure |
| CN209040437U (en) * | 2018-07-18 | 2019-06-28 | 深圳赤晓工程建设有限公司 | A kind of angle is speeded type metal single layer roof boarding |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200728 |
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| RJ01 | Rejection of invention patent application after publication |