Rebar for Filigree Slabs
Lattice-girder mesh for semi-precast floors — B500B bar, mesh, lattice girders and couplers to DIN 488 / EN 10080, designed to Eurocode 2.
What Is a Filigree Slab and Why Does the Reinforcement Matter?
A filigree slab (German: Filigrandecke) is a semi-precast composite floor element. A thin precast concrete shell — typically 50–80 mm thick — incorporates a bottom mesh layer and a series of lattice girders (Gitterträger) projecting upward. The shell acts as permanent formwork; once positioned on falsework, in-situ concrete is poured over to reach the design slab thickness, usually 160–260 mm total.
The lattice girders perform two functions: they stiffen the thin precast shell during transport and erection, and they provide the shear connection between the precast layer and the in-situ topping once composite action is achieved. This means the geometry, weld quality and steel grade of the lattice girder directly affect the structural performance of the finished slab under Eurocode 2.
Products Supplied for Filigree Slab Production
- Lattice girders (Gitterträger) — upper chord, lower chord and diagonal web bars in B500A / B500B, welded to DIN EN ISO 17660. Standard panel heights 60–200 mm, custom lengths available.
- Bottom mesh panels — B500A welded mesh to DIN 488-4, standard panel size 6.0 × 2.3 m (Q and R types), cut to bespoke sizes.
- B500B straight bars — for additional edge reinforcement, openings and connection zones, 8–25 mm diameter.
- Rebar couplers — where continuous reinforcement is required across slab joints (e.g. at column heads), parallel-thread couplers dia 12–25 mm.
Lattice Girder Geometry & Selection Guide
Match girder height to your precast shell thickness and design slab depth.
| Girder height (mm) | Typical slab thickness (mm) | Upper/lower chord dia (mm) | Web diagonal dia (mm) |
|---|---|---|---|
| 60 | 140–160 | 8 / 6 | 5 |
| 80 | 160–180 | 10 / 8 | 6 |
| 100 | 180–200 | 10 / 8 | 6 |
| 120 | 200–220 | 12 / 10 | 6 |
| 150 | 220–250 | 14 / 10 | 7 |
| 200 | 260–300 | 16 / 12 | 8 |
Dimensions are indicative. Your structural engineer specifies girder geometry based on Eurocode 2 shear and deflection calculations for each project.
Why Source from Steel Rebar Germany
Full Certification Stack
Mill Test Certificate EN 10204 3.1, CE Declaration of Performance and weld qualification records for lattice girder supply — everything your precast quality system requires.
Matched Product Supply
Lattice girders, bottom mesh and supplementary bars from a single supplier — consistent steel grade, matched heat numbers and a single set of transport documents.
Export-Ready Packaging
Seaworthy bundles and panels, approximately 2 tonnes per lift, with full packing lists. Suitable for container or break-bulk shipment to any port worldwide.
Export & delivery →Related Products & Applications
Filigree slabs are typically used alongside other precast elements in the same structure. We supply the complete reinforcement package:
- Reinforcing steel mesh — standard Q/R panels for topping slabs and walls
- Lattice girders — full product range and technical specifications
- Rebar couplers — mechanical splices for column-to-slab connections
- All applications — precast, infrastructure, high-rise and more
Frequently Asked Questions
What steel grade are lattice girders supplied in?
What mesh type is standard for filigree slab bottom layers?
Can you supply lattice girders to custom lengths?
Do filigree slabs require additional topping reinforcement?
What documentation is provided for export shipments?
Source German-standard rebar with full export documentation
Tell us your filigree slab specification and destination port — we’ll respond with a detailed quotation.
