CA1290955C - Steel soldier - Google Patents
Steel soldierInfo
- Publication number
- CA1290955C CA1290955C CA 526144 CA526144A CA1290955C CA 1290955 C CA1290955 C CA 1290955C CA 526144 CA526144 CA 526144 CA 526144 A CA526144 A CA 526144A CA 1290955 C CA1290955 C CA 1290955C
- Authority
- CA
- Canada
- Prior art keywords
- soldier
- flanges
- steel
- openings
- web
- 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.)
- Expired - Fee Related
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 13
- 239000010959 steel Substances 0.000 title claims abstract description 13
- 230000002093 peripheral effect Effects 0.000 claims abstract description 5
- 238000005336 cracking Methods 0.000 abstract description 2
- 238000009415 formwork Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G25/00—Shores or struts; Chocks
- E04G25/02—Shores or struts; Chocks non-telescopic
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
- E04G11/48—Supporting structures for shutterings or frames for floors or roofs
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
- Roof Covering Using Slabs Or Stiff Sheets (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
ABSTRACT
A steel soldier for supporting concrete formwork comprises a pair of steel channels connected back to back and parallel with one another by tie plates Each channel has a web which. in order to increase its strength, is formed at longitudinally spaced intervals with flanged openings . These openings characteristically according to the invention have peripheral flanges which are of channel-shaped radial profile, thereby increasing the shear carrying capacity and reducing the risk of cracking of the soldier under load.
A steel soldier for supporting concrete formwork comprises a pair of steel channels connected back to back and parallel with one another by tie plates Each channel has a web which. in order to increase its strength, is formed at longitudinally spaced intervals with flanged openings . These openings characteristically according to the invention have peripheral flanges which are of channel-shaped radial profile, thereby increasing the shear carrying capacity and reducing the risk of cracking of the soldier under load.
Description
~:90~955 M~C FOLIO: 230P50980 WANGDOC: 0268L
"IMPROVED STEEL SOLDIER"
This invention relates to an improved steel soldier for supporting conccete formwoek and represents an improvement or modification of the steel soldiers which have been disclosed in British Patent Specifications 1551154 and 2145145.
Those soldiers are of a kind which comprise a pair of steel channels connected back to back and parallel with one another. Each channel has a web portion which.
in order to increase its strength is formed at longitudinally spaced intervals with openings - usually circular - which are formed at their peripheries with lies otherwise known, and hereinafter referred to, as flanges. Further the flanges of the eespective web portions may be flared in opposite directions.
The flanges commonly project at 90 from the web portions but it is found that when the openings are swaged around their peripheries to form such flanges there is a tendency for the burred edge of the opening to crack or to be subjected to considerable tensile strain sufficiene to result in cracking when the soldier is subsequently under load.
~. X9~)9~
The present invention has been devised with the general object of providing a soldier which is free of these tendencies and has an increased shear carrying capacity.
In accordance with the invention there is provided a steel soldier comprising a pair of elongate beam elements connected back-to-back and parallel with each other, each of said element having a web which has openings spaced along its length, said openings having peripheral lips or flanges wherein said lips or flanges are of channel-shaped radial lo profile. Further and preferably the flanges of the respective web portions face in opposite directions and project from the outward facing sides of the web portions.
These modifications have the effect of transferring any burred edge to an area which in use is subjected to less strain and as a consequence any potential cracks in the burred edge are less harmful.
The invention is hereafter described in more detail by reference to the accompanying drawings in which:
Fig. 1 is a side elevation of the improved soldier;
Fig. 2 is a cross-section on line X-X of Fig. l;
Fig. 3 is a cross-section on line Y-Y of Fig. l;
Fig. 4 is an end elevation of the soldier shown in Figs. 1 to 3;
Fig. 5(a) and (b) are enlarged scale detail views of new and old peripheral flange profiles; and Fig. 6 is a diagram to illustrate the effect of the newly proposed flange profile.
"IMPROVED STEEL SOLDIER"
This invention relates to an improved steel soldier for supporting conccete formwoek and represents an improvement or modification of the steel soldiers which have been disclosed in British Patent Specifications 1551154 and 2145145.
