Engineering calculations, in the fields of structures & mechanics , have traditionally been written by hand using pencil, paper, log tables, a slide rule and paper copies of design standards. The development and use of electronic calculators and then computers, through the 20th Century, have transformed the methods by which designs are modelled and verification calculations written. The spectrum of analytic resources is now wide. It ranges from extremely powerful general purpose finite element programs and computational fluid dynamic programs for hydro-dynamics. Programs addressing specify classes of structure & loading conditions are available commercially and written by design companies for their own use. These are sometimes written as spreadsheets. Not surprisingly, there has also been an impact on the writing of hand calculations. These continue to be valued and it may be there are occasions where the pencil & paper method has significant advantages for early conceptual work where an analytic aid can be a distraction from the work in-hand.

Codified hand calculations do, however, have advantage. Making amendments, revisions or corrections is eased where the affect of changing design parameters is worked through a calculation by the program, instead of the laborious work being done by hand. Pre-written library programs can be called using compact statements. These can significantly add to the scope of a calculation and aid checking by providing graphic plots. Consistency of presentation is obviuosly enforced. Accuracy of results is generally ensured according to care in data entry and the veracity & suitability of formulae.

Commercially available programs include MathCAD, MatLab & Tedds. Each has particular qualities and characteristics.

Calcs is a library of engineering programs for structural & mechanical analysis.

User input data is submitted by email, the appropriate program is executed on the Calcs computer and output is returned. Any computer with an internet connection may be used for access. The system is then 'platform independent'.

The system is presently being operated as 'under development' and on-line problems will be fixed when identified. Further information is available on request.

System functional updates are available immediately as there are no user copies of the programs to amend.


2020 PROC075 Bolted Joint Prising - elliptic replace circular sections
2019 BAS008 Section Properties - load axes added
2019 Bolted Joint Prising
BAS029 FEA Added Mass - New Program
2017 PROC067 Fillet Weld Strength - New Procedure
2016 PROC074 API RP 2C Offshore Crane Loading
2016 BAS027 CALCS to <html> Conversion - New Program
2015 BAS020 Crane analysis project examples added to web page
2015 BAS020 Crane analysis output clarification added to web page
2015 BAS007 Section properties project example added to web page
2015 BAS008 Section properties project examples added to web page
2005 CALCS Website Launched
1992 Development of crane analysis program commenced
1983 BAS012 Development of matrix stiffness program commenced
1980 First contributing program written