DE1434471A1 - Formwork for ribbed concrete ceilings - Google Patents

Description

Patent attorney » Dipl.-Ing. A. Grünecker

8 Munich 22. Maximllianatr. 43 ΓΗ 12S

PH 225

κ: =: = SESsi

M. Siebenson, Bauunternehnmng, Schweinfurt 1,

ijnt. Marienbach 2

Formwork for concrete rib ceilings

The invention relates to a formwork for the production of reinforced concrete ribbed ceilings, consisting of formwork baskets made of a wire mesh covered with a flexible covering, the formwork bodies resting on a framework are kept at their distance from one another by spacer elements.

In a known formwork of this ax, the .Schalkäne aue welded steel wire frame and a

809901/0165

New accidents {Art. 711 Paragraph Ζ No.t Sati 3 of the Anderungsees. v. 4.9.1967)

above c ^ ty: n ! lrmr -: -. ■■ '; • , J ^ '■ i 1'} lech under - .. ' Tin- .si 'k "i every rogue: ■ jfh-iE Ol '■' _ ^: ■ ;. ii ¹ orb is aii .; " dv: ·: -: - \ . · Schr.lkorbau ■ ii ■ - * ■ theirs under *). ι linder ^1. · t! i.v the alliesί : öirifl, V, 'bv

Vlgefltioiit. Organic Körbai are available as:. auagutil lot, Dia Albcleakung \ -: L --An ί »Ί pnpier« Every scarf- .. km i) uersahnitb dea '- »fentL ^ t, which an dmon" swoL Daohlathen; aii3g <j formed sohal body lies with the Uachls · T h & n uuf ". '/ Oi aohipalen LUngslalten, which are + .lioh next to lüngalaufeadsn Kanhhölaern so that they are about a lower sitaan than the top of the squared timber, ao that in this way and" Yeioe a side stop for the shawl baskets The lengthways slats rest loosely on round iron bars that are inserted straight through squared timbers. The squared timbers? / iedf: rum lie on transverse supports that are supported in uikaii: tar / eise The oil paper used for this purpose remains in the finished dock (BBP 802 357). However, the construction of such a formwork is relatively time-consuming and difficult. The lateral spacing of the half baskets from one another is also not guaranteed, since they only rest loosely on the longitudinal slats The use of vibratory compactors would shift these baskets out of their position, which can have extremely unpleasant consequences. Finally, the stripping of the formwork is associated with difficulties insofar as the formwork baskets are pushed sideways by the pressure of the buton rib between the transverse boards

.. - 2 - iAD ORIGINAL

809901/0165

leh; M vcofü-iüi . ■ * .: "'■ <■. ·': onv _: -. · '' ; - ^; j ^[ Λ ¹ - ·. nr-'ll-rt then difficult by dcD Ripron r; I. '.' ·· · ;: '<■'('}' ■ • 'i'i. R-ii. *. ^{Ern r} üf- jm cross section eile Trapessfcir, ail « ^-: '..;. ? »■ ..

lj «.! ' KrClnütinf ¹ If ^ t du- Ajif.il> -: ■ i-irri.ir.ri a formwork ivv ti- · i-ori 'irr. ; t »def)]« Gii 2u soi. · ^: "γ. '· ..» lit, both in their / urlil ^ unt ί »1 ·: in front of all, rue · ii' Λ. or handling beeoniers ο inf. el. um! time-saving iai ..

For losing 'liener Auifabe f? Le dJ. "¹; rfindun £ ·; vor, on !? the iJisianreeleDJonte nlf5 remaining in the Uechi, on dr- Ger'Jst an gc hefte te Nage]] ei stan uw3 {: ibidl ( lot and nebp.r · them upright si-ehrrj ^ f ;, i; r. the Ik Henf! high of the ordered shawl basket au ^ iGf ^ hdf? ^A ihntandaleisten are arranged, while the flfxibl · :; BeIi; / from onec ^ erksstoff von certain hlastizii; ' ^! .? -. B. ous Kunrlatoff in Folienfori.1 consists, v / olche r'olie £ .1 eichte i ti £ to Festapannen the Gl.nlilkorbR and it ^r ^ botant'sleiter serves, in from which the foil, from 'the: Gerf.st jjpgenJ,' lu.rcij staples a nail strip on the scaffolding and from there over the spacer strip and the outer basket surfaces to the opposite distance bead under the corresponding nail strip and with this reatgGRpannt i & t.