Those soldiers are of a kind which comprise a pair of steel channels connected back to back and parallel with one another. Each channel has a web portion which.
in order to increase its strength is formed at longitudinally spaced intervals with openings - usually circular - which are formed at their peripheries with lies otherwise known, and hereinafter referred to, as flanges. Further the flanges of the eespective web portions may be flared in opposite directions.
The flanges commonly project at 90 from the web portions but it is found that when the openings are swaged around their peripheries to form such flanges there is a tendency for the burred edge of the opening to crack or to be subjected to considerable tensile strain sufficiene to result in cracking when the soldier is subsequently under load.
~. X9~)9~
The present invention has been devised with the general object of providing a soldier which is free of these tendencies and has an increased shear carrying capacity.
In accordance with the invention there is provided a steel soldier comprising a pair of elongate beam elements connected back-to-back and parallel with each other, each of said element having a web which has openings spaced along its length, said openings having peripheral lips or flanges wherein said lips or flanges are of channel-shaped radial lo profile. Further and preferably the flanges of the respective web portions face in opposite directions and project from the outward facing sides of the web portions.
These modifications have the effect of transferring any burred edge to an area which in use is subjected to less strain and as a consequence any potential cracks in the burred edge are less harmful.
The invention is hereafter described in more detail by reference to the accompanying drawings in which:
Fig. 1 is a side elevation of the improved soldier;
Fig. 2 is a cross-section on line X-X of Fig. l;
Fig. 3 is a cross-section on line Y-Y of Fig. l;
Fig. 4 is an end elevation of the soldier shown in Figs. 1 to 3;
Fig. 5(a) and (b) are enlarged scale detail views of new and old peripheral flange profiles; and Fig. 6 is a diagram to illustrate the effect of the newly proposed flange profile.
l x90~35r-1 Referring firstly to Figs. 1 to 4 the soldier therein shown comprises a pair of beam elements each comprising a folded steel plate having a flat web 1 formed with circular openings la along its length.
Three such openings are shown although there may be more depending upon ~he overall length of the soldier. The web 1 is laterally extended so as to enter and give support to a pair of hollow profile chord plates 2 of somewhat channel-shaped configuration which are attached to the web by welding at locations a and b along the web edge and one web face. The complete soldier is comprised of two beam elements as above described mounted in parallel opposite facing spaced relation and connected at top and bottom by rectangular tie plates 3.
Hitherto, as shown in Fig. 5b the openings la in the web portions have been formed at their peripheries with lips or flanges lb which have a simple arcuate profile but in accordance with the invention the peripheral portions of the openings are formed with lips or flanges lc of U-shaped profile as shown in Figs. 3 and 5(a).
In each of Figs. S(a) and 5(b) the positions of pcobable punching burr ccacks are indicated by arcows A
whilst the dashed lines indicate the mode of elastic settlement of the newly devised flanges lc and the pcevious flanges lb under the same applied load P2.
1 ~5'0~5 .
In Fig. 5(a) el represents the lateral distance between the planes of the points of application of the load P2 whilst in Fig. 5(b) e2 ~epresents the equivalent distance for the previously used arcuate flange configuration.
From Figs. 5a and 5b it should readily be understandable that under resilient settlement the value of e2 increases to a greater extent that that of el with the same loading. This causes lack of dispersal of load around the flanged hole resulting in premature failure at the initial loading point. Otherwise expressed, because f ibre stresses are proportional to el and e2 it is therefore desirable to utilise a configuration which results in el having a minimum value.
Fig. 6 diagramatically represents the distribution of loads in the region of a web opening la of the ,improved soldier when a bearing tube is supported therein and sheds a load in the direction indicated by arrows P. Due to the lesser value of el compared to e2 the channel shaped flange profile acts more as a hoop. This enables components Rc f reaction R, R, to be carried within the circumference of the flange section, thus reducing the stress intensity.
Three such openings are shown although there may be more depending upon ~he overall length of the soldier. The web 1 is laterally extended so as to enter and give support to a pair of hollow profile chord plates 2 of somewhat channel-shaped configuration which are attached to the web by welding at locations a and b along the web edge and one web face. The complete soldier is comprised of two beam elements as above described mounted in parallel opposite facing spaced relation and connected at top and bottom by rectangular tie plates 3.
