Bill Harvey service of celebration


A service of celebration for Bill Harvey will be held at Exeter... [read more]

RIP Bill Harvey


Bill Harvey, creator of Archie-M, died peacefully in the early hours of... [read more]

2017 Archie Seminars


2017 Archie Seminars: Scotland (21 August), Bristol (29 September), London... [read more]

New BoMs and a word of warning


Somewhat belated but the last two BoMs for 2014 are atNovember, WhangareiandDecember,... [read more]

August 2014


Bridge of the Month up to date again [read more]

New file


Seems that the demo uploaded was the wrong one. Sorry. now... [read more]

New Download + Bridge of the Month


DOWNLOAD Version standalone now available for... [read more]

Welcome to Obvis

After 30 years of use, Archie-M remains the preferred option for assessment with most consultants and owners in the UK and beyond. We have users as far afield as Australia.

We continue to develop both the program and the theory on which it is built. Bill is currently working on a completely new distribution model that should provide a real distinction between safe bridges and those which might deteriorate with heavy use. The model will also provide the first real indication of capacity for bridges with significant skew.


Was designed to help engineers (and the author first of all) to assess arch bridges. It is not like other programs. It is designed from the start to encourage users to explore possibilities when analysing arches rather than simply ask for a result. The first version of Archie was sold to the Northern Ireland DoE in 1985. The market grew to about 160 users by 1995 but lack of care nearly led to closure in 1999. OBVIS Ltd was formed then to build a new Archie which we call Archie-M.

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Archie-M Screen Grab

This screenshot shows Archie-M being used to assess three spans of a viaduct at Moor Street, Birmingham. The load is applied to span 2 and balancing forces have been provided from span 3 to keep the thrust inside all the piers..

Screen Grab From Archie-M