Patent Abstract:
The invention concerns a system for a free stall barn or the like for keeping animals, especially cattle including a grooved floor configured as a concrete slab. The grooved floor has a floor surface that is between adjacent grooves. The floor surface is provided with an elastic and anti-slip covering that reaches close to the grooves. Furthermore, the invention concerns a pre-cast concrete slab for assembling such a system. The pre-cast concrete slab corresponds to the floor width and, in the longitudinal direction, is provided with adjusting elements for exactly aligning the slabs to be joined. Finally, the invention concerns a method for keeping the animals in the system according to the present invention.

Full Description:
[0001]     This application is a divisional application of U.S. application Ser. No. 10/398,864 filed on Apr. 9, 2003, which is based upon German Patent Application No. DE 100 50 853.7, filed Oct. 13, 2000 and German Application No. 201 12 280.4, filed Jul. 25, 2001. Applicant also claims priority under 35 U.S.C. §365 of PCT/DE/01/03836, filed Oct. 5, 2001. 
     
    
     FIELD OF THE INVENTION  
       [0002]     The invention relates to an arrangement for a cubicle barn or the like for keeping livestock, in particular for cattle, having a grooved floor which is designed as a concrete slab, to a precast concrete slab for this arrangement, and to a method of keeping livestock in such an arrangement.  
         [0003]     For the intensive keeping of livestock, in particular cattle, cubicle barns provide a good compromise for economical, intensive livestock keeping with sufficient freedom of movement for the livestock. In this case, in addition to the respectively assigned cubicles, the livestock are provided with a walkway passage, on which the livestock can move freely.  
       BACKGROUND OF THE INVENTION  
       [0004]     For the straightforward disposal of the animals&#39; urine and feces along this walkway passage, the prior art has dispensed with the scattering of straw and provided a slatted floor with a semi-liquid-manure pit arranged therebeneath. Such slatted floors are described, for example, in EP 0 609 581 A1 and DE 299 07 118 U1. These two documents also propose providing an asphalt or bitumen layer as a walking surface for the livestock. In this case, the slatted-floor elements are formed, for example, in one piece such that projecting edges form for edge reinforcement at the gap borders for the bitumen covering.  
         [0005]     The disadvantage here, however, is that the livestock are constantly exposed to the gases escaping from the semi-liquid manure collected beneath the slatted floor. It is thus known for cubicle barns to be equipped with walkway passages designed as floors with grooves or channels.  
         [0006]     The grooved floor is produced as a concrete floor or precast concrete unit with channel-form grooves and essentially closes off the semi-liquid-manure pit located therebeneath. The semi-liquid manure reaches the pit located therebeneath via through-passage bores arranged in the grooves. The gases correspondingly pose less of a problem.  
         [0007]     The 2000/2001 price list from Brouwers Stalinrichtingen B. V., 8901 B A Leeuwarden, Holland, page 74, discloses a grooved floor of the generic type which has a reciprocating slide with a hard-rubber block for cleaning the floor surfaces and grooves.  
         [0008]     Furthermore, mats which can be laid on the underlying surface, for example as found in the “UBO” catalog from M. Gloggler, Neu-Ulm/Schwaighofen, have been known since Jun. 25, 1981 at the German Patent and Trademark Office and are disclosed in DE 26 10 954 A1. These mats consist of essentially homogenous rubber material which, on account of the elastic and heat-insulating properties, is intended to increase, in particular, the lying comfort for the livestock.  
         [0009]     The disadvantage with the current prior art mentioned above is that the animals&#39; feces and urine is present in a mixed-together and non-bound state as so-called semi-liquid manure. The handling-related advantages of the now usually used semi-liquid-manure system in comparison with the earlier operation of manual straw scattering and mucking come at the price of the considerably more aggressive properties of the semi-liquid manure. The development of gases in semi-liquid-manure pits gives rise to a health hazard for people and animals and to a considerable risk of accidents for the operatives carrying out maintenance or repair work on semi-liquid-manure pits. The intermixing of the semi-liquid manure in the semi-liquid-manure pit before the semi-liquid manure is extracted results in the harmful gases being released to a particularly pronounced extent and increases the health hazards. When using semi-liquid manure for fertilization, the “hydrogen-cyanide gas” produced in the semi-liquid manure is toxic to the soil life, with the result that the soil life is rendered inactive and/or reduced and the soil quality is thus impaired, which results in a reduction in yield. Furthermore, flushing out scarcely bound nitrates has a considerable adverse effect on the groundwater.  
