CA1064725A - Sectional bar usable as a concrete surface casting ruler - Google Patents
Sectional bar usable as a concrete surface casting rulerInfo
- Publication number
- CA1064725A CA1064725A CA236,420A CA236420A CA1064725A CA 1064725 A CA1064725 A CA 1064725A CA 236420 A CA236420 A CA 236420A CA 1064725 A CA1064725 A CA 1064725A
- Authority
- CA
- Canada
- Prior art keywords
- sectional
- sectional member
- casting
- concrete
- member 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.)
- Expired
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/02—Arrangement or construction of joints; Methods of making joints; Packing for joints
- E01C11/04—Arrangement or construction of joints; Methods of making joints; Packing for joints for cement concrete paving
- E01C11/10—Packing of plastic or elastic materials, e.g. wood, resin
- E01C11/106—Joints with only prefabricated packing; Packings therefor
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A light-weight elongated sectional member usable as a ruler for casting concrete surfaces or the like on the ground and comprising an upper portion forming a ridge and extending sub-stantially the complete length of the member and a hollow widen-ed base-like lower portion having two side walls extending down-wardly and outwardly which extends substantially the complete length of the member. The member simplifies the casting of flat concrete or the like surfaces and acts as a thin spacer between adjacent slabs and permits free movement of the slabs during ex-pansion and contraction.
A light-weight elongated sectional member usable as a ruler for casting concrete surfaces or the like on the ground and comprising an upper portion forming a ridge and extending sub-stantially the complete length of the member and a hollow widen-ed base-like lower portion having two side walls extending down-wardly and outwardly which extends substantially the complete length of the member. The member simplifies the casting of flat concrete or the like surfaces and acts as a thin spacer between adjacent slabs and permits free movement of the slabs during ex-pansion and contraction.
Description
-1~64725 ~ he present invention relates to a device usable for casting concre_ -te Æ faceæ or the like. Wi-th a view to make flat concrete surfaces it is knownto use casting rulers arranged so as to form a formwork, shuttering or like casing or framing into which the concrete is cast, worked or placed. The flat-ness of the visible surface is achieved by scraping the top surface of the concrete.
According to an improvement known in the prior state of the art and disclosed in the ~rench patent specification N 2,13~,792 in the name of the same applicant there are used concrete rulePs or like beam-shaped members com-prising a ridge-like or web-shaped upper portion and a base-like widened lower portion used as a sacrifice shuttering or formwork and which remain embedded in the concrete mass after having perfoxmed their function as shuttering ele-ments or like formwork components.
Such prefabricated elements however suffer from the inconvenience of being heavy and cu~bersome or bulky. It is difficult and expensive to carry or convey them to the places of use ; moreoveP their length has been prede-termined before they are forwarded to the building site thereby involving difficulties of adapting them to any shapes of ooncrete slabs or like plates.
The objeot of the present invention is to avoid these drawbacks and for this purpose it provides a ligh~-weight ~3ectional bar or like member the lower portion of whioh is open ~ h~llow sub~tantially over -the full length of said sectional bar~
According to another essential characterizing feature of the inven-tion ~uch light-weight sectional bars are reinforced or strengthened and sta-bilized by casting concrete or any other settable or hardenable material into the inside of the open or hollow lower portions of su¢h ~ectional bars. Such ~` a reinforcing enables to aohie~e a good resistance to the pushing forces or thrust of the concrete when casting the slab. On account of such a filling the very strong side forces due to the weight of the concrete slabs pressing or bearing from the outside against the ruler are ea~ily ~ustained.
Accordihg to the invention the users only have to carry or convey the light-weight sectional members made for instance from plastics material since concrete is available on the working site.
The deliveries may therefore be accomplished over inter~ational ai8-tances without substantially burden or encumber the cost prices. In addition the material used is strong, of light weight, practical and economical.
It does not get ru~ty and wears away at the same time as the slab is wearing away while retaining the init~al appearance of the latter ; in addition it makes the use of stripping or releasing oils quite useless as said sectional bars are adapted to remain or be left embedded within the mass ~, Jr body of the concrete slab.