In this way and. '.' Eisi ' ^v -rm the formwork very quickly brought together v / er ¹ ·: n, but the distance nwipchen the shawl baskets is yoll>o'.ir.fii aich ^ rgor-jtellt. In addition, the schli :; right next to the 3ofc: üM; rben upright Abrtonoi:] eibtei 'jnc'-ferr. 'ί' ^ leich'ee. Stripping,

BATH ORIGINAL

809901/0165

than - after removing the spacer loists - there is a sufficient distance laterally between the baskets and the concrete rib so that the silk baskets slide more or less by themselves after removing the baskets from the finished ceiling. In addition, rird. you. eh the use of the spacer strips also avoids damage to the plastic film, so that these films can be used several times the distal duck used to attach the film to the framework also serve as nail strips and remain in the rib

In order to prevent deformation of the shawl baskets despite lateral tensioning, each shawl basket can, according to the invention, be designed as a closed, dimensionally stable box welded to a wire mesh reinforcement. This can be done in a particularly simple way that is more favorable in terms of strength by the fact that each half basket, together with the stiffening, consists of a piece of wire mat, which, starting from one end, is initially bent in a cigzag shape to create the stiffening and then to achieve it the closed basket shape is curved around the zigzag reinforcement ♦

The use of the sextile next to the shawl baskets arranged upright continues to convey that

■ ■ - '. - 4 80990

Advantage «that the height of the spacer bars to the assigned Shawl basket e.g. by placing longitudinal ends underneath The dance floor is adjustable under the SchalkÖrbe. This can only be done by using additional spacer planks The height of the dump can be changed as desired »On the other hand, on the training of the formwork itself needs to this Purpose no change can be made.

The drawing shows an exemplary embodiment in the subject matter of the invention. FIG. 2 shows the formwork in a spatial representation. FIG. 2 shows a cross section through the formwork for a

certain back height
5 shows a cross section through a further formwork

to achieve a greater hip height, Fig. 4 the finished »stripped concrete ribbed ceiling with plaster base and ceiling plaster placed on it ii cross-section un4
Fig. 5 a - f the production of the shawl basket from a wire mat.

are fit "US Figure" 1 visible on scarf piles 1 which are on formwork carriers 2, scarf baskets 3 arranged in Abitand each other * Each scarf basket 3 seiet in cross section a calibration rerjüngende upward Trapeiform out, wherein on each side 5 'of a Schalkorbea 3 standing on edge Spacer strips 4 are arranged between the spacer strips 4

BATHROOM ORIGINAL - 5 -

109801/0188

3v / eic: _: Turkic Κυί ν ter 3üiul | Ö '"^ i 3 is jav / eilu a g 5 8-uf dsQ Sebilbaölen 1 arranged on top, each scarf ** basket is covered by ^ b a plastic film β, which, on (ion öehell-oulen 1 iiegeml _? pinned to the planks 1 through the nail bar 5 - .si mad? cm there over the spacer bar 4 and the basket outer surfaces y to the pgenu - the spacer bar under the hage! It has been pulled out, the cover film 6 thus wraps the loose cover on its side 3 ^!

