The spreadsheets are regularly updated to reflect the latest versions of the International Building Code (IBC) and California Building Code (CBC) .
in the United Kingdom (MIStructE). Licensed General Engineering Contractor .
Includes designs for beams, columns, walls, and slabs, often following ACI 318 standards.
The primary focus of Daniel T. Li’s work is a collection of approximately . These tools are built using Microsoft Excel (specifically .xlsb and .xlsm formats) and are designed to provide a comprehensive, transparent, and easy-to-use platform for structural analysis. Key Categories of Design Spreadsheets:
Structural engineers often prefer these spreadsheets over "black-box" software because they offer a higher degree of transparency and flexibility.
Free "limited" or demo versions are often available for download on the official site so engineers can test the input/output interface before committing to a professional license.
DTL generally does not sell individual software modules because the databases are often interlinked. Instead, users purchase a license for the entire package of hundreds of spreadsheets.
Daniel T. Li, Ph.D., S.E., is a prominent figure in the field of structural engineering, best known for developing an extensive library of professional structural design spreadsheets through his company, Engineering International Inc. .
The software is licensed through Engineering International Inc. rather than sold as individual files.