It is moreover possible to make concrete slabs of any de-sired size by placing these rulers suitably. The junction between any two sectional bars at a given angle may be carried out perfect-ly by sawing the plastic shells or members to the desired lengths.
Any special lengths needed may be obtained on the building site ac-cording to requirements by sawing on the spot.
These purposes and objects are satisfied by the present invention which specifically relates to a light-weight elongated sectional member of generally Y-shaped cross-section for use as a levelling aid and expansion joint and which is embedded during the casting of paving surfaces, the sectional member being of inverted Y-shape when in use and comprising a thin web having an upper edge which provides a levelling edge, and two downwardly diverging legs, the legs having along their lower edges outwardly extending longi-tudinal flanges upon which the member stands, and at least one long-itudinal rib extending along the inner surface of each leg, the sectional member being of non-metallic substantially inelastic mat-erial to retain its sectional shape during casting and use and its upper edge flush with the paving surfaces.
The invention also discloses a method of casting concrete surfaces, comprising the steps of using the above sectional members and casting a reinforcing concrete between the legs before employing said reinforced sectional members as concrete sectional members.
The invention will be better understood and further char-acterizing features, details and advantages thereof will appear more clearly as the following explanatory description proceeds with refer-ence to the accompanying diagrammatic drawings given by way of non-limiting examples only illustrating several specific presently pre-- 30 ferred forms of embodiment of the invention and wherein:
Figure 1 shows a perspective view of a cross-section through a light-weight sectional member or bar forming a casting ruler ac-cording to the invention;
Figure 2 shows a perspective view of a shuttering or like
According to an improvement known in the prior state of the art and disclosed in the ~rench patent specification N 2,13~,792 in the name of the same applicant there are used concrete rulePs or like beam-shaped members com-prising a ridge-like or web-shaped upper portion and a base-like widened lower portion used as a sacrifice shuttering or formwork and which remain embedded in the concrete mass after having perfoxmed their function as shuttering ele-ments or like formwork components.
Such prefabricated elements however suffer from the inconvenience of being heavy and cu~bersome or bulky. It is difficult and expensive to carry or convey them to the places of use ; moreoveP their length has been prede-termined before they are forwarded to the building site thereby involving difficulties of adapting them to any shapes of ooncrete slabs or like plates.
The objeot of the present invention is to avoid these drawbacks and for this purpose it provides a ligh~-weight ~3ectional bar or like member the lower portion of whioh is open ~ h~llow sub~tantially over -the full length of said sectional bar~
According to another essential characterizing feature of the inven-tion ~uch light-weight sectional bars are reinforced or strengthened and sta-bilized by casting concrete or any other settable or hardenable material into the inside of the open or hollow lower portions of su¢h ~ectional bars. Such ~` a reinforcing enables to aohie~e a good resistance to the pushing forces or thrust of the concrete when casting the slab. On account of such a filling the very strong side forces due to the weight of the concrete slabs pressing or bearing from the outside against the ruler are ea~ily ~ustained.
Accordihg to the invention the users only have to carry or convey the light-weight sectional members made for instance from plastics material since concrete is available on the working site.
The deliveries may therefore be accomplished over inter~ational ai8-tances without substantially burden or encumber the cost prices. In addition the material used is strong, of light weight, practical and economical.
It does not get ru~ty and wears away at the same time as the slab is wearing away while retaining the init~al appearance of the latter ; in addition it makes the use of stripping or releasing oils quite useless as said sectional bars are adapted to remain or be left embedded within the mass ~, Jr body of the concrete slab.
It is moreover possible to make concrete slabs of any de-sired size by placing these rulers suitably. The junction between any two sectional bars at a given angle may be carried out perfect-ly by sawing the plastic shells or members to the desired lengths.
Any special lengths needed may be obtained on the building site ac-cording to requirements by sawing on the spot.
