Terms & Conditions

Data Security

We are committed to ensuring that your information is secure. In order to prevent unauthorised access or disclosure we have put in place suitable physical, electronic and managerial procedures to safeguard and secure the information we collect.

All data is stored in secure electronic systems accessible only to Oasys staff with both valid network login credentials and specific authorisation to access the system.  Our systems further limit data access by role to ensure data is available only to those who have a specific need to see it.

If at any point you suspect or receive a suspicious communication from someone suggesting they work for Oasys or a website claiming to be affiliated with Oasys, please forward the communication to us or report the incident by email to [email protected] or in writing to Oasys, 8 Fitzroy Street, London, UK, W1T 4BJ as soon as possible.

Data Security Notice Updated 27th February 2020

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Website Terms and Conditions

The contents of this web site are protected by copyright and other intellectual property rights under international conventions. No copying of any words, images, graphic representations or other information contained in this web site is permitted without the prior written permission of the webmaster for this site.

Oasys accepts no responsibility for the content of any external site that links to or from this site.

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Software Licensing Terms

Terms and Conditions of Purchase

The full conditions of purchase and maintenance for all Oasys desktop software are set out in the Oasys Software Licence and Support Agreement.

The full conditions of purchase and maintenance for Oasys Gofer and Oasys Giraphe are set out in the Gofer SaaS Agreement  and the Giraphe SaaS agreement.

All prices are subject to TAX at the current rate.

Prices and specifications are subject to change without notice – please ask for a written quotation.

Although every care has been taken to ensure the accuracy of all information contained herein, the contents do not form or constitute a representation, warranty, or part of any contract.

Superseded Versions of Terms and Conditions

Oasys keeps copies of all superseded versions of its terms and conditions.

Maintenance & Support Services

Support and maintenance is included with all subscription licences for their full duration.

Annual maintenance contracts are available for software under a perpetual licence, prices are based on a percentage of the most recent list price.

This service includes:


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Cookies Policies

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Analysing vibration with GSA

While dramatic images of swaying and collapsing bridges may be first to spring to mind, human induced vibration is more often manifested in vague feelings of discomfort, rather than catastrophic structural damage. The vibration generated by footfall in a building is typically between 4Hz an 8Hz, frequencies to which we humans are most sensitive. The London Millennium Footbridge is a common example of a structure not responding to vibrations as expected.

© Paul Carstairs


Vibration can also render a building unfit for purpose – the smallest vibrations may disrupt work in laboratories with sensitive equipment like Princeton University’s Frick or operating theatres with equally sensitive surgeons.

Human induced vibration has to be designed out within acceptable parameters, and Oasys GSA provides the FEA tools, weighted data curves and modelling tools to allow for testing, revising and reiteration.  It enables engineers to apply any of the four relevant AISC, SCI and Concrete Centre codes, GSA supports all four guidelines.

Engineers starting to delve into problems with footfall vibration can see a demonstration of Oasys GSA’s FEA footfall vibration analysis features and find out more about the science behind it, in our Introduction to Footfall Vibration and Analysis webinar.

By watching the webinar, you will learn:

  • Vibration basics
  • Vibration modes
  • Velocities and accelerations
  • Modal mass
  • Resonance and damping
  • Dynamic coefficients / Load factors
  • Footfall – the different methods
  • Modelling for footfall vibration
  • How to analyse models and report results

See also GSA’s contribution to the design of the Helix Bridge in Singapore, a structure particularly sensitive to footfall vibration.

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