Staalgoed Handel B.V.


> Which concrete spacers do I need?
The height of the coverage determines which concrete spacers you need. If the coverage under slab reinforcement or reinforcing mesh must be 30 mm, you should therefore choose concrete spacer 30. Small spacers are especially suitable for placing under rebar cages. Large spacers are placed under reinforcing mesh.

> How many concrete spacers do I need?
The amount of spacers depends on the (floor) surface. You need 3 concrete spacers per square meter. This applies to all sizes of concrete spacers.

> How many spacers do I need for a rebar cage?
This depends on the length of the rebar cage and the type of spacer. For rebar cages, 3 concrete spacers per linear meter are placed at the bottom. Plastic spacers are placed on the side. For this you need 6 pieces per linear meter of reinforcement cage.

> I see that the concrete spacers have a narrow and wide side. How do I place the cubes?
The narrow side is the bottom of the spacer.

concrete spacer

>  I am going to pour a thick concrete floor and a single layer of reinforcing mesh will be placed in it. The reinforcing mesh must be at the top layer of the floor. How do I raise the mesh?
If you are going to pour a thick floor, for example 200 mm, and the reinforcing mesh must be at the top layer of the floor, we recommend using lattice girders. Make sure that there is also concrete coverage underneath the lattice girders (to prevent concrete decay from below).

Do not place the lattice girder on the ground or on the formwork. Use concrete spacer bars for this.

The order thus becomes:

  1. Place the concrete spacer bars
  2. The lattice girders will be placed on top of the concrete spacer bars
  3. Place the reinforcing mesh on the lattice girders
  4. Tie the reinforcing mesh to the lattice girders, to achieve that everyting stays in place when pouring the concrete.

lattice girders and concrete spacer bars underneath reinforcing mesh

> How should I overlap my reinforcing mesh? 
If you have mesh with flying ends, the length of the flying ends is the  lapping length corresponding to the diameter of that reinforcing mesh, plus one mesh size. You lay the next reinforcing mesh on the flying ends in such a way that you form a mesh with the two reinforcing mesh. This way, you don't have double reinforcement. Watch our instruction video.

For mesh without flying ends, there are two possibilities:

  1. Let the reinforcing mesh overlap 3 meshes.
  2. Lay the reinforcing mesh next to each other and connect them with loose bars. The length of the bars must then be 50x the diameter. Example: you have reinforcing mesh with a diameter of 8 mm. The length of the bars must then be 50x8=400 mm.

> What quality rebar do you supply?
The material we supply always meets the applicable standards and quality requirements. There are various classes of reinforcing steel (B500A, B500B and B500C). The class determines whether the steel is more suitable for certain applications and operations. The A, B and C do not indicate any difference in quality.

> I want to make a pergola from rebar. What should I order?
We supply materials for concrete reinforcement. The materials are produced according to the applicable standards. If materials are being used for visual work, take the following into account:

  • the dimensions can deviate ± 10 mm.,
  • the welds are a replacement for tying wire and not constructive,
  • bends will not always be exactly equal and perpendicular.

In our opinion, reinforcing steel is not a suitable material for making a rose arch, pergola or for use with a pond. If you nevertheless decide to order the construction of reinforcing steel, we need a drawing with all sizes and diameters to be able to make a proposal.

> How do I mount the supplied hooklinks/linkcages  to connect the reinforcement of the floor to the foundation?
The order of action depends on whether the concrete is poured in one go, or whether the foundation is poured first and after that the slab. It is also depends on the use of loose hook links to attach the floor reinforcement to the rebar cages of the foundation, or the use of link cages. For all cases a point-by-point description follows.

Two pours

  • mount rebar cages in the formwork of the foundation
  • attach loose hook links or a link cage to the rebar cages and adjust to the correct height
  • concrete pour of the foundation (after pouring, the hook links stick out of the concrete)
  • place the bottom mesh, lattice girders and top mesh
  • attach the upper mesh to the hook links
  • concrete pour of the slab

One pour and loose reinfocement/hooks links:

  • mount rebar cages in the formwork of the foundation
  • place the bottom mesh, lattice girders and top mesh
  • put hook links through the top mesh and mount them to the top mesh
  • pour the concrete
    Note: a disadvantage is that the hook is now in the upper cover.

One pour and link cages:

  • mount rebar cages in the formwork of the foundation
  • place the bottom mesh
  • mount lattice girders and link cages (usually there is an auxiliary bar on the link cage which makes it easier to mount on the rebar cage)
  • place the top mesh on the link cage and lattice girders
  • attach the top mesh to the lattice girders and the link cages
  • pour the concrete

> I see two different options on the site for a corner connection of rebar cages: a cage with bayonet and a solution with U-links. Which solution should I choose?
The corner solution with U-links can always be made and is the most flexible solution. Even if the corner is not right-angled, the rebar cages can be connected in this way in the corner.

Advantages of the corner solution with U-links:

  • more leeway, less precise dimensioning required
  • always applicable

Disadvantage of the corner solution with U-links:

  • more parts required for assembly

Advantage of corner solution with bayonet:

  • fewer parts required and therefore less assembly work

Disadvantage of an corner solution with bayonet:

  • dimensions must be precisely known, little leeway if the formwork turns out differently in practice
  • small chance of rejection during inspection

Watch  videos with assembly instructions for rebar cages here.

> The bill of materials shows straight bars/link cages. The 3D model shows bent bars/link cages. How is that possible? 

If all goes well, we had a telephone conversation about this when we were working it out. When concrete is to be poured twice in your project, it is more convenient to place straight bars or link cages. After the first pour and the placing of the first layer of reinforcing mesh, the bars or link cages must be bent. See also the short illustration below.



 In the bill of materials, therefore, there are straight bars or link cages. In the model they are bent.