iStruct2D

iStruct2D turns your iPad into a 2D structural-analysis sketchpad. Draw a beam, frame or truss with your finger or Apple Pencil, add supports and loads, and tap once to see exactly how it behaves — reactions, shear, bending, axial force and the deflected shape.

Built for engineering students, educators and professionals who want to test an idea, check a result by hand, or simply understand how a structure carries load — without the friction of desktop software.

DRAW BY HAND

• Drag to place each member; members that share an end automatically join at a node

• Endpoints snap to the grid and to existing nodes

• Tap any length to type an exact value

• Two fingers pan and zoom — or switch on Apple Pencil mode to draw while your fingers navigate

ADD SUPPORTS

• Pin, roller and fully-fixed supports

• Tap to choose the orientation, then drag onto a node

• A drop ring turns green the moment a support is in range to attach

APPLY LOADS

• Point loads and moments

• Distributed loads — uniform or trapezoidal, with separate start and end magnitudes

• Acting perpendicular to the member, or locked to a global axis

ANALYSE IN ONE TAP

• Solved with the direct stiffness method

• Several independent structures in one workspace, each solved on its own

• Unstable structures and mechanisms are detected and clearly flagged

READ THE RESULTS

• Toggle reactions, shear, bending, axial and the deflected shape

• Scrub along any member to read the exact value at any point

• Critical (maximum) values are located for you automatically

• Tap a single reaction to inspect it on its own

• Show, blur or hide the loads and supports over the diagrams

• A summary lists every governing value at a glance

WORK FASTER

• Full undo / redo history

• Select a whole structure to move, duplicate or delete it

• Switch force units (N, kN) and length units (mm, m)

• Open the bundled Demo Examples — a worked frame, beam and truss — to explore

EVERYTHING STAYS ON YOUR DEVICE

Projects are saved locally on your iPad. No account, no sign-up, no tracking.

CO-DEVELOPED WITH THE UNIVERSITY OF QUEENSLAND

iStruct2D is co-developed with the UQ School of Civil Engineering.

PLEASE NOTE

iStruct2D is currently in beta and is intended for learning, exploration and preliminary reference. Results are for reference only — always apply your own engineering judgement. The app is not a substitute for a qualified structural engineer, accredited design software, or compliance with any building code or standard.