Sukit Yindeesukดร. สุกิจ ยินดีสุข
I specialize in nonlinear finite element analysis, strut-and-tie modeling, and the design, assessment and rehabilitation of reinforced concrete and cable-supported bridge structures. SY Suite grew out of that work: Dr. Sukit Yindeesuk and his SY Research Lab performed the research, developed the software and hold the technology behind these engineering applications — connecting research from the University of Illinois and UNSW with two decades of field practice on Thailand's bridges and highways.
From research to practical solutions and products — for a stronger engineering community.
Research-born technology, open to education and the public sector
Who develops SY Suite, who may use it free of charge, and who to contact for business.
Developed and owned by SY Research Lab
SY Suite is performed, developed and owned by Dr. Sukit Yindeesuk and his SY Research Lab. Every solver — the fibre-section and MCFT engines, the member and bridge models, the geotechnical tools — comes from the lab's own research and verification work, published and tested against laboratory data.
About the research →Universities & government — free
Universities, academic programmes and government agencies use SY Suite free of charge. The academic version includes SY Column and SY GirderNL with every function; SY BridgeNL is limited to 2 spans, boring-log input to 10 logs, and the AI assistant is not included — so students work the problem themselves. Register and subscribe with your official university or government e-mail.
Register with your official e-mail →Business & enterprise — contact MT
All other business and investment — including enterprise licences, training and support agreements — is handled by Multi Disciplinary Team Co., Ltd. (MT), the authorised business partner for SY Suite.
multiteam.co →natchanan.ak@gmail.com
SY Suite — Structural Engineering Software
Browser-based analysis and data tools for practicing structural, bridge and geotechnical engineers — one account, every tool, calculation reports and drawings included.
SY Column
Nonlinear P–Mx–My interaction surfaces by the fiber method, confined-concrete and steel-shape materials, biaxial moment–curvature, ACI / AASHTO / AISC shear design, slenderness, and A1 drawing sheets with DXF export.
Launch →
SY GirderNL
Nonlinear moment–curvature, MCFT shear response, full-member analysis with AASHTO HL-93 live load, post-tensioning, capacity interaction diagrams, and the member report with drawing set.
Launch →
SY BridgeNL
Alignment-first parametric RC / PC bridge model — PIs and PVIs with policy checks, spans, supports and superstructure on the 3-D FE model, static, eigen, response-spectrum, time-history, moving-load and construction-stage analysis, with the design report and drawing set.
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SY Pave
EPS block geofoam beneath pavements — AASHTO LRFD live-load surcharge, AASHTO 1993 rigid slab, NCHRP 529 stability checks, with PDF reports and drawings.
Launch →
SY Pile
Axial capacity by allowable stress on real boring logs, lateral response with linear and nonlinear p-y curves, cracked flexural stiffness, pile groups, handling and driving checks, with the PL-01 drawing sheet and a PDF calculation report.
Launch →
SY GeoData
Boreholes with location, soil and rock layers, samples and tests, versions and approval, SPT correlations and advanced search — SY-verified shared data that feeds SY Pile directly.
Launch →
SY SmartHub
Every report and drawing you print in any SY tool is kept here by project — open, download or share it later. The SY Library holds the user manuals, worked examples and verification examples; Adopt opens an example as a live model in the tool. Included with every plan.
Open SmartHub →Your AI assistant runs the tools
Every SY Suite tool is also available to your AI assistant through the SY Suite connector — create sections, run analyses, and receive the same reports and drawings, metered in prepaid credits. Reads are free.
Connect from Settings →Research, practice, and knowledge-sharing
Across structural and bridge engineering.
Research
Strut-and-tie modeling, nonlinear FEA, topology optimization, and structural health monitoring.
Explore research →Consulting
Bridge and building design, forensic investigation, seismic assessment, and structural health monitoring.
View services →Publications
Peer-reviewed journal papers, conference proceedings, and a book on complex D-Region design.
Read publications →Training
Hands-on programs in bridge analysis software, nonlinear FEA, and structural strengthening.
See programs →