         [0010]     It is also disadvantageous that the level of comfort for the livestock is lower in comparison with barns scattered with straw. The concrete floor is very hard and cold for the animals. Furthermore, there is a risk of the livestock being injured by slipping on the relatively smooth concrete surface.  
       SUMMARY OF THE INVENTION  
       [0011]     Taking the grooved floor of the generic type as departure point, the object of the invention is to specify an improved arrangement for a cubicle barn and an improved method of keeping livestock for such an arrangement, in the case of which, along with straightforward handling, the level of comfort for the livestock is improved and the presence of semi-liquid manure is avoided.  
         [0012]     Since the floor surface, between adjacent grooves, is provided with an elastic and anti-slip covering, which extends into the vicinity of the grooves, the level of comfort of the surface on which the animals tread is improved. The elastic and anti-slip covering also prevents the animals from slipping on the surface.  
         [0013]     Undesired shearing off of the covering at the groove border is avoided by the covering terminating before the groove border.  
         [0014]     Since the grooves in the floor are defined by stable U-profiles, essentially wear-free groove flanks are formed. The groove width may thus be adapted optimally to the livestock using the grooved floor, since the U-profile prevents the groove flanks from breaking and consequently prevents the animals from sustaining injuries in the foot region.  
         [0015]     The U-profiles are preferably produced from fracture-resistant rigid plastic or metal, in particular steel. Plastic profiles are indeed essentially rotproof, but tend to wear to a somewhat greater extent at their top edge, whereas steel U-profiles do start to rust quickly in the acid environment, but wear to a lesser extent at the top edge.  
         [0016]     For the production of the grooved floor, up to ⅓ to ⅚ of the leg height of the U-profile is concreted into the concrete floor, whereas the rest of the vertical extent between adjacent U-profiles is filled with the covering. The U-profile is thus anchored firmly in the concrete slab. When the grooved-floor surface is reconstructed once it has reached the limit of its useful life, the covering remaining on the surface is removed and the U-profiles are removed from the concrete slab by levering out and/or by burning. New U-profiles are then anchored in the existing concrete channels using suitable fastening means and a new surface covering is applied between adjacent U-profiles.  
         [0017]     The U-profile has a leg height of from 2 to 20 cm, preferably approximately 10 cm, and forms a groove width of from 3 to 4 cm, preferably 3.5 cm. In the preferred configuration, the U-profile penetrates approximately 7 cm into the concrete floor, with the result that the surface covering is approximately 3 cm thick.  
         [0018]     In order to facilitate an equally spaced-apart, dimensionally accurate construction of the grooves defined by the U-profiles, the parallel U-profiles are connected at their base at the desired spacing by a connecting element, preferably by means of flat iron bars welded therebeneath. In addition to the U-profiles being partially set in concrete, it is possible to fasten these prefabricated U-profile grids, in particular in the case of the U-profiles having a low leg height of only a few centimeters, directly on a planar concrete floor, for example by means of fastener holes and screws, and to fill the interspaces exclusively with the covering. Although, in the case of this arrangement, the groove flanks are permanently defined by the stable U-profile legs, preferably steel profiles, and the risk of injury to the livestock is avoided by the avoidance of worn flanks, the grooved floor nevertheless entails considerable production outlay.  
         [0019]     Since the grooves are defined in full by the concrete of the concrete slab, the time-consuming production method using separately introduced steel U-profiles is not necessary. The concrete slab can be produced in one casting operation. In order, nevertheless, to ensure the considerable improvement in comfort for the livestock by providing an elastic and anti-slip covering, the floor region between adjacent grooves is of sunken configuration in order to accommodate an elastic and anti-slip covering. The concrete projecting portions provided directly adjacent to the grooves here form, as it were, the mold for the elastic covering which is to be introduced.  
         [0020]     Since the accommodating depression of the concrete slab between adjacent grooves has a rectangular or hemiellipsoidal cross section in the cross-sectional direction in relation to the grooves, this ensures a material thickness for the elastic covering which is suitable in respect of comfort improvement and wear resistance, the groove-enclosing concrete groove-border region being of sufficiently stable design.  
         [0021]     Since the concrete border region for the grooves on the surface on both sides of the groove, which is approximately 3 cm wide, has a width of in each case 2 cm and the sunken formation of the concrete surface is approximately 2 cm on average, a sufficiently stable concrete groove-border region is provided, the asphalt layer provided for improving comfort forming a very large part of the surface.  
