Online structural engineering · CYPE · SAP · Tekla
Online structural engineer by the hour or by project
Concrete, steel, timber and composite. Calculation reports, reinforcement drawings and CTE compliance checks ready for permit submission. A remote service for architects, engineers, developers and contractors across Spain.
What it is
What is an online structural engineer and how does it work?
An online structural engineer is an engineer specialised in structural analysis and design who works remotely on your projects. They receive the architectural drawings, model the structure in CYPECAD, SAP2000 or Tekla, size every element (columns, beams, floor slabs, foundations) and deliver a calculation report plus reinforcement drawings ready for permit submission.
Without hiring an in-house engineer, without software licence costs, without paying holidays or social-security contributions. You only pay for the calculation when you need it. Ideal for architects who outsource the technical side, developers with a single project and engineering firms with workload peaks.
Structural frame · example
Services
Everything we calculate
The 4 main materials (concrete, steel, timber and composite), every structural typology (foundations, floor slabs, frames, roofs) and the complete documentation ready for permit submission. More than 20 services covered by the same team.
Architecture and building
Plans, elevations, sections and details for housing, public facilities and refurbishments.
- Material
Reinforced concrete structures
Columns, beams, slabs, floor slabs, foundations. Reinforcement drawings and quantities.
- Material
Steel structures
Trusses, frames, industrial units. Welded and bolted connection details.
- Material
Timber structures
Roofs, lightweight framing, CLT. Connection and fastener details.
- Material
Reinforcement details and quantities
Bar schedules, reinforcement tables, lap and splice lengths.
Industrial layouts
Warehouses, industrial estates, machinery layout and process zoning.
Civil engineering · roads
Longitudinal and cross profiles, typical sections, pavements and drainage.
Urbanisation and networks
Sewerage, lighting, water supply, telecommunications, pavements and street furniture.
Electrical installations
Single-line diagrams, distribution boards, distribution, lighting and power.
Plumbing and drainage
Cold/hot water networks, waste, DHW and sanitary fittings.
HVAC air conditioning
Ducts, equipment, returns, heat recovery units and grilles.
Fire protection and gas
Fire hose reels, detection, escape, fire compartmentation and gas networks.
BIM modelling in Revit
Parametric 3D model with families, views and automatic quantities.
BIM coordination across disciplines
Navisworks clash detection, model federation and phased reviews.
Surveys · existing condition
On-site digitisation, photogrammetry, vectorising from photographs or paper.
Documentation for permits
Drawings for opening licences, minor works, change of use and municipal applications.
Refurbishment and rehabilitation
Existing condition / refurbished condition, demolition and new works overlaid.
Construction details
Façade, roof, joinery and structure at 1:5 / 1:10 / 1:20 scale.
Vectorised topography
Topographic bases in DXF/DWG, contour lines and UTM coordinates.
Quantities from drawings
Areas, lengths, volumes and items for BC3 or Excel.
Do you also need CAD/BIM drafting? See our online draughtsman service.
When to hire one
When do you need an online structural engineer?
Architects and developers call us in very specific situations: a project needs a permit and they have no in-house structural engineer; a client demands seismic analysis before signing; an existing building shows signs of damage and needs assessment and a reinforcement proposal.
We also work with contractors who need to reinterpret a previous calculation, with owners who want to add storeys to an existing dwelling and with engineering firms whose workload has overflowed.
If you have no in-house structural engineer, if yours is overloaded or if you simply prefer not to grow your fixed structure for a one-off commission, the online structural engineer model fits. And if you have steady demand, our monthly hour packs give you capacity on demand.
The result: rigorous calculation, documentation ready for permit submission and a backup structural engineer whenever you need one.
Video testimonial
“To take some weight off and have documentation that’s of high quality.”
Zacarías Grande · D-LINIEX client
Because improving doesn’t always mean growing your structure. Sometimes it means leaning on better support.
How it works
From architectural drawings to calculation report
01
You send the architectural drawings
DWG/PDF, location, building use and geotechnical report if you have one. Within 24h we confirm feasibility and price.