These purposes and objects are satisfied by the present invention which specifically relates to a light-weight elongated sectional member of generally Y-shaped cross-section for use as a levelling aid and expansion joint and which is embedded during the casting of paving surfaces, the sectional member being of inverted Y-shape when in use and comprising a thin web having an upper edge which provides a levelling edge, and two downwardly diverging legs, the legs having along their lower edges outwardly extending longi-tudinal flanges upon which the member stands, and at least one long-itudinal rib extending along the inner surface of each leg, the sectional member being of non-metallic substantially inelastic mat-erial to retain its sectional shape during casting and use and its upper edge flush with the paving surfaces.
The invention also discloses a method of casting concrete surfaces, comprising the steps of using the above sectional members and casting a reinforcing concrete between the legs before employing said reinforced sectional members as concrete sectional members.
The invention will be better understood and further char-acterizing features, details and advantages thereof will appear more clearly as the following explanatory description proceeds with refer-ence to the accompanying diagrammatic drawings given by way of non-limiting examples only illustrating several specific presently pre-- 30 ferred forms of embodiment of the invention and wherein:
Figure 1 shows a perspective view of a cross-section through a light-weight sectional member or bar forming a casting ruler ac-cording to the invention;
Figure 2 shows a perspective view of a shuttering or like
-2-~/~647~5 formwork made by assembling rulers extending at right angles toeach other; and Figure 3 shows a cross-section through another form of embodiment of the invention wherein a double parallel sectional shape has been adapted to the sectional bars.
According to the form of embodiment shown in Figure 1, a sectional member or bar 1 exhibits a thin upper web or ridge 2 which is thicker than the sidewaIls3, 4 of the hollow lower part, which hollow part 5 comprises on its inner faces projecting ribs 6 with tenons or lugs 7 or other protrusions; bearing flanges or footings or like bases 8 and 9 are provided at the bottom slightly at angles opening outwards. On the other hand a sleeve or bushing 10 is provided substantially at the top and in the axial plane of said open lower portion of the sectional member.
The aforesaid tenons or lugs are provided so as to be hooked or anchored within the concrete 11 cast inside as shown more clearly in Figure 2. They perfectly cling to the concrete as the latter contracts or tightens upon drying or setting; the ; bearing flanges 8 and 9 will later on facilitate the bedding, fastening or fixing of the ruler upon being laid; as to the sleeve or bushing 10 it is adapted to receive a rod (not shown) for aligning the sectional bars end to end in registering relation-ship.
The symmetrical shape of the ruler which is an isosceles triangle in the case of Figure 1 enables a uniform shinkage of t,he filling concrete clinging to or gripping the inside faces of the hollow part of the sectional bar thereby avoiding any possible bending or deflexion of this 6~2~
sectional member. Moreover as the outer edges of the ruler are smooth they do not adhere to the slab concrete more especially as when eaid ruler is advan-tageously extruded from a plastics material of suitable grade or quality. ~he shri~cage of the concrete of such slabs will take place straig~ forwardly and avoid cracks outside of these areas. Owing to the steep or very sloping shapes of the legs or faces 3,4 of the sectional bars only a small portion of the slab iB supported by the sectional bar. When using such sectional members it is pos-sible to replace reinforced concrete elements having a certain width by others which are narrower without reduoing the strength characteristics of the slabs 1~ thereby enabling to significantly reduce the weight and accordingly the cost price of the construction.
On the other hand a substantial technical ad~antage of tne sectional members according to the invention is the thinnees or narrowness of the upper ;
ridge or web (a few millimeters) which will be practically invisible once the flagging, paving or flooring has been formed. It is possible to use this ruler for flaggings, pavings, or like slabbings which have been increased in hardness (chafing or wearing layer) by incorporating carborundum therèin for instance.
