Filigree slabs: when is temporary propping needed?
How span, panel thickness, lattice girders and construction loads decide temporary propping, and what it takes to design a self-supporting slab.
NT-01 · REV 0In preparation
Nariman — Concrete Engineering & Industrial IntelligenceChapter 01 — Structural Systems
01 Structural Systems
Precast & Prestressed Engineering
Engineering the Future of Concrete
Concrete is where we begin. Technology is how we move forward.
Nariman is a concrete engineering and technology company. Precast engineering, Digital Twin, AI & software, and concrete R&D work as one practice: from the material, to the element, to the structure and its data.
Column-to-pocket-foundation jointHigh-strength grout · starter bars · tolerance ±5 mm
Beam-to-Column ConnectionCorbel or engineered connection designed to minimize on-site formwork
PRECISION-BUILT STRUCTURAL SYSTEMSFactory precision, delivered on site
Columns
Beams
Filigree slabs
Prestressed elements
01 / PRECAST & PRESTRESSED SYSTEMS
From Engineered Components to Complete Structures.
Nariman develops engineering solutions for precast and prestressed concrete systems—from individual components and connections to complete structural systems.
- Design
- Factory Production
- Transport
- Erection
- Complete Structure
01/ 07
Setting out & foundations
The structural grid is set out on site.
Setting out the axes and casting the pocket foundations
Nariman / Industrial productionChapter 01 — The factory
01 Precast production
From the production line to the site.
One precast beam, from drawing to erection, in eight stations.
Precast beam B-01L = 6.00 m · h = 60 cm · b = 40 cm · C45/55
Tensioning the prestressing strands4 × Ø15.7 mm · 0.75 fpu · 140 kN per strand
Steam curing60 °C · 12 h · stripping strength ≥ 25 MPa
Quality control — passdimensions ±3 mm · cover 35 mm · fc = 48 MPa
Seated on the column corbelSame B-01 · dry joint · minimal on-site formwork
01/ 08
Design
Software first, then the mold.
A shop drawing and a unique ID for every element
Nariman / Digital TwinChapter 02 — Digital Intelligence
02 Digital Intelligence
Digital Twin & Smart Factory
From Physical Assets to Operational Intelligence.
Nariman Digital Twin connects real-world data from factories, equipment, concrete components, and structures with digital models, simulation, and engineering analytics—providing visibility into current conditions and supporting better-informed decisions.
- Physical Asset
- Data
- Digital Twin
- Simulation
- Prediction
- Optimization
- Decision
SCANNING · geometry & element IDs000% · 0 elements
Connection node · C-3-1-3ID 3F-C01 · installed 2024-12-02 · bolt torque: verified
Deflection sensor · B-1-x-1-2δ = 4.2 mm · L/360 OK
Support · shear demand / capacityD/C = 0.42 · OK
01/ 03
Scan & capture
See what is happening.
Every element gets a digital identity: geometry, concrete properties, test results and location
03 Engineering Software
Design, Analysis & Decision Tools
Turning Engineering Knowledge into Digital Tools.
Nariman develops specialized software for the design, analysis, system selection, optimization, and management of concrete and structural engineering processes.
00:00since casting
0.0 MPastrength now
Early-strength predictionMaturity method, calibrated on the plant's own cube tests
Waiting for the prediction…
Strip the mold at14:20Predicted 25.4 MPa — three hours ahead of a fixed cycle
0006121824
Cast 02:40Steam curingStrip 14:20
DispatchThu · truck 2
Worked example · Beam B-01 — when can the mold come off? · Illustrative figures
01/ 03
Reading
The beam reports as it cures.
Bed temperature and concrete maturity, logged every few minutes
Software & AI
From designing a prestressed section and evaluating floor systems to production planning and factory analytics, we transform complex engineering problems into practical, scalable digital tools.
Specialized software for the analysis, design, and optimization of structural systems and sections.
Current product
Prestressed Joist Design
Specialized software for the analysis, design, verification, and optimization of prestressed joist sections based on section geometry, span, loading, material properties, and prestressing parameters.
Explore the joist design softwareFrom Designing a Section to Optimizing a Factory.
Nariman SoftwareNariman / Research, development & innovationChapter 04 — Research & Innovation
04 Research & Innovation
Concrete R&D
Engineering the Next Generation of Concrete.
R&D at Nariman focuses on materials, products, and systems that can improve the structural performance, resource efficiency, constructability, and sustainability of concrete.
Column C-2-3-0 · concrete surface×40 magnification · 1.2 × 1.2 cm section
Aggregate & cement pasteContinuous grading · w/c ratio 0.32
Steel fibersØ 0.2 mm · L = 13 mm · 2% by volume
Advanced materialsUHPC · SCC · lightweight concrete
Low-carbon concreteSCMs · clinker reduction · recycled materials
Advanced prestressingLong spans · optimized sections
Industrialized constructionFiligree · modular · connections
AI for concreteMix optimization · strength prediction
ONE CONCRETE ECOSYSTEM
Four disciplines, one story.