4 fin «

Each original basket 3 consists of a tiriwig ^ Prahtmatte 7 (Fig. 5a)>? On the sineni end of the mat is eüeselfee in 2aeksaak aligsbogBn - according to the On this WetJLS.e first the / wire mesh construction 8- Then the end is around the last Eqke 9 of the i ^ gifiing 8 bent over as a straight leg 10 (fig, 5a) to svm Infang der Mai te. There is another bend to achieve a side edge Y C; Fi | «5d) wn there is a renewed bend | Utif the upper side 3 '^ Ses' Trapej ^ r aimed (? I§« 5e> * finally results in §. ie.h through the "" last ^ Ifebiepng dai second Seitenentfil 3 'of the trapezium, "" * ■

■. ■ "■ - ■ - .- ■■ ■■ -." ■ - ■■ · .. - ■ "■" ■ - ■ "■ ■ ■ ■■■■

where dts We djaser limbiegung aa-äejp Biegfkaate 9

Versalweißt is (Iig _ft 5f) _v In addition, the at , -deal contact points ill ien the exterior of the visual body ^ by welding, anptieftet »so eta lie * and ^ erelrahfester sleeping basket won \ nM _t

U3U71

can also be exposed to very rough operation without the risk of damage.

The entire circuit is composed as follows: Assume that the teaching formwork is in the form of the Formwork support 2 and the formwork piles 1 is erected. On the shuttering piles 1 is first the outermost hand Formwork a formwork basket 3 is placed and a stop bar 4 is leaned on edge on the side part 3 'of the basket 3. The plastic film 6, which rests next to the stop bar 4 on the formwork piles 1, is spread over the basket 3 and the stop bar 4 that is leaning against it. Then the Foil · attached to the formwork board 2 with a nail bar 5 by means of wire pins 11. Well, along with the next Shelf basket 3 brought another stop bar 4 next to the stapled nail bar 5, then the film 6 over this further basket 3 spread out until cur next nail bar 5. Before tacking this next nail bar the film 6 is tightened so that it is elastically stretched away over the basket 3 and the stop bar 4. Then it will be the second nail rivet 5 in turn by means of the wire pins 11 attached to the shuttering piles 1 and the next shuttering basket 3 is connected in the manner described · The elastic pretensioning of the film 6 presses the baskets 3 onto the formwork planks. 1 and prevents the baskets from sliding lengthways.3 They cannot move sideways,

@ 0990i / oies

»Hurry them over the stops 4 to the stapled Nail strips 5 are pending.

Now can in the usual Aelse. the reinforcement 12 and \ 3 are attached in the formwork, whereby the wire pins 11 can be connected to the reinforcement 13. Then the concrete is poured in the known manner - uiad waited the necessary time bio for the tightening of the concrete. The film 6 prevents; not only that the concrete mass connects with the formwork parts, but above all it ensures a good quality of the concrete in which the concrete Make-up · water cannot drip off.

After the concrete has hardened, disconnect * as follows: - _v

The teaching formwork 2 is lowered so that the formwork piles 1 no longer serve as a support for the formwork * Then the stop bars 4 next to each The basket 5 has been taken out, which does not present any difficulties because, on the one hand, the film 6 forms a smooth surface On the other hand, the shell basket 5 cannot be elastically deformed and consequently also after concreting? do not exert any resilient tension on the stop strips 4 can. After removing the stop bars 4, the individual baskets 3 can be removed from the hetoned ceiling without any jolts. Here, too, the stiff form of each koiv plays a role bes! l ^ a cheap ^ role ^ Finally, the foil webs peeled off and rolled up for reuse

-8th-

* U34471

It is only important that the film webs 6 are not damaged by the ends of the wire pins 11. The holes caused by the wire pins 11 in the foil sheets are on the one hand very small, on the other hand they close with a view to the inherent elasticity of the foil after it has been removed, so that these holes do not prevent the foil sheets 6 from being used again.

Now all that is left to do is to bend the ends of the wire pins 11 protruding from the underside of the nail strips 5, and then the entire de-formwork process is complete already finished.

To cover the underside of the concrete rib,. ' A plaster base 14 is attached to the nail strips 5 and on the ceiling. Plaster base a ceiling plaster 16 is applied (Fig. 4). However, it is also not possible to omit the plaster base and ceiling plaster in purely functional buildings such as warehouses and the like. In this case, the use of the plastic-film webs 6 so far has a particularly favorable effect _f as complete by the underside of the Betönrippendeoke is smooth.

