For designers the limits of the element, before you draw the grid
This page gathers what architects and structural engineers look for first: product limits, execution tolerances, transport requirements and the scope of the documentation they receive from us. Every number comes from the product pages and declarations of performance — there are no estimated values here.
What decides how the volume is split into elements
The values are taken straight from the product pages, so they cannot drift apart from the catalogue. The product name leads to the full specification with standards, tables and declarations.
Solid walls
Product page- Maximum element dimensions
- 3,85 × 9,00 m
- Element thicknesses
- 10, 12, 15, 18, 20 and 24 cm
- Factory-fitted features
- Cast-in electrical boxes and conduits, window and door openings
Two-layer walls
Product page- Maximum element dimensions
- 3,85 × 9,00 m
- Insulation thickness
- Up to 300 mm
- Fire resistance
- R60–R240, EI30–EI60
- Element weight
- Approx. 270–355 kg/m² with a 15 cm structural leaf (LC20/22 – C20/25); insulation adds 2–6 kg/m²
Sandwich walls
Product page- Maximum element dimensions
- 3,85 × 9,00 m
- Insulation thickness
- Up to 300 mm, to the investor's specification
- Fire resistance
- R60–R240, EI30–EI60
- Element weight
- Approx. 435–520 kg/m² with a 15 cm structural leaf and 7 cm facade layer (LC20/22 – C20/25), excluding insulation
Filigree slabs
Product page- Element width
- ≤ 2,50 m
- Slab length
- < 12 m
- Total floor depth
- 14–40 cm
- Element weight
- Approx. 125 kg/m² at 5 cm thickness
Solid floor slabs
Product page- Slab width
- Up to 2.40 m
- Fire resistance
- R60–R240
- Sound insulation Rw
- Up to 50 dB
- Temporary propping
- Not required
Beams and columns
Product page- Weight
- Reinforced concrete at 25 kN/m³: 30 × 30 cm column approx. 225 kg/m, 40 × 40 cm column approx. 400 kg/m, 30 × 60 cm beam approx. 450 kg/m
- Concrete classes
- C20/25, C30/37, C35/45, C50/60
- Harmonised standard
- EN 13225:2013
Precast balconies
Product page- Maximum element dimensions
- 3,0 × 9,0 m
- Element thickness
- Above 18 cm
- Slab weight
- Approx. 450 kg/m² at 18 cm thickness; reinforced concrete at 25 kN/m³ per EN 1991-1-1
- Shapes
- Rectangular, polygonal, rounded, trapezoidal
Precast stairs
Product page- Riser height
- From 15 to 22 cm
- Going (tread length)
- From 21 to 32 cm
- Stair waist thickness
- From 20 to 35 cm
- Flight width
- Up to 160 cm
We do not require a model — you receive one
For a quote, dimensioned plans, sections and elevations in PDF or DWG are enough. The model is built here in Tekla Structures, on every order, and the client receives from it an IFC file in LOD 400, layout plans, formwork and reinforcement drawings and steel schedules. If you work in BIM and hand over an IFC, you shorten our work and reduce the risk of error when transferring geometry — but it is not a condition.
Service clashes show up on screen before an element reaches the production table. The full scope of the documents we hand over and the moment of the design freeze are described on the Delivery standard page.
The trailer is part of the design
A standard load carries elements up to 8.5 metres long and 2.40 metres wide, with a load of up to 21 tonnes. An element larger than the mould or heavier than the load is not impossible — it is an abnormal load with its own permit and its own price. It is worth testing the element split against these limits at concept stage rather than in detailed design.
On site, access is what counts: a paved road at least 4.5 metres wide and room for the crane. We erect straight off the trailer, so no storage area is needed — but the site has to be driveable. The conditions and lead times are collected in the delivery standard.
Tolerances, fire and acoustics
Dimensional deviations are assessed against EN 13369, EN 13670 and ISO 7976; the permissible values are published, so acceptance rests on the same table on both sides. A junction detail can then be designed for real rather than hoped-for accuracy.
Layered walls reach fire resistance of R60–R240 and EI30–EI60 and airborne sound insulation Rw of up to 50 dB; a 210 mm wall was measured at 54 dB. REI classes for individual thicknesses are given in the tables on the wall pages, and harmonised standards and factory production control certificate numbers on the Compliance and certificates page.
Four questions from the first meeting
Answers from the product pages, our terms of business and the practice of the Formee design office.
- Do I have to design in BIM to work with Formee?
- No. For a quote, dimensioned plans, sections and elevations in PDF or DWG are enough. Modelling is done here in Tekla Structures — on every order — and that model produces the shop drawings, reinforcement schedules, erection plans and the IFC file for the client. An IFC model from the designer shortens our work but is not a condition of working together.
- How large can a single element be?
- Walls up to 3.85 × 9.00 metres, filigree slabs up to 2.50 metres wide and under 12 metres long, solid floor slabs up to 2.40 metres wide, balconies up to 3.0 × 9.0 metres. The upper limit is set not only by the mould but by transport: a standard load carries elements up to 8.5 metres with a load of up to 21 tonnes.
- When does the design have to be frozen?
- When the shop documentation is approved, before production starts. It is the only date that splits changes into free and costly — before it we correct the geometry without consequence, even for a large change. After it, every correction touches elements already in the production plan.
- What do the designer and the client get from our model?
- An IFC file in LOD 400, layout plans with element positions, formwork and reinforcement drawings for each element, steel schedules, erection plans and the erection manual. At handover, declarations of performance for the delivered batch and factory production control certificates are added.
Send us your project — we'll prepare a quote
Dimensioned floor plans, sections and elevations plus the project location. Element selection and a quote in around a week.