EP0005418A2 - Load transmitting fastening elements for gratings - Google Patents
Load transmitting fastening elements for gratings Download PDFInfo
- Publication number
- EP0005418A2 EP0005418A2 EP79850038A EP79850038A EP0005418A2 EP 0005418 A2 EP0005418 A2 EP 0005418A2 EP 79850038 A EP79850038 A EP 79850038A EP 79850038 A EP79850038 A EP 79850038A EP 0005418 A2 EP0005418 A2 EP 0005418A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- fastening element
- steel members
- gratings
- edge steel
- flange
- 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.)
- Granted
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
- E04C2/42—Gratings; Grid-like panels
- E04C2/428—Separate connecting means, e.g. connecting gratings to underlying structure
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Sewage (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
- Clamps And Clips (AREA)
- Connection Of Plates (AREA)
- Floor Finish (AREA)
Abstract
Description
- When walkways or other supporting surfaces are formed with the aid of gratings which are placed in juxtaposition between two seatings, there may arise some difference in level between two freely juxtaposed gratings if one of the gratings is subjected to load or if both gratings are subjected to loads of different sizes. With large span widths and with gratings of insufficient strength the difference in level between the gratings may be particularly noticeable by and risky to pedestrians trafficking the walkways. It has therefore been found necessary to unite the juxtaposed gratings in some way or other. Usually, this has been done by screwing together the gratings before the laying thereof, or by connecting them together in some other manner with the aid of fastening elements, e.g. according to the published Swedish patent application 7403682-3. The prior-art connecting methods and fastening elements have, however, been troublesome in use and have often made it necessary to mount the fastening elements before the laying of the gratings, or to insert the fastening elements from below.
- The present invention has for its object to provide a simple fastening element which after the laying of the gratings can be mounted in a simple manner without making it necessary to lift the gratings in relation to each other or to insert the fastening element from below.
- To this end, the fastening element is substantially of I-shape having upper and lower flanges and a web between the flanges, which is adapted to extend downwards between the edge steel members of two juxtaposed gratings and which is of substantially the same length as the height of the edge steel members at right angles to the plane of the gratings, the lower flange of the fastening element being formed as a supporting surface for supporting the edge steel members of the gratings, while the upper flange of the fastening element has holding lugs which are bent out of a flange side face in one direction longitudinally of the edge steel members, and which, after the mounting of the fastening element under downward bending of said side face of the upper flange into engagement with the upper edges of the edge steel members, are adapted to project downwardly outside the remote side faces of the two edge steel members.
- The invention will be described in greater detail hereinbelow with reference to the accompanying drawing in which:
- Fig. 1 shows a fastening element according to the invention, as seen from one large side;
- Fig. 2 is a view taken on the line II-II in Fig. 1;
- Fig. 3 is a view taken on the line III-III in Fig. 1;
- Fig. 4 is a section of two juxtaposed gratings which have been united by means of a fastening element according to the invention;
- Fig. 5 is a section taken on the line V-V in Fig. 4;
- Fig. 6 is a plan view taken on the line VI-VI in Fig. 4.
- Fig. 4 shows two
gratings steel members transverse rods 14 spaced suitable distances apart along the upper sides of the supportingsteel members steel members 13 will hereinafter be designated "edge steel members". The supportingsteel members 12 and theedge steel members 13 rest freely on seatings (not shown). Between the seatings the gratings can therefore move vertically in relation to each other if the gratings are loaded differently much or if only one of the gratings is subjected to load. Thus, if thegrating 11 is loaded in the direction of the arrow 15 the grating, if no special measures were taken, would sink a rather considerable distance down below the level of thegrating 10, particularly if the gratings have been given too slender dimensions or have large free span widths. These movements between the juxtaposedgratings - Figs. 1-3 show an embodiment of a
fastening element 16 according to the invention. In this instance, the fastening element is punched from a flat piece of sheet metal approximately into I-shape having upper and lower bars orflanges web 19 therebetween. Theupper flange 18 of the fastening element besides has outwardly bent holdinglugs 20 which have been bent at right angles in one direction from the flat piece of sheet metal. - The
lower flange 17 has upper supportingedge surfaces 21 on which theedge steel members 13 of the juxtaposedgratings edge surfaces 22 of theupper flange 18, which face the supportingedge surfaces 21, are cut obliquely outwardly and upwardly at an angle of say 15° to a normal of theweb 19. In the embodiment illustrated thelower flange 17 has been given a larger height than the thickness of the piece of sheet metal so that thelower flange 17 can fulfill its task of a supporting cross beam in a better way. - The distance between the lower and
upper flanges web 19, is so adapted to the height of theedge steel members 13 that said steel members will be retained between thelower flange 17 and theupper flange 18 after the latter has been bent down, in connection with the mounting, into the position shown in Figs. 4-6, where the holding lugs project downwardly on either side of theedge steel members 13, thereby fixing the fastening element in position and preventing rotation of said element. - The fastening element according to the invention is preferably manufactured from stainless steel instead of ordinary hot-galvanized steel since the zinc layer of a hot-galvanized fastening element might crack, with resulting corrosion of the fastening element. The fastening element is manufactured in different sizes with regard to the heights of the supporting steel members and edge steel members of the gratings.
