Tools and Methods

Engineering

Robert Darvas Associates utilizes many structural engineering and visualization methods.
Tools for structural analysis include software such as Multiframe, RAM Integrated System, and Staad,
as well as custom programs, spreadsheets, and even quick hand calculations for estimates and
confirmation of results. Visualization of structural systems may involve anything from 3-D computer
modeling in FormZ to physical cardboard and wood models.

We value technology where it brings greater efficiency and insight, but we believe that true
structural design requires a holistic understanding of architectural, engineering coordination,
and construction issues. The flexibility of our methods and our work flow allow us to choose the
best strategy for each project.

Our designs typically utilize timber, steel, reinforced concrete, and masonry as structural
materials. We also work with special structures, including cable tensioned fabric and structural
aluminum. Although new buildings, additions, and renovations are our specialty, we have also
engineered bridges and hydraulic projects.

Technology

All of our construction documents are drawn in Engineered Software's PowerCADD, a 2-D drafting
program with a powerful, easy to learn interface. It includes some features usually found in
desktop publishing and illustration programs, so it allows us an unusual amount of control over
the structure and appearance of our drawings. In addition, the invaluable Wildtools plug-in has a set of
quick and easy isometric drawing tools, making it possible for us to use 3-D details without having
to create 3-D models. Examples of RDA drawings done by Deidre Calarco are posted on
Engineered Software's web site, in the Drawing Room.

RDA has been using Macintosh computers since the mid-eighties. Although we now have a mixed
platform network, including several Windows machines and a Linux server, Macs tend to keep
our training and maintenance costs (and susceptibility to viruses) low. PowerCADD and our
main structural design program, Multiframe, run on the Mac. Our desktop Macs can also run
many Windows programs using Virtual PC.

Although our choice of primary OS and drafting software is atypical, we seldom have problems with
compatibility. PowerCADD can read and write dxf and dwg files, and we frequently exchange
electronic data with clients who use AutoCAD, Microstation, ArchiCAD, and other drafting programs.
Since we use the newest version of Microsoft Office, the exchange of Excel and Word documents is
seamless.

We have a fast ethernet LAN with desktop e-mail and web access for every employee. We
keep our computer and office hardware and software up to date. Recent additions include a high
resolution color "E" sized plotter and a large format white paper print machine.