The sectiOnal member according to the present invention is of course ; ~ not at all limited to the for~ of embodiment shown in ~i F e 1. In particular the shape of the upper ridge or web may be straight, curved or bulging, tape-ring or conical, Z-shaped or hollow ; the tenons or lugs of the inner face of the hollow portion may be provided in a number proportional to -the height of the ruler ; the assembling or connecting device may be provided at the ends `~ of the sectional member as well as throughout the length thereof ; it may differ ~rom the de~ice shown in ~igure 1 or be positioned at any other loca-tion of the hollow portion. This aforesaid hollow portion may al~o have a ~hape differing from that of an i~osceles triangle or ~ctangle.
Moreover this hollow portion may if desired be closed rather than opening downwards as previously described.
~ igure 2 illustrates a shuttaring, formwor~ or like casing or fra-ming made from sectional members according to the present invention in the case of forming rectangular concrete slabs. Once these light-weight sectional members have been prepared or made to the desired lengths, stiffened or rein-forced with filling concrete they are accurately aligned by means of the assembling or joining devioes mentioned hereinabove. ~he sectional cross-members joining two lines or ro~ls of sectional bars are prepared by suitable sawing after ha~ing previously broken off that part of the filling concrete which is likaly to impede the sawing step. Moreover they are advantageously sealed or fixed in position before casting the slabs by means of anchoring joints 18, 19 embedding one portion of the seatings or bearing flanges or _3 ,i L72~
footingæ 8, 9 of the rulers 1.
Pigure 3 shows another form of em ~diment of casting ~lers according to the invention compriæing a second substantially flat sectional member 12 extending in parallel relation to a side face of the first sectlona member, the s~ace left bet~een this new sectional member and the side face or wall of the first sectional member being filled with a flexible or yielding packing material 13 such as polystyrene or neoprene for instance. ~his second sectional member 12 is secured to~the first sectional member 1 by means of ribs or tenons 14, 15 which co-operate with the oppositely lying outwards projecting ridge or flange 9 of the sectional bar 1.
~ he additional provision of the flexible or yielding interme-diate packing 13 enables to obtain a ruler adapted to absorb stresses upon the expansions of any two con'fronting concrete slabs 16, 17. The shape of the in-~e~mediate æpace or gap provided at an open angle prevents the soft packing w*ichils located therein from being lifted or raised.
, At 18', 19~i are shown fixing or sealing joints for the sec-tional rulers,1, 12 similar to the sealings or the fixings 18, 19 seen in ~i-gure 2.
It i~ also posisible to i~void the additional provision of the ' 20 ~ soft packing 13 of the kind described~3;,for this purpose the sectional member ` 12 may exhibl~ resilient thin or fine ribs connecting it at evenly spaced,interval8 throughout its hei~ht to the outside faoe of the first sectional mèmber.-he present invention is of course not'at all limited to the orms of embodiment described~which ha~e been disclosed by way of example only.
~ In particular, it oomprise ,all the means constituting techni~l equivalents ,~ ~ 'of the~means desc~ibed aa well as their combinations if same are carried out ~ aooording to its gist and used wlthin the sc~pe of the appended olaim8.
~ ; ' ' :
According to the form of embodiment shown in Figure 1, a sectional member or bar 1 exhibits a thin upper web or ridge 2 which is thicker than the sidewaIls3, 4 of the hollow lower part, which hollow part 5 comprises on its inner faces projecting ribs 6 with tenons or lugs 7 or other protrusions; bearing flanges or footings or like bases 8 and 9 are provided at the bottom slightly at angles opening outwards. On the other hand a sleeve or bushing 10 is provided substantially at the top and in the axial plane of said open lower portion of the sectional member.
The aforesaid tenons or lugs are provided so as to be hooked or anchored within the concrete 11 cast inside as shown more clearly in Figure 2. They perfectly cling to the concrete as the latter contracts or tightens upon drying or setting; the ; bearing flanges 8 and 9 will later on facilitate the bedding, fastening or fixing of the ruler upon being laid; as to the sleeve or bushing 10 it is adapted to receive a rod (not shown) for aligning the sectional bars end to end in registering relation-ship.
