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Superseded Versions of Terms and Conditions

Oasys keeps copies of all superseded versions of its terms and conditions.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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A40 Lledr Valley Improvement

Project Overview

The widening and upgrade of 7.2km of the A470 Road, which runs along the Lledr Valley between North and South Wales, has improved safety and journey times for the once narrow and hazardous road. The highly sensitive environment along a steep section of the Snowdonia National Park adjacent to the Afon River posed a challenge, particularly for the construction of the 3.5km of retaining walls varying in height from less than 2m up to 13m.

Due to the rocky terrain, flexibility was required for planning and delivery, therefore a collaborative approach was adopted for this design-and-build contract between the client: Welsh Assembly Government, the client’s agent: Halcrow, the Contractor: Laing O’Rourke, and the Principal Designer: Arup.

How Oasys proved invaluable

An extensive range of the Oasys suite of structural and geotechnical engineering software was used to provide an innovative and adaptable solution. For structural analysis the software GSA and AdSec were used, and for the geotechnical aspects Frew, Slope and Pdisp were used, which cover analysis of retaining walls, slope stability, stability of retaining walls and soil settlement respectively.

The retaining walls consist of a combination of traditional stone walls, reinforced concrete walls with stone-clad parapets and cantilever stem walls. In taller sections an adaptable system using concrete panels and rock anchors was developed, with the panels of 3, 5 or 7m tall with either 2 or 4 rock anchors. The walls themselves are supported on rock or steel encased small diameter piles of 2-10m length. The steel cases limited debris in the pile bore and minimised cover required, providing a more efficient use of reinforcement cages. These piles were analysed using Oasys’ AdSec.

Extensive modelling and analysis of the retaining wall panels was carried out prior to construction using GSA, assessing the different panel heights, anchor angles and spacings. The effects of anchor forces and impact forces were evaluated. Slope stability was analysed using Slope to look at varying depths to rock, slope gradients and optimal pre-stressing requirements of rock anchors. The team used Pdisp to investigate the settlement of the road due to the construction of the concrete walls. In some instances new walls were propped against existing walls – the engineers used Frew to calculate the embedment depth of these walls to determine overall stability.

The road remained operational at all times so the sequencing of construction was critical. The team used Frew to analyse staging options to predict that where obstructions were found, retaining wall panels could be skipped and installed at a later date. This minimised the disruption of the traffic and overall programme. Frew was also used to analyse an option of backfilling prior to anchor installation – this minimised excavation and the need to compact the backfill in confined spaces around the anchors.

The simulation of the engineering tasks using both the geotechnical and structural software from Oasys enabled fast adaptation to site conditions to provide an efficient design. As a result of this process, amongst other factors, the project was delivered five months ahead of schedule and within budget.

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