         [0022]     Since the concrete groove-border region is reinforced by a reinforcing element, preferably a reinforcing steel member, there is an increase in the strength of the concrete border region alongside the grooves, and the situation where the concrete edge may possibly break off is thus avoided to the greatest extent. The reinforcing element may consist, for example, of a reinforcing steel member cast in the concrete in the border region or of a steel reinforcing profile which extends up to the surface.  
         [0023]     The elastic covering is preferably formed from a bituminous substance, preferably asphalt, or an elastomer. Asphalt is a sufficiently elastic and anti-slip surface covering which, in particular, is also resistant to the effects of urine and feces. Furthermore, asphalt is a cost-effective material which is easy to process. Alternatively, the surface may also be formed from an acid-resistant elastomer which, albeit at a higher cost, can also provide a further improvement in comfort.  
         [0024]     The U-profiles are arranged parallel in the longitudinal direction of the grooved floor and have a center-to-center spacing from one another of from 16-50 cm, preferably 25 cm. This provides a sufficient liquid-accommodating capacity for the grooves while, at the same time, giving the widest possible standing surfaces for the livestock.  
         [0025]     Since a liquid-manure pit with a slatted floor for accommodating the liquids collected in the grooves is arranged at at least one head end of the grooved floor, the liquid not taken up by the straw and, if appropriate, sand is intercepted in an effective manner. For cleaning purposes, the liquid-manure pit arranged at at least one head end of the grooved floor may be cleaned by the removal of the slats of the slatted floor without the livestock keeping being seriously influenced, this being done, for example, for dredging solids which have been washed along in the liquid manure. During normal operation, the slatted floor serves as a connecting passage between parallel grooved floors.  
         [0026]     If a mucking system with a rake which can be moved in the longitudinal direction of the grooves is arranged on the grooved floor, automatic mucking of the grooved floor is made possible. Preferably in conjunction with the liquid-manure pit with slatted base, arranged at one head end of the grooved floor, the solid constituents, namely the solid manure, is conveyed out of the cubicle barn to an interim manure store via gates which adjoin in the longitudinal direction. The liquid manure passes into the liquid-manure pit via the gaps in the slatted floor.  
         [0027]     In order to achieve particularly effective cleaning of the grooved floor using the mucking system, the rake has tine-like extensions which correspond to the groove arrangement and engage in the grooves during operation.  
         [0028]     Since the grooved floor is formed from precast concrete slabs, the grooved floor can be constructed quickly on site, using precast concrete units which are to be joined to one another, without long drying periods for the concrete having to be taken into account. Precast concrete units can be industrially produced cost-effectively with high dimensional accuracy.  
         [0029]     For retrofitting conventional cubicle barns which are provided with a semi-liquid-manure reservoir beneath the walkway passage designed as a slatted floor, the precast concrete slabs may be laid on the border of the semi-liquid-manure pit as replacement elements for the slats of the slatted floor. Through-passage bores arranged in the grooves allow liquid to pass through from the grooved floor into the former semi-liquid-manure pit.  
         [0030]     The precast concrete slab for constructing an arrangement according to the invention preferably corresponds to the floor width and has fitting elements in the longitudinal direction for the accurately fitting alignment of the slabs which are to be joined to one another. By means of the fitting elements, the grooves of the precast units which are to be joined to one another are aligned in the longitudinal direction, with the result that a mucking rake provided with tines engaging in the grooves does not catch on the transition locations between slabs.  
         [0031]     The fitting elements preferably comprise protrusions arranged on one end side of the slab and associated sockets arranged on the other end side of the slab.  
         [0032]     Since essentially equally spaced-apart grooves are provided over the floor width, a relatively wide central concrete part being provided in the center and in each case one side strip without accommodating depressions for an elastic covering being provided at the border, a preferred floor configuration is one in which a somewhat wider concrete surface is provided in the center and a narrower concrete surface for bearing a reciprocating mucking rake is provided at the sides.  
         [0033]     A considerable improvement in comfort for the livestock is achieved by an organic or mineral binder, for example straw, shredded straw, wood shavings and/or sand, being scattered in the cubicle barn. In keeping with age-old tradition, the bedding scattered binds the feces to form solid manure. The liquid constituents are collected in the grooves and led to the liquid-manure pit. A known automatic mucking system is used in order for the solid manure resting in the grooved floor to be conveyed out of the barn to a collecting location.  
         [0034]     Since solid manure is a higher-grade fertilizer with better nitrate binding than semi-liquid manure, this separation is likewise advantageous for ecological reasons. Furthermore, the liquid manure collected in the pit is less aggressive than the semi-liquid manure. The risks described in the introduction to which the operatives are exposed are considerably fewer in liquid-manure pits.  
         [0035]     In order to reduce the susceptibility to malfunctioning during automatic mucking and to make it possible for the solid manure collected to be used immediately as fertilizer, it is possible for the straw to be distributed in finely cut form in the cubicle barn.  
         [0036]     Additionally scattering wood shavings (bedding) and/or sand in the cubicle barn makes it possible to achieve a further improvement in the operation of binding the liquid and feces. Adding these organic or mineral constituents further increases the quality of the solid manure. 
     
    
     BRIEF DESCRIPTION OF THE DRAWING  
       [0037]     Various exemplary embodiments of the invention are explained in detail hereinbelow with reference to the drawings, in which:  
         [0038]      FIG. 1  shows a plan view of a cubicle barn with a grooved floor,  
         [0039]      FIG. 2  shows, in cross section, a detail of the grooved floor along line II-II illustrated by dashed lines in  FIG. 1 ,  
         [0040]      FIG. 3  shows a three-dimensional view of a grooved-floor concrete slab as a precast unit,  
         [0041]      FIG. 4  shows a cross section through the concrete slab of  FIG. 3  along the dashed line IV-IV,  
         [0042]      FIG. 5  shows a cross section, in detail form, along the end surface of a precast concrete slab according to the invention,  
         [0043]      FIG. 6  shows a plan view of three precast concrete slabs, two of which have been joined to one another and one of which is to be joined, in the embodiment according to  FIG. 5 , and  
         [0044]      FIG. 7  shows a cross section of an alternative embodiment of the grooved-floor concrete slab. 
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0045]      FIG. 1  is a schematic illustration of the plan view of a cubicle barn  100 . In the exemplary embodiment illustrated, the rectangular barn  100  has a double row of cubicles  101  arranged in the center of the barn  100 . Each cubicle  101  provides space for one cow. In each case one walkway floor  1 , which is designed as a grooved floor with grooves  15 , is provided on both sides of the rows of cubicles, along the longitudinal extent of the barn  100 ,  FIG. 1 , for the sake of clarity, only illustrating one cut-away surface area with grooves.  
         [0046]     At that end of the barn which is at the top of the drawing, the two grooved floors  1 ,  1  are connected by a walkway passage  102 . At that end of the rows of cubicles which is illustrated at the bottom of the drawing, the head end  16  of the two grooved floors  1 ,  1  is adjoined by a liquid-manure pit  3  covered by a slatted floor  31 , which, for the sake of clarity, is only illustrated in one cut-away surface area in  FIG. 1 . The slatted floor  31  on the liquid-manure pit  3  is arranged such that the gaps in the slatted floor  31  are aligned in extension of the grooves  15  of the grooved floors  1 ,  1 . In extension of the grooved floors  1 ,  1 , gates  103 ,  103  are provided in the end wall  104  of the barn assigned to the liquid-manure pit  3 .  
         [0047]     Installed on each grooved floor  1  is a mucking system  200  which has a rake  220  which covers over the width of the grooved floor and has tines  221  associated with the grooved-floor geometry (see  FIG. 2 ). A drive unit (not illustrated) is used to move the rake  220  back and forth, as required, in the longitudinal direction of the grooved floor  1  by way of pulling or pushing elements  210 .  
         [0048]     In the exemplary embodiment illustrated, the rake  220  only operates upon movement in the arrow direction  222 . In this case, the solid manure taken up by the rake  220  is pushed along the grooved floor  1 , via the slatted floor  31  and through the open gate  103 , into an interim manure store  4  arranged outside the cubicle barn  100 . During mucking using the rake  220 , the liquid collected in the grooves  15  is likewise transported in the direction of the slatted floor  31  by the tines  221 . In this case, the liquid manure essentially flows through the slatted floor  31  into the liquid-manure pit  3  located therebeneath. Correspondingly, the gaps in the slatted floor  31  are aligned with the grooves of the grooved floors  1 ,  1 . In order to make it possible for the rake  220 , which is equipped with tines  221  engaging in the grooves  15  to pass through freely beyond the slatted floor  31 , the spacers integrally formed on the slats of the slatted floor are recessed on the top side.  
         [0049]      FIG. 2  shows, in cross section, a detail of a grooved floor  1  with a rake  220  sliding above the latter, and likewise shown in detail form. The grooved floor  1  comprises a load-bearing structure  11  made of concrete, which, in the first instance, is poured up to the chain-dotted line  111  to form a planar surface. The grooves  15  of the grooved floor  1  are formed by U-profiles  13 , for example steel profiles. The U-profiles  13  have their base  131  located on the pouring level  111 . The legs  132  of the U-profiles  13  project upward and form the groove  15  which is to be kept free. The interspace is then partially filled with concrete, a top section being filled with an anti-slip and elastic covering  14 . This covering  14 , together with the top edges  133  of the legs  132  of the U-profiles  13 , forms the walkway surface of the grooved floor  1 . For easier installation, the U-profiles  13  are retained parallel to one another, and at equal spacings, by means of connecting elements  134 , for example made of flat iron bars.  
         [0050]     In the exemplary embodiment illustrated, the steel U-profiles  13  have the dimensions 100.times.40.times.3, and are welded to flat iron bars  134  with the dimensions 60.times.8, as a result of which the grooves  15  defined by the U-profile  13  have an inside width of 34 mm.  
         [0051]     These prefabricated U-profile grids are laid on the poured load-bearing structure (pouring level  111 ), aligned and welded to one another in the longitudinal direction and then set in concrete up to a height of 7 cm. The rest of the vertical extent between adjacent U-profiles of 3 cm is filled with asphalt cement as surface covering  14 .  
         [0052]      FIGS. 3 and 4  show a further exemplary embodiment for the grooved floor  1 , in the case of which the load-bearing structure  11  is prefabricated as a precast concrete unit of standard dimensions.  FIG. 3  shows a three-dimensional view of a precast concrete unit for covering conventional semi-liquid-manure pits as a replacement element for the conventional slats for slatted floors.  
         [0053]     As is illustrated in cross section in  FIG. 4 , the U-profiles  13  in this exemplary embodiment merely have a leg height of 40 mm in order to ensure, in the case of an overall thickness of the floor slab of 20 cm, sufficient load-bearing capability of the slab which is weakened by the accommodating grooves for the U-profiles. In this case, the U-profiles  13  are only set in the concrete to a depth of approximately 1 cm, with the result that a thickness of approximately 3 cm remains for the asphalt covering  14 .  
         [0054]     In contrast to the abovementioned exemplary embodiment, in this case drainage bores  135  are provided in the base  131  of the U-profiles  13 , and extend through the concrete slab, in order for the liquid manure collected in the grooves to be led away into the pit located therebeneath.  
         [0055]     This exemplary embodiment makes it possible for a conventional cubicle barn with a reservoirs for collecting semi-liquid manure beneath a slatted floor to be converted into an arrangement according to the invention without high outlay being involved. The slats of the slatted floor are lifted and replaced by the precast concrete slabs containing groove profiles.  
         [0056]     In a further embodiment, the grooves are defined in full by the concrete of the concrete slab.  FIG. 5  shows an end view, in detail form, of a precast concrete slab  11  in which a plurality of parallel grooves  15  are formed. Between adjacent grooves  15 , the concrete slab has an accommodating depression  120  which extends more or less as far as the grooves. In the end view illustrated in  FIG. 5 , the accommodating depression  120  has a shallow hemiellipsoidal cross section.  
         [0057]     The grooves  15  are formed with narrow concrete border regions  130  which extend up to the walkway-floor surface  10 . As a result of the hemiellipsoidal cross section of the accommodating depression  120 , the concrete border region in the structure of the concrete slab  11  tapers continuously to the surface  10 . The concrete border regions  130  are correspondingly stable under loading.  
         [0058]      FIG. 6  illustrates a plan view of three precast concrete slabs  11 ,  11 ′ and  111 , two of which have been joined to one another and one of which is to be joined. The precast concrete slabs  11 ,  11 ′,  11 ″ correspond to the exemplary illustrated in  FIG. 5 . The precast concrete slabs have the width of the grooved floor which is to be produced and have a standard length, with the result that the individual grooved-floor concrete slab is still easy to handle and transport as a precast unit. The floor length required for the barn which is to be fitted out is formed by joining a corresponding number of precast concrete slabs to one another in the longitudinal direction.  