The symmetrical shape of the ruler which is an isosceles triangle in the case of Figure 1 enables a uniform shinkage of t,he filling concrete clinging to or gripping the inside faces of the hollow part of the sectional bar thereby avoiding any possible bending or deflexion of this 6~2~
sectional member. Moreover as the outer edges of the ruler are smooth they do not adhere to the slab concrete more especially as when eaid ruler is advan-tageously extruded from a plastics material of suitable grade or quality. ~he shri~cage of the concrete of such slabs will take place straig~ forwardly and avoid cracks outside of these areas. Owing to the steep or very sloping shapes of the legs or faces 3,4 of the sectional bars only a small portion of the slab iB supported by the sectional bar. When using such sectional members it is pos-sible to replace reinforced concrete elements having a certain width by others which are narrower without reduoing the strength characteristics of the slabs 1~ thereby enabling to significantly reduce the weight and accordingly the cost price of the construction.
On the other hand a substantial technical ad~antage of tne sectional members according to the invention is the thinnees or narrowness of the upper ;
ridge or web (a few millimeters) which will be practically invisible once the flagging, paving or flooring has been formed. It is possible to use this ruler for flaggings, pavings, or like slabbings which have been increased in hardness (chafing or wearing layer) by incorporating carborundum therèin for instance.
The sectiOnal member according to the present invention is of course ; ~ not at all limited to the for~ of embodiment shown in ~i F e 1. In particular the shape of the upper ridge or web may be straight, curved or bulging, tape-ring or conical, Z-shaped or hollow ; the tenons or lugs of the inner face of the hollow portion may be provided in a number proportional to -the height of the ruler ; the assembling or connecting device may be provided at the ends `~ of the sectional member as well as throughout the length thereof ; it may differ ~rom the de~ice shown in ~igure 1 or be positioned at any other loca-tion of the hollow portion. This aforesaid hollow portion may al~o have a ~hape differing from that of an i~osceles triangle or ~ctangle.
Moreover this hollow portion may if desired be closed rather than opening downwards as previously described.
~ igure 2 illustrates a shuttaring, formwor~ or like casing or fra-ming made from sectional members according to the present invention in the case of forming rectangular concrete slabs. Once these light-weight sectional members have been prepared or made to the desired lengths, stiffened or rein-forced with filling concrete they are accurately aligned by means of the assembling or joining devioes mentioned hereinabove. ~he sectional cross-members joining two lines or ro~ls of sectional bars are prepared by suitable sawing after ha~ing previously broken off that part of the filling concrete which is likaly to impede the sawing step. Moreover they are advantageously sealed or fixed in position before casting the slabs by means of anchoring joints 18, 19 embedding one portion of the seatings or bearing flanges or _3 ,i L72~
footingæ 8, 9 of the rulers 1.
Pigure 3 shows another form of em ~diment of casting ~lers according to the invention compriæing a second substantially flat sectional member 12 extending in parallel relation to a side face of the first sectlona member, the s~ace left bet~een this new sectional member and the side face or wall of the first sectional member being filled with a flexible or yielding packing material 13 such as polystyrene or neoprene for instance. ~his second sectional member 12 is secured to~the first sectional member 1 by means of ribs or tenons 14, 15 which co-operate with the oppositely lying outwards projecting ridge or flange 9 of the sectional bar 1.
~ he additional provision of the flexible or yielding interme-diate packing 13 enables to obtain a ruler adapted to absorb stresses upon the expansions of any two con'fronting concrete slabs 16, 17. The shape of the in-~e~mediate æpace or gap provided at an open angle prevents the soft packing w*ichils located therein from being lifted or raised.
, At 18', 19~i are shown fixing or sealing joints for the sec-tional rulers,1, 12 similar to the sealings or the fixings 18, 19 seen in ~i-gure 2.
It i~ also posisible to i~void the additional provision of the ' 20 ~ soft packing 13 of the kind described~3;,for this purpose the sectional member ` 12 may exhibl~ resilient thin or fine ribs connecting it at evenly spaced,interval8 throughout its hei~ht to the outside faoe of the first sectional mèmber.-he present invention is of course not'at all limited to the orms of embodiment described~which ha~e been disclosed by way of example only.