02
Modelling and preliminary sizing
We build the model in CYPE/SAP, define load cases, geometry and seismic zones.
03
Calculation and verification
ULS/SLS analysis, CTE/EHE/EAE checks, optimisation of quantities and reinforcement.
04
Report + drawings + revisions
We deliver the CTE calculation report, reinforcement drawings and schedules. Revisions for client-side changes are quoted separately.
Software and deliverables
CYPECAD, SAP, Tekla. The industry standard.
We work with CYPECAD & CYPE 3D for most building projects. The CYPE suite covers concrete, steel, timber and composite with the CTE/EHE codes built in.
For advanced analysis —long-span roofs, complex three-dimensional frames, modal seismic analysis— we use SAP2000, Robot Structural or Tekla Structural Designer. For critical steel connections: Idea StatiCa.
We deliver: CTE calculation report, reinforcement drawings in DWG/PDF, quantity schedules, element lists, the native CYPE model if you need it, and code-compliance check reports.
+ over 20 structural calculation programs in our stack
AutoCAD
AutoCAD Civil 3D
AutoCAD Plant 3D
AutoCAD MEP
AutoCAD Electrical
Revit
Navisworks
Fusion
3DS Max
Recap
ArchiCAD
Allplan
MicroStation
SketchUp
Solidworks
Solid Edge
Inventor
Catia
PTC Creo
Siemens NX
TopSolid
Tekla
CYP
Eplan
SEE Electrical
CADWorx
CadWork
ArcGIS
QGIS
Faro Scene
Adobe InDesign
Microsoft Project
Excel
Power BI
If your firm works with other software (or you need BIM integration with Revit), we adapt.
How we quote
By the hour or by project. Quote tailored to you.
We offer two arrangements to fit the way you work:
- ·Fixed quote per project. For commissions with a defined scope. We tell you the price before we start and it doesn’t change unless an agreed scope change occurs.
- ·Hour pack. From 5h. Ideal for one-off reinforcements, assessments, checks or advice without a full project.
Some indicative orders of magnitude:
- Single-family home calculation · concrete600–1.200€
- Industrial unit calculation · steel1.200–3.500€
- Localised structural reinforcement400–900€
- CTE DB-SE report · code compliance check500–1.500€
- Assessment + structural damage diagnosis350–900€
These are only indicative orders of magnitude. Each project is quoted to measure based on scope, complexity and seismic zone. Reply within 24h.
Video testimonial
“The clarity and understanding of the whole team is real backup.”
Jesús López Orozco · D-LINIEX client
We started leaning on a technical team that understood our needs.
Coverage
Structural engineer for the whole of Spain
Our office is in Cáceres (Extremadura), but we calculate structures for projects in every province of Spain. The national CTE code applies the same; only the local parameters change (seismic zone, wind loads, snow), which we already have catalogued.
For projects in relevant seismic zones (Granada, Murcia, Alicante, Almería), we apply NCSE-02 with modal analysis and inter-storey drift checks. For extreme wind or snow zones, we adjust the coefficients per CTE DB-SE-AE.
Does your project also need CAD/BIM drafting or AI-powered code compliance checks? We offer the complete service from a single company, with no external subcontractors.
Video testimonial
“The project comes out just as well, but it takes me half the time.”
Federico Araujo · D-LINIEX client
That lets me take on more commissions without stressing over impossible deadlines.
Why D-LINIEX
Why choose us as your structural engineer
Quote within 24h
A fast response with a fixed price, no estimates that spiral at the end of the project.
Every code covered
CTE, EHE-08, EAE, NCSE, Eurocodes and regional regulations. Calculation ready for permit submission.
Industry software
CYPECAD, SAP2000, Tekla, Idea StatiCa. No learning curve, no licence cost for you.
No fixed cost
No payroll, no hiring a structural engineer. You pay for the project when you need it, no strings attached.