- Material
- Component
- Structure
- Factory
- Data
- Intelligence
- Innovation
01/ 03
Concrete microstructure
Innovation starts in the microstructure.
Aggregate, cement paste and fibers under magnification
Research & Innovation
Advanced Concrete Materials
- UHPC
- SCC
- Lightweight Concrete
High-performance, self-compacting and lightweight mixes for slimmer, more durable elements that are easier to cast.
Low-Carbon Concrete
- SCMs
- Clinker reduction
- Recycled materials
- CO₂ reduction
Lowering embodied carbon while meeting strength, durability and production-cycle requirements.
Advanced Prestressing
- Long-span
- Optimized sections
- Material efficiency
Longer spans and leaner sections from the same strand and concrete.
Industrialized Construction
- Filigree
- Modular systems
- Advanced connections
Systems and connections designed for factory production and fast, controlled erection on site.
AI for Concrete
- Mix optimization
- Strength prediction
- Quality prediction
Models built on mix, production and test data to support mix design and predict strength and quality.
Precast columns & beamsFiligree slabsHollow-core slabsPrestressed elementsPrecast wallsModular buildingsDigital TwinEngineering softwareStructural monitoringConcrete R&D
05 Engineering
Products & structural systems.
Every product ships with an ID, shop drawings and a quality record. Connection design and the erection plan are part of the product itself.
- 01
Precast column
Single- and multi-story columns with integral corbels for dry beam connections.
- Section
- 40 to 80 cm
- Height
- Up to 4 stories in one piece
- Base connection
- Pocket or base plate
- 02
Precast beam
Rectangular, L and inverted-T beams — reinforced or prestressed, with ledges for the slab.
- Span
- 6 to 18 m
- Section
- Rectangular · L · inverted T
- Prestressing
- Pre-tensioned
- 03
Precast wall
Load-bearing, shear and façade panels; solid, or sandwich with an insulated core.
- Thickness
- 15 to 30 cm
- Type
- Solid · sandwich · façade
- Connection
- Welded or mechanical
- 04
Hollow-core slab
Prestressed hollow-core slabs for long spans and fast floor erection.
- Span
- Up to 16 m
- Thickness
- 15 to 40 cm
- Weight
- Up to 50% lighter than a solid slab
- 05
Filigree slab
A semi-precast slab with lattice girders: the panel and bottom reinforcement come from the factory, the panel stays in place as permanent formwork, and the cast topping makes the slab monolithic.
- Panel thickness
- 5 to 7 cm
- Final thickness
- 18 to 30 cm
- Formwork
- No conventional slab formwork
- Temporary propping
- Reduced or eliminated, depending on panel design and span
- 06
Box modular building
Complete volumetric units: structure, walls, floor and services finished in the factory and simply stacked on site.
- Unit size
- Up to 3.6 × 12 m
- Use
- Residential · hospitality · healthcare
- Installation
- A few days
Which system does your project need? Send us the drawings and we'll review the options together.
Request a technical review06 Projects
Every project calls for its own system.
System selection starts from the building's use, spans, loading and schedule. Four main project types, and the systems typically used in each:
Industrial & logistics buildings
Long spans, crane loads and tight schedules: a precast frame with prestressed roof beams and hollow-core slabs.
Typical systems
Select a system to find it in the drawing.
Case studies and their technical documentation are being prepared for publication.
Discuss your project07 Insights
What we learn, we publish.
Technical notes on precast and prestressed systems, Digital Twin, engineering software and concrete technology.
Demand/capacity: a common language for structural monitoring
Why “percent of stress” is an ambiguous measure, and how the D/C ratio ties sensor readings back to design criteria.
NT-02 · REV 0In preparationMaturity method or machine learning?
Estimating early-age strength with the maturity method (ASTM C1074), and where data-driven models genuinely add to it.
NT-03 · REV 0In preparationLess clinker, same production cycle?
Supplementary cementitious materials, early strength for stripping, and what they mean for the precast production cycle.
NT-04 · REV 0In preparation
08 About Nariman
Where Concrete Engineering Meets Technology.
Nariman is an engineering and technology company focused on the concrete industry. Our work spans precast and prestressed structural engineering, Digital Twin systems, specialized software development, and concrete technology R&D.
One principle connects them all:
Turning engineering knowledge, data, and technology into practical solutions.
- Mission
- To develop solutions that make the concrete industry more industrialized, more intelligent and more sustainable.
- Vision
- To build a bridge between traditional concrete engineering and the new generation of digital technology and industrialized construction.
Nariman at a glance
- 15+yearsof experience in the precast and prestressed concrete industry
- 4disciplinesPrecast engineering, Digital Twin, AI & software and concrete R&D, in one engineering company
09 Let's build
From concrete components to intelligent buildings.
Concrete engineering, technology and innovation — one integrated path to building a better future.
To get started
Send architectural and structural drawings,
the intended use and your expected schedule.
Topics
Precast frames, filigree and hollow-core slabs, prestressed elements
Digital Twin, engineering software, concrete R&D