~ In particular, it oomprise ,all the means constituting techni~l equivalents ,~ ~ 'of the~means desc~ibed aa well as their combinations if same are carried out ~ aooording to its gist and used wlthin the sc~pe of the appended olaim8.
~ ; ' ' :
Claims (6)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A light-weight elongated sectional member of gen-erally Y-shaped cross-section for use as a levelling aid and ex-pansion joint and which is embedded during the casting of paving surfaces, the sectional member being of inverted Y-shape when in use and comprising a thin web having an upper edge which provides a levelling edge, and two downwardly diverging legs, the legs having along their lower edges outwardly extending longitudinal flanges upon which the member stands, and at least one longitud-inal rib extending along the inner surface of each leg, the sec-tional member being of non-metallic substantially inelastic mat-erial to retain its sectional shape during casting and use and its upper edge flush with the paving surfaces.
2. A sectional member according to claim 1, made of plastics material.
3. A sectional member according to claim 1, having at least at one of its ends a bushing to receive an aligning rod to establish registering relationship and enable the member to be aligned end to end with an identical member.
4. A sectional member according to claim 3, wherein the bushing is in a central portion thereof substantially at the intersection of said web and said legs.
5. A sectional member according to claim 1, further comprising at least one substantially flat sectional member hav-ing a section extending in substantially parallel relation to one outer longitudinal side of the Y-shaped sectional member, the space left between said substantially flat sectional member and said outer side face of said Y-shaped member being adapted to receive flexible packing material.
6. A sectional member according to claim 5, wherein the lower edge of the substantially flat sectional member is pro-vided with complementary flanges to engage the flange provided on a leg of the Y-shaped member.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7520080A FR2315595A1 (en) | 1975-06-26 | 1975-06-26 | NEW PROFILE THAT CAN BE USED AS A RULER FOR CASTING CONCRETE SURFACES |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1064725A true CA1064725A (en) | 1979-10-23 |
Family
ID=9157097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA236,420A Expired CA1064725A (en) | 1975-06-26 | 1975-09-25 | Sectional bar usable as a concrete surface casting ruler |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE843333A (en) |
| CA (1) | CA1064725A (en) |
| CH (1) | CH606706A5 (en) |
| DE (1) | DE7620213U1 (en) |
| FR (1) | FR2315595A1 (en) |
| GB (1) | GB1543609A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE431241B (en) * | 1980-03-04 | 1984-01-23 | Vm Permaban Ab | DEVICE FOR PLACING FLOORS OF CONCRETE |
| GB9008977D0 (en) * | 1990-04-21 | 1990-06-20 | Permaban U K Company Limited | Screed rail |
| AU3621595A (en) * | 1994-09-27 | 1996-04-19 | Lesa Systems Limited | Method and apparatus for forming adjacent floor slabs |
| DE29806404U1 (en) * | 1998-04-08 | 1998-07-02 | Tiletschke, Lothar, 32130 Enger | Formwork element for an expansion joint between two concrete bodies |
| GB2357104B (en) * | 1999-12-09 | 2002-07-17 | Raymond Hughes | A shuttering device |
-
1975
- 1975-06-26 FR FR7520080A patent/FR2315595A1/en active Granted
- 1975-09-25 CA CA236,420A patent/CA1064725A/en not_active Expired
-
1976
- 1976-06-23 CH CH803176A patent/CH606706A5/xx not_active IP Right Cessation
- 1976-06-24 GB GB2640276A patent/GB1543609A/en not_active Expired
- 1976-06-24 BE BE168244A patent/BE843333A/en unknown
- 1976-06-25 DE DE19767620213 patent/DE7620213U1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2315595B1 (en) | 1982-05-21 |
| BE843333A (en) | 1976-12-24 |
| DE7620213U1 (en) | 1976-12-30 |
| GB1543609A (en) | 1979-04-04 |
| FR2315595A1 (en) | 1977-01-21 |
| CH606706A5 (en) | 1978-11-15 |
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