Hitherto, as shown in Fig. 5b the openings la in the web portions have been formed at their peripheries with lips or flanges lb which have a simple arcuate profile but in accordance with the invention the peripheral portions of the openings are formed with lips or flanges lc of U-shaped profile as shown in Figs. 3 and 5(a).
In each of Figs. S(a) and 5(b) the positions of pcobable punching burr ccacks are indicated by arcows A
whilst the dashed lines indicate the mode of elastic settlement of the newly devised flanges lc and the pcevious flanges lb under the same applied load P2.
1 ~5'0~5 .
In Fig. 5(a) el represents the lateral distance between the planes of the points of application of the load P2 whilst in Fig. 5(b) e2 ~epresents the equivalent distance for the previously used arcuate flange configuration.
From Figs. 5a and 5b it should readily be understandable that under resilient settlement the value of e2 increases to a greater extent that that of el with the same loading. This causes lack of dispersal of load around the flanged hole resulting in premature failure at the initial loading point. Otherwise expressed, because f ibre stresses are proportional to el and e2 it is therefore desirable to utilise a configuration which results in el having a minimum value.
Fig. 6 diagramatically represents the distribution of loads in the region of a web opening la of the ,improved soldier when a bearing tube is supported therein and sheds a load in the direction indicated by arrows P. Due to the lesser value of el compared to e2 the channel shaped flange profile acts more as a hoop. This enables components Rc f reaction R, R, to be carried within the circumference of the flange section, thus reducing the stress intensity.
Claims (4)
1. A steel soldier comprising a pair of elongate beam elements connected back-to-back and parallel with each other, each of said element having a web which has openings spaced along its length, said openings having peripheral lips or flanges wherein said lips or flanges are of channel-shaped radial profile.
2. A steel soldier according to claim 1, wherein said lips or flanges of the respective webs face in mutually opposite directions.
3. A steel soldier according to claim 2, wherein the channels formed by said lips or flanges (1c) face towards each other.
4. A steel soldier according to claim 1, 2, or 3, wherein said elongate beam elements are of channel section.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8531751 | 1985-12-24 | ||
| GB08531751A GB2184478B (en) | 1985-12-24 | 1985-12-24 | Improved steel soldier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1290955C true CA1290955C (en) | 1991-10-22 |
Family
ID=10590252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 526144 Expired - Fee Related CA1290955C (en) | 1985-12-24 | 1986-12-23 | Steel soldier |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0227314B1 (en) |
| CA (1) | CA1290955C (en) |
| GB (1) | GB2184478B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0468108A1 (en) * | 1990-07-23 | 1992-01-29 | Mabey Hire Limited | Improved steel soldier for concrete formwork |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2046459A1 (en) * | 1970-09-21 | 1972-04-13 | Haushalter, Dietmar, 5804 Herdecke | Beams for formwork, falsework and the like |
| AU477444B2 (en) * | 1972-08-16 | 1974-10-03 | G. J. HOLDINGS PTY. LTD. and ROEBUCK DEVELOPMENTS PTY. LTD | Improved truss |
| GB1551154A (en) * | 1976-11-12 | 1979-08-22 | Beachley Machinery | Soldiers for concrete formwork |
| GB1603516A (en) * | 1978-05-25 | 1981-11-25 | Rayid Metal Dev Ltd | Formwork soldier |
| GB2145145B (en) * | 1983-08-19 | 1986-09-24 | Mabey Hire Co | Steel formwork soldier |
-
1985
- 1985-12-24 GB GB08531751A patent/GB2184478B/en not_active Expired
-
1986
- 1986-11-25 EP EP19860309200 patent/EP0227314B1/en not_active Expired
- 1986-12-23 CA CA 526144 patent/CA1290955C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| GB2184478A (en) | 1987-06-24 |
| EP0227314A2 (en) | 1987-07-01 |
| GB2184478B (en) | 1988-12-14 |
| GB8531751D0 (en) | 1986-02-05 |
| EP0227314B1 (en) | 1990-05-16 |
| EP0227314A3 (en) | 1988-03-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |