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Structural

Steel connection, member buckling, composite beam, and reinforced concrete calculations — EN 1993-1-1, EN 1993-1-5, EN 1993-1-8, EN 1994-1-1, EN 1992-1-1, and AISC 360-22.

Fin Plate Moment Connection
EN 1993-1-8 §3
Splice Design
EN 1993-1-8 §3.6
Bolted Splice — EN
EN 1993-1-8 §3
Column Buckling
EN 1993-1-1 §6.3
Steel Column Flexural Buckling
EN 1993-1-1 §6.3.1
Steel N+M Interaction
EN 1993-1-1 §6.3.3
Lateral-Torsional Buckling
EN 1993-1-1 §6.3.2
Beam-Column Interaction
EN 1993-1-1 §6.3.3
Column Web Panel Shear
EN 1993-1-1 §6.2.6
Web Bearing & Buckling
EN 1993-1-1 §6.3
Plate Buckling
EN 1993-1-5
Beam Moment Capacity
EN 1993-1-1 §6.2
Shear Capacity
EN 1993-1-1 §6.2.6
Section Classification
EN 1993-1-1 Table 5.2
Deflection Check
EN 1993-1-1 §7.2
Fire Resistance
EN 1993-1-2
Endplate Moment Connection
EN 1993-1-8 §6.2.5
Baseplate Design
EN 1993-1-8 §6.2.5
Bolt Capacity
EN 1993-1-8 Table 3.4
Weld Sizing
EN 1993-1-8 §4.5
Weld Group Analysis
AISC 360-22 §J2.4
Slip-Resistant Bolts
EN 1993-1-8 §3.4
Fatigue Assessment
EN 1993-1-9
LTB — EN
EN 1993-1-1 §6.3.2
Beam Moment Capacity — EN
EN 1993-1-1 §6.2
Endplate Moment — EN
EN 1993-1-8 §6.2.5
Anchor Bolt Design — EN
EN 1993-1-8 §6.2.5
Baseplate Design — EN
EN 1993-1-8 §6.2.5
Bolt Capacity — EN
EN 1993-1-8 Table 3.4
Weld Sizing — EN
EN 1993-1-8 §4.5
Lateral-Torsional Buckling — EN
EN 1993-1-1 §6.3.2
Snow Load — EN
EN 1991-1-3
Wind Load — EN
EN 1991-1-4
Shear Stud Design — EN
EN 1994-1-1 §6.6
Composite Beam Design — EN
EN 1994-1-1 §6.2
PT Beam
EN 1994-1-1
AISC Beam Calculator
AISC 360-22 Ch. F
AISC Column Calculator
AISC 360-22 Ch. E
Purlin Design
EN 1993-1-3
Column Baseplate
AISC 360-22 F1554
Welded Moment Connection
EN 1993-1-8 §4.5.3.2 · 7 Checks · 9 Locales
Plate Girder Design
EN 1993-1-5 Class 3/4 · 9 Locales
Shear Stud Design
EN 1994-1-1 §6.6
Punching Shear
EN 1992-1-1 §6.4
RC Beam Bending & Shear
EN 1992-1-1 §6.1 + §6.2 · 9 Locales
RC Column P-M Interaction
EN 1992-1-1 §6.1 + §5.8 · 9 Locales
RC Beam Shear
EN 1992-1-1 §6.2
Crack Width
EN 1992-1-1 §7.3
Concrete Column
EN 1992-1-1 §5.8
Shear Buckling
EN 1993-1-5
Plate Girder Design
EN 1993-1-5 §4/§5/§7/§8/§9 · 5 Checks · i18n EN/NL/DE
Seismic Check
EN 1998-1
Seismic Actions
EN 1998-1 §3.2
HSS Truss Connection
EN 1993-1-8 §7
Hollow Section Joint
CIDECT DG1
Tubular Joint
EN 1993-1-8 §7
Civil

Foundation, retaining wall, and geotechnical calculations — EN 1997-1, GB 50007, IS 2911, and SCS-CN hydrology.

Slope Stability
EN 1997-1 §11 · Bishop / Janbu · 5 Presets · 9 Locales
Shallow Foundation Bearing Capacity
EN 1997-1 Annex D · Drained + Undrained · DA1/DA2/DA3 · NL/BE/FR/DE NA
Pile Capacity (EN 1997-1 / AASHTO LRFD)
EN 1997-1 DA1 · AASHTO LRFD · Shaft/Base/Group · 3 Presets · 9 Locales
Pile Bearing Capacity
EN 1997-1 / GB 50007 / IS 2911
Pile Foundation Design
EN 1997-1 §7
Retaining Wall
EN 1997-1 §9 + GB 50007
DSTV NC1 Generator
DSTV 7th edition
EN 1998 Q-Factor
EN 1998-1 §6.3.2
Steel Section Properties
EN 10365 / AISC
Traverse Closure & Bowditch
Bowditch / ISO survey
Bearing Capacity — EN 1997-1
EN 1997-1 Annex D / Meyerhof / Terzaghi
CSV Point-ID Converter
Hemisphere ↔ Stone X
Hydrology Runoff Calculator
SCS TR-55 + Rational Method
Inundation & Scour Analysis
D8 + HEC-18 · 1-ft Contour
Hydrology Report Generator
Pre/Post-Dev PDF · Contractor Spec
Civil Earthworks Cut & Fill
EN 1997-1 · BS 6031 · Prismoidal formula · Mass haul · 3 Presets · 9 Locales
Rational Method — Stormwater Runoff
Q = CiA · IDF Curves · Weighted C · Manning Pipe Sizing · HGL Check · 3 Presets · 9 Locales
Stormwater Drainage Design (EN 752-4)
EN 752-4 · Gutter/Swale Manning · Pipe Network · HGL · 3 Presets · 9 Locales
Site Grading Design (ASCE / ADAAG / AASHTO)
ASCE 38-02 · ADAAG 504/505 · AASHTO K-curve · Average-End-Area · 3 Presets · 9 Locales
Pavement Design (AASHTO 1993)
AASHTO 1993 · ESALs §3.3 · Structural Number Eq. 3.1 · Layer Coefficients Eq. 3.2 · 3 Presets · 9 Locales
Settlement Analysis (EN 1997-1 §6.6.1)
Immediate (Boussinesq) · Primary Consolidation (Terzaghi 1D) · Secondary Compression (Cα) · Time-Settlement Curve · 3 Presets · 9 Locales
Liquefaction Screening (EN 1998-5 §F)
EN 1998-5 §F · Seed & Idriss · CSR/CRR/FoS per Layer · Ishihara Settlement · 3 Presets · 9 Locales
Retaining Wall Design (EN 1997-1 / EN 1992-1-1)
EN 1997-1 §9 · Gravity/Cantilever/Counterfort · Rankine/Coulomb · DA1 · RC Stem + Base Slab · Seismic MO · 3 Presets · 9 Locales
Civil Slope Stability (EN 1997-1 / Bishop + Swedish Slice)
EN 1997-1 DA1 · Bishop Simplified · Swedish Slice (Fellenius) · r_u input · Pseudo-static Kh · FoS 1.5/1.1 · 3 Presets · 9 Locales
Electrical

NEC Art. 220 load calculations, IEC 60909 short-circuit, IEEE 80 earthing, arc flash, transformer, and cable sizing tools.

PV String Sizing
NEC 690.7(A) · Solar/PV · V_oc correction · MPPT window · NEC 690.8
Busbar Rating
IEC 60871-1 / HD 428
AC/DC Loss Analysis
IEC 61724-1 · NREL PVWatts · 8760 Energy Model
Cable Ampacity — Neher-McGrath
IEEE 835 · 3-Zone Soil · CYMCAP · NEC 690
Concentric Neutral Induced Voltage
IEEE 575 / IEC 60287-1-2
Cable Sizing
EN 60364-5-52
Cable Discrimination
IEC 60364-4-43 / IEC 60947-2
Relay Coordination — IEC 60947-2
IEC 60947-2 §8.3/§8.4
Soil Resistivity — IEEE 81
IEEE 81 · Wenner Array · Two-Layer Model
30% Soil Model
IEEE 81 · Wenner / Schlumberger · 3-Zone Trench · Solar EPC
Substation / Collection Grounding
IEEE 80/81/2778 · 9 Locales
Substation Grounding
IEEE 80-2013 · IEC 61936-1 · GB/T 50065-2011 · Sunisa-Tewarson · Schwarz · 9 Locales
Cable Sizing — IEC 60287 / NEC 310
IEC 60287 + IEC 60949 + NEC Art. 310 · Ampacity · SC Withstand · Screen Sizing · Chart.js · 3 Presets · 9 Locales
Reactive Requirements Study
FERC 827 / NERC FAC-001/002 / IEEE 1547
Reactive Compensation Sizing
IEEE 18 / IEEE 1547 — Cap Bank & STATCOM
Power Factor Correction
IEC 60831-1/2 · IEEE 18-2012 · IEEE 1036-2010 · IEC 60871-1 · Qc · h_r Resonance · ΔV% · Detuned Reactor · 9 Locales
Harmonic Distortion Limits
IEEE 519-2014 · THD-V · TDD-I · Tables 1–4 · 9 Locales
Relay Coordination
IEC 60255-151
TOV Study
IEEE C37.06 / C62.22
Insulation Coordination
IEEE C62.22 / IEC 60099-5 · 9-locale · PM_L/PM_S/TOV/Energy
Short Circuit (E/Z Method)
ANSI/IEEE C57.12.00 · E/Z · IEC 60909 · 1 bus
Short Circuit Study
ANSI/IEEE C37 · Multi-bus · κ · 4 fault types · Device adequacy
Short Circuit — IEC 60909-0
IEC 60909-0:2016 · Ik"/ip/Ib/Ik · κ · 4 fault types · 9 locales
Motor Starter Selection — IEC 60947-4-1
IEC 60947-4-1 · DOL/Star-Delta · Contactor & Overload Sizing · 3 Presets · 9 Locales
Arc Flash Study
IEEE 1584-2018 · Quick Calc + Multi-Bus 3-Scenario · DC Paukert
Transformer Sizing
EN 60076 / IEC 60076-1 · Derive + Verify kVA
Load Flow
Gauss-Seidel
SCADA + Security

IEC 62443-3-3 zone/conduit diagrams, IEC 61850-5 GOOSE bandwidth, SCADA network topology, and cyber risk register tools.

Network Topology Builder
IEC 62443-3-3
IEC 62443 Assessment
ISA/IEC 62443-2-1
SCADA Bandwidth
IEC 61850-90-4
GOOSE Network
IEC 61850-5 §13.7
Cyber Risk Register
IEC 62443-2-1 / ISO 27001
Instrument Loop & IS Calculator
IEC 60079-14 · IEC 60079-25 · ISA 5.1 · NAMUR NE 21 · 3 Presets · 9 Locales
Instrument Loop Diagram & I/O Schedule
IEC 62682 · ISA-5.1 · IEC 62443-3-3 · CSV/PDF Export · 9 Locales
SIL Verification Calculator
IEC 61511-1 §6.3 · PFDavg · 3 Presets · 9 Locales
CCTV Camera Layout & Coverage
IEC 62676-4 · EN 62676 · IEC 60839-11 · PoE 802.3af/at · 3 Presets · 9 Locales
Substation

IEEE 80-2013 earthing grid, IEC 61936 protection coordination, and substation equipment grounding calculations.

Substation Grounding
IEEE 80-2013 · IEC 61936-1 · GB/T 50065-2011 · 9 Locales
Substation Protection
IEC 60255-151
Short Circuit — IEC 60909-0
IEC 60909-0:2016 · Ik"/ip/Ib/Ik · κ factor · 9 locales
Insulation Coordination — IEEE C62.22
IEEE C62.22 / IEC 60099-4/5 · MCOV · TOV · PM_L/PM_S · 9 Locales
Substation Short-Circuit (IEC 60909)
IEC 60909-0:2016 · I"k/ip/Ib/Ik · κ · 3 presets · 9 locales · Chart.js impedance diagram
Voltage Regulation
IEC 60076-1 · Tap Changer · EN 50160 · ±10% PoC · 9 Locales
Substation Voltage Regulation
IEEE C57.12.00 / IEC 60076-1 · Tap Changer · EN 50160 · Chart.js Profile · 9 Locales
Cable Tray Sizing
IEC 60364-5-52 / NEC Art. 392 · Fill Factor · Derating · 9 Locales
Transformer Protection
IEC 60255-151 · Diff Protection · CT Ratio · Inrush · 9 Locales
Transformer Differential Protection
IEC 60255-111 · CT Ratio · Dual-Slope Id/Ir · Inrush/Overflux Restraint · 3 Presets · 9 Locales
Protection Coordination Curves
IEC 60255-151 · IDMT · Fuse-Relay Selectivity · TCC · 9 Locales
Relay TCC Coordination (IEC 60255-151)
IEC 60255-151 · IDMT SI/VI/EI/LTI · CTI ≥ 0.2s · Log-Log Chart.js · 3 Presets · 9 Locales
Switchgear Selection (IEC 62271)
IEC 62271-100/200 · CB Rating · IP Rating · 3 Presets · 9 Locales
MV Switchgear Selection (IEC 62271-200)
IEC 62271-200 · Panel Code · Insulation Levels · Altitude Derating · IAC AFLR · 3 Presets · 9 Locales
BESS

Battery storage grid connection studies (IEEE 1547 / IEC 61000-3-6), cycle life degradation, and thermal management tools.

BESS Capacity & Round-Trip Sizing
IEC 62933-2-1 · IEEE 2030.2.1 · LFP/NMC/LTO · RTE · Augmentation · 9 Locales
BESS Thermal Management
NFPA 855 / UL 9540A
BESS Fire Suppression Sizing
NFPA 855 / NFPA 12A / IEC 62933-5-2 · HFC-227ea / CO₂ / FM-200 / Novec 1230 · 9 Locales
BESS Grid Connection
IEEE 1547 / IEC 61000-3-6
BESS Islanding Protection
IEC 62116 / IEEE 1547-2018 · Q(V) + P(f) droop · 3 Presets · 9 Locales
BESS Cycle Life
Arrhenius degradation
BESS SOH & Degradation
SOH curve · RUL · Revenue impact · 5 Presets · 9 Locales
BESS SoC Optimization & Energy Throughput
Usable kWh · Annual MWh · Warranty years · Optimal SoC window · Chart.js · 3 Presets · 9 Locales
BESS Cycle Stress & Degradation Rate
DoD curves · C-rate stress · Calendar aging · Optimal window · 5 Presets · 9 Locales
BESS Cycle Stress & Calendar Aging
IEC 62660-1 · Wöhler + Arrhenius · EOL projection · LCOE impact · 3 Presets · 9 Locales
BESS System Sizing
kWh · kW · C-rate · DoD · Autonomy · Inverter · Rack/String count · 3 Presets · 9 Locales
BESS DC-DC Converter Efficiency
Conduction losses · Switching losses · Boost/Buck/Resonant · 9 Locales
BESS DC Arc Flash
IEEE 1584-2018 DC · Ammerman · Stokes-Oppenlander · NFPA 70E HRC 0–4 · 3 Presets · 9 Locales
BESS Thermal Runaway Risk
IEC 62619 / UL 9540A / NFPA 855 · Risk matrix · HRR chart · Suppression sizing · 3 Presets · 9 Locales
BESS Sizing
IEC 62933 + NFPA 855
Battery Sizing
IEC 62933-2-1

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