SCI Tedds modules for specialist steel design

Recognising that Trimble Tedds is a widely used, and widely appreciated tool to facilitate design, SCI have launched the first of a range of specialist SCI Tedds modules. In many cases these will supplement an SCI publication, or Advisory Desk note, by providing a tool that implements the design process that has been described. SCI is uniquely placed to produce such tools given the information we harvest from providing technical support to our members. The use of the modules not only makes the whole design easy, but also adds credibility with checking authorities and warranty providers due to its SCI provenance.


The following Tedds modules are available as part of SCI’s  Specialist Steel Design tools:

  • Method for Extending Fire Test Results module implements the procedures described in the 2021 SCI publication “P424 - Fire Resistance of Light Steel Framing”. The publication contains procedures to show how loaded fire test results for walls and floors may be extended to other design cases which have the same build-up. This module assists the user in performing these procedures, in accordance with Appendix A or Appendix B of the publication, as appropriate.
  • Composite Slab Opening Designer module addresses the topic of service openings in composite slabs, providing a method to design the reinforcement required around individual or multiple service openings. The calculation method is based on the guidance provided in "SCI P300 Composite Slabs and Beams using Steel Decking: Best Practice for Design and Construction" that covers the design and construction of composite floors, paying particular attention to the good practice aspects, and extended through AD 447 and other recent work by SCI.
  • Resistance of Composite Slabs to Concentrated Loads implements a new calculation procedure produced by SCI (and published in SCI Advisory Desk notes AD 450 & AD 477), which determines the reinforcement required in a composite slab subject to one or more concentrated loads. Importantly, and as described in the AD notes, it should be used to check all situations with concentrated loads as the Eurocode allowance for ‘nominal reinforcement without design’ when loads are below a certain value has been wrongly interpreted in the past. The procedure allows for optimisation of the effective widths of the slab assumed to support the concentrated load, finding the best compromise between longitudinal and transverse requirements. The process may also be used to justify existing transverse reinforcement provision when an ‘unexpected’ load, such as that from a MEWP or similar vehicle, is applied.
  • Light Gauge Steel Member Designer is based on the provisions of EN 1993-1-3 for the design of cold-formed members and sheeting along with EN 1993-1-1 and their associated UK National Annexes. There is a wide range of geometries for light gauge steel sections supported, however, the built-in sections available in the module are plain C-shapes (tracks), lipped C-sections (studs), lipped Z-sections (purlins). The scope of this module is to process the provided data from the user in order to perform all the required member strength checks (ULS) to Eurocode 3.


Modules are offered for an annual licence fee, with different options to cover organisations of different sizes and the purchase of multiple modules in one go. View the full range here.


See SCI Tedds Modules in action:

Watch demonstrations of how Tedds Modules work:

View sample calculation reports:


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