Free Structural Engineering Tools
Explore all structural engineering calculators including seismic design, footing design, base shear, and more — built according to ACI 318 & ASCE 7-16.
Response Spectrum Generator
Generate the design response spectrum based on site parameters Ss and S1 according to ASCE 7-16.
Seismic Design Category Calculator ASCE 7-16
Determine the Seismic Design Category (SDC) of structures based on siteconditions, risk category, and seismic parameters in accordance with ASCE 7-16.
Seismic Base Shear Calculator
Calculate seismic base shear using the Equivalent Lateral Force (ELF) method in accordance with ASCE 7-16.
Development Length Calculator
Calculate the development length for reinforcing bars in concrete structures according to ACI 318 standards.
Load Combination Generator
Generate structural load combinations based on ASCE 7-16 for LRFD and ASD design.
Isolated Footing design Online Tool
Calculate the development length for reinforcing bars in concrete structures according to ACI 318 standards.
Latest Articles
Learn structural engineering concepts and practical insights
Common Mistakes Engineers Make in ETABS (And How to Avoid Them)
A practical guide to the most common ETABS modeling mistakes — from wrong mass source settings to incorrect diaphragm assumptions — and exactly how to fix them.
What is Mass Source in ETABS? A Simple Explanation for Structural Engineers
Learn what mass source is in ETABS, why it is important in seismic analysis, and how incorrect mass definition can lead to wrong results.
How AI is Changing Structural Engineering (And What Engineers Should Know)
Discover how AI is transforming structural engineering, what it can and cannot do, and what engineers need to understand to stay ahead.