If a bedding ceiling with higher ribs is to be made, then during the shuttering process, wooden sticks 16 are placed under each shawl basket 3, which do not protrude beyond the shawl baskets 3, so that the hangings 4 are now partly on the side parts y of the shawl 3 and eub

-9- bad om _G i _NAi: 809901 / H | 6n:

40 U34471

Part of the rest against the sides of the wooden spacers 16. At dtr formwork itself does not change anything. Because of their flexural and torsion-free construction, the Schalkörb'5 are easily able to carry the concrete resting on them during concreting * vena sit are not completely supported. In this way, a different log ceiling height can only be achieved with the help of additional * spacer timbers that are always present in a building. ,. -, ■ '

It ..be still, get it up, that by using ν from bending and lorsionaatoifen scarf baskets the Köglichkei.t is given, the largest permitted for strength reasons To take advantage of the distance between two concrete ribs, so that the greatest possible amount of material can be saved leaves.

For reasons of economic production, the Shawl baskets manufactured in certain lengths, the baskets being tight along the length when creating a shuttering strung together. If now one of these continuous Rows should be shorter than the others, for example because there is a chimney at this point the differences in the air scent are leveled out by trapezoidal cover plates that are pushed over the last shawl basket and surmount the same in a: desired measure.

. 10 -

1 & S

These sheets are used in the manufacture of the formwork of course also spanned by the film webs, so that in principle also thereby at the Casing does not change anything.

It should also be emphasized that the cross-section of the shawl baskets does not necessarily have to have a trapezoidal shape. It is it is also possible to use an oval cross-section, provided that only the spacer strips 4 are positioned laterally can. These spacer bars prevent a rest Contact of the film webs with the sharp edges 9 (Fig.5f) of the baskets 3, i.e. damage to the foil strips during concreting.

AU α "v

BAD ORiQiNAL - 11 -

80090

Claims (1)

P a t e η t a η a. ρ r Π c h e ί -.) Formwork for the production of τοπ bar concrete ribbed ceilings, consisting of formwork baskets made of a wire mesh covered with an old flexible covering. The scaffolding rest and are kept at their distance from one another by spacer elements, d aduroh. .gt-. Jc en η ζ e ic h η et that the bistance elements are designed as nailing strips (5) that remain in the ceiling and are attached to your frame (1) and that stand next to them on edge on the Seiton flaps (3 ') of the associated shawl basket (3 ) adjacent spacer bar «n (4) arranged Bind, while the flexible BeIyρ; (6) made of a material with a certain elasticity, e.g. 3. consists of Kimststoff in Folienfom which film simultaneously aua clamping the steel baskets (3) and the _{Abstandaleistan;} serving inde "the film (6), mi lying to stand (1) through β ine hail strip (5) on the (4) scaffolding is to be stapled and dia above the spacer bar (4) and the basket outer surfaces (5f) me opposite Abotandslei ate (4) under the entspreoheiiä · Ragelleiste (5) gesüogen and clamped with this IET. 2. Formwork according to claim t, as durchg β ken η ~ ic h% e η _t et Each scarf that basket O) as geechlottefier · with a wire grid Aussteifeng (8) TersohweiBter forabeständiger box formed IISL. New documents (* «·? 11 AI», 5 Mr. JSatr » d ; ■: ■■ ...- V ^^ OtiWfy H3U71 3. Formwork according to claim 2, characterized in that d9.S each formwork basket (3) zueaoictn with the stiffener (8) consists of a piece of wire mat (7), starting from one end first to the Creation of the reinforcement (8) zigzag ^ shaped and bent then to achieve the closed basket shape outside ex the zigzag stiffener (δ) is bent around. 4. shell body according to at least one of claims 1 or 2, characterized in that the height of the baskets (5) in relation to the associated spacer strips (4) e.g. by placing longitudinal spacer planks underneath (16) is adjustable. 8AD OBIQINAt - 13 - 809901/0185 Documents (Art. 711 Abe. 2 No. I Sati 3 d ·· XndwunfliQ ··. Of 4.9.1967)