4 materials · 1 single technical office
Concrete, steel, timber, composite
Reinforced concrete
Foundations, columns, beams, floor slabs. We specialise in single-family homes and multi-family buildings. Calculation per EHE-08, NCSE-02 and CTE DB-SE.
Steel
Industrial units, frames, roofs. Hot-rolled and cold-formed steel. Checks per EAE.
Composite
Concrete + steel, timber + steel. Composite beams and collaborating slabs for projects where a single material isn’t enough.
Timber and CLT
Traditional roofs, lightweight framing, CLT panels for new builds. Very useful in heritage refurbishment.
Reference dossier
Request our dossier of calculated projects.
We send you a PDF with calculation reports, reinforcement drawings and technical sheets of real projects: single-family homes, multi-family buildings, industrial units, heritage refurbishment and civil engineering.
CTE report · Structural Safety · 9.5 MB · PDF
Your complete technical office · tailored quote
CAD drafting, BIM, calculation, quantities.
We don’t sell off-the-shelf packages — every project is different. We prepare a tailored quote for you, whether by the hour or at a fixed price, whichever suits you best.
Outsourced technical office
Two arrangements, the same team.
By the hour
Ongoing flow
- Agreed hourly rate
- Weekly timesheet
- Real-hours tracking — no surprises
- Real-time access to the project dashboard
Fixed price
Closed commission
- Agreed scope, deadline and price
- Defined delivery milestones
- Revisions included
- Ideal for projects with a well-defined scope
Available services
Structural calculation
EHE-08 · Eurocodes
BIM modelling
Revit · IFC
CAD drafting
DXF · DWG
Quantities
BC3 · budgets
Technical reports
CTE + regional
Project drafting
Schematic + construction
Getting to know each other matters
Call us and we’ll set up a video call.
Before quoting we want to properly understand your project and your team. A short call + video conference gives us enough context to send you a realistic quote and a credible work plan.
Frequently asked questions
What people ask us most.
What types of structures do you calculate?
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We calculate the four main materials: reinforced concrete, steel, timber (including CLT) and composite (a combination of the above). We do single-family homes, multi-family buildings, industrial units, heritage refurbishment and civil engineering structures.
Do you sign and certify the calculation report?
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No. We are a technical calculation service. The report and drawings are always signed by the competent professional (architect, industrial or civil engineer…) leading the project. We provide all the technical documentation ready for permit submission.
Do you use CYPE, SAP or other software?
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We work mainly with CYPECAD and CYPE 3D for buildings, and with SAP2000, Robot Structural Analysis or Tekla Structural Designer for more complex cases. For steel connections we use Idea StatiCa and Cype Connect. We also hand over the model if you need it.
Does it include seismic analysis per NCSE?
+
Yes. Every structure in a relevant seismic zone includes analysis per NCSE-02 (or NCSE-94 where applicable) and the corresponding coefficients. If your project is in Granada, Murcia, Alicante or any zone with significant basic acceleration, seismic analysis is automatic.
What do I need to send you to get started?
+
Ideally: architectural drawings (DWG or PDF), a descriptive report with the building use, location (for climate, seismic and wind-load zoning) and a geotechnical study if you have one. If you don’t have a geotechnical report, we quote with conservative values until you do.
Do you also calculate reinforcements and structural refurbishment?
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Yes. Floor-slab strengthening with FRP, carbon fibre, overlays, functional column replacement, foundation strengthening, etc. Also damage diagnosis for existing buildings with structural problems.
Do you work with specific regional regulations?
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Yes. We apply the national CTE DB-SE plus regional regulations (ITE in Catalonia, DT-CSE in Andalusia, etc.) and Eurocodes when the project requires them. If the area has specific regulations for loads, wind or seismic, we incorporate them automatically.
Do you have professional indemnity insurance?
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Yes. Although we don’t sign the project (the client’s professional does), our company holds professional indemnity insurance for the technical services we provide.
Fixed quote within 24h
Have a project to calculate?
Send us the architectural drawings and a description of the use, and we’ll send back a fixed price before the day is out. No obligation.