Shear & Moment Diagrams, step by step
Works for simply supported spans, cantilevers and overhangs.
- Find the reactionsSum vertical forces and take moments about one support.
- Cut from the leftShear at a section is the sum of all forces to its left.
- Draw the shear diagramA point load steps it, a UDL slopes it, and it must close at zero.
- Integrate for momentArea under the shear diagram is the change in bending moment.
- Locate the peakMaximum moment sits where the shear crosses zero.
- Check the endsMoment is zero at a simple support and at a free cantilever tip.
UDL w on a simple span L
- Reactions wL/2 at each end
- Shear falls linearly from +wL/2 to −wL/2
- Shear is zero at mid-span
- Maximum moment = wL²/8
Educational reference. Diagram shapes are analysis; sizing the member needs a code and a qualified engineer.
Questions about the Shear & Moment Diagrams poster
- What’s on the Shear & Moment Diagrams poster?
- 6 numbered steps, with a full worked run-through. Works for simply supported spans, cantilevers and overhangs. Find the reactions — Sum vertical forces and take moments about one support.; Cut from the left — Shear at a section is the sum of all forces to its left.; Draw the shear diagram — A point load steps it, a UDL slopes it, and it must close at…; Integrate for moment — Area under the shear diagram is the change in bending moment.; Locate the peak — Maximum moment sits where the shear crosses zero.; Check the ends — Moment is zero at a simple support and at a free cantilever tip.. Educational reference. Diagram shapes are analysis; sizing the member needs a code and a qualified engineer.
- Who is the Shear & Moment Diagrams poster for?
- Shear & Moment Diagrams belongs to the Civil Engineering section rather than to a school year, because engineering is not something one grade owns. Anyone learning structural analysis can pin it up — a beginner, a student mid-course, or someone revising years later.
- When should you use the Shear & Moment Diagrams poster?
- Use it whenever you need where the beam is worst, not just how bad. A wall chart earns its place by being glanceable from where the work is happening, so Shear & Moment Diagrams belongs on the wall where that engineering work actually happens, within glancing distance, rather than filed away.
- What other posters go with Shear & Moment Diagrams?
- Braced vs Moment Frame, Beam Reactions and Bending Stress sit alongside Shear & Moment Diagrams in the Civil Engineering section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.Braced vs Moment FrameBeam ReactionsBending Stress
- Is the Shear & Moment Diagrams poster free to download and print?
- Yes. Shear & Moment Diagrams downloads as a free PDF with no account, no email and no watermark, like everything else in the Civil Engineering section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
- What size does the Shear & Moment Diagrams poster print at?
- Shear & Moment Diagrams is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Shear & Moment Diagrams loses nothing.Printing guide
Related posters
Charts that sit alongside Shear & Moment Diagrams on the same wall.
Browse every Civil Engineering poster, or start from the full catalogue.