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Calculadora Estrutural

Travelling and Temporary Circus Structures
Open access — no access code is required to use the calculator

⚠️ Aviso: Esta ferramenta é auxiliar de cálculo. A responsabilidade técnica pelos resultados e laudos é exclusivamente do Engenheiro Responsável Técnico habilitado que assina o documento.
Acesso liberado a todos os usuários.
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STRUCTURAL ENGINEERING

Travelling Circus Structural Calculator

Preliminary structural screening based on EN 13782:2015, EN 1990, EN 1991-1-4, EN 1993-1-1 and EN 1993-1-3. Enter the installation data and obtain a traceable screening of the stated elements.

NOTE / Professional responsibility: This calculator is an auxiliary preliminary-sizing tool. Technical responsibility for calculations, results and reports rests exclusively with the competent structural engineer appointed under the rules of the installation country. camposlh.com is not liable for damages, losses or consequences arising from use of the information generated here.
EN 13782:2015 EN 1990 EN 1991-1-4 EN 1993-1-1 EN 1993-1-3
Schematic front elevation
CamposLH › Travelling Circus Structural Calculator
Report identification / input 01

Project and responsibility record

Complete the project identification and professional-responsibility record before issuing the technical memorandum.

Project input required

Issue the Project Information Form to obtain the project information, site records and responsible-party data required for the technical memorandum.

OPERATOR / 01 Circus operator record

ENGINEER / 02 Engineer of Record

Documentary record

Circus Images (Optional)

Add one primary image for identification and up to six captioned detail images for the dedicated photographic-record page in the technical report. Without uploads, the standard report layout is retained.

IMAGE / 03 Primary circus image

Inserted on the cover and in the report identification section.

Recommended resolution: at least 1200 × 800 px (landscape).
Technical-report size: 170 × 80 mm (full page width).
Accepted formats: JPG, PNG, WEBP. Maximum file size: 5 MB.
IMAGE INPUT 01
Select image file or drag the image here

IMAGE / 04 Detail images (up to 6)

Inserted on the dedicated photographic-record page in the technical report.

Recommended resolution: at least 800 × 600 px.
Technical-report size: 85 × 60 mm each (2×3 grid, up to six images).
Accepted formats: JPG, PNG, WEBP. Maximum: 5 MB per image.
IMAGE INPUT 02–07
Select image files — up to six detail records
Installation location

Circus Installation Site

Search the installation address to obtain coordinates, position the canopy on the map and select the nearest European wind context automatically.

SITE / 05 Installation address

SITE / 06 City and site reference

Map position

Installation Position on Map

Mark the canopy location. The scaled layout is inserted into the technical report as a location figure.

Drag the map to navigate and use the mouse wheel or +/− buttons to zoom. Double-click to mark the canopy position; drag the marker for fine adjustment. The canopy is fixed to the terrain at the stated real-scale diameter to help check installation space and clearances.

Circus Classification and Location

Select the circus configuration and installation context. The calculator applies initial planning values that remain editable for the specific project.

CONFIG / 07 Capacity and audience

Grandstand: steel structure with structurally checked beams and cross frames.
Arena: radial beams supported on cross frames, with a 20 mm marine plywood deck.
Used to check the occupancy load assumption for the seating structure.
EN 1991-1-1 reference occupancy value. Confirm category and National Annex for the actual installation.
4 masts: common configuration for medium and large circuses. Tent diameter 30–45 m.

WIND / 08 Site and wind input (EN 13782 / EN 1991-1-4)

The location applies an automatic preliminary wind value. It remains editable for the final project condition.
Select a country and representative city/region to apply a preliminary wind value automatically.
Automatic wind-value traceability (optional)
The selected category is used by the EN 1991-1-4 preliminary qp(ze) model below; no S₂ factor is applied in this edition.
Input Data

Circus Technical Parameters

Initial parameters are populated from the selected circus configuration. Adjust them for the specific project condition.

SEATING / 09 Grandstand

Angle relative to the vertical. Axial force per bar = NEd/(2·cosθ) — the force INCREASES as the angle increases. 30° is the upper-bound value for the typical range; use the actual project value when known.
Fundamental persistent/transient ULS screening combination. Confirm National Annex factors.

⛺ Canopy and Wind

Provide canopy fire-performance documentation under the applicable national fire-safety rules. Self-weight is adjusted automatically.
Leave as 0 to use the automatic preliminary EN wind model. A verified project value, when available, takes precedence.
Use the height stated in the wind study for the imported qp(ze) value.
No imported study record. The automatic preliminary model is active.
Accepted local file format
JSON example: {"qp":0.82,"ze":10,"source":"Wind study","reference":"WS-014","nationalAnnex":"UK NA","date":"2026-08-11"}. CSV/TXT also accepts qp;0.82, ze;10, source;…, reference;… and nationalAnnex;…. The Engineer of Record confirms that the imported record is applicable to the site.
Run the calculation to see the automatic wind action and the governing value used by the preliminary model.
Total straps = number of masts × straps per mast. Typical range: 4–8 straps per mast.
WLL = Working Load Limit. BS = Breaking Strength. Webbing selection is recorded against EN 12195-2 and the manufacturer certificate.

⚓ Masts and Cables

EN 10025 S355: structural steel grade, fy = 355 MPa = 35.5 kN/cm².
Breaking load from the selected manufacturer record; a minimum design safety factor of 3.0 must be confirmed by the Engineer of Record.

SUPPORT / 10 Lattice column and foundations

Preliminary profiles calculate an editable indicative screening capacity from stake geometry and soil input. They are not a substitute for an anchor test or geotechnical design.
Used only when Verified capacity is selected. Enter a site-tested or geotechnically verified design capacity.
💾 Circus profiles
📊

No calculation has been run yet

Complete the previous tabs and run the preliminary verification. Utilization ratios, element results, standards checks and the technical report are shown here.

EUROCODE / SCOPE — European standards and preliminary-verification scope

EN 13782:2015 – Temporary structures EN 1990 – Basis of structural design EN 1991-1-4 – Wind actions EN 1993-1-1 – Steel members EN 1993-1-3 – Cold-formed steel EN National Annex – location parameters
Summary

Utilization Ratios by Element

Detail

Results by Element

Diagnostics

Corrective Suggestions

Summary Table

Standards Checks