RC Design Workbench
Verify with a licensed PE

Reinforced Concrete Design Workbench

Interactive solvers for beam, column, joint and retrofit design per NSCP 2015 and ACI 318-19 — with transparent, printable A4 calculation sheets.

12 calculators A4 calc sheets JSON API NSCP 2015 / ACI 318-19

Beam

Beam

Beam Moment Capacity

Flexural capacity with iterative neutral-axis solver

NSCP 2015 §422.2
Beam

Beam Shear Design

Concrete and stirrup shear capacity with spacing design

ACI 318M-14
Beam

Beam Torsion Design

Combined shear-torsion interaction checks

NSCP 2015 §422.7
Beam

Beam Deflection

Immediate and long-term deflection with effective inertia

NSCP 2015 §424.2

Column

Column

Column Design

P-M / P-M-M interaction diagram with section layout

NSCP 2015 / ACI 318-19
Column

Column Flexural Check

Minimum column-to-beam flexural strength ratio

NSCP 2015 §418.7.3

Retrofit

Retrofit

Column Concrete Jacketing

RC jacket on an existing column — P-M, confinement, shear, interface transfer

ACI 318-19 / ACI 562-16

Joint

Joint

Joint Shear

Joint shear verification for special moment frames

NSCP 2015 §418.8.4

Analysis

Analysis

Moment-Curvature

M-φ relationship, quick 6-point or incremental fiber

NSCP 2015 / ACI 318-19
Analysis

Alternative Inertia

Effective moment of inertia, alternative method

NSCP 2015 §424.2.3.5

Material

Material

Mander Confined Concrete

Confined concrete strength and strain (Mander 1988)

Mander et al. (1988)

Detailing

Detailing

Development Length

Hook geometry for deformed bars and stirrups

NSCP 2015 §425

REST API

Every calculator is also a JSON endpoint — send a POST request with a JSON body.

EndpointDescription
POST /api/beam/momentBeam moment capacity
POST /api/beam/shearBeam shear design
POST /api/beam/torsionBeam torsion checks
POST /api/beam/deflectionBeam deflection
POST /api/column/interactionP-M interaction diagram
POST /api/column/flexuralColumn flexural check
POST /api/column-jacket/designColumn concrete jacketing
POST /api/joint/shearJoint shear verification
POST /api/mander/confinedMander confined concrete
POST /api/section/development-lengthHook geometry
POST /api/section/moment-curvatureMoment-curvature
POST /api/section/rebar-layoutRebar coordinates
POST /api/section/alternative-inertiaAlternative Ie