         [0059]     In order to ensure accurately fitting alignment of the slabs which are to be joined to one another, fitting elements  17  and  18  are alternately formed on the end sides  160  of the precast concrete slabs  11 ,  11 ′,  11 ″. In the exemplary embodiment illustrated, the fitting elements comprise protrusions  17  arranged on one end side of the slab and sockets  18  aligned therewith on the other end side.  
         [0060]      FIG. 6  illustrates the precast concrete slabs  11 ′ and  11 ″ in the already joined-together state. The fitting elements, which are no longer visible on the surface, are illustrated by dashed lines at the joining edge. Furthermore, the precast concrete slab  11  is illustrated before being joined to the precast concrete slab  11 ′. Correspondingly, it is possible to see the protrusions  17  on the end side  160  of the precast concrete slab  11 . Sockets  18  provided for the protrusions  17  are represented by dashed lines in the associated end side  160  of the precast concrete slab  11 ′.  
         [0061]     A preferred groove division can also be seen in plan view in  FIG. 6 . The grooved floor has a total of twelve grooves  15 , which are each arranged as six equally spaced-apart grooves on both sides of a central concrete part  19 . The central part  19  serves as a stable bearing means for the mucking rake, which can be moved back and forth by a push rod. Furthermore, in each case one side strip  20  is formed on the outside, this likewise merely having a concrete surface, that is to say no accommodating depression for asphalt.  
         [0062]      FIG. 7  illustrates a cross section, in detail form, of an alternative embodiment of a grooved-floor concrete slab  21 . The precast concrete slab  21 , in the same way as the previous exemplary embodiment, has an accommodating depression  22  between adjacent grooves  25 . However, the accommodating depression  22  has a rectangular cross section. This accommodating depression  22  is likewise filled with an asphalt covering  24 .  
         [0063]     On account of the rectangular accommodating depression  22 , the concrete border region  23  has vertical flanks on both sides. A reinforcing steel member  26  is cast in the concrete in order to reinforce the border region  23 .  
         [0064]     It is particularly important for the cubicle-barn arrangement according to the invention to be used with a bedding of straw and for straw manure and liquid manure to be separated during mucking.  
         [0065]     As is known from age-old livestock-keeping traditions, straw helps to bind the animals&#39; feces and increases the well-being of the animals. The arrangement according to the invention easily achieves the situation where liquid manure and solid manure can be discharged in an automated manner by conventional slide systems, the arrangement allowing the liquid and solid constituents to be separated to the greatest extent. The straw manure is an ideal soil fertilizer in particular for agricultural land. The organically high-grade and non-toxic fertilization using the straw manure produced in accordance with the arrangement and method activates the soil life of the fertilized pasture and/or tilled land. The soil becomes more fertile.  
         [0066]     In addition to using straw as bedding, it is also possible to use wood shavings and/or sand, which, as organic or mineral constituents, further increase the quality of the manure and additionally allow the buffer-storage of moisture.  
         [0067]     In addition to providing improved animal health, the arrangement according to the invention and the associated livestock-keeping method are used to produce an organically high-grade soil fertilizer which results in permanently more productive soils. The yield harvested from the land is much easier to balance against the amount of fertilizer used. There is both an ecological advantage and an economic advantage in using the invention in agriculture. The invention may also be advantageously utilized by extensive, ecological or so-called “bio” farms.  
       List of Designations  
       [0000]    
       
           1  Grooved floor, walkway floor  
           10  Walkway-floor surface  
           100  Cubicle barn  
           101  Cubicle  
           102  Walkway passage  
           103  Gate  
           104  End wall of barn  
           11  Load-bearing structure, concrete slab  
           111  Pouring level  
           12  Channel  
           120  Accommodating depression  
           13  U-profile  
           130  Concrete border region  
           131  Base  
           132  Leg  
           133  Top edge  
           134  Connecting element, flat iron bar  
           135  Drainage bore  
           14  (Asphalt) covering  
           15  Groove  
           16  Head end  
           160  End side  
           17  Protrusion, fitting element  
           18  Socket, fitting element  
           19  Central concrete part  
           20  Side strip  
           21  Precast concrete slab  
           22  Accommodating depression  
           23  Concrete border region  
           24  Asphalt covering  
           25  Groove  
           26  Reinforcing steel member  
           200  Mucking system  
           210  Pulling or pushing element  
           220  Rake  
           221  Tine, extension  
           222  Movement direction  
           3  Liquid-manure pit  
           31  Slatted floor  
           4  Interim manure store

Technology Classification (CPC): 0