Overhead and Gantry Crane Deflection Calculator

The overhead and gantry crane deflection calculator accurately calculates the vertical deflection of loaded girders, evaluates girder stiffness and structural performance by inputting lifting capacity, span, trolley weight and section parameters. This overhead and gantry crane deflection calculator also prevents rail gnawing, permanent deformation and unstable operation, and optimizes structural design and weight. Finally, it verifies whether deflection values comply with the limits set by ISO and FEM standards. Its calculation aims to ensure safe crane operation, reduce structural fatigue and extend service life.

Overhead Gantry Crane Deflection Calculator 01

Concentrated Load P (N)

Span Length L (m)

Moment of Inertia I (cm⁴)

Deflection (m)

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Overhead and Gantry Crane Deflection Calculator Formula

f = PL3 48EI

f: Maximum deflection (unit: m)
P: Wheel load (unit: N)
L: Main beam span (unit: m)
E: Elasticity modulus (unit: Pa, typically taken as 2.06 × 10¹¹ Pa)
I: Moment of Inertia (unit: m⁴)

Notes

In international standard calculations, the unit for the elastic modulus of steel is automatically converted to Pa.
The calculation results from the Crane Main Girder Section Moment of Inertia Calculator are in cm⁴, but are automatically converted to the SI unit m⁴ during the calculation process.
This overhead and gantry crane deflection calculator is primarily applicable to main girders with rectangular hollow sections.
The load used in this overhead and gantry crane deflection calculator is a concentrated load at mid-span (with the trolley positioned at the most unfavorable location).
Only vertical static deflection is calculated, and the dynamic load coefficient is not considered.

Applicable Cranes

Bridge cranes (span ≤ 30 m)
Gantry cranes (span ≤ 30 m and no cantilever, or cantilever length ≤ 0.15L)
Semi-gantry cranes (span ≤ 30 m and no cantilever, or cantilever length ≤ 0.15L)

Contact Details

DGCRANE is committed to providing the professional Overhead crane products and relavent service. Exported to Over 100 Countries, 5000+ Customers Choose Us, Worth to be Trusted.

sales@dgcrane.com

+86 373 387 6188

+86 189 3735 0200

Floor 30,Gongyuan INT'I Building, Jinsui Road, Xinxiang City, Henan Province, China

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