- Mounting of the fastening element can be realized after the gratings have already been brought into position. It is not necessary to raise the gratings, and neither need the fastening element be inserted in position from below. For mounting, use is made of a screw driver to bend apart the
edge steel members 13 of thegratings edge steel members 13, thelower flange 17 being parallel with theedge steel members 13. After the fastening element has been moved a sufficient distance downwards, the element is turned so that thelower flange 17 will extend transversely of the longitudinal direction of theedge steel members 13. Then the upwardly projectingupper flange 18 is hammered down into the position shown in Figs. 4-6. When the upper flange is hammered down in this way use can be made of a screw driver to keep the fastening element in the correct position, with thelower flange 17 directed transversely of theedge steel members 13. If the fastening element is retained in this way the play between the fastening element and theedge steel members 13 will besides be the smallest possible. The fastening elements can be mounted spaced 3 to 4 dm apart, and normally use can be made of two to four fastening elements per length of grating, depending upon the span width and the permissible load. - The
sloping surfaces 22 at the lower edge of theupper flange 18 facilitate turning thefastening element 16 during mounting since thesurfaces 22 owing to their obliquity will function as guiding cam surfaces. - When the fastening elements according to the invention are to be dismounted the downwardly bent
upper flange 18 is first bent up with the aid of a screw driver into upright position and then the fastening element is rotated through a quarter of a turn with the aid of a pair of tongs or other tool so that thelower flange 17 of the fastening element can be withdrawn from between the twoedge steel members 13.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT79850038T ATE140T1 (en) | 1978-05-03 | 1979-05-02 | LOAD TRANSFERRING FASTENING ELEMENT FOR GRILLING. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE7805099 | 1978-05-03 | ||
SE7805099A SE406345B (en) | 1978-05-03 | 1978-05-03 | FASTENERS FOR LOAD TRANSFER BETWEEN GALLER FLOORS |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0005418A2 true EP0005418A2 (en) | 1979-11-14 |
EP0005418A3 EP0005418A3 (en) | 1979-11-28 |
EP0005418B1 EP0005418B1 (en) | 1981-08-05 |
Family
ID=20334832
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP79850038A Expired EP0005418B1 (en) | 1978-05-03 | 1979-05-02 | Load transmitting fastening elements for gratings |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0005418B1 (en) |
AT (1) | ATE140T1 (en) |
DE (1) | DE2960560D1 (en) |
SE (1) | SE406345B (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3640173A (en) * | 1969-09-18 | 1972-02-08 | Curt G Muller | Fastener means |
GB1412453A (en) * | 1972-03-07 | 1975-11-05 | Mentis A | Load bearing platforms |
GB1473816A (en) * | 1974-03-19 | 1977-05-18 | Haefla Bruks Ab | Fastening bracket |
-
1978
- 1978-05-03 SE SE7805099A patent/SE406345B/en not_active IP Right Cessation
-
1979
- 1979-05-02 EP EP79850038A patent/EP0005418B1/en not_active Expired
- 1979-05-02 DE DE7979850038T patent/DE2960560D1/en not_active Expired
- 1979-05-02 AT AT79850038T patent/ATE140T1/en not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3640173A (en) * | 1969-09-18 | 1972-02-08 | Curt G Muller | Fastener means |
GB1412453A (en) * | 1972-03-07 | 1975-11-05 | Mentis A | Load bearing platforms |
GB1473816A (en) * | 1974-03-19 | 1977-05-18 | Haefla Bruks Ab | Fastening bracket |
Also Published As
Publication number | Publication date |
---|---|
ATE140T1 (en) | 1981-08-15 |
DE2960560D1 (en) | 1981-11-05 |
EP0005418B1 (en) | 1981-08-05 |
SE406345B (en) | 1979-02-05 |
EP0005418A3 (en) | 1979-11-28 |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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